in meiner App starte ich einen Dienst, um Benachrichtigungen zu erhalten, während die App im Hintergrund ist - dieser Dienst zwingt meine App automatisch zu starten, nachdem ich es zu stoppen. Ich habe versucht, das Problem zu lösen, indem ich ausstehende Absicht verwendete, aber es geschieht immer noch.Android-Dienst startet App automatisch
Hier ist meine Absicht, den Dienst zu starten:
Intent messageReceivingIntent = new Intent(this, MessageReceivingService.class);
messageReceivingIntent.putExtra("myUserId", myUserId);
Pending Inten messagePendingIntent = PendingIntent.getService(this, 0, messageReceivingIntent, PendingIntent.FLAG_UPDATE_CURRENT);
try {
// Perform the operation associated with our pendingIntent
messagePendingIntent.send();
} catch (PendingIntent.CanceledException e) {
e.printStackTrace();
}
, wenn ich Dienst über externalreceiver nennen bekomme ich eine Nullpointer. irgendeine Idee warum?
das ist mein BroadcastReceiver Aufruf:
messageReceivingIntent = new Intent(this, MessageReceivingService.class);
messageReceivingIntent.putExtra("myUserId", myUserId);
messageReceivingIntent.setAction("com.example.androidtest");
sendBroadcast(messageReceivingIntent);
Hier ist meine Rundfunkempfänger:
public class ExternalReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if(intent!=null){
Bundle extras = intent.getExtras();
if(!MapsActivity.inBackground){
MessageReceivingService.sendToApp(extras, context);
}
else{
MessageReceivingService.saveToLog(extras, context);
}
}
}
}
und das ist MessageReceivingService
public class MessageReceivingService extends Service {
private GoogleCloudMessaging gcm;
public static SharedPreferences savedValues;
public static final String INSTANCE_ID_SCOPE = "GCM";
final String BASE_URL = "http://www.example.com/";
public String myUserId;
public String registeredUserId;
public String token;
static PendingIntent pendingIntent;
public static void sendToApp(Bundle extras, Context context) {
Intent newIntent = new Intent();
newIntent.setClass(context, MapsActivity.class);
newIntent.putExtras(extras);
ShortcutBadger.applyCount(Content.getAppContext(), 0);
newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(newIntent);
}
public void onCreate() {
super.onCreate();
final String preferences = getString(R.string.preferences);
savedValues = getSharedPreferences(preferences, Context.MODE_PRIVATE);
// In later versions multi_process is no longer the default
if (VERSION.SDK_INT > 9) {
savedValues = getSharedPreferences(preferences, Context.MODE_MULTI_PROCESS);
}
gcm = GoogleCloudMessaging.getInstance(getBaseContext());
// Let AndroidMobilePushApp know we have just initialized and there may be stored messages
sendToApp(new Bundle(), this);
}
protected static void saveToLog(Bundle extras, Context context) {
SharedPreferences.Editor editor = savedValues.edit();
String numOfMissedMessages = context.getString(R.string.num_of_missed_messages);
int linesOfMessageCount = 0;
for (String key : extras.keySet()) {
String line = String.format("%s=%s", key, extras.getString(key));
editor.putString(key, line);
linesOfMessageCount++;
}
editor.putInt(context.getString(R.string.lines_of_message_count), linesOfMessageCount);
editor.putInt(context.getString(R.string.lines_of_message_count), linesOfMessageCount);
editor.putInt(numOfMissedMessages, savedValues.getInt(numOfMissedMessages, 0) + 1);
editor.commit();
String type = extras.getString("model");
String id = extras.getString("id");
String userId = extras.getString("user_id");
//postNotification(new Intent(context, MapsActivity.class), context);
if(type != null) {
if (type.equals("content")) {
Intent contentIntent = new Intent(context, ContentDetailActivity.class);
Log.v("userID", userId);
contentIntent.putExtra("contentId", id);
if (userId != null) {
contentIntent.putExtra("userId", userId);
}
postNotification(contentIntent, context);
} else if (type.equals("user")) {
Intent userIntent = new Intent(context, ProfileActivity.class);
userIntent.putExtra("userId", id);
postNotification(userIntent, context);
}
} else {
postNotification(new Intent(context, NotificationsActivity.class), context);
}
ShortcutBadger.applyCount(Content.getAppContext(), Integer.valueOf(savedValues.getInt(Content.getAppContext().getString(R.string.num_of_missed_messages), 0)));
}
protected static void postNotification(Intent intentAction, Context context) {
final NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
pendingIntent = PendingIntent.getActivity(context, 0, intentAction, PendingIntent.FLAG_UPDATE_CURRENT);
int numOfMissedMessages = 0;
String missedMessage = "";
if(savedValues != null){
missedMessage = savedValues.getString("message", "nothing there");
}
Log.v("NUMOFMISSEDMESSAGES", String.valueOf(numOfMissedMessages));
final Notification notification = new NotificationCompat.Builder(context).setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(missedMessage.substring(missedMessage.indexOf("=") + 1, missedMessage.length()))
.setContentText("")
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.build();
mNotificationManager.notify(R.string.notification_number, notification);
}
private void register() {
new AsyncTask() {
protected Object doInBackground(final Object... params) {
try {
String instanceId = InstanceID.getInstance(getApplicationContext()).getId();
//token = gcm.register(getString(R.string.project_number));
token = InstanceID.getInstance(getApplicationContext()).getToken(getString(R.string.project_number), INSTANCE_ID_SCOPE);
Log.i("registrationId", token);
} catch (IOException e) {
Log.i("Registration Error", e.getMessage());
}
return true;
}
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
new SendRegUserId().execute();
}
}.execute();
}
public IBinder onBind(Intent arg0) {
return null;
}
}
Verwenden Sie einen 'Broadcast Receiver'? – SQLiteNoob
Sie verwenden viele statische Variablen in Ihrem 'Service'. Dies ist wahrscheinlich der Grund für Ihre Probleme. Wenn Sie 'NullPointerException' erhalten, poste bitte die Fehlermeldungen einschließlich stacktrace von logcat und erkläre, was zur Zeit passierte. Veröffentlichen Sie auch den Code aus Ihrem 'Service' 'onStartCommand()' –