Choose images in SD card and set it as wallpaper.
- 'overall' mode for avoiding unexpected image zoom.
- 'avoid status bar','avoid navigation bar' for just-fit image size to home screen.
- 'fullcolor loading' and 'dither output' for image quality and decrease byte size of wallpaper.
If you want to stop scroll wallpaper, please find home screen app that has the option.
SET_WALLPAPER for set wallpaper
READ_EXTERNAL_STORAGE for read image
WRITE_EXTERNAL_STORAGE for delete image
! add permission: android.permission.WRITE_SETTINGS
seems WallpaperManager#clear() requires this permission in case of some devices.
! add permission: android.permission.WRITE_EXTERNAL_STORAGE
! add permission: android.permission.READ_EXTERNAL_STORAGE
+ "avoid navigation bar" for Android 4.0 (Ice cream sandwich)