Settings-sounds
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<pre name="code" class="java">
<pre name="code" class="javascript">一：直接定位到onCreate（）方法super.onCreate(savedInstanceState);调用了父类的onCreate方法
这个是父类的onCreate方法：super.onCreate(icicle);//还要调父类的方法
int helpResource = getHelpResource();<span style="white-space:pre"></span>if (helpResource != 0) { mHelpUrl = getResources().getString(helpResource); }得出父类也没做啥事继续
ContentResolver resolver = getContentResolver();//是android中存了数据，用contentprovider提供接口，在activity中用此方法获得contentresover对象，来操 int activePhoneType = TelephonyManager.getDefault().getCurrentPhoneType();//调用getDefault()方法获得TelephoneManager类，调用getCurrentPhoneType()<的意思是获得当前phone的类型，GSM/COMA<span style="white-space:pre"></span>TelephonyManager.java这个方法就是 public static TelephonyManager getDefault() { return sInstance; } mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);//这个服务获得系统音量，铃声之类的管理继续<span style="white-space:pre"></span>addPreferencesFromResource(R.xml.sound_settings);//这个方法是加载xml布局的
if (TelephonyManager.PHONE_TYPE_CDMA != activePhoneType) { // device is not CDMA, do not display CDMA emergency_tone getPreferenceScreen().removePreference(findPreference(KEY_EMERGENCY_TONE)); } if (!getResources().getBoolean(R.bool.has_silent_mode)) { findPreference(KEY_RING_VOLUME).setDependency(null); } if (getResources().getBoolean(com.android.internal.R.bool.config_useFixedVolume)) { // device with fixed volume policy, do not display volumes submenu getPreferenceScreen().removePreference(findPreference(KEY_RING_VOLUME)); }//第一个if语句是判断设备不是CDMA，下面findPreference(KEY值)类似与实例化控件，它实例化的是KEY值，移除该控件getResoures()获得资源路径这个方法的意思是在values文件下有一个bool的xml文件，会根据屏幕的尺寸选择用哪个代码优化代码，实例化那个组建，第三个也是移除这个组建的KEY值</pre><pre name="code" class="javascript">mVibrateWhenRinging = (CheckBoxPreference) findPreference(KEY_VIBRATE);//根据KEY值实例化 mVibrateWhenRinging.setPersistent(false); mVibrateWhenRinging.setChecked(Settings.System.getInt(resolver, Settings.System.VIBRATE_WHEN_RINGING, 0) != 0);//在android的framwork层Settings类里面已经存好了设置好的值，根据那个值来判定!=0的boolean来给于选中还是不选中应该是:响铃时震动 mDtmfTone = (CheckBoxPreference) findPreference(KEY_DTMF_TONE); mDtmfTone.setPersistent(false); mDtmfTone.setChecked(Settings.System.getInt(resolver,//拨号键盘触摸音效 Settings.System.DTMF_TONE_WHEN_DIALING, 1) != 0); mSoundEffects = (CheckBoxPreference) findPreference(KEY_SOUND_EFFECTS); mSoundEffects.setPersistent(false); mSoundEffects.setChecked(Settings.System.getInt(resolver,//触摸提示音 Settings.System.SOUND_EFFECTS_ENABLED, 1) != 0); mHapticFeedback = (CheckBoxPreference) findPreference(KEY_HAPTIC_FEEDBACK); mHapticFeedback.setPersistent(false); mHapticFeedback.setChecked(Settings.System.getInt(resolver,//触摸时震动 Settings.System.HAPTIC_FEEDBACK_ENABLED, 1) != 0); mLockSounds = (CheckBoxPreference) findPreference(KEY_LOCK_SOUNDS); mLockSounds.setPersistent(false); mLockSounds.setChecked(Settings.System.getInt(resolver,//锁屏提示音 Settings.System.LOCKSCREEN_SOUNDS_ENABLED, 1) != 0);上面的这四个chekBox都是实例化，然后根据数据库存的东西和Settings设置好的值比较，来给于选中不选中 mRingtonePreference = findPreference(KEY_RINGTONE);//实例化铃声设置 mMultiSimRingtonePreference = findPreference(KEY_MULTISIM_RINGTONE);//实例化多SIM铃声设置
if (MSimTelephonyManager.getDefault().isMultiSimEnabled()) { // getPreferenceScreen().removePreference(mRingtonePreference); mRingtonePreference = null; } else { //if it is not multi sim, remove multi sim ringtone setting, and show ringtone setting getPreferenceScreen().removePreference(mMultiSimRingtonePreference); mMultiSimRingtonePreference = null; }</span>如果支持多SIM卡，删除铃声设置，显示多SIM铃声设置/反之如果不是支持多SIM卡，删除多SIM铃声设置，并显示铃声设置mNotificationPreference = findPreference(KEY_NOTIFICATION_SOUND);</span>通知提示音
class="javascript">Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); if (vibrator == null || !vibrator.hasVibrator()) { removePreference(KEY_VIBRATE); removePreference(KEY_HAPTIC_FEEDBACK); }//如果震动服务为null或者，不能开启，移除响铃时震动控件的KEY和，触摸时震动的KEYif (TelephonyManager.PHONE_TYPE_CDMA == activePhoneType) { ListPreference emergencyTonePreference = (ListPreference) findPreference(KEY_EMERGENCY_TONE); emergencyTonePreference.setValue(String.valueOf(Settings.Global.getInt( resolver, Settings.Global.EMERGENCY_TONE, FALLBACK_EMERGENCY_TONE_VALUE))); emergencyTonePreference.setOnPreferenceChangeListener(this); }</span>//如果是CDMA设备实例化控件，从数据库中的数据给他设置上去，设置单机事件mSoundSettings = (PreferenceGroup) findPreference(KEY_SOUND_SETTINGS);</span>//实例化铃声设置
