createScreenCaptureIntent不返回结果

Question

我正在尝试处理新的Android Lollipop MediaProjection API。

我发现（至少在我的股票三星银河S4 jfltexx）当我开始意图获取权限获取屏幕（ProjectionManager.createScreenCaptureIntent()），我不会在onActivityResult结果，除非我已经检查“唐“再询问”在之前的试...

private static final int ALLOW_SCREENSHOT_REQ = 102; 

{ 
... 
     if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 
      System.out.println("request permission"); 
      startActivityForResult(mProjectionManager.createScreenCaptureIntent(), ALLOW_SCREENSHOT_REQ); 
     } 
... 
} 

而结果处理：

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    System.out.println("RebootActivity.onActivityResult(" + requestCode + "," + resultCode + ", data)"); 
} 

的权限对话框显示很好，但我的行为被隐藏的，它永远不会去onActivityResult。

任何想法出了什么问题？

Answer 1

你有没有尝试过这样的：看到完整的示例android-ScreenCapture

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (requestCode == REQUEST_MEDIA_PROJECTION) { 
     if (resultCode != Activity.RESULT_OK) { 
      Log.i(TAG, "User cancelled"); 
      Toast.makeText(getActivity(), R.string.user_cancelled, Toast.LENGTH_SHORT).show(); 
      return; 
     } 
     Activity activity = getActivity(); 
     if (activity == null) { 
      return; 
     } 
     Log.i(TAG, "Starting screen capture"); 
     mResultCode = resultCode; 
     mResultData = data; 
     setUpMediaProjection(); 
     setUpVirtualDisplay(); 
    } 
} 

希望它会帮助你。