如何在线程中等待，直到它收到来自谷歌 API 客户端的连接回调

Question

我对多线程没有太多经验，所以请帮助我。我有一个后台线程，我在其中连接我的谷歌 api 客户端以查找我的当前位置。当我调用myGoogleApiClient.connect（）时，它会尝试连接，并且在连接时收到回调，但是在调用连接方法后，我的流会返回。我希望我的程序在那里等待并继续执行我的下一个任务。这是代码

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();
    }
}   

我正在从这样的计时器任务调用我的连接方法

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);
    }

Answer 1

根据你的代码，你只想在每次调用"connect"方法并成功连接后做一些事情。因此，也许您最好在回调"onConnected"中执行操作。

Answer 2

所以终于找到了我问题的答案。我使用这种技术来解决我的问题。

//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();
                        }

跟着这个人来解决我的问题 http://forums.devshed.com/java-help-9/block-thread-callback-method-called-thread-904920.html