mMusicFx = mSoundSettings.findPreference(KEY_MUSICFX);</span>
Intent i = new Intent(AudioEffect.ACTION_DISPLAY_AUDIO_EFFECT_CONTROL_PANEL); PackageManager p = getPackageManager(); List<ResolveInfo> ris = p.queryIntentActivities(i, PackageManager.GET_DISABLED_COMPONENTS); if (ris.size() <= 2) { mSoundSettings.removePreference(mMusicFx); }</span>铃声设置控件if (!Utils.isVoiceCapable(getActivity())) { for (String prefKey : NEED_VOICE_CAPABILITY) { Preference pref = findPreference(prefKey); if (pref != null) { getPreferenceScreen().removePreference(pref); } } }</span>一个for循环来删除NEED_VOICE-CAPABILITY里面数据，数据是几个KEY值，相当于移除控件mRingtoneLookupRunnable = new Runnable() { public void run() { if (mRingtonePreference != null) { updateRingtoneName(RingtoneManager.TYPE_RINGTONE, mRingtonePreference, MSG_UPDATE_RINGTONE_SUMMARY); } if (mNotificationPreference != null) { updateRingtoneName(RingtoneManager.TYPE_NOTIFICATION, mNotificationPreference, MSG_UPDATE_NOTIFICATION_SUMMARY); } } };</span>//如果SIM铃声控件部位空，更新铃声名字，因为默认有一个铃声的名字，如果通知提示音控件不为空，默认有一个名字,每次进来要设置，果然是在onResume方法中做的--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
下面是xml文件
-----------------------------------声音设置<pre name="code" class="javascript"><PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" android:title="@string/sound_settings" android:key="sound_settings" xmlns:settings="http://schemas.android.com/apk/res/com.android.settings"> <com.android.settings.RingerVolumePreference android:key="ring_volume" android:title="@string/all_volume_title" android:dialogTitle="@string/all_volume_title" android:persistent="false" android:streamType="ring" /> <Preference android:key="musicfx" android:title="@string/musicfx_title">//铃声 <intent android:targetPackage="com.android.musicfx" android:targetClass="com.android.musicfx.ControlPanelPicker" /> </Preference>--------------------------------------------来电铃声和震动 <PreferenceCategory android:key="category_calls_and_notification" android:title="@string/sound_category_call_ringtone_vibrate_title"/> <!-- Do not nest these, or removals in code will break --> <com.android.settings.DefaultRingtonePreference android:key="ringtone" android:title="@string/ringtone_title" android:dialogTitle="@string/ringtone_title"//来电铃声 android:persistent="false" android:ringtoneType="ringtone" /> <CheckBoxPreference android:key="vibrate_when_ringing" android:title="@string/vibrate_when_ringing_title"//来电震动 android:persistent="false" /> <PreferenceScreen android:key="multisim_ringtone" android:title="@string/ringtone_title" android:persistent="false"> <intent android:action="android.intent.action.MAIN"//多SIM android:targetPackage="com.android.multisimsettings" android:targetClass="com.android.multisimsettings.MultiSimSettingTab"/> </PreferenceScreen>------------------------------------------系统声音 <PreferenceCategory android:title="@string/sound_category_system_title"/> <!-- Do not nest these, or removals in code will break --> <com.android.settings.DefaultRingtonePreference android:key="notification_sound" android:title="@string/notification_sound_title" android:dialogTitle="@string/notification_sound_dialog_title"//默认通知提示音 android:persistent="false" android:ringtoneType="notification" /> <CheckBoxPreference android:key="dtmf_tone" android:title="@string/dtmf_tone_enable_title"//拨号键盘触摸音效 android:defaultValue="true" /> <CheckBoxPreference android:key="sound_effects" android:title="@string/sound_effects_enable_title"//触摸提示音 android:defaultValue="true" /> <CheckBoxPreference android:key="lock_sounds" android:title="@string/lock_sounds_enable_title"//触屏提示音 android:defaultValue="true" /> <CheckBoxPreference android:key="haptic_feedback" android:title="@string/haptic_feedback_enable_title"//触摸时震动 android:defaultValue="true" /> <ListPreference android:key="emergency_tone" android:title="@string/emergency_tone_title" android:entries="@array/emergency_tone_entries" android:entryValues="@array/emergency_tone_values" />-------------------------------dock <!