Android 仿今日头条的频道管理

//主布局 activity_main.xml


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:id="@+id/subscribe_main_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:paddingBottom="14.0dp">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10.0dp"
                android:layout_marginTop="14.0dp"
                android:gravity="bottom"
                android:orientation="horizontal">


                <TextView
                    android:id="@+id/my_category_tip_text"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="我的频道"
                    android:textSize="13sp" />
            LinearLayout>

            <View
                android:id="@+id/seperate_line"
                android:layout_width="match_parent"
                android:layout_height="0.5dp"
                android:layout_marginBottom="14.0dp"
                android:layout_marginTop="10dp"
                android:background="@color/subscribe_item_drag_stroke" />

            <bawei.com.pindaoguanli.view.DragGridView
                android:id="@+id/userGridView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="14dp"
                android:layout_marginRight="14dp"
                android:gravity="center"
                android:horizontalSpacing="14dp"
                android:listSelector="@android:color/transparent"
                android:numColumns="4"
                android:scrollbars="vertical"
                android:stretchMode="columnWidth"
                android:verticalSpacing="14.0px" />

            <View
                android:id="@+id/seperate_line2"
                android:layout_width="match_parent"
                android:layout_height="0.5dp"
                android:layout_marginTop="10dp"
                android:background="@color/subscribe_item_drag_stroke" />

            <TextView
                android:id="@+id/more_category_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="14.0dp"
                android:layout_marginLeft="10.0dp"
                android:layout_marginTop="10dp"
                android:text="更多频道"
                android:textSize="13sp" />

            <bawei.com.pindaoguanli.view.MyGridView
                android:id="@+id/otherGridView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="14dp"
                android:layout_marginRight="14dp"
                android:gravity="center"
                android:horizontalSpacing="14dp"
                android:listSelector="@android:color/transparent"
                android:numColumns="4"
                android:scrollbars="vertical"
                android:stretchMode="columnWidth"
                android:verticalSpacing="14.0px" />
        LinearLayout>
    ScrollView>

RelativeLayout>

子布局 adapter_mygridview_item.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rl_subscribe"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:minHeight="38.0dip"
    android:minWidth="72.0dip">

    <TextView
        android:id="@+id/text_item"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="@drawable/subscribe_item_bg"
        android:gravity="center"
        android:minHeight="38.0dp"
        android:minWidth="72.0dp"
        android:textColor="@color/subscribe_item_text_color"
        android:textSize="14.0sp" />

    <ImageView
        android:id="@+id/icon_new"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone" />

RelativeLayout>

在res文件下建一个color文件
在color文件里件一个 subscribe_item_text_color.xml

<selector
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:color="@color/subscribe_item_selected_stroke" />
    <item android:state_pressed="true" android:color="@color/subscribe_item_text_color_pressed" />
    <item android:color="@color/subscribe_item_text_color_normal" />
selector>

在drawable里面建一个 subscribe_item_bg.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_enabled="true" android:state_selected="true">
        <layer-list>
            <item>
                <shape>
                    <stroke android:width="1.0dp" android:color="@color/subscribe_item_drag_stroke" android:dashGap="2.0dip" android:dashWidth="4.0dip" />
                    <solid android:color="@color/subscribe_item_drag_bg" />
                shape>
            item>
        layer-list>
    item>
    <item android:state_selected="true">
        <shape>
            <stroke android:width="1.0dp" android:color="@color/subscribe_item_selected_stroke" />
            <solid android:color="@color/subscribe_item_selected_bg" />
        shape>
    item>
    <item android:state_enabled="false">
        <shape>
            <stroke android:width="0.5dp" android:color="@color/subscribe_item_disabled_stroke" />
            <solid android:color="@color/subscribe_item_disabled_bg" />
        shape>
    item>
    <item android:state_pressed="true">
        <shape>
            <stroke android:width="0.5dp" android:color="@color/subscribe_item_pressed_stroke" />
            <solid android:color="@color/subscribe_item_pressed_bg" />
        shape>
    item>
    <item>
        <shape>
            <stroke android:width="0.5dip" android:color="@color/subscribe_item_normal_stroke" />
            <solid android:color="@color/subscribe_item_normal_bg" />
        shape>
    item>
selector>

