android - 如何在其中心点旋转一个 android 图标？

Question

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。

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);
    }
}

Answer 1

尝试:r = new RotateAnimation(ROTATE_FROM, ROTATE_TO, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);