Android：如何獲取圖像/ ImageView中的xy座標？

Question

我在屏幕上有一個圖像（ImageView）。圖像佔用大約一半的屏幕，這意味着您可以單擊圖像和圖像兩側的圖像。

當我點擊圖像時如何獲得屏幕上的x和y座標？

我嘗試過使用onTouchEvent，但只有當我點擊圖像之外時，纔會調用它，而不是當我單擊圖像時。

問候， 馬蒂亞斯

Answer 1

使用OnClickListener上的ImageView接收click事件，或抽象您從ImageView的類和覆蓋功能「公共無效onTouch（MotionEvent EVT）」來獲取X/Y的座標這個觀點。

Answer 2

您可以使用getLocationOnScreen()

imageView.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View view) { 
      int[] values = new int[2]; 
      view.getLocationOnScreen(values); 
      Log.d("X & Y",values[0]+" "+values[1]); 
     } 
    }); 

而且，我的this answer將是有用的。

Answer 3

我最終沒有在ImageView上設置任何OnClickListener。相反，我只是執行「公共無效onTouch（MotionEvent事件）」和「公共無效onWindowFocusChanged（布爾hasFocus）」是這樣的：

private int fieldImgXY[] = new int[2]; 

@Override 
public void onWindowFocusChanged(boolean hasFocus) { 
    super.onWindowFocusChanged(hasFocus); 

    // Use onWindowFocusChanged to get the placement of 
    // the image because we have to wait until the image 
    // has actually been placed on the screen before we 
    // get the coordinates. That makes it impossible to 
    // do in onCreate, that would just give us (0, 0). 
    fieldImage.getLocationOnScreen(fieldImgXY); 
    Log.i(LOG_TAG, "fieldImage lockation on screen: " + 
      xyString(fieldImgXY[0], fieldImgXY[1])); 
} 

public boolean onTouchEvent(MotionEvent event) { 
    if (event.getAction() == MotionEvent.ACTION_DOWN) { 
     Log.i(LOG_TAG, "touch event - down"); 

     int eventX = (int) event.getX(); 
     int eventY = (int) event.getY(); 
     Log.i(LOG_TAG, "event (x, y) = " + xyString(eventX, eventY)); 

     int xOnField = eventX - fieldImgXY[0]; 
     int yOnField = eventY - fieldImgXY[1]; 
     Log.i(LOG_TAG, "on field (x, y) = " + xyString(xOnField, yOnField)); 
    } 
    return super.onTouchEvent(event); 
} 

Answer 4

imageview.setOnTouchListener(new View.OnTouchListener() { 
      @Override 
      public boolean onTouch(View v, MotionEvent event) { 
       if (event.getAction() == MotionEvent.ACTION_DOWN) { 
        int x = (int) event.getX(); 
        int y = (int) event.getY(); 
       } 
       return false; 
      } 
     });