Android Widget 만들기

https://developer.android.com/develop/ui/views/appwidgets/overview

App widgets overview  |  Android Developers

 

• Layout considerations

It's tempting to lay out your widgets according to the dimensions of the placement grid of a device that you develop with. This can be a useful initial approximation, but keep the following points in mind:

• Planning your widget resizing strategy across "size buckets" rather than variable grid dimensions gives you the most reliable results.
• The number, size, and spacing of cells can vary widely from device to device. Hence, it is very important that your widget is flexible and can accommodate more or less space than anticipated.
• As the user resizes a widget, the system responds with a dp size range in which your widget can redraw itself.
• Starting in Android 12, you can provide more refined size attributes and more flexible layouts. This includes:
  • Specifying widget size constraints. For example, you can specify the target size for your widget—in grid cells—as well as the maximum possible size.
  • Providing responsive layouts, which change depending on the size of the widget.
  • Providing exact-size layouts, which let the launcher respond with size options for portrait and landscape mode, for phones, or with four sizes for foldables.
  • Using updated guidance and new APIs to determine proper sizes for your widget.