在Value下 colors.xml
  <item name="subscribe_item_text_color_normal" type="color">@color/default_textitem>
    name="subscribe_item_text_color_pressed">#ffb9b9b9
    name="default_text">#ff454545
    name="subscribe_item_text_color_pressed_night">#ff303030
    name="subscribe_item_focused_stroke">#ffd9d9d9
    name="subscribe_item_drag_stroke">#ffd2d2d2
    name="subscribe_item_drag_bg">#fff5f5f5
    name="subscribe_item_drag_stroke_night">#ff464646
    name="subscribe_item_drag_bg_night">#ff252525
    name="subscribe_item_selected_bg">#ffffffff
    name="subscribe_item_selected_stroke">#ffcc3131
    name="subscribe_item_disabled_bg">#ffefefef
    name="subscribe_item_disabled_stroke">#ffd9d9d9
    name="subscribe_item_pressed_bg">#fff9f9f9
    name="subscribe_item_pressed_stroke">#ffcdcdcd
    name="subscribe_item_normal_bg">#fff5f5f5
    name="subscribe_item_normal_stroke">#ffcdcdcd
    name="subscribe_item_focused_bg_night">#ff252525
    name="subscribe_item_focused_stroke_night">#ff464646
    name="subscribe_item_selected_bg_night">#ff252525
    name="subscribe_item_selected_stroke_night">#ffbc494d
    name="subscribe_item_disabled_bg_night">#ff2b2b2b

在Values里面 dimens.xml
<resources>
    <dimen name="activity_horizontal_margin">16dpdimen>
    <dimen name="activity_vertical_margin">16dpdimen>
resources>

MainActivity
------------

package bawei.com.pindaoguanli;

import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;
import bawei.com.pindaoguanli.view.DragGridView;
import bawei.com.pindaoguanli.view.MyGridView;

public class MainActivity extends AppCompatActivity implements OnItemClickListener {
    private MyGridView mOtherGv;
    private DragGridView mUserGv;
    private List mUserList = new ArrayList<>();
    private List mOtherList = new ArrayList<>();
    private OtherAdapter mOtherAdapter;
    private DragAdapter  mUserAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    public void initView() {
        mUserGv = (DragGridView) findViewById(R.id.userGridView);
        mUserList.add("推荐");
        mUserList.add("热点");
        mUserList.add("上海");
        mUserList.add("时尚");
        mUserList.add("科技");
        mUserList.add("体育");
        mUserList.add("军事");
        mUserList.add("财经");
        mUserList.add("网络");
        mOtherGv = (MyGridView) findViewById(R.id.otherGridView);
        mOtherList.add("汽车");
        mOtherList.add("房产");
        mOtherList.add("社会");
        mOtherList.add("情感");
        mOtherList.add("女人");
        mOtherList.add("旅游");
        mOtherList.add("健康");
        mOtherList.add("美女");
        mOtherList.add("游戏");
        mOtherList.add("数码");
        mOtherList.add("娱乐");
        mOtherList.add("探索");
        mUserAdapter = new DragAdapter(this, mUserList,true);
        mOtherAdapter = new OtherAdapter(this, mOtherList,false);
        mUserGv.setAdapter(mUserAdapter);
        mOtherGv.setAdapter(mOtherAdapter);
        mUserGv.setOnItemClickListener(this);
        mOtherGv.setOnItemClickListener(this);
    }

    /**
     *获取点击的Item的对应View，
     *因为点击的Item已经有了自己归属的父容器MyGridView，所有我们要是有一个ImageView来代替Item移动
     * @param view
     * @return
     */
    private ImageView getView(View view) {
        view.destroyDrawingCache();
        view.setDrawingCacheEnabled(true);
        Bitmap cache = Bitmap.createBitmap(view.getDrawingCache());
        view.setDrawingCacheEnabled(false);
        ImageView iv = new ImageView(this);
        iv.setImageBitmap(cache);
        return iv;
    }
    /**
     * 获取移动的VIEW，放入对应ViewGroup布局容器
     * @param viewGroup
     * @param view
     * @param initLocation
     * @return
     */
    private View getMoveView(ViewGroup viewGroup, View view, int[] initLocation) {
        int x = initLocation[0];
        int y = initLocation[1];
        viewGroup.addView(view);
        LinearLayout.LayoutParams mLayoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        mLayoutParams.leftMargin = x;
        mLayoutParams.topMargin = y;
        view.setLayoutParams(mLayoutParams);
        return view;
    }

