由于自己桌面控件需要实现圆角+裁剪的图片显示，必须获取准确的AppWidget桌面控件宽高。查了百度一大堆资料都是不全的，然后上了下StackOverFlow终于找到答案并解决问题。
class WidgetSizeProvider(
private val context: Context // Do not pass Application context
) {
private val appWidgetManager = AppWidgetManager.getInstance(context)
fun getWidgetsSize(widgetId: Int): Pair<Int, Int> {
val isPortrait = context.resources.configuration.orientation == ORIENTATION_PORTRAIT
val width = getWidgetWidth(isPortrait, widgetId)
val height = getWidgetHeight(isPortrait, widgetId)
val widthInPx = context.dip(width)
val heightInPx = context.dip(height)
return widthInPx to heightInPx
}
private fun getWidgetWidth(isPortrait: Boolean, widgetId: Int): Int =
if (isPortrait) {
getWidgetSizeInDp(widgetId, AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH)
} else {
getWidgetSizeInDp(widgetId, AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH)
}
private fun getWidgetHeight(isPortrait: Boolean, widgetId: Int): Int =
if (isPortrait) {
getWidgetSizeInDp(widgetId, AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT)
} else {
getWidgetSizeInDp(widgetId, AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT)
}
private fun getWidgetSizeInDp(widgetId: Int, key: String): Int = appWidgetManager.getAppWidgetOptions(widgetId).getInt(key, 0)
private fun Context.dip(value: Int): Int = (value * resources.displayMetrics.density).toInt()
}
