Android中Notification的framework层讲解
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android的notificaiton的声音sound也是申请的AudioManager机制来播放声音的。最近让我找恢复出厂设置后，手机刚启动，接受短信没有声音，如果恢复出厂设置后，等一会儿，过个2分钟再接受短信，就有铃声了。下面我把我分析代码的方法写下来，给自己和读者一些启发：
日历也是用的是Notification，但是恢复出厂设置后，立马设置日历后，日历可以出声音，我看日历的代码，结果发现日历只是用了Notification的闪屏，真正声音是日历自己实现了Mediaplayer来出声音的。所以我又不得不老老实实地研究Notification.sound到底把声音传递到什么地方去了？
首先，我在短信的com.android.mms.transaction包中的MessagingNotification的573行的java代码：notification.sound = TextUtils.isEmpty(ringtoneStr) ? null : Uri.parse(ringtoneStr);打log查看，发现这个uri确实是存在的，我推测：就是说这个uri传给了framework一层，但是framework一层有没有执行完的动作，所以不响。为了验证是不是短信的错误，我自己单独写了个notification的例子，一个按钮，点击就发出声音。这个例子在正常情况下能正常发声。我就恢复出厂设置后，运行这个例子，结果发现没有声音，这就充分验证了我的猜测。我就去framework去着notificaion.sound = 的声音传递给framework做什么事情了？？ 接着，在Source Insight软件中导入framework整个工程，然后搜索，notificaiton.sounds，结果搜到了，在framework/base/core/java/android/app/Notification.java类。/** Copyright (C) 2007 The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/ package android.app; import java.util.Date; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.media.AudioManager; import android.net.Uri; import android.os.Parcel; import android.os.Parcelable; import android.text.TextUtils; import android.text.format.DateFormat; import android.text.format.DateUtils; import android.widget.RemoteViews; /*** A class that represents how a persistent notification is to be presented to* the user using the {@link android.app.NotificationManager}.** <p>For a guide to creating notifications, see the* <a href="{@docRoot}guide/topics/ui/notifiers/notifications.html">Creating Status* Bar Notifications</a> document in the Dev Guide.</p>*/ public class Notificationimplements Parcelable { /** * Use all default values (where applicable). */ public staticfinalint DEFAULT_ALL = ~0; /** * Use the default notification sound. This will ignore any given * {@link #sound}. * * @see #defaults */ public staticfinalint DEFAULT_SOUND =1; /** * Use the default notification vibrate. This will ignore any given * {@link #vibrate}. Using phone vibration requires the * {@link android.Manifest.permission#VIBRATE VIBRATE} permission. * * @see #defaults */ public static finalint DEFAULT_VIBRATE =2; /** * Use the default notification lights. This will ignore the * {@link #FLAG_SHOW_LIGHTS} bit, and {@link #ledARGB}, {@link #ledOffMS}, or * {@link #ledOnMS}. * * @see #defaults */ public staticfinalint DEFAULT_LIGHTS =4; /** * The timestamp for the notification. The icons and expanded views * are sorted by this key. */ public long when; /** * The resource id of a drawable to use as the icon in the status bar. */ public int icon; /** * The number of events that this notification represents. For example, in a new mail * notification, this could be the number of unread messages. This number is superimposed over * the icon in the status bar. If the number is 0 or negative, it is not shown in the status * bar. */ public int number; /** * The intent to execute when the expanded status entry is clicked. If * this is an activity, it must include the * {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires * that you take care of task management as described in the <em>Activities and Tasks</em> * section of the <a href="{@docRoot}guide/topics/fundamentals.html#acttask">Application * Fundamentals</a> document. */ public PendingIntent contentIntent; /** * The intent to execute when the status entry is deleted by the user * with the "Clear All Notifications" button. This probably shouldn't * be launching an activity since several of those will be sent at the * same time. */ public PendingIntent deleteIntent; /** * An intent to launch instead of posting the notification to the status bar. * Only for use with extremely high-priority notifications demanding the user's * <strong>immediate</strong> attention, such as an incoming phone call or * alarm clock that the user has explicitly set to a particular time. * If this facility is used for something else, please give the user an option * to turn it off and use a normal notification, as this can be extremely * disruptive. */ public PendingIntent fullScreenIntent; /** * Text to scroll across the screen when this item is added to * the status bar. */ public CharSequence tickerText; /** * The view that will represent this notification in the expanded status bar. */ public RemoteViews contentView; /** * If the icon in the status bar is to have more than one level, you can set this. Otherwise, * leave it at its default value of 0. * * @see android.widget.ImageView#setImageLevel * @see android.graphics.drawable#setLevel */ public int iconLevel; /** * The sound to play. * * <p> * To play the default notification sound, see {@link #defaults}. * </p> */ public Uri sound; /** * Use this constant as the value for audioStreamType to request that * the default stream type for notifications be used. Currently the * default stream type is STREAM_RING. */ public staticfinalint STREAM_DEFAULT = -1; /** * The audio stream type to use when playing the sound. * Should be one of the STREAM_ constants from * {@link android.media.AudioManager}. */ public int audioStreamType = STREAM_DEFAULT; /** * The pattern with which to vibrate. * * <p> * To vibrate the default pattern, see {@link #defaults}. * </p> * * @see android.os.Vibrator#vibrate(long[],int) */ public long[] vibrate; /** * The color of the led. The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledARGB; /** * The number of milliseconds for the LED to be on while it's flashing. * The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledOnMS; /** * The number of milliseconds for the LED to be off while it's flashing. * The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledOffMS; /** * Specifies which values should be taken from the defaults. * <p> * To set, OR the desired from {@link #DEFAULT_SOUND}, * {@link #DEFAULT_VIBRATE}, {@link #DEFAULT_LIGHTS}. For all default * values, use {@link #DEFAULT_ALL}. * </p> */ public int defaults; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if you want the LED on for this notification. * <ul> * <li>To turn the LED off, pass 0 in the alpha channel for colorARGB * or 0 for both ledOnMS and ledOffMS.</li> * <li>To turn the LED on, pass 1 for ledOnMS and 0 for ledOffMS.</li> * <li>To flash the LED, pass the number of milliseconds that it should * be on and off to ledOnMS and ledOffMS.</li> * </ul> * <p> * Since hardware varies, you are not guaranteed that any of the values * you pass are honored exactly. Use the system defaults (TODO) if possible * because they will be set to values that work on any given hardware. * <p> * The alpha channel must be set for forward compatibility. * */ public staticfinalint FLAG_SHOW_LIGHTS =0x00000001; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if this notification is in reference to something that is ongoing, * like a phone call. It should not be set if this notification is in * reference to something that happened at a particular point in time, * like a missed phone call. */ public static finalint FLAG_ONGOING_EVENT =0x00000002; /** * Bit to be bitwise-ored into the {@link #flags} field that if set, * the audio will be repeated until the notification is * cancelled or the notification window is opened. */ public staticfinalint FLAG_INSISTENT =0x00000004; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if you want the sound and/or vibration play each time the * notification is sent, even if it has not been canceled before that. */ public static finalint FLAG_ONLY_ALERT_ONCE =0x00000008; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if the notification should be canceled when it is clicked by the * user. */ public staticfinalint FLAG_AUTO_CANCEL =0x00000010; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if the notification should not be canceled when the user clicks * the Clear all button. */ public static finalint FLAG_NO_CLEAR =0x00000020; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if this notification represents a currently running service. This * will normally be set for you by {@link Service#startForeground}. */ public staticfinalint FLAG_FOREGROUND_SERVICE =0x00000040; public int flags; /** * Constructs a Notification object with everything set to 0. */ public Notification() { this.when = System.currentTimeMillis(); } /** * @deprecated use {@link #Notification(int,CharSequence,long)} and {@link #setLatestEventInfo}. * @hide */ public Notification(Context context,int icon, CharSequence tickerText,long when, CharSequence contentTitle, CharSequence contentText, Intent contentIntent) { this.when = when; this.icon = icon; this.tickerText = tickerText; setLatestEventInfo(context, contentTitle, contentText, PendingIntent.getActivity(context, 0, contentIntent,0)); } /** * Constructs a Notification object with the information needed to * have a status bar icon without the standard expanded view. * * @param icon The resource id of the icon to put in the status bar. * @param tickerText The text that flows by in the status bar when the notification first * activates. * @param when The time to show in the time field. In the System.currentTimeMillis * timebase. */ public Notification(int icon, CharSequence tickerText,long when) { this.icon = icon; this.tickerText = tickerText; this.when = when; } /** * Unflatten the notification from a parcel. */ public Notification(Parcel parcel) { int version = parcel.readInt(); when = parcel.readLong(); icon = parcel.readInt(); number = parcel.readInt(); if (parcel.readInt() !