    /**
     * 创建移动的ITEM对应的ViewGroup布局容器
     * 用于存放我们移动的View
     */
    private ViewGroup getMoveViewGroup() {
        //window中最顶层的view
        ViewGroup moveViewGroup = (ViewGroup) getWindow().getDecorView();
        LinearLayout moveLinearLayout = new LinearLayout(this);
        moveLinearLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        moveViewGroup.addView(moveLinearLayout);
        return moveLinearLayout;
    }
    /**
     * 点击ITEM移动动画
     *
     * @param moveView
     * @param startLocation
     * @param endLocation
     * @param moveChannel
     * @param clickGridView
     */
    private void MoveAnim(View moveView, int[] startLocation, int[] endLocation, final String moveChannel,
                          final GridView clickGridView, final boolean isUser) {
        int[] initLocation = new int[2];
        //获取传递过来的VIEW的坐标
        moveView.getLocationInWindow(initLocation);
        //得到要移动的VIEW,并放入对应的容器中
        final ViewGroup moveViewGroup = getMoveViewGroup();
        final View mMoveView = getMoveView(moveViewGroup, moveView, initLocation);
        //创建移动动画
        TranslateAnimation moveAnimation = new TranslateAnimation(
                startLocation[0], endLocation[0], startLocation[1],
                endLocation[1]);
        moveAnimation.setDuration(300L);//动画时间
        //动画配置
        AnimationSet moveAnimationSet = new AnimationSet(true);
        moveAnimationSet.setFillAfter(false);//动画效果执行完毕后，View对象不保留在终止的位置
        moveAnimationSet.addAnimation(moveAnimation);
        mMoveView.startAnimation(moveAnimationSet);
        moveAnimationSet.setAnimationListener(new Animation.AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                moveViewGroup.removeView(mMoveView);
                // 判断点击的是DragGrid还是OtherGridView
                if (isUser) {
                    mOtherAdapter.setVisible(true);
                    mOtherAdapter.notifyDataSetChanged();
                    mUserAdapter.remove();
                } else {
                    mUserAdapter.setVisible(true);
                    mUserAdapter.notifyDataSetChanged();
                    mOtherAdapter.remove();
                }
            }
        });
    }

    @Override
    public void onItemClick(AdapterView parent, View view, final int position, long id) {
        switch (parent.getId()) {
            case R.id.userGridView:
                //position为 0，1 的不可以进行任何操作
                if (position != 0 && position !=1) { //改为-1前2个就可以移出的
                    final ImageView moveImageView = getView(view);
                    if (moveImageView != null) {
                        TextView newTextView = (TextView) view.findViewById(R.id.text_item);//
                        final int[] startLocation = new int[2];
                        newTextView.getLocationInWindow(startLocation);
                        final String channel = ((DragAdapter) parent.getAdapter()).getItem(position);//获取点击的频道内容
                        Toast.makeText(this, channel+"dsa", Toast.LENGTH_SHORT).show();
                        mOtherAdapter.setVisible(false);
                        //添加到最后一个
                        mOtherAdapter.addItem(channel);
                        new Handler().postDelayed(new Runnable() {
                            public void run() {
                                try {
                                    int[] endLocation = new int[2];
                                    //获取终点的坐标
                                    mOtherGv.getChildAt(mOtherGv.getLastVisiblePosition()).getLocationInWindow(endLocation);
                                    MoveAnim(moveImageView, startLocation, endLocation, channel, mUserGv, true);
                                    mUserAdapter.setRemove(position);
                                } catch (Exception localException) {
                                }
                            }
                        }, 50L);
                    }
                }
                break;
            case R.id.otherGridView:
                final ImageView moveImageView = getView(view);
                if (moveImageView != null) {
                    TextView newTextView = (TextView) view.findViewById(R.id.text_item);
                    final int[] startLocation = new int[2];
                    newTextView.getLocationInWindow(startLocation);
                    final String channel = ((OtherAdapter) parent.getAdapter()).getItem(position);
                    mUserAdapter.setVisible(false);
                    Toast.makeText(this, channel+"dsa", Toast.LENGTH_SHORT).show();
                    //添加到最后一个
                    mUserAdapter.addItem(channel);
                    new Handler().postDelayed(new Runnable() {
                        public void run() {
                            try {
                                int[] endLocation = new int[2];
                                //获取终点的坐标
                                mUserGv.getChildAt(mUserGv.getLastVisiblePosition()).getLocationInWindow(endLocation);
                                MoveAnim(moveImageView, startLocation, endLocation, channel, mOtherGv,false);
                                mOtherAdapter.setRemove(position);
                            } catch (Exception localException) {
                            }
                        }
                    }, 50L);
                }
                break;
            default:
                break;
        }
    }
}

