Android ImageView：如何获得当前的旋转角度？

Question

我旋转图像视图以指向所需方向的箭头。 在执行下一次旋转（使用RotateAnimation）之前，如何获得ImageView的当前旋转角度？

谢谢

Answer 1

您需要将先前的旋转角度存储在某个变量中。

Answer 2

保存旋转角度：

    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;