android - 在Android中使用ImageView移动时如何使ImageView跟随我的手指并旋转？

Question

亲爱的android专家我想问你如何在移动时让ImageView旋转。我有飞机的照片。当我 touch_down 并随之移动时，ImageView 会跟随我的手指并动态旋转。当我手指向上触摸时，ImageView 平面向上旋转，当我向左触摸时，ImageView 动态向左旋转。请你给我指路好吗？我正在寻找一些示例，并且只能使用屏幕上的固定点，而不是移动对象。我正在使用示例，例如示例计算触摸点的角度并在 Android 中旋转它。但是我有移动的物体，你能帮忙吗？！[画出我需要的东西 - 动态跟随手指并旋转它][1]

Answer 1

尝试这个，

 public class abc extends Activity implements OnTouchListener 
    {
 ImageView img;
 protected void onCreate(Bundle savedInstanceState) 
 {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.one);

            img = (ImageView) findViewById(R.id.imageView1);
            img.setOnTouchListener(this);
 }

    public boolean onTouch(View v, MotionEvent event) 
{
    switch (event.getAction())
    {
        case MotionEvent.ACTION_DOWN:
        {       
              // Here u can write code which is executed after the user touch on the screen 
                 break; 
        }
        case MotionEvent.ACTION_UP:
        {             
               // Here u can write code which is executed after the user release the touch on the screen    
             break;
        }
        case MotionEvent.ACTION_MOVE:
        {  
           // Here u can write code which is executed when user move the finger on the screen   
            break;
        }
    }
    return true;
}

并检查此链接， http: //obviam.net/index.php/moving-images-on-the-screen-with-androi/