**我的频道适配器**
package bawei.com.pindaoguanli;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;

public class DragAdapter extends BaseAdapter {
    /** TAG*/
    private final static String TAG = "DragAdapter";
    /** 是否显示底部的ITEM */
    private boolean isItemShow = false;
    private Context context;
    /** 控制的postion */
    private int holdPosition;
    /** 是否改变 */
    private boolean isChanged = false;
    /** 列表数据是否改变 */
    private boolean isListChanged = false;
    /** 是否可见 */
    boolean isVisible = true;
    /** 可以拖动的列表（即用户选择的频道列表） */
    public List channelList;
    /** TextView 频道内容 */
    private TextView item_text;
    /** 要删除的position */
    public int remove_position = -1;
    /** 是否是用户频道 */
    private boolean isUser = false;
    public DragAdapter(Context context, List channelList,boolean isUser) {
        this.context = context;
        this.channelList = channelList;
        this.isUser = isUser;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return channelList == null ? 0 : channelList.size();
    }

    @Override
    public String getItem(int position) {
        // TODO Auto-generated method stub
        if (channelList != null && channelList.size() != 0) {
            return channelList.get(position);
        }
        return null;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = LayoutInflater.from(context).inflate(R.layout.adapter_mygridview_item, null);
        item_text = (TextView) view.findViewById(R.id.text_item);
        String channel = getItem(position);
        item_text.setText(channel);
        if(isUser){
            if ((position == 0) || (position == 1)){
                item_text.setEnabled(false);
            }
        }
        if (isChanged && (position == holdPosition) && !isItemShow) {
            item_text.setText("");
            item_text.setSelected(true);
            item_text.setEnabled(true);
            isChanged = false;
        }
        if (!isVisible && (position == -1 + channelList.size())) {
            item_text.setText("");
            item_text.setSelected(true);
            item_text.setEnabled(true);
        }
        if(remove_position == position){
            item_text.setText("");
        }
        return view;
    }

    /** 添加频道列表 */
    public void addItem(String channel) {
        channelList.add(channel);
        isListChanged = true;
        notifyDataSetChanged();
    }

    /** 拖动变更频道排序 */
    public void exchange(int dragPostion, int dropPostion) {
        holdPosition = dropPostion;
        String dragItem = getItem(dragPostion);
        Log.d(TAG, "startPostion=" + dragPostion + ";endPosition=" + dropPostion);
        if (dragPostion < dropPostion) {
            channelList.add(dropPostion + 1, dragItem);
            channelList.remove(dragPostion);
        } else {
            channelList.add(dropPostion, dragItem);
            channelList.remove(dragPostion + 1);
        }
        isChanged = true;
        isListChanged = true;
        notifyDataSetChanged();
    }

    /** 获取频道列表 */
    public List getChannnelLst() {
        return channelList;
    }

    /** 设置删除的position */
    public void setRemove(int position) {
        remove_position = position;
        notifyDataSetChanged();
    }

