the screen width exceeds android:maxAspectRatio ).

android:resizeableActivity=false and when the declared aspect ratio of the application is not compatible with the container (e.g.

config_letterboxBackgroundWallpaperDarkScrimAlpha : how dark the wallpaper is.config_letterboxBackgroundWallpaperBlurRadius : the wallpaper blurring level.LETTERBOX_BACKGROUND_WALLPAPER : Show wallpaper, this option is similar to FLAG_SHOW_WALLPAPER and will cause the wallpaper window to be displayed.LETTERBOX_BACKGROUND_SOLID_COLOR : color is affected by config_letterboxBackgroundColor.LETTERBOX_BACKGROUND_APP_COLOR_BACKGROUND_FLOATING : color is affected by android:colorBackgroundFloating.LETTERBOX_BACKGROUND_APP_COLOR_BACKGROUND : Color is affected by android:colorBackground.config_letterboxBackgroundType : background fill type, respectively.config_letterboxActivit圜ornersRadius : the size of the rounded corners of the interface.

The appearance of the Letterbox can be influenced by the following factors. Letterbox mode displays the interface at a specified scale, and the surrounding blank area can be filled with wallpaper or colors. As more and more large and folding screen devices appear, many applications do not have UI adaptations for devices of different sizes, when the application chooses to display in a specific aspect ratio ( although Google does not recommend this, the official hope that developers can adapt the layout of different screen sizes ~), when the application’s aspect ratio and its container ratio is not compatible, it will be opened in Letterbox mode.

Letterspace for andriod