1. 定义旋转动画：

RotateAnimation rotateAnimation = new RotateAnimation(0, 359, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);

rotateAnimation.setDuration(1000); // 旋转一周所用的时间

rotateAnimation.setRepeatCount(Animation.INFINITE);// 无限次重复

2. 在代码中控制开始和停止旋转：

// 开始旋转
imageView.startAnimation(rotateAnimation);

// 停止旋转
imageView.clearAnimation();

注意：在停止旋转前，需要先判断是否存在正在运行的旋转动画。

完整的代码示例：

layout.xml

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private ImageView imageView;
    private RotateAnimation rotateAnimation;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageView = findViewById(R.id.imageView);

        rotateAnimation = new RotateAnimation(0, 359, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        rotateAnimation.setDuration(1000);
        rotateAnimation.setRepeatCount(Animation.INFINITE);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        // 释放资源
        imageView.clearAnimation();
        imageView.setImageBitmap(null);
        imageView.setImageDrawable(null);
    }

    public void startRotate(View view) {
        if (rotateAnimation != null && !rotateAnimation.hasStarted()) {
            imageView.startAnimation(rotateAnimation);
        }
    }

    public void stopRotate(View view) {
        if (rotateAnimation != null && rotateAnimation.hasStarted() && !rotateAnimation.hasEnded()) {
            imageView.clearAnimation();
        }
    }
}

其中，startRotate和stopRotate是两个按钮的点击事件，用于