-- Dock --> <PreferenceCategory android:key="dock_category" android:title="@string/dock_settings"/>//设置dock的title的 <!-- Do not nest these, or removals in code will break --> <PreferenceScreen android:key="dock_audio" android:title="@string/dock_audio_settings_title"> <CheckBoxPreference android:title="@string/bluetooth_dock_settings_a2dp" android:key="dock_audio_media_enabled" android:enabled="true" /> </PreferenceScreen> <CheckBoxPreference android:key="dock_sounds" android:title="@string/dock_sounds_enable_title" android:defaultValue="false" /></PreferenceScreen>
二：指向OnCreatView()
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View v = inflater.inflate(R.layout.add_layout_preference,null);return v;}三：指向OnCreateActivity()是PreferenceFragment的
四：指向OnResume()
@Override public void onResume() { super.onResume(); lookupRingtoneNames();此处是更新铃声名字和提示音名字的 IntentFilter filter = new IntentFilter(Intent.ACTION_DOCK_EVENT); getActivity().registerReceiver(mReceiver, filter);注册一个广播接受着 }五：指向onPreferenceTreeClick单机事件，也是PreferenceFragment的单机事件，注意和Settings的继承的还是activity，所以与headClick区分<span style="white-space:pre"></span>if (preference == mVibrateWhenRinging) { Settings.System.putInt(getContentResolver(), Settings.System.VIBRATE_WHEN_RINGING,//响铃时震动chekBox，根据值来选择设置进去put mVibrateWhenRinging.isChecked() ? 1 : 0); } else if (preference == mDtmfTone) { Settings.System.putInt(getContentResolver(), Settings.System.DTMF_TONE_WHEN_DIALING,//拨号键盘触摸音效chekBox，根据值put进去数据库 mDtmfTone.isChecked() ? 1 : 0); } else if (preference == mSoundEffects) { if (mSoundEffects.isChecked()) { mAudioManager.loadSoundEffects(); } else { mAudioManager.unloadSoundEffects(); } Settings.System.putInt(getContentResolver(), Settings.System.SOUND_EFFECTS_ENABLED,//触摸提示音chekBox，根据值put进去数据库 mSoundEffects.isChecked() ? 1 : 0); } else if (preference == mHapticFeedback) { Settings.System.putInt(getContentResolver(), Settings.System.HAPTIC_FEEDBACK_ENABLED,//触摸时震动chekBox，根据值put进去 mHapticFeedback.isChecked() ? 1 : 0); } else if (preference == mLockSounds) { Settings.System.putInt(getContentResolver(), Settings.System.LOCKSCREEN_SOUNDS_ENABLED,//锁屏提示音checkBox，根据值put进去 mLockSounds.isChecked() ? 1 : 0); } else if (preference == mMusicFx) { // let the framework fire off the intent return false;} else if (preference == mDockAudioSettings) { int dockState = mDockIntent != null ? mDockIntent.getIntExtra(Intent.EXTRA_DOCK_STATE, 0) : Intent.EXTRA_DOCK_STATE_UNDOCKED; if (dockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) { showDialog(DIALOG_NOT_DOCKED); } else { boolean isBluetooth = mDockIntent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE) != null; if (isBluetooth) { Intent i = new Intent(mDockIntent); i.setAction(DockEventReceiver.ACTION_DOCK_SHOW_UI); i.setClass(getActivity(), DockEventReceiver.class); getActivity().sendBroadcast(i); } else { PreferenceScreen ps = (PreferenceScreen)mDockAudioSettings; Bundle extras = ps.getExtras(); extras.putBoolean("checked", Settings.Global.getInt(getContentResolver(), Settings.Global.DOCK_AUDIO_MEDIA_ENABLED, 0) == 1); super.onPreferenceTreeClick(ps, ps); } }--------------------------------------这一段，好像没实例化? } else if (preference == mDockSounds) { Settings.Global.putInt(getContentResolver(), Settings.Global.DOCK_SOUNDS_ENABLED, mDockSounds.isChecked() ? 1 : 0); } else if (preference == mDockAudioMediaEnabled) { Settings.Global.putInt(getContentResolver(), Settings.Global.DOCK_AUDIO_MEDIA_ENABLED, mDockAudioMediaEnabled.isChecked() ? 