action_main

MyDragPicture

package wanghuiqi.bawie.com.whq_dalls; import android.annotation.SuppressLint;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ImageView; @SuppressLint("AppCompatCustomView") public class MyDragPicture extends ImageView { private int mDownX; private int mDownY; public MyDragPicture(Context context) { super(context); } public MyDragPicture(Context context, AttributeSet attrs) { super(context, attrs); } @Override public boolean onTouchEvent(MotionEvent event) { //获取手指处的横坐标和纵坐标 int x = (int) event.getX(); int y = (int) event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN://手指按下 mDownX = x; mDownY = y; break; case MotionEvent.ACTION_MOVE://手指移动 //计算移动的距离 int moveX = x - mDownX; int moveY = y - mDownY; //调用layout方法重新放置它的位置 movingXY(moveX,moveY); break; case MotionEvent.ACTION_UP: break; } return true; } private void movingXY(int moveX, int moveY) { //移动View layout(getLeft()+moveX,getTop()+moveY,getRight() +moveX,getBottom()+moveY); } }