如果偵聽器與我的Activity不在同一個類中，如何使用asyncTask +位置偵聽器？

Question

我想根據他的當前位置爲用戶提供一些優惠。

這意味着UI應該等待（不被阻止，但等待動畫） - 所以我曾經想過使用位置監聽器和一個asyncTask。

但聽衆簽名返回void

public class MyLocationListener implements LocationListener { 

    public void onLocationChanged(final Location loc) { 

和asynTask不會在這裏幫助（因爲它是從我的活動saperated類）

你會如何建議這樣做？

Answer 1

希望這有助於你

public class MyLocationListener extends LocationListener{ 

    public interface MyLocCallbacks{ 
     onLocFound(double lat, double lng); 
    } 

    private MyLocCallbacks mCallbacks; 

    public MyLocationListener(MyLocCallbacks callback){ 
     this.mCallbacks = callback; 

     //Make sure to start the LocationSerivce here 
    } 

    public void onLocationChanged(final Location loc) { 
     this.mCallbacks.onLocFound(log.getLatitude(), loc.getLongitude()) 
    } 

} 

MainActivity

public class MainActivity implements MyLocCallbacks{ 

    private MyLocationListener mLocListener; 

    onCreate(S...){ 
     mLocListener = new MyLocationListener(this); //this for the interface 
    } 

    //This one is called by your Location Listener 
    @Override 
    onLocFound(double lat, double lng){ 
     startAnimation(); 
    } 


    private void startAnimation(){ 
     //do here your startAnimation, 
     //before you could show a simple loading screen 
    } 
}