android设置wallpaper

设置壁纸的代码在
Launcher.java中的case AddAdapter.ITEM_WALLPAPER: {
                    startWallpaper();
                    break;
                }
中，

private void startWallpaper() {
        closeAllApps(true);
        final Intent pickWallpaper = new Intent(Intent.ACTION_SET_WALLPAPER);
        Intent chooser = Intent.createChooser(pickWallpaper,
                getText(R.string.chooser_wallpaper));
        // NOTE: Adds a configure option to the chooser if the wallpaper supports it
        //       Removed in Eclair MR1
//        WallpaperManager wm = (WallpaperManager)
//                getSystemService(Context.WALLPAPER_SERVICE);
//        WallpaperInfo wi = wm.getWallpaperInfo();
//        if (wi != null && wi.getSettingsActivity() != null) {
//            LabeledIntent li = new LabeledIntent(getPackageName(),
//                    R.string.configure_wallpaper, 0);
//            li.setClassName(wi.getPackageName(), wi.getSettingsActivity());
//            chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Intent[] { li });
//        }
        startActivityForResult(chooser, REQUEST_PICK_WALLPAPER);
    }

这个action是WallpaperChooser.java来响应的。

<activity
            android:name="com.android.launcher2.WallpaperChooser"
            android:label="@string/pick_wallpaper"
            android:icon="@drawable/ic_launcher_wallpaper"
            android:screenOrientation="nosensor"
            android:finishOnCloseSystemDialogs="true">
            <intent-filter>
                <action android:name="android.intent.action.SET_WALLPAPER" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity> 

在WallpaperChooser中通过

addWallpapers(resources, packageName, R.array.wallpapers);
        addWallpapers(resources, packageName, R.array.extra_wallpapers);

来设置，找到wallpapers.xml就行了。