本文介绍了如何在其中心点旋转一个 android 图标?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小编来一起学习吧！
问题描述
我编写了以下内容以在屏幕中心旋转我的图标，而是围绕左上角旋转(即 ImageView 的原点 x=0、y=0).设置ImageView或者RotateAnimation的一些属性应该很简单，但是我想不通.
I have written the following to spin my icon on the center of the screen and instead it rotates around the upper-left corner (i.e., origin x=0, y=0 of the ImageView). It should be simple to set some attributes of the ImageView or the RotateAnimation, but I can't figure it out.
public class IconPromoActivity extends Activity {
private static final float ROTATE_FROM = 0.0f;
private static final float ROTATE_TO = -10.0f * 360.0f;// 3.141592654f * 32.0f;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView favicon = (ImageView) findViewById(R.id.favicon);
RotateAnimation r; // = new RotateAnimation(ROTATE_FROM, ROTATE_TO);
r = new RotateAnimation(ROTATE_FROM, ROTATE_TO, 0, 0, 40, 0);
r.setDuration((long) 2*1500);
r.setRepeatCount(0);
favicon.startAnimation(r);
}
}
推荐答案
试试:r = new RotateAnimation(ROTATE_FROM, ROTATE_TO, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
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