我有一个带有AlarmManager的Activity,可以触发BroadcastReceiver。 BroadcastReceiver触发JobIntentService以向用户发送通知。
当用户点击"清除全部"或者轻扫以消除通知,我希望setDeleteIntent()重置计数器变量" totalMessages"为零,我在SharedPreferences文件中设置。它没有重置为零。我在这里缺少什么?
public class AlarmService extends JobIntentService {
static final int JOB_ID = 9999;
public static final String NOTIFICATIONS_COUNTER = "NotificationsCounter";
private static final int REQUEST_CODE_DELETE_INTENT = 1;
int totalMessages = 0;
static void enqueueWork(Context context, Intent work) {
enqueueWork(context, AlarmService.class, JOB_ID, work);
}
@Override
protected void onHandleWork(@NonNull Intent intent) {
IntentFilter filter = new IntentFilter();
filter.addAction("notification_cleared");
registerReceiver(receiver, filter);
sendNotification();
}
private void sendNotification() {
int notifyID = 1;
NotificationManager notificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
SharedPreferences sp = getSharedPreferences(NOTIFICATIONS_COUNTER, Context.MODE_PRIVATE);
totalMessages = sp.getInt("total-messages", 0); //initialize to 0 if it doesn't exist
SharedPreferences.Editor editor = sp.edit();
editor.putInt("total-messages", ++totalMessages);
editor.apply();
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
.setDefaults(Notification.DEFAULT_ALL)
.setSmallIcon(R.drawable.ic_announcement_white_24dp)
.setContentText("")
Intent i = new Intent(this, AlarmService.class);
i.setAction("notification_cleared");
PendingIntent deleteIntent = PendingIntent.getBroadcast(this,REQUEST_CODE_DELETE_INTENT,i,PendingIntent.FLAG_CANCEL_CURRENT);
mBuilder.setDeleteIntent(deleteIntent);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
mBuilder.setSubText(String.valueOf(totalMessages));
}
else {
mBuilder.setNumber(totalMessages);
}
if (notificationManager != null) {
notificationManager.notify(notifyID, mBuilder.build());
}
}
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action != null) {
if (action.equals("notification_cleared")) {
// Reset the Notifications counter ("total-messages") to zero since the user
// clicked on "CLEAR ALL" Notification or swiped to delete a Notification.
SharedPreferences sp1 = getSharedPreferences(NOTIFICATIONS_COUNTER, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp1.edit();
editor.clear();
editor.apply();
totalMessages = sp1.getInt("total-messages", 0); //initialize to 0 if it doesn't exist
editor.putInt("total-messages", totalMessages);
editor.apply();
}
}
}
};
@Override
public void onDestroy() {
super.onDestroy();
unregisterReceiver(receiver);
}
}
答案 0 :(得分:1)
问题是您的广播接收器清除通知的实现是在作业的生命周期内。 JobIntentService的任务是显示通知并离开广播接收器。但是,当用户点击通知中的CLEAR时,广播待处理的意图,但是没有人可以收听它。
对于解决方案,我建议您创建一个单独的广播接收器并在AndroidManifest.xml
中注册。届时,您的广播将始终被倾听,您可以在其中执行任何内容。