本文介绍了以编程方式旋转可绘制对象或视图的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!
问题描述
<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可绘制对象.
I want programmatically rotate the drawable.
我该怎么做?
这是我的回调
private class RotateListener implements RotateGestureDetector.OnRotateGestureListener{
@Override
public boolean onRotate(MotionEvent event1, MotionEvent event2,
double deltaAngle) {
return true;
}
}
deltaangle
不超过0.1,我不确定提取值是多少.
The deltaangle
not more than 0.1, I not sure what is the extract value.
推荐答案
以下代码围绕 ImageView 的中心旋转:
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);
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