android 拖拽gridview,Android 可拖拽的GridView效果实现, 长按可拖拽和item实时交换

具体的原理描述，可以去看夏神的这个博文

效果图：

这里，采用了gridview的onLongItemClickListener，来拿到长按的view，用于拖动

解决了，原来实现中可能遇到的item消失问题

主要代码：

package com.stone.draggridview.my;

import android.app.Activity;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.Color;

import android.graphics.PixelFormat;

import android.graphics.Rect;

import android.os.Vibrator;

import android.util.AttributeSet;

import android.view.Gravity;

import android.view.MotionEvent;

import android.view.View;

import android.view.WindowManager;

import android.widget.AbsListView;

import android.widget.AdapterView;

import android.widget.GridView;

import android.widget.ImageView;

/**

* author : stone

* email : aa86799@163.com

* time : 16/4/27 17 38

*/

public class MyDragGridView extends GridView implements AdapterView.OnItemLongClickListener {

private WindowManager mWindowManager;

private WindowManager.LayoutParams mLayoutParams;

private int mStatusHeight;

private Vibrator mVibrator;

private int mOffset2Left;//gv距屏幕左

private int mOffset2Top;

private int mDownX;

private int mDownY;

private int mMoveX;

private int mMoveY;

private View mStartDragView;

private ImageView mImageView;

private int mDownScrollBorder;

private int mUpScrollBorder;

private boolean mIsDrag;

private OnChanageListener onChanageListener;

private int mDragPosition;

private View mLastHiddenView;

private int mSpeed = 30;

<