新闻阅读器频道管理
来源：互联网 发布：大数据 侦查 反贪 编辑：程序博客网 时间：2024/05/15 07:09
原文链接：http://blog.csdn.net/vipzjyno1/article/details/25005851
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); }} 0 0
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