=0) { contentIntent = PendingIntent.CREATOR.createFromParcel(parcel); } if (parcel.readInt() !=0) { deleteIntent = PendingIntent.CREATOR.createFromParcel(parcel); } if (parcel.readInt() !=0) { tickerText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); } if (parcel.readInt() !=0) { contentView = RemoteViews.CREATOR.createFromParcel(parcel); } defaults = parcel.readInt(); flags = parcel.readInt(); if (parcel.readInt() !=0) { sound = Uri.CREATOR.createFromParcel(parcel); } audioStreamType = parcel.readInt(); vibrate = parcel.createLongArray(); ledARGB = parcel.readInt(); ledOnMS = parcel.readInt(); ledOffMS = parcel.readInt(); iconLevel = parcel.readInt(); if (parcel.readInt() !=0) { fullScreenIntent = PendingIntent.CREATOR.createFromParcel(parcel); } } public Notification clone() { Notification that = new Notification(); that.when = this.when; that.icon = this.icon; that.number = this.number; // PendingIntents are global, so there's no reason (or way) to clone them. that.contentIntent = this.contentIntent; that.deleteIntent = this.deleteIntent; that.fullScreenIntent = this.fullScreenIntent; if (this.tickerText !=null) { that.tickerText = this.tickerText.toString(); } if (this.contentView !=null) { that.contentView = this.contentView.clone(); } that.iconLevel = that.iconLevel; that.sound = this.sound;// android.net.Uri is immutable that.audioStreamType = this.audioStreamType; final long[] vibrate = this.vibrate; if (vibrate != null) { finalint N = vibrate.length; final long[] vib = that.vibrate =newlong[N]; System.arraycopy(vibrate, 0, vib,0, N); } that.ledARGB = this.ledARGB; that.ledOnMS = this.ledOnMS; that.ledOffMS = this.ledOffMS; that.defaults = this.defaults; that.flags = this.flags; return that; } public int describeContents() { return 0; } /** * Flatten this notification from a parcel. */ public void writeToParcel(Parcel parcel, int flags) { parcel.writeInt(1); parcel.writeLong(when); parcel.writeInt(icon); parcel.writeInt(number); if (contentIntent != null) { parcel.writeInt(1); contentIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } if (deleteIntent != null) { parcel.writeInt(1); deleteIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } if (tickerText != null) { parcel.writeInt(1); TextUtils.writeToParcel(tickerText, parcel, flags); } else { parcel.writeInt(0); } if (contentView != null) { parcel.writeInt(1); contentView.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } parcel.writeInt(defaults); parcel.writeInt(this.flags); if (sound != null) { parcel.writeInt(1); sound.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } parcel.writeInt(audioStreamType); parcel.writeLongArray(vibrate); parcel.writeInt(ledARGB); parcel.writeInt(ledOnMS); parcel.writeInt(ledOffMS); parcel.writeInt(iconLevel); if (fullScreenIntent !=null) { parcel.writeInt(1); fullScreenIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } } /** * Parcelable.Creator that instantiates Notification objects */ public staticfinal Parcelable.Creator<Notification> CREATOR = new Parcelable.Creator<Notification>() { public Notification createFromParcel(Parcel parcel) { returnnew Notification(parcel); } public Notification[] newArray(int size) { return new Notification[size]; } }; /** * Sets the {@link #contentView} field to be a view with the standard "Latest Event" * layout. * * <p>Uses the {@link #icon} and {@link #when} fields to set the icon and time fields * in the view.</p> * @param context The context for your application / activity. * @param contentTitle The title that goes in the expanded entry. * @param contentText The text that goes in the expanded entry. * @param contentIntent The intent to launch when the user clicks the expanded notification. * If this is an activity, it must include the * {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires * that you take care of task management as described in * <a href="{@docRoot}guide/topics/fundamentals.html#lcycles">Application Fundamentals: Activities and Tasks</a>. */ public void setLatestEventInfo(Context context, CharSequence contentTitle, CharSequence contentText, PendingIntent contentIntent) { RemoteViews contentView = new RemoteViews(context.getPackageName(), com.android.internal.R.layout.status_bar_latest_event_content); if (this.icon !=0) { contentView.setImageViewResource(com.android.internal.R.id.icon,this.icon); } if (contentTitle != null) { contentView.setTextViewText(com.android.internal.R.id.title, contentTitle); } if (contentText !=null) { contentView.setTextViewText(com.android.internal.R.id.text, contentText); } if (this.when !=0) { contentView.setLong(com.android.internal.R.id.time,"setTime", when); } this.contentView = contentView; this.contentIntent = contentIntent; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("Notification(vibrate="); if (this.vibrate !=null) { int N =this.vibrate.length-1; sb.append("["); for (int i=0; i<N; i++) { sb.append(this.vibrate[i]); sb.append(','); } if (N != -1) { sb.append(this.vibrate[N]); } sb.append("]"); } else if ((this.defaults & DEFAULT_VIBRATE) !=0) { sb.append("default"); } else { sb.append("null"); } sb.append(",sound="); if (this.sound !=null) { sb.append(this.sound.toString()); } else if ((this.defaults & DEFAULT_SOUND) !=0) { sb.append("default"); } else { sb.append("null"); } sb.append(",defaults=0x"); sb.append(Integer.toHexString(this.defaults)); sb.append(",flags=0x"); sb.append(Integer.toHexString(this.flags)); sb.append(")"); return sb.toString(); } } [java] view plaincopy/** Copyright (C) 2007 The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/ package android.app; import java.util.Date; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.media.AudioManager; import android.net.Uri; import android.os.Parcel; import android.os.Parcelable; import android.text.TextUtils; import android.text.format.DateFormat; import android.text.format.DateUtils; import android.widget.RemoteViews; /*** A class that represents how a persistent notification is to be presented to* the user using the {@link android.app.NotificationManager}.** <p>For a guide to creating notifications, see the* <a href="{@docRoot}guide/topics/ui/notifiers/notifications.html">Creating Status* Bar Notifications</a> document in the Dev Guide.</p>*/ public class Notificationimplements Parcelable { /** * Use all default values (where applicable). */ public staticfinalint DEFAULT_ALL = ~0; /** * Use the default notification sound. This will ignore any given * {@link #sound}. * * @see #defaults */ public staticfinalint DEFAULT_SOUND =1; /** * Use the default notification vibrate. This will ignore any given * {@link #vibrate}. Using phone vibration requires the * {@link android.Manifest.permission#VIBRATE VIBRATE} permission. * * @see #defaults */ public staticfinalint DEFAULT_VIBRATE =2; /** * Use the default notification lights. This will ignore the * {@link #FLAG_SHOW_LIGHTS} bit, and {@link #ledARGB}, {@link #ledOffMS}, or * {@link #ledOnMS}. * * @see #defaults */ public staticfinalint DEFAULT_LIGHTS =4; /** * The timestamp for the notification. The icons and expanded views * are sorted by this key. */ public long when; /** * The resource id of a drawable to use as the icon in the status bar. */ public int icon; /** * The number of events that this notification represents. For example, in a new mail * notification, this could be the number of unread messages. This number is superimposed over * the icon in the status bar. If the number is 0 or negative, it is not shown in the status * bar. */ public int number; /** * The intent to execute when the expanded status entry is clicked. If * this is an activity, it must include the * {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires * that you take care of task management as described in the <em>Activities and Tasks</em> * section