ViewRootImpl：在三星Galaxy S6上報告投遞結果：false

Question

我正在開發一款包含拖放功能的遊戲。它適用於除Samsung Galaxy S6之外的所有設備。

class MyDragListener implements View.OnDragListener { 
     Drawable normalShape = getResources().getDrawable(R.drawable.normal_shape); 
     Drawable targetShape = getResources().getDrawable(R.drawable.target_shape); 

     @Override 
     public boolean onDrag(View v, DragEvent event) { 

      // Handles each of the expected events 
      switch (event.getAction()) { 

       //signal for the start of a drag and drop operation. 
       case DragEvent.ACTION_DRAG_STARTED: 
        // do nothing 
        break; 

       //the drag point has entered the bounding box of the View 
       case DragEvent.ACTION_DRAG_ENTERED: 
        //v.setBackground(targetShape); //change the shape of the view 
        break; 

       //the user has moved the drag shadow outside the bounding box of the View 
       case DragEvent.ACTION_DRAG_EXITED: 

        break; 

       //drag shadow has been released,the drag point is within the bounding box of the View 
       case DragEvent.ACTION_DROP: 

        View view = (View) event.getLocalState(); 
        // There is some code here 

        break; 

       //the drag and drop operation has concluded. 
       case DragEvent.ACTION_DRAG_ENDED: 
        //v.setBackground(normalShape); //go back to normal shape 

       default: 
        break; 
      } 
      return true; 
     } 
    } 

    class MyClickListener implements View.OnTouchListener { 

     @Override 
     public boolean onTouch(View view, MotionEvent event) { 
      // TODO Auto-generated method stub 

      if (event.getAction() == MotionEvent.ACTION_DOWN) { 
       // create it from the object's tag 
       ClipData.Item item = new ClipData.Item((CharSequence) view.getTag()); 

       String[] mimeTypes = {ClipDescription.MIMETYPE_TEXT_PLAIN}; 
       ClipData data = new ClipData(view.getTag().toString(), mimeTypes, item); 
       View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view); 

       view.startDrag(data, //data to be dragged 
         shadowBuilder, //drag shadow 
         view, //local data about the drag and drop operation 
         0 //no needed flags 
       ); 

       view.setVisibility(View.INVISIBLE); 
       return true; 
      } 
      else if (event.getAction() == MotionEvent.ACTION_UP){ 
       view.setVisibility(View.VISIBLE); 
       return true; 
      } 
      else 
      { 
       return false; 
      } 



     } 
    } 

構建gradle看起來像這樣。

apply plugin: 'com.android.application' 

    android { 
     compileSdkVersion 23 
     buildToolsVersion "23.0.1" 

     defaultConfig { 
      applicationId "________" 
      minSdkVersion 16 
      targetSdkVersion 22 
     } 

     buildTypes { 
      release { 
       minifyEnabled false 
       proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt' 
      } 
      debug { 
       debuggable false 
      } 
     } 
    } 

    dependencies { 
     compile 'com.android.support:support-v4:23.0.0' 
     compile 'com.android.support:appcompat-v7:23.1.0' 
    } 

在三星Galaxy S6（Android版本5.1.1）中拖放後圖像簡單消失。在控制檯中顯示的錯誤是ViewRootImpl：報告丟棄結果：false該應用在任何其他設備上都沒有問題。是API問題還是什麼？爲了您的信息，我檢查了這個solution，但這不能解決我的問題。

Answer 1

爲了防止圖像不會消失，我會建議增加：

if (!isDropped) { 
    ((View) dragEvent.getLocalState()).setVisibility(View.VISIBLE); 
} 

你onDrag(...)方法，其中isDropped被聲明爲false全球boolean變量的末尾，但你ACTION_DROP機箱內使其等於true 。