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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