java - 如何在线程中等待，直到收到来自 google 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，在其中连接我的 google api 客户端来查找我当前的位置。当我调用 myGoogleApiClient.connect() 时，它会尝试连接，连接后我会收到回调，但在调用 connect 方法后，我的流程会返回。我希望我的程序在那里等待并继续执行下一个任务。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

根据您的代码，您只想在每次调用“connect”方法并成功连接后执行一些操作。因此，也许您最好在回调“onConnected”中执行这些操作。