<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/your_drawable"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="360" />
我想以编程方式旋转绘制。
I want programmatically rotate the drawable.
我应该怎么办呢?
下面是我的回调
private class RotateListener implements RotateGestureDetector.OnRotateGestureListener{
@Override
public boolean onRotate(MotionEvent event1, MotionEvent event2,
double deltaAngle) {
return true;
}
}
在 deltaangle
不超过0.1,我不知道什么是获取价值。
The deltaangle
not more than 0.1, I not sure what is the extract value.
以下code围绕其中心的ImageView的:
The following code rotates an ImageView around its center:
ImageView myImageView = (ImageView)findViewById(R.id.my_imageview);
AnimationSet animSet = new AnimationSet(true);
animSet.setInterpolator(new DecelerateInterpolator());
animSet.setFillAfter(true);
animSet.setFillEnabled(true);
final RotateAnimation animRotate = new RotateAnimation(0.0f, -90.0f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
animRotate.setDuration(1500);
animRotate.setFillAfter(true);
animSet.addAnimation(animRotate);
myImageView.startAnimation(animSet);