使用动画实现View的拖动
@Override
public boolean onTouchEvent(MotionEvent event) {
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 - mLastX;
int deltaY = y - mLastY;
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;
}
mLastX = x;
mLastY = y;
return true;
}
重写View中onTouchEvent方法，通过getRawX()和getRawY()获取手指当前坐标。
使用动画兼容库NineOldAndroids中的ViewHelper类所提供的setTranslationX()和setTranslationY()进行View的移动
