Android ImageView：我怎樣才能獲得當前的旋轉角度？

Question

我旋轉圖像視圖以指向所需方向的箭頭。在執行下一次旋轉（使用RotateAnimation）之前，如何獲取ImageView的當前旋轉角度？

謝謝

Answer 1

您需要將您以前的旋轉角度存儲在某個變量中。

Answer 2

保存旋轉角度：

ImageView arrow = (ImageView) findViewById(R.id.arrow); 
    float x = arrow.getPivotX(); 
    float y = arrow.getPivotY(); 
    RotateAnimation anim = new RotateAnimation(arrowRotateStartAngle, arrowRotateXAngle, arrow.getWidth()/2, arrow.getHeight()/2); 
    anim.setFillAfter(true); 
    anim.setDuration(1000); 
    arrow.startAnimation(anim); 

    temRotate = arrowRotateStartAngle; 
    arrowRotateStartAngle = arrowRotateXAngle; 
    arrowRotateXAngle = temRotate;