1 : 0); } else if (mMultiSimRingtonePreference != null &&-------------------------------------多SIM铃声设置 preference == mMultiSimRingtonePreference) { Intent intent = mMultiSimRingtonePreference.getIntent(); intent.putExtra(SelectSubscription.PACKAGE, "com.android.multisimsettings"); intent.putExtra(SelectSubscription.TARGET_CLASS, "com.android.multisimsettings.MultiSimSoundSettings"); startActivity(intent); } return true; } 六：此时发现音量，手机铃声，默认系统提示音等等不是chekBox的控件，没有写单机事件，但是还是会弹出对话框，按理说应该是在五的时候写单机事件，设定跳转，仔细研究才发现原来是自己定义了控件，来分析XML文件<com.android.settings.RingerVolumePreference这个就是自己定义的类，因为当前的属性满足不来，所以就自己定义一个类 android:key="ring_volume" android:title="@string/all_volume_title" android:dialogTitle="@string/all_volume_title"//这个就是标题：音量 android:persistent="false" android:streamType="ring" /> <Preference android:key="musicfx" android:title="@string/musicfx_title"> <intent android:targetPackage="com.android.musicfx" android:targetClass="com.android.musicfx.ControlPanelPicker" /> </Preference> <PreferenceCategory android:key="category_calls_and_notification" android:title="@string/sound_category_call_ringtone_vibrate_title"/>此时再看音量：RinferVolumePreference这个音量类
RingerVolumePreference.java类继承了VolumePreference
直接定位到构造方法<pre name="code" class="javascript">public RingerVolumePreference(Context context, AttributeSet attrs) { super(context, attrs); // The always visible seekbar is for ring volume setStreamType(AudioManager.STREAM_RING); setDialogLayoutResource(R.layout.preference_dialog_ringervolume);//这个地方就是加载xml文件的布局 //setDialogIcon(R.drawable.ic_settings_sound); mSeekBarVolumizer = new SeekBarVolumizer[SEEKBAR_ID.length]; mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); }XML布局：
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent">----------------------------------------------------------------------------------------最外层是滚动视图 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:gravity="center_horizontal" android:paddingBottom="12dip" android:paddingTop="12dip"> <ImageView android:id="@android:id/icon" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingTop="20dip" android:visibility="gone" android:contentDescription="@null" /> <!-- Dummy --> <SeekBar android:id="@*android:id/seekbar" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:visibility="gone" /> <TextView android:textAppearance="?android:attr/textAppearanceSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingStart="16dip" android:layout_gravity="start" android:text="@string/volume_media_description" />------------------------------------------------------------------------------------------上面是一个linearLayout主要是把下面的四个布局加到这个里面 <!-- Used for the media volume --> <LinearLayout android:id="@+id/media_section" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingStart="8dip" android:orientation="horizontal" android:gravity="center_vertical"><!--wangjiaying add focus for SeekBar start--> <ImageView android:id="@+id/media_mute_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="16dip" android:background="?android:attr/selectableItemBackground" android:clickable="false" android:focusable="false" android:contentDescription="@string/volume_media_mute" /> <SeekBar android:id="@+id/media_volume_seekbar" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:paddingTop="2dip" android:layout_marginEnd="@dimen/volume_seekbar_side_margin" android:background="?android:attr/selectableItemBackground" android:clickable="true" android:focusable="true"/><!--wangjiaying add focus for SeekBar end--> </LinearLayout> </LinearLayout>--------------------------------------------------------------------------------------------其中一个的媒体的 <!-- Used for the ringer/notification volume --> <LinearLayout android:id="@+id/ringer_section" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/ringer_description_text" android:textAppearance="?android:attr/textAppearanceSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="16dip" android:paddingStart="16dip" android:layout_gravity="start" android:text="@string/volume_ring_description" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingStart="8dip" android:orientation="horizontal" android:gravity="center_vertical"><!