    /** 删除频道列表 */
    public void remove() {
        channelList.remove(remove_position);
        remove_position = -1;
        isListChanged = true;
        notifyDataSetChanged();
    }

    /** 设置频道列表 */
    public void setListDate(List list) {
        channelList = list;
    }

    /** 获取是否可见 */
    public boolean isVisible() {
        return isVisible;
    }

    /** 排序是否发生改变 */
    public boolean isListChanged() {
        return isListChanged;
    }

    /** 设置是否可见 */
    public void setVisible(boolean visible) {
        isVisible = visible;
    }
    /** 显示放下的ITEM */
    public void setShowDropItem(boolean show) {
        isItemShow = show;
    }
}

**更多频道的适配器**
package bawei.com.pindaoguanli;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;
/**
 * Created by fuweiwei on 2016/1/8.
 */
public class OtherAdapter extends BaseAdapter {

    private Context context;
    public List channelList;
    private TextView item_text;
    /** 是否可见 在移动动画完毕之前不可见，动画完毕后可见*/
    boolean isVisible = true;
    /** 要删除的position */
    public int remove_position = -1;
    /** 是否是用户频道 */
    private boolean isUser = false;

    public OtherAdapter(Context context, List channelList ,boolean isUser) {
        this.context = context;
        this.channelList = channelList;
        this.isUser = isUser;
    }

    @Override
    public int getCount() {
        return channelList == null ? 0 : channelList.size();
    }

    @Override
    public String getItem(int position) {
        if (channelList != null && channelList.size() != 0) {
            return channelList.get(position);
        }
        return null;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = LayoutInflater.from(context).inflate(R.layout.adapter_mygridview_item, null);
        item_text = (TextView) view.findViewById(R.id.text_item);
        String channel = getItem(position);
        item_text.setText(channel);
        if(isUser){
            if ((position == 0) || (position == 1)){
                item_text.setEnabled(false);
            }
        }
        if (!isVisible && (position == -1 + channelList.size())){
            item_text.setText("");
            item_text.setSelected(true);
            item_text.setEnabled(true);
        }
        if(remove_position == position){
            item_text.setText("");
        }
        return view;
    }

    /** 获取频道列表 */
    public List getChannnelLst() {
        return channelList;
    }

    /** 添加频道列表 */
    public void addItem(String channel) {
        channelList.add(channel);
        notifyDataSetChanged();
    }

    /** 设置删除的position */
    public void setRemove(int position) {
        remove_position = position;
        notifyDataSetChanged();
        // notifyDataSetChanged();
    }

    /** 删除频道列表 */
    public void remove() {
        channelList.remove(remove_position);
        remove_position = -1;
        notifyDataSetChanged();
    }
    /** 设置频道列表 */
    public void setListDate(List list) {
        channelList = list;
    }

    /** 获取是否可见 */
    public boolean isVisible() {
        return isVisible;
    }

    /** 设置是否可见 */
    public void setVisible(boolean visible) {
        isVisible = visible;
    }

}

**自定义我的频道GridView**

package bawei.com.pindaoguanli.view;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.PixelFormat;
import android.os.Vibrator;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;

import bawei.com.pindaoguanli.DragAdapter;
import bawei.com.pindaoguanli.R;


/**
 * Created by fuweiwei on 2016/1/9.
 */
public class DragGridView extends GridView{
    /** 点击时候的X位置 */
    public int downX;
    /** 点击时候的Y位置 */
    public int downY;
    /** 点击时候对应整个界面的X位置 */
    public int windowX;
    /** 点击时候对应整个界面的Y位置 */
    public int windowY;
    /** VIEW相对自己的X */
    private int win_view_x;
    /**VIEW相对自己的Y*/
    private int win_view_y;
    /** 长按时候对应postion */
    public int dragPosition;
    /** Up后对应的ITEM的Position */
    private int dropPosition;
    /** 开始拖动的ITEM的Position*/
    private int startPosition;
    /** item高 */
    private int itemHeight;
    /** item宽 */
    private int itemWidth;
    /** 拖动的时候对应ITEM的VIEW */
    private View dragImageView = null;
    /** 长按的时候ITEM的VIEW*/
    private ViewGroup dragItemView = null;
    /** WindowManager管理器 */
    private WindowManager windowManager = null;
    /** */
    private WindowManager.LayoutParams windowParams = null;
    /** item总量*/
    private int itemTotalCount;
    /** 一行的ITEM数量*/
    private int nColumns = 4;
    /** 行数 */
    private int nRows;
    /** 剩余部分 */
    private int Remainder;
    /** 是否在移动 */
    private boolean isMoving = false;
    /** */
    private int holdPosition;
    /** 拖动的时候放大的倍数 */
    private double dragScale = 1.2D;
    /** 震动器  */
    private Vibrator mVibrator;
    /** 每个ITEM之间的水平间距 */
    private int mHorizontalSpacing = 15;
    /** 每个ITEM之间的竖直间距 */
    private int mVerticalSpacing = 15;
    /** 移动时候最后个动画的ID */
    private String LastAnimationID;
    public DragGridView(Context context) {
        super(context);
        init(context);
    }

