精通Android应用开发第六篇：Toast、Notification、Alarm， Android中的通知实现

启动AcStart，负责在创建时立即创建一个Notification在状态栏中，处理动作为后面的AcNotificationDealer。

AcStart.java

package jtapp.notifications;import android.app.Activity;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.net.Uri;import android.os.Bundle;public class AcStart extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); String ns = Context.NOTIFICATION_SERVICE; NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns); Long when = System.currentTimeMillis(); CharSequence tickerText = "My notification: Hello World! Click to deal this notification."; Notification notification = new Notification(R.drawable.icon, tickerText, when); notification.vibrate = new long[] {100,250,100,500}; Context context = getApplicationContext(); CharSequence contentTitle = "My notification"; CharSequence contentText = "Hello World! Click to deal this notification."; Intent notificationIntent = new Intent(this, AcNotificationDealer.class); PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); notification.setLatestEventInfo( context, contentTitle, contentText, contentIntent); mNotificationManager.notify(9999, notification); }}

 

取消上一通知，创建10s定时器通知。

AcNotificationDealer.java

package jtapp.notifications;import java.util.Calendar;import android.app.Activity;import android.app.AlarmManager;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.widget.Toast;public class AcNotificationDealer extends Activity {/** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.notifdealer); String ns = Context.NOTIFICATION_SERVICE; NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns); mNotificationManager.cancel(9999); Intent intent = new Intent( AcNotificationDealer.this, ReceiverAlarm.class); PendingIntent appIntent = PendingIntent.getBroadcast( AcNotificationDealer.this, 0, intent, 0); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(System.currentTimeMillis()); calendar.add(Calendar.SECOND, 10); AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE); am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), appIntent); Toast.makeText(this, "10秒后在状态栏将创建定时器通知.", Toast.LENGTH_LONG).show(); } }

 

接受10s定时器通知，并创建状态栏通知。

ReceiverAlarm.java

package jtapp.notifications;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.net.Uri;public class ReceiverAlarm extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) { String ns = Context.NOTIFICATION_SERVICE; NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(ns); Long when = System.currentTimeMillis(); CharSequence tickerText = "My Alarm Fired：Hello World Alarm! Click ready to dial 10010."; Notification notification = new Notification(R.drawable.icon, tickerText, when); notification.vibrate = new long[] {100,250,100,500}; CharSequence contentTitle = "My Alarm Fired"; CharSequence contentText = "Hello World Alarm! Click ready to dial 10010."; Intent notificationIntent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:10010")); PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0); notification.setLatestEventInfo( context, contentTitle, contentText, contentIntent); mNotificationManager.notify(9998, notification);}}

 

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="启动该Activity后, 会在状态栏产生一个通知，该通知用来进入通知处理Activity." /></LinearLayout>

 

notifdealer.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="此页面为通知处理页面，用来处理点击状态栏Notification后的流程，状态栏上会自动取消该通知，并且设定10秒后创建Dial 10010的定时器通知。" /></LinearLayout>

 

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="jtapp.notifications" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".AcStart" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="AcNotificationDealer"></activity><receiver android:name="ReceiverAlarm"></receiver></application><uses-permission android:name="android.permission.CALL_PHONE"></uses-permission><uses-permission android:name="android.permission.VIBRATE"></uses-permission></manifest>