--wangjiaying add focus for SeekBar start--> <ImageView android:id="@+id/ringer_mute_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="16dip" android:background="?android:attr/selectableItemBackground" android:contentDescription="@string/volume_ring_mute" android:clickable="false" android:focusable="false" /> <SeekBar android:id="@+id/ringer_volume_seekbar" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:paddingTop="2dip" android:layout_marginEnd="@dimen/volume_seekbar_side_margin" android:background="?android:attr/selectableItemBackground" android:clickable="true" android:focusable="true" /><!--wangjiaying add focus for SeekBar end--> </LinearLayout> </LinearLayout>--------------------------------------------------------------------------------------------------ringer的 <!-- Used for the notification volume --> <LinearLayout android:id="@+id/notification_section" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/notification_description_text" android:textAppearance="?android:attr/textAppearanceSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="16dip" android:paddingStart="16dip" android:layout_gravity="start" android:text="@string/volume_notification_description" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingStart="8dip" android:orientation="horizontal" android:gravity="center_vertical"><!--wangjiaying add focus for SeekBar start--> <ImageView android:id="@+id/notification_mute_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="16dip" android:background="?android:attr/selectableItemBackground" android:contentDescription="@string/volume_notification_mute" android:clickable="false" android:focusable="false" /> <SeekBar android:id="@+id/notification_volume_seekbar" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:paddingTop="2dip" android:layout_marginEnd="@dimen/volume_seekbar_side_margin" android:background="?android:attr/selectableItemBackground" android:clickable="true" android:focusable="true"/><!--wangjiaying add focus for SeekBar end--> </LinearLayout> </LinearLayout>--------------------------------------------------------------------------------------------------铃声和通知的 <!-- Used for the alarm volume --> <LinearLayout android:id="@+id/alarm_section" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:textAppearance="?android:attr/textAppearanceSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="16dip" android:paddingStart="16dip" android:layout_gravity="start" android:text="@string/volume_alarm_description" /> <!-- Used for the alarm volume --> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingStart="8dip" android:orientation="horizontal" android:gravity="center_vertical"><!--wangjiaying add focus for SeekBar start--> <ImageView android:id="@+id/alarm_mute_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="16dip" android:background="?android:attr/selectableItemBackground" android:contentDescription="@string/volume_alarm_mute" android:clickable="false" android:focusable="false" /> <SeekBar android:id="@+id/alarm_volume_seekbar" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:paddingTop="2dip" android:layout_marginEnd="@dimen/volume_seekbar_side_margin" android:background="?android:attr/selectableItemBackground" android:clickable="true" android:focusable="true"/><!--wangjiaying add focus for SeekBar end--> </LinearLayout> </LinearLayout>-------------------------------------------------------------------------------------------------------闹钟的设置 </LinearLayout></ScrollView>下面定位到onBindDialogView
for (int i = 0; i < SEEKBAR_ID.length; i++) { SeekBar seekBar = (SeekBar) view.findViewById(SEEKBAR_ID[i]); mSeekBars[i] = seekBar; if (SEEKBAR_TYPE[i] == AudioManager.STREAM_MUSIC) { mSeekBarVolumizer[i] = new SeekBarVolumizer(getContext(), seekBar, SEEKBAR_TYPE[i], getMediaVolumeUri(getContext())); } else { mSeekBarVolumizer[i] = new SeekBarVolumizer(getContext(), seekBar, SEEKBAR_TYPE[i]); } }mSeekBars[0].setOnKeyListener(new View.OnKeyListener(){public boolean onKey(View v, int keyCode, KeyEvent event) { boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN); switch (keyCode) { case 21: if (isdown) { mSeekBarVolumizer[0].changeVolumeBy(-1); } return true; case 22: if (isdown) { mSeekBarVolumizer[0].changeVolumeBy(1); } return true; case KeyEvent.KEYCODE_VOLUME_MUTE: if (isdown) { mSeekBarVolumizer[0].muteVolume(); } return