新闻阅读器频道管理

港控/mmm° 2022-07-14 04:08 152阅读 0赞

原文链接：[http://blog.csdn.net/vipzjyno1/article/details/25005851][http_blog.csdn.net_vipzjyno1_article_details_25005851]

![新闻客户端频道选择][1399250647_1821.gif]

本例子实现的功能是很多新闻阅读器（网易，今日头条，360新闻等）以及腾讯视频等里面都会出现的频道管理功能,点击可以增删频道，长按拖拽排序。下面的效果图没有拖拽的时候的移动动画，DEMO里面有，可以下载看看  
实现思路：

*  获取数据库中频道的列表，如果为空，赋予默认列表，并存入数据库，之后通过对应的适配器赋给对应的GridView
 *  2个GridView–（1.DragGrid 2. OtherGridView）  
    DragGrid 用于显示我的频道，带有长按拖拽效果  
    OtherGridView用于显示更多频道，不带推拽效果  
    注：由于屏幕大小不一定，外层使用ScrollView，所以2者都要重写计算高度
 *  点击2个GridView的时候，根据点击的Item对应的position，获取position对应的view，进行创建一层移动的动画层  
    起始位置：点击的positiongetLocationInWindow（）获取。终点位置：另一个GridView的最后个ITEM 的position + 1的位置。  
    并赋予移动动画，等动画结束后对2者对应的频道列表进行数据的remove和add操作。
 *  设置点击和拖动的限制条件，如 推荐 这个ITEM是不允许用户操作的。
 *  拖动的DragGrid的操作：

1、长按获取长按的ITEM的position — dragPosition 以及对应的view ，手指触摸屏幕的时候，调用onInterceptTouchEvent来获取MotionEvent.ACTION\_DOWN事件，获取对应的数据。由于这里是继承了GridView，所以长按时间可以通过setOnItemLongClickListener监听来执行，或则你也可以通过计算点击时间来监听是否长按。

2、通过onTouchEvent(MotionEvent ev)来监听手指的移动和抬起动作。当它移动到 其它的item下面，并且下方的item对应的position 不等于 dragPosition，进行数据交换，并且2者之间的所有item进行移动动画，动画结束后，数据更替刷新界面。

3、抬起手后，清除掉拖动时候创建的view，让GridView中的数据显示。

*  退出时候，将改变后的频道列表存入数据库

## DragGrid ##

public class DragGrid 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;
        /** 屏幕上的X */
        private int win_view_x;
        /** 屏幕上的Y*/
        private int win_view_y;
        /** 拖动的里x的距离 */
        int dragOffsetX;
        /** 拖动的里Y的距离 */
        int dragOffsetY;
        /** 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 DragGrid(Context context) {
            super(context);
            init(context);
        }
    
        public DragGrid(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
            init(context);
        }
    
        public DragGrid(Context context, AttributeSet attrs) {
            super(context, attrs);
            init(context);
        }
    
        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 = DataTools.dip2px(context, mHorizontalSpacing);
        }
    
        @Override
        public boolean onInterceptTouchEvent(MotionEvent ev) {
            // TODO Auto-generated method stub
            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.onInterceptTouchEvent(ev);
        }
    
        @Override
        public boolean onTouchEvent(MotionEvent ev) {
            // TODO Auto-generated method stub
            boolean bool = true;
            if (dragImageView != null && dragPosition != AdapterView.INVALID_POSITION) {
                // 移动时候的对应x,y位置
                bool = super.onTouchEvent(ev);
                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);
        }
    
        /** 在拖动的情况 */
        private void onDrag(int x, int y , int rawx , int rawy) {
            if (dragImageView != null) {
                windowParams.alpha = 0.6f;
    // windowParams.x = rawx - itemWidth / 2;
    // windowParams.y = rawy - itemHeight / 2;
                windowParams.x = rawx - win_view_x;
                windowParams.y = rawy - win_view_y;
                windowManager.updateViewLayout(dragImageView, windowParams);
            }
        }
    
