public class MyView extends Button{
//记录上次滑动后的坐标值
private int lastX;
private int lastY;

public MyView(Context context) {
  super(context);
  // TODO Auto-generated constructor stub
}
public MyView(Context context, AttributeSet attrs){

  super(context, attrs);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
  // 获取view相对于手机屏幕的xy值
  int x=(int) event.getRawX();
  int y=(int) event.getRawY();
  switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:

      break;
    case MotionEvent.ACTION_MOVE:
      int deltaX=x-lastX;
      int deltaY=y-lastY;
      int translationX = (int) (ViewHelper.getTranslationX(this) + deltaX);
      int translationY = (int) (ViewHelper.getTranslationY(this) + deltaY);
      ViewHelper.setTranslationX(this,translationX);
      ViewHelper.setTranslationY(this,translationY);

      break;
    case MotionEvent.ACTION_UP:
      break;
    default:
      break;
  }
  lastX = x;
  lastY = y;
  return true;
}

<?xml version="1.0" encoding="utf-8"?>