需求功能說明：
該定制需求為在系統中添加一個新的分區如myimage。用以實作存放定制資源。比如在myimage下建立wallpaper目錄用于存放定制的牆紙圖檔資源，當Launcher載入預設牆紙或者選擇設定牆紙時會優先從該路徑下讀取資源。
第一部分：客制化預設桌面：
Launcher預設的桌面配置是放在framework下res以下配置的，圖檔也是放在framework以下，對于獨立的第三方Launcher要想繞開framework實作預設桌面則須要自身實作設定預設桌面的功能。是以要在Launcher第一次執行或者重置時設定預設桌面。實作方式為在Launcher.java類的onCreate（）方法下的showFirstRunWorkspaceCling（）執行設定預設桌面的功能代碼，例如以下：
/*封裝設定預設桌面的方法*/
private void setDefaultWallpaper(){
WallpaperManager wm = (WallpaperManager)getSystemService(Context.WALLPAPER_SERVICE);
try{
wm.setBitmap(getBitmap("/myimage/wallpaper/wallpaper_01.jpg"));
}catch(Exception e){
e.printStackTrace();
}
}
/*得到絕對路徑下的圖檔為bitmap類型*/
public Bitmap getBitmap(String path) {
Bitmap bitmap = null;
File file = new File(path);
if (file.exists())
bitmap = BitmapFactory.decodeFile(path);
return bitmap;
/*第一次啟動時顯示的指導畫面*/
public void showFirstRunWorkspaceCling() {
setDefaultWallpaper();
......
第二部分 客制化選擇桌面：
因為在Launcher2中對牆紙資源的引用是通過id引用，可是目前客制化定制的檔案路徑為絕對路徑如/myimage/wallpaper，也就說須要通過路徑進行引用，是以改動例如以下：
第一步：wallpapers.xml
如：
<item>wallpaper_01</item>
<item>wallpaper_02</item>
<item>wallpaper_04</item>
<item>wallpaper_05</item>
<item>wallpaper_06</item>
<item>wallpaper_07</item>
<item>wallpaper_08</item>
注：每一項的值應與實際圖檔名字同樣
第二步：改動WallpaperChooserDialogFragment.java類
private ArrayList<String> mThumbs;
private ArrayList<String> mImages;
private void selectWallpaper(int position) {
if (LauncherLog.DEBUG) {
LauncherLog.d(TAG, "selectWallpaper: position = " + position + ", this = " + this);
try {
WallpaperManager wpm = (WallpaperManager) getActivity().getSystemService(
Context.WALLPAPER_SERVICE);
wpm.setBitmap(getBitmap(mImages.get(position)));
Activity activity = getActivity();
activity.setResult(Activity.RESULT_OK);
activity.finish();
} catch (IOException e) {
Log.e(TAG, "Failed to set wallpaper: " + e);
}
public Bitmap getBitmap(String path) {
Bitmap bitmap = null;
File file = new File(path);
if (file.exists())
bitmap = BitmapFactory.decodeFile(path);
return bitmap;
private void findWallpapers() {
mThumbs = new ArrayList<String>();
mImages = new ArrayList<String>();
final Resources resources = getResources();
final String packageName = resources.getResourcePackageName(R.array.wallpapers);
addWallpapers(resources, packageName, R.array.wallpapers);
addWallpapers(resources, packageName, R.array.extra_wallpapers);
private void addWallpapers(Resources resources, String packageName, int list) {
final String[] extras = resources.getStringArray(list);
for (String extra : extras) {
String res="/myimage/wallpaper/"+extra+".jpg";
String thumbRes="/myimage/wallpaper/"+extra+"_small.jpg";
mThumbs.add(thumbRes);
mImages.add(res);
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if (convertView == null) {
view = mLayoutInflater.inflate(R.layout.wallpaper_item, parent, false);
} else {
view = convertView;
}
ImageView image = (ImageView) view.findViewById(R.id.wallpaper_image);
String thumbRes = mThumbs.get(position);
image.setImageBitmap(getBitmap(thumbRes));
Drawable thumbDrawable = image.getDrawable();
if (thumbDrawable != null) {
thumbDrawable.setDither(true);
Log.e(TAG, "Error decoding thumbnail resId=" + thumbRes + " for wallpaper #"
+ position);
return view;
@Override
protected Bitmap doInBackground(Integer... params) {
if (isCancelled() || !isAdded()) {
LauncherLog.d(TAG, "WallpaperLoader doInBackground: canceled = " + isCancelled()
+ ",isAdded() = " + isAdded() + ",activity = " + getActivity());
return null;
try {
return BitmapFactory.decodeFile(mImages.get(params[0]), mOptions);
} catch (OutOfMemoryError e) {
LauncherLog.e(TAG, "WallpaperLoader decode resource out of memory " + e.getMessage());
}
本文轉自mfrbuaa部落格園部落格，原文連結：http://www.cnblogs.com/mfrbuaa/p/5307978.html，如需轉載請自行聯系原作者