        /** 在松手下放的情况 */
        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();// 长安事件的X位置
                    int y = (int) ev.getY();// 长安事件的y位置
    
                    startPosition = position;// 第一次点击的postion
                    dragPosition = position;
                    if (startPosition <= 1) {
                        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 = DragGrid.this.getCount();
                    int row = itemTotalCount / nColumns;// 算出行数
                    Remainder = (itemTotalCount % nColumns);// 算出最后一行多余的数量
                    if (Remainder != 0) {
                        nRows = row + 1;
                    } else {
                        nRows = row;
                    }
                    // 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
                        dragOffsetX = (int) (ev.getRawX() - x);//手指在屏幕的上X位置-手指在控件中的位置就是距离最左边的距离
                        dragOffsetY = (int) (ev.getRawY() - y);//手指在屏幕的上y位置-手指在控件中的位置就是距离最上边的距离
                        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;
                        requestDisallowInterceptTouchEvent(true);
                        return true;
                    }
                    return false;
                }
            });
        }
    
        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;
    // windowParams.x = x - (int)((itemWidth / 2) * dragScale);
    // windowParams.y = y - (int) ((itemHeight / 2) * dragScale);
            //得到preview左上角相对于屏幕的坐标 
            windowParams.x = x - win_view_x;
            windowParams.y = y  - win_view_y; 
    // this.windowParams.x = (x - this.win_view_x + this.viewX);//位置的x值
    // this.windowParams.y = (y - this.win_view_y + this.viewY);//位置的y值
            //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;
        }
    
        /** 停止拖动 ，释放并初始化 */
        private void stopDrag() {
            if (dragImageView != null) {
                windowManager.removeView(dragImageView);
                dragImageView = null;
            }
        }
    
        /** 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);
        }
    
        /** 隐藏 放下 的ITEM*/
        private void hideDropItem() {
            ((DragAdapter) getAdapter()).setShowDropItem(false);
        }
    
        /** 获取移动动画 */
        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;
        }
    
        /** 移动的时候触发*/
        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;// 当前下方positon
                    float to_y;// 当前下方右边positon
                    //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;
                        //像左
                        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{
                            //向右,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 AnimationListener() {
    
                            @Override
                            public void onAnimationStart(Animation animation) {
                                // TODO Auto-generated method stub
                                isMoving = true;
                            }
    
                            @Override
                            public void onAnimationRepeat(Animation animation) {
                                // TODO Auto-generated method stub
    
                            }
    
                            @Override
                            public void onAnimationEnd(Animation animation) {
                                // TODO Auto-generated method stub
                                // 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;
                                }
                            }
                        });
                    }
                }
            }
        }
    }

## OtherGridView ##

public class OtherGridView extends GridView { 
    
        public OtherGridView(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);
        }
    }

## ChannelActivity ##

public class ChannelActivity extends Activity implements OnItemClickListener { 
        /** 用户栏目的GRIDVIEW */
        private DragGrid userGridView;
        /** 其它栏目的GRIDVIEW */
        private OtherGridView otherGridView;
        /** 用户栏目对应的适配器，可以拖动 */
        DragAdapter userAdapter;
        /** 其它栏目对应的适配器 */
        OtherAdapter otherAdapter;
        /** 其它栏目列表 */
        ArrayList<ChannelItem> otherChannelList = new ArrayList<ChannelItem>();
        /** 用户栏目列表 */
        ArrayList<ChannelItem> userChannelList = new ArrayList<ChannelItem>();
        /** 是否在移动，由于这边是动画结束后才进行的数据更替，设置这个限制为了避免操作太频繁造成的数据错乱。 */ 
        boolean isMove = false;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.subscribe_activity);
            initView();
            initData();
        }
    
        /** 初始化数据*/
        private void initData() {
            userChannelList = ((ArrayList<ChannelItem>)ChannelManage.getManage(AppApplication.getApp().getSQLHelper()).getUserChannel());
            otherChannelList = ((ArrayList<ChannelItem>)ChannelManage.getManage(AppApplication.getApp().getSQLHelper()).getOtherChannel());
            userAdapter = new DragAdapter(this, userChannelList);
            userGridView.setAdapter(userAdapter);
            otherAdapter = new OtherAdapter(this, otherChannelList);
            otherGridView.setAdapter(this.otherAdapter);
            //设置GRIDVIEW的ITEM的点击监听
            otherGridView.setOnItemClickListener(this);
            userGridView.setOnItemClickListener(this);
        }
    
        /** 初始化布局*/
        private void initView() {
            userGridView = (DragGrid) findViewById(R.id.userGridView);
            otherGridView = (OtherGridView) findViewById(R.id.otherGridView);
        }
    
