從一個佈局拖動圖像到另一個佈局 - android

Question

我正在創建一個android應用程序，將在主佈局上放置圖像。我的問題是如何拖動圖像並將其放在另一個佈局上。

我的一些代碼來自：http://www.vogella.com/articles/AndroidDragAndDrop/article.html

我的代碼工作，只要你拖動它在同一版面它不另佈局移動。

這是我的代碼：

public class MainActivity extends Activity {  
int _xDelta; 
int _yDelta; 
    @Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    findViewById(R.id.myimage1).setOnTouchListener(new MyTouchListener()); 
    findViewById(R.id.myimage2).setOnTouchListener(new MyTouchListener()); 
    findViewById(R.id.myimage3).setOnTouchListener(new MyTouchListener()); 
    findViewById(R.id.myimage4).setOnTouchListener(new MyTouchListener()); 
    findViewById(R.id.topleft).setOnDragListener(new MyDragListener()); 
    findViewById(R.id.topright).setOnDragListener(new MyDragListener()); 
    findViewById(R.id.bottomleft).setOnDragListener(new MyDragListener()); 
    findViewById(R.id.bottomright).setOnDragListener(new MyDragListener()); 

} 

private final class MyTouchListener implements OnTouchListener { 
public boolean onTouch(View view, MotionEvent motionEvent) { 


     final int X = (int) motionEvent.getRawX(); 
     final int Y = (int) motionEvent.getRawY(); 
     switch (motionEvent.getAction() & MotionEvent.ACTION_MASK) { 
      case MotionEvent.ACTION_DOWN: 
       LinearLayout.LayoutParams lParams = (LinearLayout.LayoutParams) view.getLayoutParams(); 
       _xDelta = X - lParams.leftMargin; 
       _yDelta = Y - lParams.topMargin; 

           break; 
      case MotionEvent.ACTION_UP: 
       break; 
      case MotionEvent.ACTION_POINTER_DOWN: 
       break; 
      case MotionEvent.ACTION_POINTER_UP: 
       break; 
      case MotionEvent.ACTION_MOVE: 
       LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) view.getLayoutParams(); 
       layoutParams.leftMargin = X - _xDelta; 
       layoutParams.topMargin = Y - _yDelta; 
       layoutParams.rightMargin = -250; 
       layoutParams.bottomMargin = -250; 
       view.setLayoutParams(layoutParams); 
       break; 
     } 
     return true; 
} 
} 

    class MyDragListener implements OnDragListener { 
@Override 
public boolean onDrag(View v, DragEvent event) { 
    int action = event.getAction(); 
    switch (event.getAction()) { 
    case DragEvent.ACTION_DRAG_STARTED: 
    break; 
    case DragEvent.ACTION_DRAG_ENTERED: 
     break; 
    case DragEvent.ACTION_DRAG_EXITED: 
    break; 
    case DragEvent.ACTION_DROP: 
    View view = (View) event.getLocalState(); 
    ViewGroup owner = (ViewGroup) view.getParent(); 
    owner.removeView(view); 
    LinearLayout container = (LinearLayout) v; 
    container.addView(view); 
    view.setVisibility(View.VISIBLE); 
    break; 
    case DragEvent.ACTION_DRAG_ENDED: 
    default: 
    break; 
    } 
    return true; 
} 

}}

希望你能幫助我。

Answer 1

我做了一個感動視圖無形的，在舊觀點的地方創建了相同的外觀視圖編程和設置這個新的視圖，用於移動（根是新創建的視圖中的根佈局）。

 ImageView tmpView; 
    private float dX; 
    private float dY; 
    public boolean onTouch(View view, MotionEvent event) { 
      switch (event.getActionMasked()) { 
       case MotionEvent.ACTION_DOWN: 

        view.setVisibility(View.GONE); 
        Log.d(TAG, "event.getRawX() " + event.getRawX() + ", event.getRawY() " + event.getRawY()); 
        dX = view.getX() - event.getRawX(); 
        dY = view.getY() - event.getRawY(); 

        tmpView = new ImageView(SongActivity.this); 
        tmpView.setImageDrawable(((ImageView) view).getDrawable()); 

        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(100, 100); 
        params.leftMargin = (int) event.getRawX(); 
        params.topMargin = (int) event.getRawY(); 
        root.addView(tmpView, params); 

        RelativeLayout.LayoutParams ivLayoutParams = (RelativeLayout.LayoutParams) tmpView.getLayoutParams(); 
        ivLayoutParams.leftMargin = (int) (event.getRawX()); 
        ivLayoutParams.topMargin = (int) (event.getRawY() - 250); 
        ivLayoutParams.rightMargin = -250; 
        ivLayoutParams.bottomMargin = -250; 
        tmpView.setLayoutParams(ivLayoutParams); 

        break; 
       case MotionEvent.ACTION_MOVE: 
        tmpView.setY(event.getRawY() - 250); 
        tmpView.setX(event.getRawX() + dX); 
        break; 
       case MotionEvent.ACTION_UP: 
        break; 
       default: 
        return false; 
      } 
      return true; 
     }