    public DragGridView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context);
    }

    public DragGridView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }
    /**
     * dip转为 px
     */
    public  int dip2px(Context context, float dipValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dipValue * scale + 0.5f);
    }

    public void init(Context context){
        mVibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
        //将布局文件中设置的间距dip转为px
        mHorizontalSpacing = dip2px(context, mHorizontalSpacing);
    }
    /** 在ScrollView内，所以要进行计算高度 */
    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }
    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            downX = (int) ev.getX();
            downY = (int) ev.getY();
            windowX = (int) ev.getX();
            windowY = (int) ev.getY();
            setOnItemClickListener(ev);
        }
        return super.dispatchTouchEvent(ev);
    }
    /** 停止拖动 ，释放并初始化 */
    private void stopDrag() {
        if (dragImageView != null) {
            windowManager.removeView(dragImageView);
            dragImageView = null;
        }
    }

    /** 在拖动的情况更新View的位置 */
    private void onDrag(int x, int y , int rawx , int rawy) {
        if (dragImageView != null) {
            windowParams.alpha = 0.6f;
            windowParams.x = rawx - win_view_x;
            windowParams.y = rawy - win_view_y;
            windowManager.updateViewLayout(dragImageView, windowParams);
        }
    }

    /**
     *创建窗口对象、添加我们要移动的View
     * @param dragBitmap
     * @param x
     * @param y
     */
    public void startDrag(Bitmap dragBitmap, int x, int y) {
        stopDrag();
        windowParams = new WindowManager.LayoutParams();// 获取WINDOW界面的
        //Gravity.TOP|Gravity.LEFT;这个必须加
        windowParams.gravity = Gravity.TOP | Gravity.LEFT;
        //得到要移动的View左上角相对于屏幕的坐标
        windowParams.x = x - win_view_x;
        windowParams.y = y  - win_view_y;
        //设置拖拽item的宽和高
        windowParams.width = (int) (dragScale * dragBitmap.getWidth());// 放大dragScale倍，可以设置拖动后的倍数
        windowParams.height = (int) (dragScale * dragBitmap.getHeight());// 放大dragScale倍，可以设置拖动后的倍数
        this.windowParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
                | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
        this.windowParams.format = PixelFormat.TRANSLUCENT;
        this.windowParams.windowAnimations = 0;
        ImageView iv = new ImageView(getContext());
        iv.setImageBitmap(dragBitmap);
        windowManager = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);// "window"
        windowManager.addView(iv, windowParams);
        dragImageView = iv;
    }
    /** 隐藏 放下 的ITEM*/
    private void hideDropItem() {
        ((DragAdapter) getAdapter()).setShowDropItem(false);
    }

    /** 在松手下放的情况，更新界面 */
    private void onDrop(int x, int y) {
        // 根据拖动到的x,y坐标获取拖动位置下方的ITEM对应的POSTION
        int tempPostion = pointToPosition(x, y);
//      if (tempPostion != AdapterView.INVALID_POSITION) {
        dropPosition = tempPostion;
        DragAdapter mDragAdapter = (DragAdapter) getAdapter();
        //显示刚拖动的ITEM
        mDragAdapter.setShowDropItem(true);
        //刷新适配器，让对应的ITEM显示
        mDragAdapter.notifyDataSetChanged();
//      }
    }
    /**
     * 长按点击监听
     * @param ev
     */
    public void setOnItemClickListener(final MotionEvent ev) {
        setOnItemLongClickListener(new OnItemLongClickListener() {