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.main, menu);
            return true;
        }
    
        /** GRIDVIEW对应的ITEM点击监听接口 */
        @Override
        public void onItemClick(AdapterView<?> parent, final View view, final int position,long id) {
            //如果点击的时候，之前动画还没结束，那么就让点击事件无效
            if(isMove){
                return;
            }
            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) {
                    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 ChannelItem channel = ((DragAdapter) parent.getAdapter()).getItem(position);//获取点击的频道内容
                        otherAdapter.setVisible(false);
                        //添加到最后一个
                        otherAdapter.addItem(channel);
                        new Handler().postDelayed(new Runnable() {
                            public void run() {
                                try {
                                    int[] endLocation = new int[2];
                                    //获取终点的坐标
                                    otherGridView.getChildAt(otherGridView.getLastVisiblePosition()).getLocationInWindow(endLocation);
                                    MoveAnim(moveImageView, startLocation , endLocation, channel,userGridView);
                                    userAdapter.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 ChannelItem channel = ((OtherAdapter) parent.getAdapter()).getItem(position);
                    userAdapter.setVisible(false);
                    //添加到最后一个
                    userAdapter.addItem(channel);
                    new Handler().postDelayed(new Runnable() {
                        public void run() {
                            try {
                                int[] endLocation = new int[2];
                                //获取终点的坐标
                                userGridView.getChildAt(userGridView.getLastVisiblePosition()).getLocationInWindow(endLocation);
                                MoveAnim(moveImageView, startLocation , endLocation, channel,otherGridView);
                                otherAdapter.setRemove(position);
                            } catch (Exception localException) {
                            }
                        }
                    }, 50L);
                }
                break;
            default:
                break;
            }
        }
        /** * 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 ChannelItem moveChannel,
                final GridView clickGridView) {
            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 AnimationListener() {
    
                @Override
                public void onAnimationStart(Animation animation) {
                    isMove = true;
                }
    
                @Override
                public void onAnimationRepeat(Animation animation) {
                }
    
                @Override
                public void onAnimationEnd(Animation animation) {
                    moveViewGroup.removeView(mMoveView);
                    // instanceof 方法判断2边实例是不是一样，判断点击的是DragGrid还是OtherGridView
                    if (clickGridView instanceof DragGrid) {
                        otherAdapter.setVisible(true);
                        otherAdapter.notifyDataSetChanged();
                        userAdapter.remove();
                    }else{
                        userAdapter.setVisible(true);
                        userAdapter.notifyDataSetChanged();
                        otherAdapter.remove();
                    }
                    isMove = false;
                }
            });
        }
    
        /** * 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(LayoutParams.WRAP_CONTENT, 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 */
        private ViewGroup getMoveViewGroup() {
            ViewGroup moveViewGroup = (ViewGroup) getWindow().getDecorView();
            LinearLayout moveLinearLayout = new LinearLayout(this);
            moveLinearLayout.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
            moveViewGroup.addView(moveLinearLayout);
            return moveLinearLayout;
        }
    
        /** * 获取点击的Item的对应View， * @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;
        }
    
        /** 退出时候保存选择后数据库的设置 */
        private void saveChannel() {
            ChannelManage.getManage(AppApplication.getApp().getSQLHelper()).deleteAllChannel();
            ChannelManage.getManage(AppApplication.getApp().getSQLHelper()).saveUserChannel(userAdapter.getChannnelLst());
            ChannelManage.getManage(AppApplication.getApp().getSQLHelper()).saveOtherChannel(otherAdapter.getChannnelLst());
        }
    
        @Override
        public void onBackPressed() {
            saveChannel();
            super.onBackPressed();
        }
    }

## DragAdapter ##

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;
        /** 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<ChannelItem> channelList;
        /** TextView 频道内容 */
        private TextView item_text;
        /** 要删除的position */
        public int remove_position = -1;
    
        public DragAdapter(Context context, List<ChannelItem> channelList) {
            this.context = context;
            this.channelList = channelList;
        }
    
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return channelList == null ? 0 : channelList.size();
        }
    
