以编程方式设置 Android 设备的锁屏壁纸
Set lock screen wallpaper of Android device programmatically
有很多壁纸应用程序，您可以在其中更改与主壁纸分开的锁屏壁纸。如果我没记错 API 24 是可以做这种事情的，但是我发现与此相关的文章很少，而且它们太旧了。
WallpaperManager has a number of methods to help you get or set the specific wallpapers. As you want the lock screen wallpaper, use FLAG_LOCK。相关方法包括：
setBitmap(Bitmap fullImage, Rect visibleCropHint, boolean allowBackup, int which)
wallpaperManager.setBitmap(bitmap, null, true, WallpaperManager.FLAG_LOCK)
有很多壁纸应用程序，您可以在其中更改与主壁纸分开的锁屏壁纸。如果我没记错 API 24 是可以做这种事情的，但是我发现与此相关的文章很少，而且它们太旧了。
WallpaperManager has a number of methods to help you get or set the specific wallpapers. As you want the lock screen wallpaper, use FLAG_LOCK。相关方法包括：
setBitmap(Bitmap fullImage, Rect visibleCropHint, boolean allowBackup, int which)
wallpaperManager.setBitmap(bitmap, null, true, WallpaperManager.FLAG_LOCK)