将launcher2主界面设置为待机墙纸,现在只做到了和待机静态墙纸一致,动态的目前暂没有实现。可以在Launcher.java里的private void setWorkspaceBackground(boolean workspace) 函数里,增加如下代码:
{
View layout = mAppsCustomizeTabHost.getContent();
// 获取壁纸管理器
WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
// 获取当前壁纸
Drawable wallpaperDrawable = wallpaperManager.getDrawable();
// 将Drawable,转成Bitmap
Bitmap bm = ((BitmapDrawable) wallpaperDrawable).getBitmap();
// 需要详细说明一下,<span style="font-family: Arial, Helvetica, sans-serif;">pageCount</span><span style="font-family: Arial, Helvetica, sans-serif;">、getCurrentWorkspaceScreen()、ScreenWidth、ScreenHeight分别 </span>
//对应于Launcher中的桌面屏幕总数、当前屏幕下标、屏幕宽度、屏幕高度.
float step = 0;
DisplayMetrics dm = new DisplayMetrics();
//获取屏幕信息
getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenWidth = dm.widthPixels;
int screenHeigh = dm.heightPixels;
int pageCount;
if (mWorkspace != null)
{
pageCount = mWorkspace.getPageCount();
}
else
{
pageCount = SCREEN_COUNT;
}
// 计算出屏幕的偏移量
step = (bm.getWidth() - screenWidth)/ (pageCount-1);
Log.d(TAG, "screenWidth="+screenWidth+";screenHeigh="+screenHeigh+";pageCount="+pageCount+";CurrentWorkspaceScreen="+getCurrentWorkspaceScreen());
// 截取相应屏幕的Bitmap
Bitmap pbm = Bitmap.createBitmap(bm, (int)(getCurrentWorkspaceScreen()*step), 0,screenWidth,screenHeigh);
// 设置 背景
layout.setBackgroundDrawable(new BitmapDrawable(pbm));
}