            @Override
            public boolean onItemLongClick(AdapterView parent, View view, int position, long id) {
                int x = (int) ev.getX();// 长按事件的X位置
                int y = (int) ev.getY();// 长按事件的y位置
                startPosition = position;// 第一次点击的postion
                dragPosition = position;
                if (startPosition <= 1) {//前2个默认不点击、可以设置
                    return false;
                }
                ViewGroup dragViewGroup = (ViewGroup) getChildAt(dragPosition - getFirstVisiblePosition());
                TextView dragTextView = (TextView)dragViewGroup.findViewById(R.id.text_item);
                dragTextView.setSelected(true);
                dragTextView.setEnabled(false);
                itemHeight = dragViewGroup.getHeight();
                itemWidth = dragViewGroup.getWidth();
                itemTotalCount = DragGridView.this.getCount();
                // 如果特殊的这个不等于拖动的那个,并且不等于-1
                if (dragPosition != AdapterView.INVALID_POSITION) {
                    // 释放的资源使用的绘图缓存。如果你调用buildDrawingCache()手动没有调用setDrawingCacheEnabled(真正的),你应该清理缓存使用这种方法。
                    win_view_x = windowX - dragViewGroup.getLeft();//VIEW相对自己的X，半斤
                    win_view_y = windowY - dragViewGroup.getTop();//VIEW相对自己的y，半斤
                    dragItemView = dragViewGroup;
                    dragViewGroup.destroyDrawingCache();
                    dragViewGroup.setDrawingCacheEnabled(true);
                    Bitmap dragBitmap = Bitmap.createBitmap(dragViewGroup.getDrawingCache());
                    mVibrator.vibrate(50);//设置震动时间
                    startDrag(dragBitmap, (int)ev.getRawX(),  (int)ev.getRawY());
                    hideDropItem();
                    dragViewGroup.setVisibility(View.INVISIBLE);
                    isMoving = false;
                    return true;
                }
                return false;
            }
        });
    }
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (dragImageView != null && dragPosition != AdapterView.INVALID_POSITION) {
            // 移动时候的对应x,y位置
            int x = (int) ev.getX();
            int y = (int) ev.getY();
            switch (ev.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    downX = (int) ev.getX();
                    windowX = (int) ev.getX();
                    downY = (int) ev.getY();
                    windowY = (int) ev.getY();
                    break;
                case MotionEvent.ACTION_MOVE:
                    onDrag(x, y ,(int) ev.getRawX() , (int) ev.getRawY());
                    if (!isMoving){
                        OnMove(x, y);
                    }
                    if (pointToPosition(x, y) != AdapterView.INVALID_POSITION){
                        break;
                    }
                    break;
                case MotionEvent.ACTION_UP:
                    stopDrag();
                    onDrop(x, y);
                    requestDisallowInterceptTouchEvent(false);
                    break;