of the <a href="{@docRoot}guide/topics/fundamentals.html#acttask">Application * Fundamentals</a> document. */ public PendingIntent contentIntent; /** * The intent to execute when the status entry is deleted by the user * with the "Clear All Notifications" button. This probably shouldn't * be launching an activity since several of those will be sent at the * same time. */ public PendingIntent deleteIntent; /** * An intent to launch instead of posting the notification to the status bar. * Only for use with extremely high-priority notifications demanding the user's * <strong>immediate</strong> attention, such as an incoming phone call or * alarm clock that the user has explicitly set to a particular time. * If this facility is used for something else, please give the user an option * to turn it off and use a normal notification, as this can be extremely * disruptive. */ public PendingIntent fullScreenIntent; /** * Text to scroll across the screen when this item is added to * the status bar. */ public CharSequence tickerText; /** * The view that will represent this notification in the expanded status bar. */ public RemoteViews contentView; /** * If the icon in the status bar is to have more than one level, you can set this. Otherwise, * leave it at its default value of 0. * * @see android.widget.ImageView#setImageLevel * @see android.graphics.drawable#setLevel */ public int iconLevel; /** * The sound to play. * * <p> * To play the default notification sound, see {@link #defaults}. * </p> */ public Uri sound; /** * Use this constant as the value for audioStreamType to request that * the default stream type for notifications be used. Currently the * default stream type is STREAM_RING. */ public staticfinalint STREAM_DEFAULT = -1; /** * The audio stream type to use when playing the sound. * Should be one of the STREAM_ constants from * {@link android.media.AudioManager}. */ public int audioStreamType = STREAM_DEFAULT; /** * The pattern with which to vibrate. * * <p> * To vibrate the default pattern, see {@link #defaults}. * </p> * * @see android.os.Vibrator#vibrate(long[],int) */ public long[] vibrate; /** * The color of the led. The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledARGB; /** * The number of milliseconds for the LED to be on while it's flashing. * The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledOnMS; /** * The number of milliseconds for the LED to be off while it's flashing. * The hardware will do its best approximation. * * @see #FLAG_SHOW_LIGHTS * @see #flags */ public int ledOffMS; /** * Specifies which values should be taken from the defaults. * <p> * To set, OR the desired from {@link #DEFAULT_SOUND}, * {@link #DEFAULT_VIBRATE}, {@link #DEFAULT_LIGHTS}. For all default * values, use {@link #DEFAULT_ALL}. * </p> */ public int defaults; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if you want the LED on for this notification. * <ul> * <li>To turn the LED off, pass 0 in the alpha channel for colorARGB * or 0 for both ledOnMS and ledOffMS.</li> * <li>To turn the LED on, pass 1 for ledOnMS and 0 for ledOffMS.</li> * <li>To flash the LED, pass the number of milliseconds that it should * be on and off to ledOnMS and ledOffMS.</li> * </ul> * <p> * Since hardware varies, you are not guaranteed that any of the values * you pass are honored exactly. Use the system defaults (TODO) if possible * because they will be set to values that work on any given hardware. * <p> * The alpha channel must be set for forward compatibility. * */ public staticfinalint FLAG_SHOW_LIGHTS =0x00000001; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if this notification is in reference to something that is ongoing, * like a phone call. It should not be set if this notification is in * reference to something that happened at a particular point in time, * like a missed phone call. */ public staticfinalint FLAG_ONGOING_EVENT =0x00000002; /** * Bit to be bitwise-ored into the {@link #flags} field that if set, * the audio will be repeated until the notification is * cancelled or the notification window is opened. */ public staticfinalint FLAG_INSISTENT =0x00000004; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if you want the sound and/or vibration play each time the * notification is sent, even if it has not been canceled before that. */ public staticfinalint FLAG_ONLY_ALERT_ONCE =0x00000008; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if the notification should be canceled when it is clicked by the * user. */ public staticfinalint FLAG_AUTO_CANCEL =0x00000010; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if the notification should not be canceled when the user clicks * the Clear all button. */ public staticfinalint FLAG_NO_CLEAR =0x00000020; /** * Bit to be bitwise-ored into the {@link #flags} field that should be * set if this notification represents a currently running service. This * will normally be set for you by {@link Service#startForeground}. */ public staticfinalint FLAG_FOREGROUND_SERVICE =0x00000040; public int flags; /** * Constructs a Notification object with everything set to 0. */ public Notification() { this.when = System.currentTimeMillis(); } /** * @deprecated use {@link #Notification(int,CharSequence,long)} and {@link #setLatestEventInfo}. * @hide */ public Notification(Context context,int icon, CharSequence tickerText,long when, CharSequence contentTitle, CharSequence contentText, Intent contentIntent) { this.when = when; this.icon = icon; this.tickerText = tickerText; setLatestEventInfo(context, contentTitle, contentText, PendingIntent.getActivity(context, 0, contentIntent, 0)); } /** * Constructs a Notification object with the information needed to * have a status bar icon without the standard expanded view. * * @param icon The resource id of the icon to put in the status bar. * @param tickerText The text that flows by in the status bar when the notification first * activates. * @param when The time to show in the time field. In the System.currentTimeMillis * timebase. */ public Notification(int icon, CharSequence tickerText,long when) { this.icon = icon; this.tickerText = tickerText; this.when = when; } /** * Unflatten the notification from a parcel. */ public Notification(Parcel parcel) { int version = parcel.readInt(); when = parcel.readLong(); icon = parcel.readInt(); number = parcel.readInt(); if (parcel.readInt() !=0) { contentIntent = PendingIntent.CREATOR.createFromParcel(parcel); } if (parcel.readInt() != 0) { deleteIntent = PendingIntent.CREATOR.createFromParcel(parcel); } if (parcel.readInt() !=0) { tickerText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); } if (parcel.readInt() != 0) { contentView = RemoteViews.CREATOR.createFromParcel(parcel); } defaults = parcel.readInt(); flags = parcel.readInt(); if (parcel.readInt() !=0) { sound = Uri.CREATOR.createFromParcel(parcel); } audioStreamType = parcel.readInt(); vibrate = parcel.createLongArray(); ledARGB = parcel.readInt(); ledOnMS = parcel.readInt(); ledOffMS = parcel.readInt(); iconLevel = parcel.readInt(); if (parcel.readInt() != 0) { fullScreenIntent = PendingIntent.CREATOR.createFromParcel(parcel); } } public Notification clone() { Notification that = new Notification(); that.when = this.when; that.icon = this.icon; that.number = this.number; // PendingIntents are global, so there's no reason (or way) to clone them. that.contentIntent = this.contentIntent; that.deleteIntent = this.deleteIntent; that.fullScreenIntent = this.fullScreenIntent; if (this.tickerText !=null) { that.tickerText = this.tickerText.toString(); } if (this.contentView !=null) { that.contentView = this.contentView.clone(); } that.iconLevel = that.iconLevel; that.sound = this.sound; // android.net.Uri is immutable that.audioStreamType = this.audioStreamType; final long[] vibrate =this.vibrate; if (vibrate != null) { final int N = vibrate.length; final long[] vib = that.vibrate =newlong[N]; System.arraycopy(vibrate, 0, vib, 0, N); } that.ledARGB = this.ledARGB; that.ledOnMS = this.ledOnMS; that.ledOffMS = this.ledOffMS; that.defaults = this.defaults; that.flags = this.flags; return that; } public int describeContents() { return 0; } /** * Flatten this notification from a parcel. */ public void writeToParcel(Parcel parcel,int flags) { parcel.writeInt(1); parcel.writeLong(when); parcel.writeInt(icon); parcel.writeInt(number); if (contentIntent != null) { parcel.writeInt(1); contentIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } if (deleteIntent != null) { parcel.writeInt(1); deleteIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } if (tickerText != null) { parcel.writeInt(1); TextUtils.writeToParcel(tickerText, parcel, flags); } else { parcel.writeInt(0); } if (contentView != null) { parcel.writeInt(1); contentView.