Why Start the Service on Android O and encounter a problem record Context.startForegroundService did not then call Service.startForeground
Recording scenarios: Android 8.0 has a complex feature; the system does not allow background applications to create background services. Therefore, Android 8.0 introduces a completely new method, Context.startForegroundService(), to start a new service in the foreground.
After the system creates the service, the app has 5 seconds to call the service’s startForeground() method to display the user-visible notification for the new service. If the app does not call startForeground() within this time limit, the system will stop the service and declare the application as ANR.
However, when calling: context.startForegroundService(intent), the following ANR is reported. The startForegroundService() document indicates that startForeground() is called after the service is started.
Bitmap icon = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
NotificationCompat.Builder notificationBuilder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
notificationBuilder = new NotificationCompat.Builder(this, CHANNEL_ID);
NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID, TAG, NotificationManager.IMPORTANCE_DEFAULT);
notificationChannel.enableVibration(true);
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(notificationChannel);
} else {
notificationBuilder = new NotificationCompat.Builder(this);
}
notificationBuilder
// .setContentTitle(notification.getTitle())
.setContentText(String.format("R.string.workfield_driver_refuse"))
// .setDefaults(DEFAULT_SOUND | DEFAULT_VIBRATE)
.setAutoCancel(true)
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setContentIntent(pendingIntent)
.setLargeIcon(icon)
.setColor(Color.RED)
.setSmallIcon(R.mipmap.ic_launcher);
notificationBuilder.setDefaults(DEFAULT_VIBRATE);
notificationBuilder.setLights(Color.YELLOW, 1000, 300);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());android.app.RemoteServiceException: Context.startForegroundService() did not then call Service.startForeground()
and run App see Error Log
Solution: After starting the service with startForegroundService, call startForeground() in the service’s onCreate method.
private static final String CHANNEL_ID = "1250012";
private static final String TAG = MyNotificationExtenderService.class.getSimpleName();Class ..... Bitmap icon = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
NotificationCompat.Builder notificationBuilder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
notificationBuilder = new NotificationCompat.Builder(this, CHANNEL_ID);
NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID, TAG, NotificationManager.IMPORTANCE_DEFAULT);
notificationChannel.enableVibration(true);
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(notificationChannel);
} else {
notificationBuilder = new NotificationCompat.Builder(this);
}
notificationBuilder
// .setContentTitle(notification.getTitle())
.setContentText(String.format("R.string.workfield_driver_refuse"))
// .setDefaults(DEFAULT_SOUND | DEFAULT_VIBRATE)
.setAutoCancel(true)
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setContentIntent(pendingIntent)
.setLargeIcon(icon)
.setColor(Color.RED)
.setSmallIcon(R.mipmap.ic_launcher);
notificationBuilder.setDefaults(DEFAULT_VIBRATE);
notificationBuilder.setLights(Color.YELLOW, 1000, 300);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(CHANNEL_ID,TAG,
NotificationManager.IMPORTANCE_HIGH);
notificationManager.createNotificationChannel(channel);
Notification notification = new Notification.Builder(getApplicationContext(),CHANNEL_ID).build();
startForeground(1, notification);
}
else {
// startForeground(1, notification);
}
and try ran again
Note that Notification.Builder(Context, String) is used in api 26, and the Id of NotificationChannel is to be specified. If not added, it will prompt: Developer warning for package XXX, Failed to post notification on channel “null”.
Of course, the configuration of NotificationChannel can refer to: https://developer.android.google.cn/reference/android/app/NotificationChannel.html
Notification.Builder Reference: https://developer.android.google.cn/reference/android/ App/Notification.Builder.html
Front desk service test app address: https://github.com/lyldding/foregroundservice
Credits : https://blog.csdn.net/lylddingHFFW/article/details/78219327
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