AndroidN默认锁屏壁纸的实现

从Android N开始&＃xff0c;原生系统增加了锁屏壁纸开关&＃xff1a;

frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

/** If true, the lockscreen will show a distinct wallpaper */private static final boolean ENABLE_LOCKSCREEN_WALLPAPER &＃61; true;

要设置出厂默认锁屏壁纸&＃xff0c;修改如下代码即可实现&＃xff1a;
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/LockscreenWallpaper.java

public Bitmap getBitmap() {if (mCached) {return mCache;}if (!mWallpaperManager.isWallpaperSupported()) {mCached &＃61; true;mCache &＃61; null;return null;}LoaderResult result &＃61; loadBitmap(mCurrentUserId, mSelectedUser);if (result.success) {mCached &＃61; true;mUpdateMonitor.setHasLockscreenWallpaper(result.bitmap !&＃61; null);mCache &＃61; result.bitmap;}//add begin : 第一次开机加载失败&＃xff0c;尝试读取系统资源default_lock_wallpaper.jpg&＃xff0c;然后写入到锁屏壁纸文件中&＃xff0c;并重新loadBitmapif (mCache &＃61;&＃61; null) {try {mWallpaperManager.setStream(mContext.getResources().openRawResource(com.android.internal.R.drawable.default_lock_wallpaper),null,true,WallpaperManager.FLAG_LOCK);result &＃61; loadBitmap(mCurrentUserId, mSelectedUser);if (result.success) {mCached &＃61; true;mUpdateMonitor.setHasLockscreenWallpaper(result.bitmap !&＃61; null);mCache &＃61; result.bitmap;}} catch (IOException e) {Log.e(TAG, "can not set default lockscreen wallpaper");}}//add endreturn mCache;}

然后放入系统资源图片default_lock_wallpaper即可。