        @Override
        public ChannelItem 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.subscribe_category_item, null);
            item_text = (TextView) view.findViewById(R.id.text_item);
            ChannelItem channel = getItem(position);
            item_text.setText(channel.getName());
            if ((position == 0) || (position == 1)){
    // item_text.setTextColor(context.getResources().getColor(R.color.black));
                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(ChannelItem channel) {
            channelList.add(channel);
            notifyDataSetChanged();
        }
    
        /** 拖动变更频道排序 */
        public void exchange(int dragPostion, int dropPostion) {
            holdPosition = dropPostion;
            ChannelItem 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;
            notifyDataSetChanged();
        }
    
        /** 获取频道列表 */
        public List<ChannelItem> 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;
            notifyDataSetChanged();
        }
    
        /** 设置频道列表 */
        public void setListDate(List<ChannelItem> 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;
        }
        /** 显示放下的ITEM */
        public void setShowDropItem(boolean show) {
            isItemShow = show;
        }
    }

## OtherAdapter ##

public class OtherAdapter extends BaseAdapter { 
        private Context context;
        public List<ChannelItem> channelList;
        private TextView item_text;
        /** 是否可见 */
        boolean isVisible = true;
        /** 要删除的position */
        public int remove_position = -1;
    
        public OtherAdapter(Context context, List<ChannelItem> channelList) {
            this.context = context;
            this.channelList = channelList;
        }
    
        @Override
        public int getCount() {
            return channelList == null ? 0 : channelList.size();
        }
    
        @Override
        public ChannelItem 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.subscribe_category_item, null);
            item_text = (TextView) view.findViewById(R.id.text_item);
            ChannelItem channel = getItem(position);
            item_text.setText(channel.getName());
            if (!isVisible && (position == -1 + channelList.size())){
                item_text.setText("");
            }
            if(remove_position == position){
                item_text.setText("");
            }
            return view;
        }
    
        /** 获取频道列表 */
        public List<ChannelItem> getChannnelLst() {
            return channelList;
        }
    
        /** 添加频道列表 */
        public void addItem(ChannelItem 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<ChannelItem> 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;
        }
    }

## ChannelManage ##

public class ChannelManage { 
        public static ChannelManage channelManage;
        /** * 默认的用户选择频道列表 * */
        public static List<ChannelItem> defaultUserChannels;
        /** * 默认的其他频道列表 * */
        public static List<ChannelItem> defaultOtherChannels;
        private ChannelDao channelDao;
        /** 判断数据库中是否存在用户数据 */
        private boolean userExist = false;
        static {
            defaultUserChannels = new ArrayList<ChannelItem>();
            defaultOtherChannels = new ArrayList<ChannelItem>();
            defaultUserChannels.add(new ChannelItem(1, "推荐", 1, 1));
            defaultUserChannels.add(new ChannelItem(2, "热点", 2, 1));
            defaultUserChannels.add(new ChannelItem(3, "娱乐", 3, 1));
            defaultUserChannels.add(new ChannelItem(4, "时尚", 4, 1));
            defaultUserChannels.add(new ChannelItem(5, "科技", 5, 1));
            defaultUserChannels.add(new ChannelItem(6, "体育", 6, 1));
            defaultUserChannels.add(new ChannelItem(7, "军事", 7, 1));
            defaultOtherChannels.add(new ChannelItem(8, "财经", 1, 0));
            defaultOtherChannels.add(new ChannelItem(9, "汽车", 2, 0));
            defaultOtherChannels.add(new ChannelItem(10, "房产", 3, 0));
            defaultOtherChannels.add(new ChannelItem(11, "社会", 4, 0));
            defaultOtherChannels.add(new ChannelItem(12, "情感", 5, 0));
            defaultOtherChannels.add(new ChannelItem(13, "女人", 6, 0));
            defaultOtherChannels.add(new ChannelItem(14, "旅游", 7, 0));
            defaultOtherChannels.add(new ChannelItem(15, "健康", 8, 0));
            defaultOtherChannels.add(new ChannelItem(16, "美女", 9, 0));
            defaultOtherChannels.add(new ChannelItem(17, "游戏", 10, 0));
            defaultOtherChannels.add(new ChannelItem(18, "数码", 11, 0));
        }
    
        private ChannelManage(SQLHelper paramDBHelper) throws SQLException {
            if (channelDao == null)
                channelDao = new ChannelDao(paramDBHelper.getContext());
            // NavigateItemDao(paramDBHelper.getDao(NavigateItem.class));
            return;
        }
    