true; default: return false; } }});mSeekBars[2].setOnKeyListener(new View.OnKeyListener(){public boolean onKey(View v, int keyCode, KeyEvent event) {boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);switch (keyCode) { case 21:if (isdown) { mSeekBarVolumizer[2].changeVolumeBy(-1);}return true;case 22: if (isdown) {mSeekBarVolumizer[2].changeVolumeBy(1); }return true;case KeyEvent.KEYCODE_VOLUME_MUTE:if (isdown) {mSeekBarVolumizer[2].muteVolume();}return true;default:return false; }}});mSeekBars[1].setOnKeyListener(new View.OnKeyListener(){public boolean onKey(View v, int keyCode, KeyEvent event) {boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);switch (keyCode) { case 21:if (isdown) { mSeekBarVolumizer[1].changeVolumeBy(-1);}return true;case 22: if (isdown) {mSeekBarVolumizer[1].changeVolumeBy(1); }return true;case KeyEvent.KEYCODE_VOLUME_MUTE:if (isdown) {mSeekBarVolumizer[1].muteVolume();}return true;default:return false; }}});mSeekBars[3].setOnKeyListener(new View.OnKeyListener(){public boolean onKey(View v, int keyCode, KeyEvent event) {boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);switch (keyCode) { case 21:if (isdown) { mSeekBarVolumizer[3].changeVolumeBy(-1);}return true;case 22: if (isdown) {mSeekBarVolumizer[3].changeVolumeBy(1); }return true;case KeyEvent.KEYCODE_VOLUME_MUTE:if (isdown) {mSeekBarVolumizer[3].muteVolume();}return true;default:return false; }}}); // Register callbacks for mute/unmute buttons for (int i = 0; i < mCheckBoxes.length; i++) { ImageView checkbox = (ImageView) view.findViewById(CHECKBOX_VIEW_ID[i]); mCheckBoxes[i] = checkbox; } // Load initial states from AudioManager updateSlidersAndMutedStates(); // Listen for updates from AudioManager if (mRingModeChangedReceiver == null) { final IntentFilter filter = new IntentFilter(); filter.addAction(AudioManager.RINGER_MODE_CHANGED_ACTION); mRingModeChangedReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { final String action = intent.getAction(); if (AudioManager.RINGER_MODE_CHANGED_ACTION.equals(action)) { mHandler.sendMessage(mHandler.obtainMessage(MSG_RINGER_MODE_CHANGED, intent .getIntExtra(AudioManager.EXTRA_RINGER_MODE, -1), 0)); } } }; getContext().registerReceiver(mRingModeChangedReceiver, filter); } boolean useMasterVolume = getContext().getResources(). getBoolean(com.android.internal.R.bool.config_useMasterVolume); if (useMasterVolume) { // If config_useMasterVolume is true, all streams are treated as STREAM_MASTER. // So hide all except a stream. int id; if (Utils.isVoiceCapable(getContext())) { id = R.id.ringer_section; } else { id = R.id.media_section; } for (int i = 0; i < SEEKBAR_SECTION_ID.length; i++) { if (SEEKBAR_SECTION_ID[i] != id) { view.findViewById(SEEKBAR_SECTION_ID[i]).setVisibility(View.GONE); } } } else { // Disable either ringer+notifications or notifications int id; if (!Utils.isVoiceCapable(getContext())) { id = R.id.ringer_section; } else { id = R.id.notification_section; } View hideSection = view.findViewById(id); hideSection.setVisibility(View.GONE); } } 再回过头来看手机铃声DefaultRingtonePreference这个类，默认提示音也同样是这个类
class DefaultRingtonePreference extends RingtonePreference
public class DefaultRingtonePreference extends RingtonePreference { private static final String TAG = "DefaultRingtonePreference"; public DefaultRingtonePreference(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onPrepareRingtonePickerIntent(Intent ringtonePickerIntent) { super.onPrepareRingtonePickerIntent(ringtonePickerIntent); /* * Since this preference is for choosing the default ringtone, it * doesn't make sense to show a 'Default' item. */ ringtonePickerIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, false); } @Override protected void onSaveRingtone(Uri ringtoneUri) { RingtoneManager.setActualDefaultRingtoneUri(getContext(), getRingtoneType(), ringtoneUri); } @Override protected Uri onRestoreRingtone() { return RingtoneManager.getActualDefaultRingtoneUri(getContext(), getRingtoneType()); } }到此，大致流程走完，具体的还要再看下去！
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