如何旋转中心点上的Android图标？

我已经写了以下旋转我的图标在屏幕的中心，而是绕左上angular旋转（即原点x = 0，y = 0的ImageView）。 设置ImageView或RotateAnimation的某些属性应该很简单，但我无法弄清楚。

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

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

Answer 2

这适用于我：

 img = (ImageView)findViewById(R.id.ImageView01); RotateAnimation rotateAnimation = new RotateAnimation(30, 90, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);