從應用程序在後臺的通知到片段？

Question

我正在構建一個帶有碎片的應用程序，並且正在使用Firebase通知。我想，當用戶點擊通知時，將他發送到MainActivity上的Fragment1。而且，我已經做到了，但問題在於，只有當應用程序處於前臺時纔有效。當應用程序處於後臺通知狀態時，將我發送到MainActivity而不是Fragment1。 這是MyFirebaseMessagingService：

@Override 
public void onMessageReceived(RemoteMessage remoteMessage) { 
    super.onMessageReceived(remoteMessage); 
    Log.d(TAG, "From " + remoteMessage.getFrom()); 
    Log.d(TAG, "Body " + remoteMessage.getNotification().getBody()); 
    sendNotification(remoteMessage); 
    Log.d("Msg", "Poruka je stigla"); 
} 
private void sendNotification(RemoteMessage remoteMessage){ 
    Intent intent=new Intent(myFirebaseMessagingService.this, MainActivity.class); 
    intent.putExtra("action", "goToFragment1"); 
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
    PendingIntent pendingIntent=PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT); 
    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); 
    NotificationCompat.Builder notification=new NotificationCompat.Builder(this) 
      .setSmallIcon(logo) 
      .setContentText(remoteMessage.getNotification().getBody()) 
      .setContentTitle("Naslov") 
      .setAutoCancel(true) 
      .setSound(defaultSoundUri) 
      .setContentIntent(pendingIntent); 
    NotificationManager notificationManager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE); 
    notificationManager.notify(0, notification.build()); 



}} 

這是我的MainActivity：

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    dugme=(Button)findViewById(R.id.dugme1); 
    dugme2=(Button)findViewById(R.id.subscribe); 
    dugme.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Fragment fragment = null; 
      if(view==dugme) { 
       fragment = new Fragment1(); 
      } 
      FragmentTransaction transaction=getSupportFragmentManager().beginTransaction(); 
      transaction.replace(R.id.myFragment, fragment); 
      transaction.addToBackStack(null); 
      transaction.setTransition(FragmentTransaction.TRANSIT_NONE); 
      transaction.commit(); 
     } 
    }); 
    String msg=getIntent().getStringExtra("action"); 
    FragmentManager fragmentManager=getSupportFragmentManager(); 
    FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction(); 
    if (msg!=null){ 
     if (msg.equals("goToFragment1")){ 
      Fragment1 fragment1=new Fragment1(); 
      fragmentTransaction.replace(R.id.myFragment, fragment1); 
      fragmentTransaction.commit(); 
     } 
    } 

    dugme2.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      FirebaseMessaging.getInstance().subscribeToTopic("android"); 
      Log.d("Log", "Uspesno ste se pretplatili"); 
     } 
    }); 

} 

我該怎麼辦？

Answer 1

當您的應用程序在後臺onNewIntent將被調用，而不是onCreate。

@Override 
protected void onNewIntent(Intent intent) { 
    super.onNewIntent(intent); 
    String msg=intent.getStringExtra("action"); 
    FragmentManager fragmentManager=getSupportFragmentManager(); 
    FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction(); 
    if (msg!=null){ 
     if (msg.equals("goToFragment1")){ 
      Fragment1 fragment1=new Fragment1(); 
      fragmentTransaction.replace(R.id.myFragment, fragment1); 
      fragmentTransaction.commit(); 
     } 
    } 
} 

Answer 2

您可以在片段中使用BroadCastReceiver。 https://developer.android.com/reference/android/content/BroadcastReceiver.html?hl=ru

努力創造這樣的事情：

覆蓋的onResume方法

IntentFilter filter = new IntentFilter(); 
filter.addAction("SOME_STRING_CONSTANT"); 
getActivity().registerReceiver(receiver, filter); 

和註銷你的方法的onDestroy接收器。現在你的廣播接收器可以在後臺工作

編輯

private BroadcastReceiver receiver = new BroadcastReceiver() { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
    if (intent.getAction() == "SOME_STRING_CONSTANT") { 
     // do something 
    } 
    } 
}; 

@Override 
public void onDestroyView() { 
    super.onDestroyView(); 
    getActivity().unregisterReceiver(receiver); 
} 

您可以發送一個事件從任何地方

Intent intent = new Intent(); 
intent.setAction("SOME_STRING_CONSTANT"); 
startActivity(intent);