如何在線程中等待，直到它接收到來自谷歌的連接回調API客戶端

我對多線程沒有太多經驗，所以很好地幫助我。我有一個後臺線程，我連接我的谷歌API客戶端來找到我的當前位置。當我撥打myGoogleApiClient.connect（）它嘗試連接，並且在連接時收到回叫，但在連接方法調用後，我的流程返回。我希望我的程序在那裏等待並繼續執行我的下一個任務。下面是代碼如何在線程中等待，直到它接收到來自谷歌的連接回調API客戶端

public class CurrentLocation implements GoogleApiClient.OnConnectionFailedListener,GoogleApiClient.ConnectionCallbacks{ 
    private GoogleApiClient mGoogleApiClient; 
    private String placesTextFile; 
    Context context; 
    String TAG="NearbyPlaces"; 

    CurrentLocation(Context context) { 
     this.context = context; 
     mGoogleApiClient = new GoogleApiClient 
       .Builder(context) 
       .addApi(Places.GEO_DATA_API) 
       .addApi(Places.PLACE_DETECTION_API) 
       .addOnConnectionFailedListener(this) 
       .addConnectionCallbacks(this) 
       .build(); 
    } 

    private void connect() { 
     Log.d(TAG,"run called"); 
     if(mGoogleApiClient.isConnected()) 
      findLocations(); 
     else 
      mGoogleApiClient.connect(); //Here my flow goes back but i want my program to wait here till it gets onConnected callback 

    } 
    private void findLocations(){ 
    // some code here that need to be executed when my client connects 
    } 
    @Override 
    public void onConnected(@Nullable Bundle bundle) { 
     Log.d(TAG,"Google Client is Connected"); 
     findLocations(); 
    } 
}

我打電話給我的連接方法從計時器任務這樣

private void StartTracker() { 
     Log.d(TAG,"TimerTask is in waiting state now"); 
     timerScheduler.schedule(new TimerTask() { 
      @Override 
      public void run() { 

       while (isServiceRunning){ 
        try { 
         currentLocation.connect(); 
//video recorder should only be started when i will find out my current location successfully 
         videoRecorder.startVideoRecorder(); 
         Thread.sleep(getRandomRecordingDuration()); 
         videoRecorder.stopVideoRecorder(); 
         Thread.sleep(delayTime); 

        } catch (InterruptedException e) { 
         e.printStackTrace(); 
        } 

       } 

      } 
     }, delayTime); 
    }

來源

2016-02-22 Awais Ahmad

如何_your_'連接（）'方法被調用？你沒有給我們足夠的代碼。等待應該在'connect（）'的調用者中發生，並且它應該等待由onConnected（）方法發出信號的信號量。 –

@JimGarrison，爲什麼不在'connect（）'中等待？ – shmosel

@JimGarrison我編輯了我的文章..再次檢查一遍 –

因此終於找到了我的問題的答案。我使用這種技術來解決我的問題。

//for waiting to complete another job 
synchronized (synchObj) { 
      try { synchObj.wait();} 
      catch (InterruptedException ie) { 

      } 
     } 

//when job is done and want the execution from where it was stoped 
synchronized (synchObj) { 
          synchObj.notify(); 
         }

跟着這傢伙解決我的問題http://forums.devshed.com/java-help-9/block-thread-callback-method-called-thread-904920.html

來源

2016-02-22 09:26:25

根據你的代碼，你只想做之後每次你打電話的「連接」的東西方法，併成功connect.So也許你最好在回調「onConnected」做的事情。

來源

2016-02-22 08:06:28 ice

如何在線程中等待，直到它接收到來自谷歌的連接回調API客戶端

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