RK 7.1，增加默认锁屏壁纸：

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

private static final boolean ENABLE_LOCKSCREEN_WALLPAPER = true;

要设置出厂默认锁屏壁纸，修改如下代码即可实现：

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

public Bitmap getBitmap() {

if (mCached) {

return mCache;

}

if (!mWallpaperManager.isWallpaperSupported()) {

mCached = true;

mCache = null;

return null;

}

LoaderResult result = loadBitmap(mCurrentUserId, mSelectedUser);

if (result.success) {

mCached = true;

mUpdateMonitor.setHasLockscreenWallpaper(result.bitmap != null);

mCache = result.bitmap;

}

//add begin : 第一次开机加载失败，尝试读取系统资源default_lock_wallpaper.jpg，然后写入到锁屏壁纸文件中，并重新loadBitmap

if (mCache == null) {

try {

mWallpaperManager.setStream(

mContext.getResources().openRawResource(com.android.internal.R.drawable.default_lock_wallpaper),

null,

true,

WallpaperManager.FLAG_LOCK);

result = loadBitmap(mCurrentUserId, mSelectedUser);

if (result.success) {

mCached = true;

mUpdateMonitor.setHasLockscreenWallpaper(result.bitmap != null);

mCache = result.bitmap;

}

} catch (IOException e) {

Log.e(TAG, "can not set default lockscreen wallpaper");

}

}

//add end

return mCache;

}

frameworks/base/core/res/res/values/config.xml

- @null

+

然后放入系统资源图片default_lock_wallpaper即可。

壁纸显示不全是因为dwidth 和dheight 的值不对，要改成屏幕尺寸分辨率大小的

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

protected void onBoundsChange(Rect bounds) {

int vwidth = getBounds().width();

int vheight = getBounds().height();

- int dwidth = mState.mBackground.getWidth();

- int dheight = mState.mBackground.getHeight();

+ int dwidth = getBounds().width();

+ int dheight = getBounds().height();