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } parcel.writeInt(defaults); parcel.writeInt(this.flags); if (sound != null) { parcel.writeInt(1); sound.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } parcel.writeInt(audioStreamType); parcel.writeLongArray(vibrate); parcel.writeInt(ledARGB); parcel.writeInt(ledOnMS); parcel.writeInt(ledOffMS); parcel.writeInt(iconLevel); if (fullScreenIntent !=null) { parcel.writeInt(1); fullScreenIntent.writeToParcel(parcel, 0); } else { parcel.writeInt(0); } } /** * Parcelable.Creator that instantiates Notification objects */ public staticfinal Parcelable.Creator<Notification> CREATOR = new Parcelable.Creator<Notification>() { public Notification createFromParcel(Parcel parcel) { return new Notification(parcel); } public Notification[] newArray(int size) { return new Notification[size]; } }; /** * Sets the {@link #contentView} field to be a view with the standard "Latest Event" * layout. * * <p>Uses the {@link #icon} and {@link #when} fields to set the icon and time fields * in the view.</p> * @param context The context for your application / activity. * @param contentTitle The title that goes in the expanded entry. * @param contentText The text that goes in the expanded entry. * @param contentIntent The intent to launch when the user clicks the expanded notification. * If this is an activity, it must include the * {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires * that you take care of task management as described in * <a href="{@docRoot}guide/topics/fundamentals.html#lcycles">Application Fundamentals: Activities and Tasks</a>. */ public void setLatestEventInfo(Context context, CharSequence contentTitle, CharSequence contentText, PendingIntent contentIntent) { RemoteViews contentView = new RemoteViews(context.getPackageName(), com.android.internal.R.layout.status_bar_latest_event_content); if (this.icon !=0) { contentView.setImageViewResource(com.android.internal.R.id.icon,this.icon); } if (contentTitle != null) { contentView.setTextViewText(com.android.internal.R.id.title, contentTitle); } if (contentText !=null) { contentView.setTextViewText(com.android.internal.R.id.text, contentText); } if (this.when !=0) { contentView.setLong(com.android.internal.R.id.time,"setTime", when); } this.contentView = contentView; this.contentIntent = contentIntent; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("Notification(vibrate="); if (this.vibrate !=null) { int N = this.vibrate.length-1; sb.append("["); for (int i=0; i<N; i++) { sb.append(this.vibrate[i]); sb.append(','); } if (N != -1) { sb.append(this.vibrate[N]); } sb.append("]"); } else if ((this.defaults & DEFAULT_VIBRATE) !=0) { sb.append("default"); } else { sb.append("null"); } sb.append(",sound="); if (this.sound !=null) { sb.append(this.sound.toString()); } else if ((this.defaults & DEFAULT_SOUND) !=0) { sb.append("default"); } else { sb.append("null"); } sb.append(",defaults=0x"); sb.append(Integer.toHexString(this.defaults)); sb.append(",flags=0x"); sb.append(Integer.toHexString(this.flags)); sb.append(")"); return sb.toString(); } } 在344行， sound = Uri.CREATOR.createFromParcel(parcel);回来经过打log发现，问题的关键不再这个类中。
再次，改变方向，换条思路走，找notification的服务类，看有什么新的发现，在framework/base/services/java/com/android/server/NotificationManagerService.java类中，真的找到了我需要的，/** Copyright (C) 2007 The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/ package com.android.server; import com.android.internal.statusbar.StatusBarNotification; import com.android.server.StatusBarManagerService; import android.app.ActivityManagerNative; import android.app.IActivityManager; import android.app.INotificationManager; import android.app.ITransientNotification; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.StatusBarManager; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.ContentResolver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.content.res.Resources; import android.database.ContentObserver; import android.hardware.usb.UsbManager; import android.media.AudioManager; import android.net.Uri; import android.os.BatteryManager; import android.os.Bundle; import android.os.Binder; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Power; import android.os.Process; import android.os.RemoteException; import android.os.SystemProperties; import android.os.Vibrator; import android.os.SystemClock; import android.provider.Settings; import android.telephony.TelephonyManager; import android.text.TextUtils; import android.util.EventLog; import android.util.Slog; import android.util.Log; import android.view.accessibility.AccessibilityEvent; import android.view.accessibility.AccessibilityManager; import android.widget.Toast; import java.io.FileDescriptor; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; /** {@hide} */ public class NotificationManagerServiceextends INotificationManager.Stub { private staticfinal String TAG ="NotificationService"; private staticfinalboolean DBG =false; private staticfinalint MAX_PACKAGE_NOTIFICATIONS =50; private staticfinalint NOTIFICATION_REQUEST_INTERVAL =30000;// 30 seconds private staticfinalint MAX_PACKAGE_NOTIFICATION_REQUESTS =500; // message codes private staticfinalint MESSAGE_TIMEOUT =2; private staticfinalint LONG_DELAY =3500;// 3.5 seconds private staticfinalint SHORT_DELAY =2000;// 2 seconds private staticfinallong[] DEFAULT_VIBRATE_PATTERN = {0,250,250,250}; private staticfinalint DEFAULT_STREAM_TYPE = AudioManager.STREAM_NOTIFICATION; final Context mContext; final IActivityManager mAm; final IBinder mForegroundToken =new Binder(); private WorkerHandler mHandler; private StatusBarManagerService mStatusBar; private LightsService mLightsService; private LightsService.Light mBatteryLight; private LightsService.Light mNotificationLight; private LightsService.Light mAttentionLight; private int mDefaultNotificationColor; private int mDefaultNotificationLedOn; private int mDefaultNotificationLedOff; private NotificationRecord mSoundNotification; private NotificationPlayer mSound; private boolean mSystemReady; private int mDisabledNotifications; private NotificationRecord mVibrateNotification; private Vibrator mVibrator =new Vibrator(); // for enabling and disabling notification pulse behavior private boolean mScreenOn =true; private boolean mInCall =false; private boolean mNotificationPulseEnabled; // This is true if we have received a new notification while the screen is off // (that is, if mLedNotification was set while the screen was off) // This is reset to false when the screen is turned on. private boolean mPendingPulseNotification; // for adb connected notifications private boolean mAdbNotificationShown =false; private Notification mAdbNotification; private final ArrayList<NotificationRecord> mNotificationList = new ArrayList<NotificationRecord>(); private class PackageRequestInfo { int requestCount; long lastPostTime; } private final HashMap<String, PackageRequestInfo> mPackageInfo = new HashMap<String, PackageRequestInfo>(); private ArrayList<ToastRecord> mToastQueue; private ArrayList<NotificationRecord> mLights =new ArrayList<NotificationRecord>(); private boolean mBatteryCharging; private boolean mBatteryLow; private boolean mBatteryFull; private NotificationRecord mLedNotification; private staticfinalint BATTERY_LOW_ARGB =0xFFFF0000;// Charging Low - red solid on private staticfinalint BATTERY_MEDIUM_ARGB =0xFFFFFF00; // Charging - orange solid on private staticfinalint BATTERY_FULL_ARGB =0xFF00FF00;// Charging Full - green solid on private staticfinalint BATTERY_BLINK_ON =125; private staticfinalint BATTERY_BLINK_OFF =2875; private static String idDebugString(Context baseContext, String packageName,int id) { Context c = null; if (packageName !