        /** * 初始化频道管理类 * @param paramDBHelper * @throws SQLException */
        public static ChannelManage getManage(SQLHelper dbHelper)throws SQLException {
            if (channelManage == null)
                channelManage = new ChannelManage(dbHelper);
            return channelManage;
        }
    
        /** * 清除所有的频道 */
        public void deleteAllChannel() {
            channelDao.clearFeedTable();
        }
        /** * 获取其他的频道 * @return 数据库存在用户配置 ? 数据库内的用户选择频道 : 默认用户选择频道 ; */
        public List<ChannelItem> getUserChannel() {
            Object cacheList = channelDao.listCache(SQLHelper.SELECTED + "= ?",new String[] { "1" });
            if (cacheList != null && !((List) cacheList).isEmpty()) {
                userExist = true;
                List<Map<String, String>> maplist = (List) cacheList;
                int count = maplist.size();
                List<ChannelItem> list = new ArrayList<ChannelItem>();
                for (int i = 0; i < count; i++) {
                    ChannelItem navigate = new ChannelItem();
                    navigate.setId(Integer.valueOf(maplist.get(i).get(SQLHelper.ID)));
                    navigate.setName(maplist.get(i).get(SQLHelper.NAME));
                    navigate.setOrderId(Integer.valueOf(maplist.get(i).get(SQLHelper.ORDERID)));
                    navigate.setSelected(Integer.valueOf(maplist.get(i).get(SQLHelper.SELECTED)));
                    list.add(navigate);
                }
                return list;
            }
            initDefaultChannel();
            return defaultUserChannels;
        }
    
        /** * 获取其他的频道 * @return 数据库存在用户配置 ? 数据库内的其它频道 : 默认其它频道 ; */
        public List<ChannelItem> getOtherChannel() {
            Object cacheList = channelDao.listCache(SQLHelper.SELECTED + "= ?" ,new String[] { "0" });
            List<ChannelItem> list = new ArrayList<ChannelItem>();
            if (cacheList != null && !((List) cacheList).isEmpty()){
                List<Map<String, String>> maplist = (List) cacheList;
                int count = maplist.size();
                for (int i = 0; i < count; i++) {
                    ChannelItem navigate= new ChannelItem();
                    navigate.setId(Integer.valueOf(maplist.get(i).get(SQLHelper.ID)));
                    navigate.setName(maplist.get(i).get(SQLHelper.NAME));
                    navigate.setOrderId(Integer.valueOf(maplist.get(i).get(SQLHelper.ORDERID)));
                    navigate.setSelected(Integer.valueOf(maplist.get(i).get(SQLHelper.SELECTED)));
                    list.add(navigate);
                }
                return list;
            }
            if(userExist){
                return list;
            }
            cacheList = defaultOtherChannels;
            return (List<ChannelItem>) cacheList;
        }
    
        /** * 保存用户频道到数据库 * @param userList */
        public void saveUserChannel(List<ChannelItem> userList) {
            for (int i = 0; i < userList.size(); i++) {
                ChannelItem channelItem = (ChannelItem) userList.get(i);
                channelItem.setOrderId(i);
                channelItem.setSelected(Integer.valueOf(1));
                channelDao.addCache(channelItem);
            }
        }
    
        /** * 保存其他频道到数据库 * @param otherList */
        public void saveOtherChannel(List<ChannelItem> otherList) {
            for (int i = 0; i < otherList.size(); i++) {
                ChannelItem channelItem = (ChannelItem) otherList.get(i);
                channelItem.setOrderId(i);
                channelItem.setSelected(Integer.valueOf(0));
                channelDao.addCache(channelItem);
            }
        }
    
        /** * 初始化数据库内的频道数据 */
        private void initDefaultChannel(){
            Log.d("deleteAll", "deleteAll");
            deleteAllChannel();
            saveUserChannel(defaultUserChannels);
            saveOtherChannel(defaultOtherChannels);
        }
    }

[http_blog.csdn.net_vipzjyno1_article_details_25005851]: http://blog.csdn.net/vipzjyno1/article/details/25005851
[1399250647_1821.gif]: https://img-my.csdn.net/uploads/201405/05/1399250647_1821.gif