我無法從類中調用主要活動的方法

Question

我無法從類中調用主要活動的方法。 我從一個類調用主要活動的方法，那麼它提供了一個錯誤是無法創建內螺紋處理程序尚未調用Looper.prepare（）

這是我的代碼

package com.example.romil.mypushexample; 

import android.app.NotificationManager; 
import android.app.PendingIntent; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.media.RingtoneManager; 
import android.net.Uri; 
import android.support.v4.app.NotificationCompat; 
import android.util.Log; 
import android.widget.Toast; 

import com.google.firebase.messaging.FirebaseMessagingService; 
import com.google.firebase.messaging.RemoteMessage; 

import java.io.InputStream; 
import java.net.HttpURLConnection; 
import java.net.URL; 

import retrofit2.Call; 
import retrofit2.Callback; 
import retrofit2.Response; 

/** 
* Created by romil on 22/4/17. 
*/ 

public class MyFirebaseMessagingService extends FirebaseMessagingService { 
    private static final String TAG = "FCM Service"; 
    String message; 
    String imageUri; 
    Bitmap bitmap; 
    String TrueOrFlase; 
    API realtrackerApi; 
    UserSessionManager sessionManager; 
    MainActivity mActivity; 


    public void getActivityObjetM(){ 
     mActivity=new MainActivity(); 
     mActivity.notificationAdded(true); 
    } 



    @Override 
    public void onMessageReceived(RemoteMessage remoteMessage) { 


     // TODO: Handle FCM messages here. 
     // If the application is in the foreground handle both data and notification messages here. 
     // Also if you intend on generating your own notifications as a result of a received FCM 
     // message, here is where that should be initiated. 
     Log.d(TAG, "From: " + remoteMessage.getFrom()); 
     //Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody()); 
//  Log.i(TAG,remoteMessage.getNotification().getBody()); 

     realtrackerApi=GlobalMethods.getRealtrackerAPI(this); 
     sessionManager=new UserSessionManager(this); 

     remoteMessage.getData(); 
     Log.i(TAG, "Message data payload: " + remoteMessage.getData()); 

     if (remoteMessage.getData().size() > 0) { 
      Log.i(TAG, "Message data payload: " + remoteMessage.getData()); 
      message = remoteMessage.getData().get("message"); 
      imageUri = remoteMessage.getData().get("image"); 
      bitmap = getBitmapfromUrl(imageUri); 
      TrueOrFlase = remoteMessage.getData().get("AnotherActivity"); 
      sendNotification(message, bitmap, TrueOrFlase); 
      getActivityObjetM(); 
     } 

     if (remoteMessage.getNotification() != null) { 
      Log.i(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody()); 
     } 
    } 
    private void sendNotification(String messageBody, Bitmap image, String TrueOrFalse) { 
     Intent intent = new Intent(this, MainActivity.class); 
     intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
     intent.putExtra("AnotherActivity", TrueOrFalse); 
     PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent, 
       PendingIntent.FLAG_ONE_SHOT); 

     Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); 
     NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this) 
       .setLargeIcon(image)/*Notification icon image*/ 
       .setSmallIcon(R.drawable.testimage1) 
       .setContentTitle(messageBody) 
       .setStyle(new NotificationCompat.BigPictureStyle() 
         .bigPicture(image))/*Notification with Image*/ 
       .setAutoCancel(true) 
       .setSound(defaultSoundUri) 
       .setContentIntent(pendingIntent); 

     NotificationManager notificationManager = 
       (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 

     notificationManager.notify(0 /* ID of notification */, notificationBuilder.build()); 
    } 

    public Bitmap getBitmapfromUrl(String imageUrl) { 
     try { 
      URL url = new URL(imageUrl); 
      HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
      connection.setDoInput(true); 
      connection.connect(); 
      InputStream input = connection.getInputStream(); 
      Bitmap bitmap = BitmapFactory.decodeStream(input); 
      return bitmap; 

     } catch (Exception e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return null; 
     } 
    } 
} 

這是我的主要活動

package com.example.romil.mypushexample; 

import android.content.Context; 
import android.content.Intent; 
import android.support.v7.app.ActionBar; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import android.widget.Toast; 

import com.google.firebase.iid.FirebaseInstanceId; 
import com.google.firebase.messaging.FirebaseMessaging; 

import java.util.ArrayList; 

import retrofit2.Call; 
import retrofit2.Callback; 
import retrofit2.Response; 

import static java.security.AccessController.getContext; 

public class MainActivity extends AppCompatActivity { 


    ListView listView; 
    UserSessionManager sessionManager; 
    API realtrackerApi; 
    ArrayList<GetNotificationListOutput> data; 
    MyFirebaseMessagingService myFirebaseMessagingService; 
    int listItemCount; 
    Notification_Adapter adapter; 
    boolean notificationStatus=false; 



    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     listView=(ListView)findViewById(R.id.notification_listView); 
     sessionManager=new UserSessionManager(getApplicationContext()); 
     realtrackerApi=GlobalMethods.getRealtrackerAPI(this); 

//  message=myFirebaseMessagingService.getMessage(); 
//  image=myFirebaseMessagingService.getImage(); 

     findViewById(R.id.button).setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent i=new Intent(getApplicationContext(),Push_Notification.class); 
       startActivity(i); 
      } 
     }); 

     findViewById(R.id.showNotification).setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       RetroCallForGettingNotificationList(); 
       listView.setVisibility(View.VISIBLE); 
      } 
     }); 
     findViewById(R.id.refreshNotification).setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       RetroCallForGettingNotificationList2(); 
      } 
     }); 

     if (getIntent().getExtras() != null) { 

      for (String key : getIntent().getExtras().keySet()) { 
       String value = getIntent().getExtras().getString(key); 

       if (key.equals("AnotherActivity") && value.equals("True")) { 
        Intent intent = new Intent(this, AnotherActivity.class); 
        intent.putExtra("value", value); 
        startActivity(intent); 
        finish(); 
       } 

      } 
     } 
     subscribeToPushService(); 
    } 

    private void subscribeToPushService() { 
     FirebaseMessaging.getInstance().subscribeToTopic("news"); 

     Log.d("AndroidBash", "Subscribed"); 
     Toast.makeText(MainActivity.this, "Subscribed", Toast.LENGTH_SHORT).show(); 

     String token = FirebaseInstanceId.getInstance().getToken(); 

     // Log and toast 
     Log.d("AndroidBash", token); 
     Toast.makeText(MainActivity.this, token, Toast.LENGTH_SHORT).show(); 
    } 
    public void notificationAdded(boolean status){ 
      RetroCallForGettingNotificationList2(); 
    } 
} 

Answer 1

public void getActivityObjetM(){ 
    mActivity=new MainActivity(); 
    mActivity.notificationAdded(true); 
} 

上面的代碼就是做事情的錯誤的方式。

您可以使用本地廣播管理器。

Intent intent = new Intent("notification_received"); 
    intent.putExtra("status", value); 

    LocalBroadcastManager.getInstance(context).sendBroadcast(intent); 

在你的活動

private BroadcastReceiver message = new BroadcastReceiver() { 

    @Override 
    public void onReceive(Context context, Intent intent) { 

     //Do something with the intent 
    } 
}; 

更多信息檢查this