=null) { try { c = baseContext.createPackageContext(packageName,0); } catch (NameNotFoundException e) { c = baseContext; } } else { c = baseContext; } String pkg; String type; String name; Resources r = c.getResources(); try { return r.getResourceName(id); } catch (Resources.NotFoundException e) { return "<name unknown>"; } } private staticfinalclass NotificationRecord { final String pkg; final String tag; final int id; final int uid; final int initialPid; ITransientNotification callback; int duration; final Notification notification; IBinder statusBarKey; NotificationRecord(String pkg, String tag, int id, int uid, int initialPid, Notification notification) { this.pkg = pkg; this.tag = tag; this.id = id; this.uid = uid; this.initialPid = initialPid; this.notification = notification; } void dump(PrintWriter pw, String prefix, Context baseContext) { pw.println(prefix + this); pw.println(prefix + " icon=0x" + Integer.toHexString(notification.icon) + " / " + idDebugString(baseContext,this.pkg, notification.icon)); pw.println(prefix + " contentIntent=" + notification.contentIntent); pw.println(prefix + " deleteIntent=" + notification.deleteIntent); pw.println(prefix + " tickerText=" + notification.tickerText); pw.println(prefix + " contentView=" + notification.contentView); pw.println(prefix + " defaults=0x" + Integer.toHexString(notification.defaults)); pw.println(prefix + " flags=0x" + Integer.toHexString(notification.flags)); pw.println(prefix + " sound=" + notification.sound); pw.println(prefix + " vibrate=" + Arrays.toString(notification.vibrate)); pw.println(prefix + " ledARGB=0x" + Integer.toHexString(notification.ledARGB) + " ledOnMS=" + notification.ledOnMS + " ledOffMS=" + notification.ledOffMS); } @Override public final String toString() { return "NotificationRecord{" + Integer.toHexString(System.identityHashCode(this)) + " pkg=" + pkg + " id=" + Integer.toHexString(id) + " tag=" + tag + "}"; } } private staticfinalclass ToastRecord { final int pid; final String pkg; final ITransientNotification callback; int duration; ToastRecord(int pid, String pkg, ITransientNotification callback,int duration) { this.pid = pid; this.pkg = pkg; this.callback = callback; this.duration = duration; } void update(int duration) { this.duration = duration; } void dump(PrintWriter pw, String prefix) { pw.println(prefix + this); } @Override public final String toString() { return "ToastRecord{" + Integer.toHexString(System.identityHashCode(this)) + " pkg=" + pkg + " callback=" + callback + " duration=" + duration; } } private StatusBarManagerService.NotificationCallbacks mNotificationCallbacks = new StatusBarManagerService.NotificationCallbacks() { public void onSetDisabled(int status) { synchronized (mNotificationList) { mDisabledNotifications = status; if ((mDisabledNotifications & StatusBarManager.DISABLE_NOTIFICATION_ALERTS) !=0) { // cancel whatever's going on long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } } } } public void onClearAll() { cancelAll(); } public void onNotificationClick(String pkg, String tag,int id) { cancelNotification(pkg, tag, id, Notification.FLAG_AUTO_CANCEL, Notification.FLAG_FOREGROUND_SERVICE); } public void onPanelRevealed() { synchronized (mNotificationList) { // sound mSoundNotification = null; long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } // vibrate mVibrateNotification = null; identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } // light mLights.clear(); mLedNotification = null; updateLightsLocked(); } } public void onNotificationError(String pkg, String tag,int id, int uid, int initialPid, String message) { Slog.d(TAG, "onNotification error pkg=" + pkg +" tag=" + tag +" id=" + id + "; will crashApplication(uid=" + uid +", pid=" + initialPid +")"); cancelNotification(pkg, tag, id, 0, 0); long ident = Binder.clearCallingIdentity(); try { ActivityManagerNative.getDefault().crashApplication(uid, initialPid, pkg, "Bad notification posted from package " + pkg + ": " + message); } catch (RemoteException e) { } Binder.restoreCallingIdentity(ident); } }; private BroadcastReceiver mIntentReceiver =new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); boolean queryRestart = false; if (action.equals(Intent.ACTION_BATTERY_CHANGED)) { boolean batteryCharging = (intent.getIntExtra("plugged",0) !=0); int level = intent.getIntExtra("level", -1); boolean batteryLow = (level >=0 && level <= Power.LOW_BATTERY_THRESHOLD); int status = intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN); boolean batteryFull = (status == BatteryManager.BATTERY_STATUS_FULL || level >=90); if (batteryCharging != mBatteryCharging || batteryLow != mBatteryLow || batteryFull != mBatteryFull) { mBatteryCharging = batteryCharging; mBatteryLow = batteryLow; mBatteryFull = batteryFull; updateLights(); } } else if (action.equals(UsbManager.ACTION_USB_STATE)) { Bundle extras = intent.getExtras(); boolean usbConnected = extras.getBoolean(UsbManager.USB_CONNECTED); boolean adbEnabled = (UsbManager.USB_FUNCTION_ENABLED.equals( extras.getString(UsbManager.USB_FUNCTION_ADB))); updateAdbNotification(usbConnected && adbEnabled); } else if (action.equals(Intent.ACTION_PACKAGE_REMOVED) || action.equals(Intent.ACTION_PACKAGE_RESTARTED) || (queryRestart=action.equals(Intent.ACTION_QUERY_PACKAGE_RESTART)) || action.equals(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE)) { String pkgList[] = null; if (action.equals(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE)) { pkgList = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST); } else if (queryRestart) { pkgList = intent.getStringArrayExtra(Intent.EXTRA_PACKAGES); } else { Uri uri = intent.getData(); if (uri == null) { return; } String pkgName = uri.getSchemeSpecificPart(); if (pkgName == null) { return; } pkgList = new String[]{pkgName}; } if (pkgList !=null && (pkgList.length >0)) { for (String pkgName : pkgList) { cancelAllNotificationsInt(pkgName, 0, 0, !queryRestart); } } } else if (action.equals(Intent.ACTION_SCREEN_ON)) { mScreenOn = true; updateNotificationPulse(); } else if (action.equals(Intent.ACTION_SCREEN_OFF)) { mScreenOn = false; updateNotificationPulse(); } else if (action.equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)) { mInCall = (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_OFFHOOK)); updateNotificationPulse(); } } }; class SettingsObserverextends ContentObserver { SettingsObserver(Handler handler) { super(handler); } void observe() { ContentResolver resolver = mContext.getContentResolver(); resolver.registerContentObserver(Settings.System.getUriFor( Settings.System.NOTIFICATION_LIGHT_PULSE),false,this); update(); } @Override public void onChange(boolean selfChange) { update(); } public void update() { ContentResolver resolver = mContext.getContentResolver(); boolean pulseEnabled = Settings.System.getInt(resolver, Settings.System.NOTIFICATION_LIGHT_PULSE, 0) != 0; if (mNotificationPulseEnabled != pulseEnabled) { mNotificationPulseEnabled = pulseEnabled; updateNotificationPulse(); } } } NotificationManagerService(Context context, StatusBarManagerService statusBar, LightsService lights) { super(); mContext = context; mLightsService = lights; mAm = ActivityManagerNative.getDefault(); mSound = new NotificationPlayer(TAG); mSound.setUsesWakeLock(context); mToastQueue = new ArrayList<ToastRecord>(); mHandler = new WorkerHandler(); mStatusBar = statusBar; statusBar.setNotificationCallbacks(mNotificationCallbacks); mBatteryLight = lights.getLight(LightsService.LIGHT_ID_BATTERY); mNotificationLight = lights.getLight(LightsService.LIGHT_ID_NOTIFICATIONS); mAttentionLight = lights.getLight(LightsService.LIGHT_ID_ATTENTION); Resources resources = mContext.getResources(); mDefaultNotificationColor = resources.getColor( com.android.internal.R.color.config_defaultNotificationColor); mDefaultNotificationLedOn = resources.getInteger( com.android.internal.R.integer.config_defaultNotificationLedOn); mDefaultNotificationLedOff = resources.getInteger( com.android.internal.R.integer.config_defaultNotificationLedOff); // Don't start allowing notifications until the setup wizard has run once. // After that, including subsequent boots, init with notifications turned on. // This works on the first boot because the setup wizard will toggle this // flag at least once and we'll go back to 0 after that. if (0 == Settings.Secure.getInt(mContext.getContentResolver(), Settings.Secure.DEVICE_PROVISIONED, 0)) { mDisabledNotifications = StatusBarManager.DISABLE_NOTIFICATION_ALERTS; } // register for battery changed notifications IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_BATTERY_CHANGED); filter.addAction(UsbManager.ACTION_USB_STATE); filter.addAction(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); filter.addAction(TelephonyManager.ACTION_PHONE_STATE_CHANGED); mContext.registerReceiver(mIntentReceiver, filter); IntentFilter pkgFilter = new IntentFilter(); pkgFilter.addAction(Intent.ACTION_PACKAGE_REMOVED); pkgFilter.addAction(Intent.ACTION_PACKAGE_RESTARTED); pkgFilter.addAction(Intent.ACTION_QUERY_PACKAGE_RESTART); pkgFilter.addDataScheme("package"); mContext.registerReceiver(mIntentReceiver, pkgFilter); IntentFilter sdFilter = new IntentFilter(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE); mContext.registerReceiver(mIntentReceiver, sdFilter); SettingsObserver observer = new SettingsObserver(mHandler); observer.observe(); } void systemReady() { // no beeping until we're basically done booting mSystemReady = true; } // Toasts // ============================================================================ public void enqueueToast(String pkg, ITransientNotification callback,int duration) { if (DBG) Slog.i(TAG, "enqueueToast pkg=" + pkg + " callback=" + callback +" duration=" + duration); if (pkg == null || callback ==null) { Slog.e(TAG, "Not doing toast. pkg=" + pkg +" callback=" + callback); return ; } synchronized (mToastQueue) { int callingPid = Binder.getCallingPid(); long callingId = Binder.clearCallingIdentity(); try { ToastRecord record; int index = indexOfToastLocked(pkg, callback); // If it's already in the queue, we update it in place, we don't // move it to the end of the queue. if (index >=0) { record = mToastQueue.get(index); record.update(duration); } else { // Limit the number of toasts that any given package except the android // package can enqueue. Prevents DOS attacks and deals with leaks. if (!"android".equals(pkg)) { int count = 0; finalint N = mToastQueue.size(); for (int i=0; i<N; i++) { final ToastRecord r = mToastQueue.get(i); if (r.pkg.equals(pkg)) { count++; if (count >= MAX_PACKAGE_NOTIFICATIONS) { Slog.e(TAG, "Package has already posted " + count + " toasts. Not showing more. Package=" + pkg); return; } } } } record = new ToastRecord(callingPid, pkg, callback, duration); mToastQueue.add(record); index = mToastQueue.size() - 1; keepProcessAliveLocked(callingPid); } // If it's at index 0, it's the current toast. It doesn't matter if it's // new or just been updated. Call back and tell it to show itself. // If the callback fails, this will remove it from the list, so don't // assume that it's valid after this. if (index == 0) { showNextToastLocked(); } } finally { Binder.restoreCallingIdentity(callingId); } } } public void cancelToast(String pkg, ITransientNotification callback) { Slog.i(TAG, "cancelToast pkg=" + pkg +" callback=" + callback); if (pkg == null || callback ==null) { Slog.e(TAG, "Not cancelling notification. pkg=" + pkg +" callback=" + callback); return ; } synchronized (mToastQueue) { long callingId = Binder.clearCallingIdentity(); try { int index = indexOfToastLocked(pkg, callback); if (index >=0) { cancelToastLocked(index); } else { Slog.w(TAG, "Toast already cancelled. pkg=" + pkg +" callback=" + callback); } } finally { Binder.restoreCallingIdentity(callingId); } } } private void showNextToastLocked() { ToastRecord record = mToastQueue.get(0); while (record != null) { if (DBG) Slog.d(TAG,"Show pkg=" + record.pkg +" callback=" + record.callback); try { record.callback.show(); scheduleTimeoutLocked(record, false); return; } catch (RemoteException e) { Slog.w(TAG, "Object died trying to show notification " + record.callback + " in package " + record.pkg); // remove it from the list and let the process die int index = mToastQueue.indexOf(record); if (index >=0) { mToastQueue.remove(index); } keepProcessAliveLocked(record.pid); if (mToastQueue.size() >0) { record = mToastQueue.get(0); } else { record = null; } } } } private void cancelToastLocked(int index) { ToastRecord record = mToastQueue.get(index); try { record.callback.hide(); } catch (RemoteException e) { Slog.w(TAG, "Object died trying to hide notification " + record.callback + " in package " + record.pkg); // don't worry about this, we're about to remove it from // the list anyway } mToastQueue.remove(index); keepProcessAliveLocked(record.pid); if (mToastQueue.size() > 0) { // Show the next one. If the callback fails, this will remove // it from the list, so don't assume that the list hasn't changed // after this point. showNextToastLocked(); } } private void scheduleTimeoutLocked(ToastRecord r,boolean immediate) { Message m = Message.obtain(mHandler, MESSAGE_TIMEOUT, r); long delay = immediate ?0 : (r.duration == Toast.LENGTH_LONG ? LONG_DELAY : SHORT_DELAY); mHandler.removeCallbacksAndMessages(r); mHandler.sendMessageDelayed(m, delay); } private void handleTimeout(ToastRecord record) { if (DBG) Slog.d(TAG, "Timeout pkg=" + record.pkg + " callback=" + record.callback); synchronized (mToastQueue) { int index = indexOfToastLocked(record.pkg, record.callback); if (index >=0) { cancelToastLocked(index); } } } // lock on mToastQueue private int indexOfToastLocked(String pkg, ITransientNotification callback) { IBinder cbak = callback.asBinder(); ArrayList<ToastRecord> list = mToastQueue; int len = list.size(); for (int i=0; i<len; i++) { ToastRecord r = list.get(i); if (r.pkg.equals(pkg) && r.callback.asBinder() == cbak) { return i; } } return -1; } // lock on mToastQueue private void keepProcessAliveLocked(int pid) { int toastCount =0;// toasts from this pid ArrayList<ToastRecord> list = mToastQueue; int N = list.size(); for (int i=0; i<N; i++) { ToastRecord r = list.get(i); if (r.pid == pid) { toastCount++; } } try { mAm.setProcessForeground(mForegroundToken, pid, toastCount >0); } catch (RemoteException e) { // Shouldn't happen. } } private finalclass WorkerHandlerextends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case MESSAGE_TIMEOUT: handleTimeout((ToastRecord)msg.obj); break; } } } // Notifications // ============================================================================ public void enqueueNotification(String pkg,int id, Notification notification,int[] idOut) { enqueueNotificationWithTag(pkg, null/* tag */, id, notification, idOut); } public void enqueueNotificationWithTag(String pkg, String tag,int id, Notification notification, int[] idOut) { enqueueNotificationInternal(pkg, Binder.getCallingUid(), Binder.getCallingPid(), tag, id, notification, idOut); } // Not exposed via Binder; for system use only (otherwise malicious apps could spoof the // uid/pid of another application) public void enqueueNotificationInternal(String pkg,int callingUid,int callingPid, String tag, int id, Notification notification,int[] idOut) { checkIncomingCall(pkg); // Limit the number of notifications that any given package except the android // package can enqueue. Prevents DOS attacks and deals with leaks. if (!"android".equals(pkg)) { synchronized (mNotificationList) { int count =0; final int N = mNotificationList.size(); for (int i=0; i<N; i++) { final NotificationRecord r = mNotificationList.get(i); if (r.pkg.equals(pkg)) { count++; if (count >= MAX_PACKAGE_NOTIFICATIONS) { Slog.e(TAG, "Package has already posted " + count + " notifications. Not showing more. package=" + pkg); return; } } } } } // Limit the number of notification requests, notify and cancel that // a package can post. The MAX_PACKAGE_NOTIFICATIONS doesn't work for // packages which notify and quickly cancel it and do this in an // iteration if (!"android".equals(pkg)) { synchronized (mPackageInfo) { if (!mPackageInfo.containsKey(pkg)) { final PackageRequestInfo pInfo =new PackageRequestInfo(); pInfo.requestCount = 1; pInfo.lastPostTime = SystemClock.elapsedRealtime(); mPackageInfo.put(pkg,pInfo); } else { final PackageRequestInfo pInfo = mPackageInfo.get(pkg); finallong currentTime = SystemClock.elapsedRealtime(); if ((currentTime - pInfo.lastPostTime) <= NOTIFICATION_REQUEST_INTERVAL) { // Keep track of requests posted within last 30 seconds pInfo.requestCount++; } else { pInfo.requestCount = 1; pInfo.lastPostTime = SystemClock.elapsedRealtime(); } if (pInfo.requestCount >= MAX_PACKAGE_NOTIFICATION_REQUESTS) { // 500 requests within a span of 30 seconds is high if (pInfo.requestCount%MAX_PACKAGE_NOTIFICATION_REQUESTS ==0) { Slog.e(TAG, "Package has already posted too many notifications. " + "Not showing more. package=" + pkg); } return; } } } } // This conditional is a dirty hack to limit the logging done on // behalf of the download manager without affecting other apps. if (!pkg.equals("com.android.providers.downloads") || Log.isLoggable("DownloadManager", Log.VERBOSE)) { EventLog.writeEvent(EventLogTags.NOTIFICATION_ENQUEUE, pkg, id, notification.toString()); } if (pkg == null || notification ==null) { throw new IllegalArgumentException("null not allowed: pkg=" + pkg + " id=" + id + " notification=" + notification); } if (notification.icon != 0) { if (notification.contentView ==null) { throw new IllegalArgumentException("contentView required: pkg=" + pkg + " id=" + id +" notification=" + notification); } if (notification.contentIntent ==null) { throw new IllegalArgumentException("contentIntent required: pkg=" + pkg + " id=" + id +" notification=" + notification); } } synchronized (mNotificationList) { NotificationRecord r = new NotificationRecord(pkg, tag, id, callingUid, callingPid, notification); NotificationRecord old = null; int index = indexOfNotificationLocked(pkg, tag, id); if (index < 0) { mNotificationList.add(r); } else { old = mNotificationList.remove(index); mNotificationList.add(index, r); // Make sure we don't lose the foreground service state. if (old !