替launcher添加一个仿Mac的dock(附源码)

为launcher添加一个仿Mac的dock(附源码)
之前在网上看到有篇文章：Launcher之Dock细节篇http://news.wangmeng.cn/detailNews/2716-the-article-details-launcher-dock 它实现了一个仿Mac的dock。感觉蛮有意思的，所以就照着仿制了一个。

可以动态的添加快捷方式，默认包含AllApp按钮，图标居中显示。
文章后边附带的源码是基于android2.2自带的launcher2稍作修改而成，使用eclipse调试。

一、首先要在Launcher的setupViews函数里面初始化自己的layout(需增加3个地方)

[java] view plaincopy

    1.

    dockbar=(DockBar)dragLayer.findViewById(R.id.dockbar);

    dockbar.setLauncher(this);

    dockbar.setDragController(dragController);

    2.

    dragController.setDragScoller(workspace);

    dragController.setDragListener(deleteZone);

    dragController.setDockDragListener(dockbar); // hmg25 add for dock



    setDockDragListener为自定义函数，添加在DragController的startDrag中，具体见源码

    if(mDockListener!=null){

          mDockListener.onDragStart(source, dragInfo, dragAction);

            }





    3.

    // The order here is bottom to top.

    dragController.addDropTarget(workspace);

    dragController.addDropTarget(dockbar);    //hmg25 add for dock

    dragController.addDropTarget(deleteZone);



二、在layout-port的launcher.xml中增加

[xhtml] view plaincopy

    

     <com.android.launcher2.DockBar

            android:id="@+id/dockbar"

            android:layout_width="fill_parent"

            android:layout_height="@dimen/button_bar_height"

            android:layout_gravity="bottom|center_horizontal"

            android:background="@drawable/dock_bg"

            launcher:direction="horizontal">

            <HorizontalScrollView android:id="@+id/dock_scroll_view"

            android:scrollbars="none"

            android:fadingEdge="none"

            android:saveEnabled="false"

            android:layout_width="fill_parent"

            android:layout_height="fill_parent">

            <LinearLayout android:orientation="horizontal"

            android:id="@+id/dock_item_holder"

            android:saveEnabled="false"

            android:layout_width="fill_parent"

            android:layout_height="fill_parent">

             <com.android.launcher2.HandleView   //默认将allapp按钮添加进去

                android:id="@+id/all_apps_button"

                android:layout_centerHorizontal="true"

                android:src="@drawable/all_apps_button"

                launcher:direction="horizontal"

                android:layout_width="fill_parent"

                android:layout_height="fill_parent"

                android:focusable="true"

                android:clickable="true"

                />

            </LinearLayout>

        </HorizontalScrollView>

    </com.android.launcher2.DockBar>

     

三、创建自定义的类：

[java] view plaincopy

    public class DockBar extends LinearLayout implements DropTarget, DragSource,

    DragController.DragListener,View.OnLongClickListener {



    @Override

        public boolean acceptDrop(DragSource source, int x, int y, int xOffset,int yOffset,DragView dragView, Object dragInfo) {

         //接受什么类型的图标

          Log.i("hmg", "DockBar->acceptDrop");

         final ItemInfo item = (ItemInfo) dragInfo;

         if (item.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET

         || item.itemType == LauncherSettings.Favorites.ITEM_TYPE_LIVE_FOLDER

         || item.itemType == LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER

         || item.itemType == LauncherSettings.Favorites.ITEM_TYPE_WIDGET_PHOTO_FRAME

         || item.itemType == LauncherSettings.Favorites.ITEM_TYPE_WIDGET_SEARCH

         || item.itemType == LauncherSettings.Favorites.ITEM_TYPE_WIDGET_CLOCK) {

         return false;

         }

         return true;

         }







    //拖拽释放时响应下边函数

    @Override

        public void onDrop(DragSource source, int x, int y, int xOffset,

             int yOffset, DragView dragView, Object dragInfo) {



         int position=0;

         position=getLocation(x); //根据释放时的坐标，获取插入位置

         addItemAt((ItemInfo)dragInfo, position);

        }

    /*

         * 传入x坐标，判断新图标的位置，此处仅判断竖屏

         */

        public int getLocation(int x){

                for(int i=0;i<mItemHolder.getChildCount();i++){

                    View iv = mItemHolder.getChildAt(i);

                    int[] position = new int[2];

                    //获取坐标，如果要适应横屏可以稍作修改，比较Y值

                    iv.getLocationOnScreen(position);

                    //判断释放时新增的图标在原图标的之前还是之后

                     if(x<=(position[0]+(iv.getWidth()/2))){

                             return i;

                     }

                 }

                 return mItemHolder.getChildCount();

             }





    private void addItemAt(ItemInfo itemInfo, int position)

        {

         View view=null;

         switch (itemInfo.itemType) {

         case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION:

         case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:

             ShortcutInfo shortcutInfo;

         // 拖拽图标来自于app list

         if(itemInfo.container ==NO_ID&& itemInfo instanceof ApplicationInfo)

         {

             //与来自桌面的图标包含信息不一样，具体看源码

             shortcutInfo= new ShortcutInfo((ApplicationInfo)itemInfo);

         }

         else

         shortcutInfo = (ShortcutInfo)itemInfo; //拖拽图标来自桌面

         //调用Launcher中的CreateDockShortcut生成一个imageView

         view = mLauncher. CreateDockShortcut (shortcutInfo);

          view.setOnLongClickListener(this);

           break;

         case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER:

             break;

         default:

             throw new IllegalStateException("Unknown item type: "

                 + itemInfo.itemType);

         }

         mItemHolder.addView(view, position);

    }



    之所以将新建view用Launcher. CreateDockShortcut是想直接使用Launcher中的单击事件。

    View CreateDockShortcut (ShortcutInfo shortcutInfo)

        {

         Context context=getApplicationContext();

         ImageView imageView =new ImageView(context);

         imageView.setImageBitmap(shortcutInfo.mIcon);

         imageView.setOnClickListener(this);

         imageView.setFocusable(true);

         imageView.setTag(shortcutInfo);

         imageView.setMinimumWidth(100);

         return imageView;

        }



     在dock上长按，拖拽交换位置或者拖拽出去

    @Override

        public boolean onLongClick(View v) {

         // TODO Auto-generated method stub

          if (mLauncher.isAllAppsVisible())

             mLauncher.closeAllApps(false);

             mSelectedView = v;

    //开始拖拽

         mDragController.startDrag(v, this, v.getTag(),

             DragController.DRAG_ACTION_MOVE);

          removeSelectedItem();

             return true;

        }

    private void removeSelectedItem()

        {

          if (mSelectedView == null)

            return;

          mItemHolder.removeView(mSelectedView);

        }

代码修改了不少地方，具体看代码，修改的地方我都标注啦 ~~欢迎大家指教，相互交流~~

源码地址：http://download.csdn.net/source/3142047

替launcher添加一个仿Mac的dock(附源码)

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