                default:
                    break;
            }
        }
        return super.onTouchEvent(ev);
    }
    /** 移动的时候触发，移动所有改变的Item*/
    public void OnMove(int x, int y) {
        // 拖动的VIEW下方的POSTION
        int dPosition = pointToPosition(x, y);
        // 判断下方的POSTION是否是最开始2个不能拖动的
        if (dPosition > 1) {
            if ((dPosition == -1) || (dPosition == dragPosition)){
                return;
            }
            dropPosition = dPosition;
            if (dragPosition != startPosition){
                dragPosition = startPosition;
            }
            int movecount;
            //拖动的=开始拖的，并且 拖动的 不等于放下的
            if ((dragPosition == startPosition) || (dragPosition != dropPosition)){
                //移需要移动的动ITEM数量
                movecount = dropPosition - dragPosition;
            }else{
                //移需要移动的动ITEM数量为0
                movecount = 0;
            }
            if(movecount == 0){
                return;
            }
            int movecount_abs = Math.abs(movecount);
            if (dPosition != dragPosition) {
                //dragGroup设置为不可见
                ViewGroup dragGroup = (ViewGroup) getChildAt(dragPosition);
                dragGroup.setVisibility(View.INVISIBLE);
                float to_x = 1;//移动的X偏移量
                float to_y;// 移动的Y偏移量
                //x_vlaue移动的距离百分比（相对于自己长度的百分比）
                float x_vlaue = ((float) mHorizontalSpacing / (float) itemWidth) + 1.0f;
                //y_vlaue移动的距离百分比（相对于自己宽度的百分比）
                float y_vlaue = ((float) mVerticalSpacing / (float) itemHeight) + 1.0f;
                Log.d("x_vlaue", "x_vlaue = " + x_vlaue);
                for (int i = 0; i < movecount_abs; i++) {
                    to_x = x_vlaue;
                    to_y = y_vlaue;
                    //向右
                    if (movecount > 0) {
                        // 判断是不是同一行的
                        holdPosition = dragPosition + i + 1;
                        if (dragPosition / nColumns == holdPosition / nColumns) {
                            to_x = - x_vlaue;
                            to_y = 0;
                        } else if (holdPosition % 4 == 0) {
                            to_x = 3 * x_vlaue;
                            to_y = - y_vlaue;
                        } else {
                            to_x = - x_vlaue;
                            to_y = 0;
                        }
                    }else{
                        //向左,下移到上，右移到左
                        holdPosition = dragPosition - i - 1;
                        if (dragPosition / nColumns == holdPosition / nColumns) {
                            to_x = x_vlaue;
                            to_y = 0;
                        } else if((holdPosition + 1) % 4 == 0){
                            to_x = -3 * x_vlaue;
                            to_y = y_vlaue;
                        }else{
                            to_x = x_vlaue;
                            to_y = 0;
                        }
                    }
                    ViewGroup moveViewGroup = (ViewGroup) getChildAt(holdPosition);
                    Animation moveAnimation = getMoveAnimation(to_x, to_y);
                    moveViewGroup.startAnimation(moveAnimation);
                    //如果是最后一个移动的，那么设置他的最后个动画ID为LastAnimationID
                    if (holdPosition == dropPosition) {
                        LastAnimationID = moveAnimation.toString();
                    }
                    moveAnimation.setAnimationListener(new Animation.AnimationListener() {

                        @Override
                        public void onAnimationStart(Animation animation) {
                            isMoving = true;
                        }

                        @Override
                        public void onAnimationRepeat(Animation animation) {

                        }

                        @Override
                        public void onAnimationEnd(Animation animation) {
                            // 如果为最后个动画结束，那执行下面的方法
                            if (animation.toString().equalsIgnoreCase(LastAnimationID)) {
                                DragAdapter mDragAdapter = (DragAdapter) getAdapter();
                                mDragAdapter.exchange(startPosition,dropPosition);
                                startPosition = dropPosition;
                                dragPosition = dropPosition;
                                isMoving = false;
                            }
                        }
                    });
                }
            }
        }
    }
    /** 获取移动的动画 */
    public Animation getMoveAnimation(float toXValue, float toYValue) {
        TranslateAnimation mTranslateAnimation = new TranslateAnimation(
                Animation.RELATIVE_TO_SELF, 0.0F,
                Animation.RELATIVE_TO_SELF,toXValue,
                Animation.RELATIVE_TO_SELF, 0.0F,
                Animation.RELATIVE_TO_SELF, toYValue);// 当前位置移动到指定位置
        mTranslateAnimation.setFillAfter(true);// 设置一个动画效果执行完毕后，View对象保留在终止的位置。
        mTranslateAnimation.setDuration(300L);
        return mTranslateAnimation;
    }
}

更多的频道的GridView
package bawei.com.pindaoguanli.view;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.GridView;

/**
 * Created by fuweiwei on 2016/1/8.
 */
public class MyGridView extends GridView {
    public MyGridView(Context paramContext, AttributeSet paramAttributeSet) {
        super(paramContext, paramAttributeSet);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }
}