=null) { notification.flags |= old.notification.flags&Notification.FLAG_FOREGROUND_SERVICE; } } // Ensure if this is a foreground service that the proper additional // flags are set. if ((notification.flags&Notification.FLAG_FOREGROUND_SERVICE) !=0) { notification.flags |= Notification.FLAG_ONGOING_EVENT | Notification.FLAG_NO_CLEAR; } if (notification.icon !=0) { StatusBarNotification n = new StatusBarNotification(pkg, id, tag, r.uid, r.initialPid, notification); if (old !=null && old.statusBarKey !=null) { r.statusBarKey = old.statusBarKey; long identity = Binder.clearCallingIdentity(); try { mStatusBar.updateNotification(r.statusBarKey, n); } finally { Binder.restoreCallingIdentity(identity); } } else { long identity = Binder.clearCallingIdentity(); try { r.statusBarKey = mStatusBar.addNotification(n); mAttentionLight.pulse(); } finally { Binder.restoreCallingIdentity(identity); } } sendAccessibilityEvent(notification, pkg); } else { if (old != null && old.statusBarKey !=null) { long identity = Binder.clearCallingIdentity(); try { mStatusBar.removeNotification(old.statusBarKey); } finally { Binder.restoreCallingIdentity(identity); } } } // If we're not supposed to beep, vibrate, etc. then don't. if (((mDisabledNotifications & StatusBarManager.DISABLE_NOTIFICATION_ALERTS) ==0) && (!(old != null && (notification.flags & Notification.FLAG_ONLY_ALERT_ONCE) !=0 )) && mSystemReady) { final AudioManager audioManager = (AudioManager) mContext .getSystemService(Context.AUDIO_SERVICE); // sound final boolean useDefaultSound = (notification.defaults & Notification.DEFAULT_SOUND) !=0; if (useDefaultSound || notification.sound !=null) { Uri uri; if (useDefaultSound) { uri = Settings.System.DEFAULT_NOTIFICATION_URI; } else { uri = notification.sound; } boolean looping = (notification.flags & Notification.FLAG_INSISTENT) !=0; int audioStreamType; if (notification.audioStreamType >=0) { audioStreamType = notification.audioStreamType; } else { audioStreamType = DEFAULT_STREAM_TYPE; } mSoundNotification = r; // do not play notifications if stream volume is 0 // (typically because ringer mode is silent). if (audioManager.getStreamVolume(audioStreamType) !=0) { long identity = Binder.clearCallingIdentity(); try { mSound.play(mContext, uri, looping, audioStreamType); } finally { Binder.restoreCallingIdentity(identity); } } } // vibrate final boolean useDefaultVibrate = (notification.defaults & Notification.DEFAULT_VIBRATE) !=0; if ((useDefaultVibrate || notification.vibrate !=null) && audioManager.shouldVibrate(AudioManager.VIBRATE_TYPE_NOTIFICATION)) { mVibrateNotification = r; mVibrator.vibrate(useDefaultVibrate ? DEFAULT_VIBRATE_PATTERN : notification.vibrate, ((notification.flags & Notification.FLAG_INSISTENT) !=0) ?0: -1); } } // this option doesn't shut off the lights // light // the most recent thing gets the light mLights.remove(old); if (mLedNotification == old) { mLedNotification = null; } //Slog.i(TAG, "notification.lights=" // + ((old.notification.lights.flags & Notification.FLAG_SHOW_LIGHTS) != 0)); if ((notification.flags & Notification.FLAG_SHOW_LIGHTS) !=0) { mLights.add(r); updateLightsLocked(); } else { if (old !=null && ((old.notification.flags & Notification.FLAG_SHOW_LIGHTS) !=0)) { updateLightsLocked(); } } } idOut[0] = id; } private void sendAccessibilityEvent(Notification notification, CharSequence packageName) { AccessibilityManager manager = AccessibilityManager.getInstance(mContext); if (!manager.isEnabled()) { return; } AccessibilityEvent event = AccessibilityEvent.obtain(AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED); event.setPackageName(packageName); event.setClassName(Notification.class.getName()); event.setParcelableData(notification); CharSequence tickerText = notification.tickerText; if (!TextUtils.isEmpty(tickerText)) { event.getText().add(tickerText); } manager.sendAccessibilityEvent(event); } private void cancelNotificationLocked(NotificationRecord r) { // status bar if (r.notification.icon != 0) { long identity = Binder.clearCallingIdentity(); try { mStatusBar.removeNotification(r.statusBarKey); } finally { Binder.restoreCallingIdentity(identity); } r.statusBarKey = null; } // sound if (mSoundNotification == r) { mSoundNotification = null; long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } } // vibrate if (mVibrateNotification == r) { mVibrateNotification = null; long identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } } // light mLights.remove(r); if (mLedNotification == r) { mLedNotification = null; } } /** * Cancels a notification ONLY if it has all of the {@code mustHaveFlags} * and none of the {@code mustNotHaveFlags}. */ private void cancelNotification(String pkg, String tag,int id,int mustHaveFlags, int mustNotHaveFlags) { EventLog.writeEvent(EventLogTags.NOTIFICATION_CANCEL, pkg, id, mustHaveFlags); synchronized (mNotificationList) { int index = indexOfNotificationLocked(pkg, tag, id); if (index >= 0) { NotificationRecord r = mNotificationList.get(index); if ((r.notification.flags & mustHaveFlags) != mustHaveFlags) { return; } if ((r.notification.flags & mustNotHaveFlags) !=0) { return; } mNotificationList.remove(index); cancelNotificationLocked(r); updateLightsLocked(); } } } /** * Cancels all notifications from a given package that have all of the * {@code mustHaveFlags}. */ boolean cancelAllNotificationsInt(String pkg,int mustHaveFlags, int mustNotHaveFlags,boolean doit) { EventLog.writeEvent(EventLogTags.NOTIFICATION_CANCEL_ALL, pkg, mustHaveFlags); synchronized (mNotificationList) { final int N = mNotificationList.size(); boolean canceledSomething =false; for (int i = N-1; i >=0; --i) { NotificationRecord r = mNotificationList.get(i); if ((r.notification.flags & mustHaveFlags) != mustHaveFlags) { continue; } if ((r.notification.flags & mustNotHaveFlags) !=0) { continue; } if (!r.pkg.equals(pkg)) { continue; } canceledSomething = true; if (!doit) { return true; } mNotificationList.remove(i); cancelNotificationLocked(r); } if (canceledSomething) { updateLightsLocked(); } return canceledSomething; } } public void cancelNotification(String pkg,int id) { cancelNotificationWithTag(pkg, null/* tag */, id); } public void cancelNotificationWithTag(String pkg, String tag,int id) { checkIncomingCall(pkg); // Limit the number of notification requests, notify and cancel that // a package can post. The MAX_PACKAGE_NOTIFICATIONS doesn't work for // packages which notify and quickly cancel it and do this in an // iteration synchronized (mPackageInfo) { if (!"android".equals(pkg) && mPackageInfo.containsKey(pkg)) { final PackageRequestInfo pInfo = mPackageInfo.get(pkg); final long currentTime = SystemClock.elapsedRealtime(); if ((currentTime - pInfo.lastPostTime) <= NOTIFICATION_REQUEST_INTERVAL) { // Keep track of requests posted within last 30 seconds pInfo.requestCount++; } else { pInfo.requestCount = 1; pInfo.lastPostTime = SystemClock.elapsedRealtime(); } } } // Don't allow client applications to cancel foreground service notis. cancelNotification(pkg, tag, id, 0, Binder.getCallingUid() == Process.SYSTEM_UID ? 0 : Notification.FLAG_FOREGROUND_SERVICE); } public void cancelAllNotifications(String pkg) { checkIncomingCall(pkg); // Calling from user space, don't allow the canceling of actively // running foreground services. cancelAllNotificationsInt(pkg, 0, Notification.FLAG_FOREGROUND_SERVICE,true); } void checkIncomingCall(String pkg) { int uid = Binder.getCallingUid(); if (uid == Process.SYSTEM_UID || uid ==0) { return; } try { ApplicationInfo ai = mContext.getPackageManager().getApplicationInfo( pkg, 0); if (ai.uid != uid) { throw new SecurityException("Calling uid " + uid +" gave package" + pkg + " which is owned by uid " + ai.uid); } } catch (PackageManager.NameNotFoundException e) { throw new SecurityException("Unknown package " + pkg); } } void cancelAll() { synchronized (mNotificationList) { final int N = mNotificationList.size(); for (int i=N-1; i>=0; i--) { NotificationRecord r = mNotificationList.get(i); if ((r.notification.flags & (Notification.FLAG_ONGOING_EVENT | Notification.FLAG_NO_CLEAR)) ==0) { if (r.notification.deleteIntent !