Android ImageView:我怎样才能获得当前的旋转角度?
问题描述:
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,如何获取ImageView的当前旋转角度?Android ImageView:我怎样才能获得当前的旋转角度?
谢谢
答
您需要将您以前的旋转角度存储在某个变量中。
答
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;
您可以通过扩展RotateAnimation,看到我的答案[这里]实现这一目标[1] [1]:http://*.com/questions/26139963/rotateanimation,得到电流角/ 29168941#29168941 – rickul 2015-03-20 14:33:46