此示例演示有关如何在活动崩溃时清除Android通知
步骤1-在Android Studio中创建一个新项目,转到File⇒New Project并填写所有必需的详细信息以创建一个新项目。
步骤2- 将以下代码添加到res / layout / activity_main.xml。
<? xml version = "1.0" encoding = "utf-8" ?> <RelativeLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android :layout_width = "match_parent" android :layout_height = "match_parent" android :padding = "16dp" tools :context = ".MainActivity" > <Button android :id = "@+id/btnCreateNotification" android :layout_width = "wrap_content" android :layout_height = "wrap_content" android :layout_alignParentStart = "true" android :layout_alignParentEnd = "true" android :layout_centerInParent = "true" android :text = "Create Notification" /> </RelativeLayout>
步骤3-将以下代码添加到src / MainActivity。
package app.(cainiaojc.com).notifyme ;
import android.app.NotificationChannel ;
import android.app.NotificationManager ;
import android.app.PendingIntent ;
import android.content.Intent ;
import android.os.Bundle ;
import android.support.v4.app.NotificationCompat ;
import android.support.v7.app.AppCompatActivity ;
import android.view.View ;
public class MainActivity extends AppCompatActivity {
   public static final String NOTIFICATION_CHANNEL_ID = "10001" ;
   private final static String default_notification_channel_id = "default" ;
   @Override
   protected void onCreate (Bundle savedInstanceState) {
      super .onCreate(savedInstanceState) ;
      setContentView(R.layout. activity_main ) ;
   }
   public void createNotification (View view) {
      Intent notificationIntent = new Intent(getApplicationContext() , MainActivity. class ) ;
      notificationIntent.putExtra( "fromNotification" , true ) ;
      notificationIntent.setFlags(Intent. FLAG_ACTIVITY_CLEAR_TOP | Intent. FLAG_ACTIVITY_SINGLE_TOP ) ;
      PendingIntent pendingIntent = PendingIntent. getActivity ( this, 0 , notificationIntent , 0 ) ;
      NotificationManager mNotificationManager = (NotificationManager) getSystemService( NOTIFICATION_SERVICE ) ;
      NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(MainActivity. this, default_notification_channel_id ) ;
      mBuilder.setContentTitle( "My Notification" ) ;
      mBuilder.setContentIntent(pendingIntent) ;
      mBuilder.setColor(getColor(R.color. colorPrimary )) ;
      mBuilder.setContentText( "Notification Listener Service Example" ) ;
      mBuilder.setSmallIcon(R.drawable. ic_launcher_foreground ) ;
      mBuilder.setAutoCancel( true ) ;
      if (android.os.Build.VERSION. SDK_INT >= android.os.Build.VERSION_CODES. O ) {
         int importance = NotificationManager. IMPORTANCE_HIGH ;
         NotificationChannel notificationChannel = new NotificationChannel( NOTIFICATION_CHANNEL_ID , "NOTIFICATION_CHANNEL_NAME" , importance) ;
         mBuilder.setChannelId( NOTIFICATION_CHANNEL_ID ) ;
         assert mNotificationManager != null;
         mNotificationManager.createNotificationChannel(notificationChannel) ;
      }
      assert mNotificationManager != null;
      mNotificationManager.notify(( int ) System. currentTimeMillis () ,
      mBuilder.build()) ;
   }
}步骤4-将以下代码添加到src / CrashHandler。
package app.(cainiaojc.com).notifyme ;
import android.app.NotificationManager ;
import android.content.Context ;
public class CrashHandler implements Thread.UncaughtExceptionHandler {
   private static final int NOTIFICATION_ID = 12345 ;
   private Thread.UncaughtExceptionHandler defaultUEH ;
   private NotificationManager notificationManager ;
   public CrashHandler (Context context) {
      this . defaultUEH = Thread. getDefaultUncaughtExceptionHandler () ;
      notificationManager = (NotificationManager) context.getSystemService(Context. NOTIFICATION_SERVICE ) ;
   }
   public void uncaughtException (Thread t , Throwable e) {
      if ( notificationManager != null ) {
         try {
            notificationManager .cancel( NOTIFICATION_ID ) ;
         } catch (Throwable ex) {
            ex.printStackTrace() ;
         }
      }
      notificationManager = null;
      defaultUEH .uncaughtException(t , e) ;
   }
}第5步-将以下代码添加到AndroidManifest.xml
<? xml version = "1.0" encoding = "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android" package = "app.(cainiaojc.com).notifyme" > <uses-permission android :name = "android.permission.VIBRATE" /> <application android :allowBackup = "true" android :icon = "@mipmap/ic_launcher" android :label = "@string/app_name" android :roundIcon = "@mipmap/ic_launcher_round" android :supportsRtl = "true" android :theme = "@style/AppTheme" > <activity android :name = ".MainActivity" > <intent-filter> <action android :name = "android.intent.action.MAIN" /> <category android :name = "android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
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