=null) { try { r.notification.deleteIntent.send(); } catch (PendingIntent.CanceledException ex) { // do nothing - there's no relevant way to recover, and // no reason to let this propagate Slog.w(TAG, "canceled PendingIntent for " + r.pkg, ex); } } mNotificationList.remove(i); cancelNotificationLocked(r); } } updateLightsLocked(); } } private void updateLights() { synchronized (mNotificationList) { updateLightsLocked(); } } // lock on mNotificationList private void updateLightsLocked() { // Battery low always shows, other states only show if charging. if (mBatteryLow) { if (mBatteryCharging) { mBatteryLight.setColor(BATTERY_LOW_ARGB); } else { // Flash when battery is low and not charging mBatteryLight.setFlashing(BATTERY_LOW_ARGB, LightsService.LIGHT_FLASH_TIMED, BATTERY_BLINK_ON, BATTERY_BLINK_OFF); } } else if (mBatteryCharging) { if (mBatteryFull) { mBatteryLight.setColor(BATTERY_FULL_ARGB); } else { mBatteryLight.setColor(BATTERY_MEDIUM_ARGB); } } else { mBatteryLight.turnOff(); } // clear pending pulse notification if screen is on if (mScreenOn || mLedNotification ==null) { mPendingPulseNotification = false; } // handle notification lights if (mLedNotification == null) { // get next notification, if any int n = mLights.size(); if (n > 0) { mLedNotification = mLights.get(n-1); } if (mLedNotification != null && !mScreenOn) { mPendingPulseNotification = true; } } // we only flash if screen is off and persistent pulsing is enabled // and we are not currently in a call if (!mPendingPulseNotification || mScreenOn || mInCall) { mNotificationLight.turnOff(); } else { int ledARGB = mLedNotification.notification.ledARGB; int ledOnMS = mLedNotification.notification.ledOnMS; int ledOffMS = mLedNotification.notification.ledOffMS; if ((mLedNotification.notification.defaults & Notification.DEFAULT_LIGHTS) !=0) { ledARGB = mDefaultNotificationColor; ledOnMS = mDefaultNotificationLedOn; ledOffMS = mDefaultNotificationLedOff; } if (mNotificationPulseEnabled) { // pulse repeatedly mNotificationLight.setFlashing(ledARGB, LightsService.LIGHT_FLASH_TIMED, ledOnMS, ledOffMS); } else { // pulse only once mNotificationLight.pulse(ledARGB, ledOnMS); } } } // lock on mNotificationList private int indexOfNotificationLocked(String pkg, String tag,int id) { ArrayList<NotificationRecord> list = mNotificationList; final int len = list.size(); for (int i=0; i<len; i++) { NotificationRecord r = list.get(i); if (tag == null) { if (r.tag !=null) { continue; } } else { if (!tag.equals(r.tag)) { continue; } } if (r.id == id && r.pkg.equals(pkg)) { return i; } } return -1; } // This is here instead of StatusBarPolicy because it is an important // security feature that we don't want people customizing the platform // to accidentally lose. private void updateAdbNotification(boolean adbEnabled) { if (adbEnabled) { if ("0".equals(SystemProperties.get("persist.adb.notify"))) { return; } if (!mAdbNotificationShown) { NotificationManager notificationManager = (NotificationManager) mContext .getSystemService(Context.NOTIFICATION_SERVICE); if (notificationManager !=null) { Resources r = mContext.getResources(); CharSequence title = r.getText( com.android.internal.R.string.adb_active_notification_title); CharSequence message = r.getText( com.android.internal.R.string.adb_active_notification_message); if (mAdbNotification ==null) { mAdbNotification = new Notification(); mAdbNotification.icon = com.android.internal.R.drawable.stat_sys_adb; mAdbNotification.when = 0; mAdbNotification.flags = Notification.FLAG_ONGOING_EVENT; mAdbNotification.tickerText = title; mAdbNotification.defaults = 0; // please be quiet mAdbNotification.sound = null; mAdbNotification.vibrate = null; } Intent intent = new Intent( Settings.ACTION_APPLICATION_DEVELOPMENT_SETTINGS); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED); // Note: we are hard-coding the component because this is // an important security UI that we don't want anyone // intercepting. intent.setComponent(new ComponentName("com.android.settings", "com.android.settings.DevelopmentSettings")); PendingIntent pi = PendingIntent.getActivity(mContext,0, intent, 0); mAdbNotification.setLatestEventInfo(mContext, title, message, pi); mAdbNotificationShown = true; notificationManager.notify( com.android.internal.R.string.adb_active_notification_title, mAdbNotification); } } } else if (mAdbNotificationShown) { NotificationManager notificationManager = (NotificationManager) mContext .getSystemService(Context.NOTIFICATION_SERVICE); if (notificationManager !=null) { mAdbNotificationShown = false; notificationManager.cancel( com.android.internal.R.string.adb_active_notification_title); } } } private void updateNotificationPulse() { synchronized (mNotificationList) { updateLightsLocked(); } } // ====================================================================== @Override protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { pw.println("Permission Denial: can't dump NotificationManager from from pid=" + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()); return; } pw.println("Current Notification Manager state:"); int N; synchronized (mToastQueue) { N = mToastQueue.size(); if (N > 0) { pw.println(" Toast Queue:"); for (int i=0; i<N; i++) { mToastQueue.get(i).dump(pw, " "); } pw.println(" "); } } synchronized (mNotificationList) { N = mNotificationList.size(); if (N > 0) { pw.println(" Notification List:"); for (int i=0; i<N; i++) { mNotificationList.get(i).dump(pw, " ", mContext); } pw.println(" "); } N = mLights.size(); if (N > 0) { pw.println(" Lights List:"); for (int i=0; i<N; i++) { mLights.get(i).dump(pw, " ", mContext); } pw.println(" "); } pw.println(" mSoundNotification=" + mSoundNotification); pw.println(" mSound=" + mSound); pw.println(" mVibrateNotification=" + mVibrateNotification); pw.println(" mDisabledNotifications=0x" + Integer.toHexString(mDisabledNotifications)); pw.println(" mSystemReady=" + mSystemReady); } } } 在871行有这句代码：uri = notification.sound;在886行有这句代码：mSound.play(mContext, uri, looping, audioStreamType);当时我就有点兴奋了，感觉这就是问题的关键，然后打log，发现这就是问题的关键，当notification正常发声音的时候，这个886行的代码走进来了，不发声音的时候这个代码没有走进来，所以我离问题的根源又进了一步。最后发现是包着这段代码的if语句中的判断引起的，所以我把if语句中的代码都打印出来，发现是mDisabledNotifications这个变量引起的，我就追踪这个mDisabledNotifications变量值的变化的地方。发现在467行有这段代码
// Don't start allowing notifications until the setup wizard has run once. // After that, including subsequent boots, init with notifications turned on. // This works on the first boot because the setup wizard will toggle this // flag at least once and we'll go back to 0 after that. if (0 == Settings.Secure.getInt(mContext.getContentResolver(), Settings.Secure.DEVICE_PROVISIONED, 0)) { mDisabledNotifications = StatusBarManager.DISABLE_NOTIFICATION_ALERTS; } 研究以上的注释，发现原来google故意这么设置的，至于google为什么要这么设置，我没有深究，暂时没有想明白，但是这个这个初始化的时候必须要tsetup wizard （设置向导）运行一次，所以导致了值不对，所以这个notification就不响了。
在264行有这段代码对mDisabledNotification进行改变的：
private StatusBarManagerService.NotificationCallbacks mNotificationCallbacks = new StatusBarManagerService.NotificationCallbacks() { public void onSetDisabled(int status) { synchronized (mNotificationList) { mDisabledNotifications = status; if ((mDisabledNotifications & StatusBarManager.DISABLE_NOTIFICATION_ALERTS) !=0) { // cancel whatever's going on long identity = Binder.clearCallingIdentity(); try { mSound.stop(); } finally { Binder.restoreCallingIdentity(identity); } identity = Binder.clearCallingIdentity(); try { mVibrator.cancel(); } finally { Binder.restoreCallingIdentity(identity); } } } } 找到问题的根源了，太兴奋了，这个问题断断续续困扰了我3周，终于经过我3天地认真分析，把问题的根源找到了，要想解决就很简单了，可以在初始化的时候直接赋值为0就ok了！ 最后、886行mSound.play(mContext, uri, looping, audioStreamType);是NotificationPlayer类中的一个方法，在play（）方法中有一个线程， mThread = new CmdThread(); mThread.start();线程中的run方法中有：case PLAY：startSound(cmd);在startSound（）方法中又有一个线程： mCompletionThread = new CreationAndCompletionThread(cmd);mCompletionThread = new CreationAndCompletionThread(cmd); synchronized(mCompletionThread) { mCompletionThread.start(); mCompletionThread.wait(); } 在这个线程类中的run方法中：在这个线程中进行播放音乐的 ，真正的发声音也是通过Mediapaly来实现的：
publicvoid run() { Looper.prepare(); mLooper = Looper.myLooper(); synchronized(this) { AudioManager audioManager = (AudioManager) mCmd.context.getSystemService(Context.AUDIO_SERVICE); try { MediaPlayer player = new MediaPlayer(); player.setAudioStreamType(mCmd.stream); player.setDataSource(mCmd.context, mCmd.uri); player.setLooping(mCmd.looping); player.prepare(); if ((mCmd.uri !=null) && (mCmd.uri.getEncodedPath() !=null) && (mCmd.uri.getEncodedPath().length() > 0)) { if (mCmd.looping) { audioManager.requestAudioFocus(null, mCmd.stream, AudioManager.AUDIOFOCUS_GAIN); } else { audioManager.requestAudioFocus(null, mCmd.stream, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK); } } player.setOnCompletionListener(NotificationPlayer.this); player.start(); if (mPlayer !=null) { mPlayer.release(); } mPlayer = player; } catch (Exception e) { Log.w(mTag, "error loading sound for " + mCmd.uri, e); } mAudioManager = audioManager; this.notify(); } Looper.loop(); }</span> 出处：http://blog.csdn.net/wdaming1986/article/details/7081787
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