Android Launcher分析和修改13——实现Launcher编辑模式(1) 壁纸更换_android 自定义laucher

//Edited by mythou
//http://www.cnblogs.com/mythou/

public class WorkSpaceEdit extends LinearLayout
{
  //.......  
}

//Edited by mythou
//http://www.cnblogs.com/mythou/

　　<!-- WorkSpace下面编辑菜单  mythou-->
    <include 
        layout="@layout/workspace_edit"
        android:id="@+id/workspaceEditID"
        android:layout_width="match_parent"
        android:layout_height="160dp"
        android:layout_gravity="bottom" 
        android:visibility="gone"/>    

//Edited by mythou
//http://www.cnblogs.com/mythou/

<com.android.launcher2.WorkSpaceEdit
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher"
    android:background="@drawable/workspace_edit_bg"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    >

//.................

</com.android.launcher2.WorkSpaceEdit>

//Edited by mythou
//http://www.cnblogs.com/mythou/

public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState)
    {
　　　　 //查找wallpapers和extra_wallpapers里面的图片文件
        findWallpapers();

        /*
         * If this fragment is embedded in the layout of this activity, then we
         * should generate a view to display. Otherwise, a dialog will be
         * created in onCreateDialog()
         */
        if (mEmbedded)
        {
            View view = inflater.inflate(R.layout.wallpaper_chooser, container,
                    false);
            view.setBackgroundDrawable(mWallpaperDrawable);
　　　　　　　//通过Gallery控件显示壁纸
            final Gallery gallery = (Gallery) view.findViewById(R.id.gallery);
            gallery.setCallbackDuringFling(false);
            gallery.setOnItemSelectedListener(this);
            gallery.setAdapter(new ImageAdapter(getActivity()));

            View setButton = view.findViewById(R.id.set);
            setButton.setOnClickListener(new OnClickListener()
            {
                @Override
                public void onClick(View v)
                {
　　　　　　　　　　　//设置壁纸的操作
                    selectWallpaper(gallery.getSelectedItemPosition());
                }
            });
            return view;
        }
        return null;
    }

//Edited by mythou
//http://www.cnblogs.com/mythou/

　　private void addWallpapers(Resources resources, String packageName, int list)
    {
        final String[] extras = resources.getStringArray(list);
        for (String extra : extras)
        {
　　　　　　 //通过文件名查找图片资源的ID
            int res = resources.getIdentifier(extra, "drawable", packageName);
            if (res != 0)
            {
                final int thumbRes = resources.getIdentifier(extra + "_small",
                        "drawable", packageName);

                if (thumbRes != 0)
                {
　　　　　　　　　　　//分别把缩略图和大图片加入到图片列表，这里保存的是图片资源ID
                    mThumbs.add(thumbRes);
                    mImages.add(res);
                    // Log.d(TAG, "add: [" + packageName + "]: " + extra + " ("
                    // + res + ")");
                }
            }
        }
    }

//Edited by mythou
//http://www.cnblogs.com/mythou/

if (position==0)
{
     //选择其他壁纸
     final Intent pickWallpaper = new Intent(Intent.ACTION_SET_WALLPAPER);
     Intent chooser = Intent.createChooser(pickWallpaper, mContext.getText(R.string.chooser_wallpaper));
     ((Activity) mContext).startActivityForResult(chooser, REQUEST_PICK_WALLPAPER);
     return ;
}