第一種

JAVA代碼

int screenWidth = getWindowManager().getDefaultDisplay().getWidth();
int screenHeight = getWindowManager().getDefaultDisplay().getHeight();

Kotlin代碼

val screenWidth = windowManager.defaultDisplay.width
val screenHeight = windowManager.defaultDisplay.height

已經補標記過時，不推薦使用。

第二種

Java代碼

DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenWidth = dm.widthPixels;
int screenHeight = dm.heightPixels;

Kotlin代碼

val dm = DisplayMetrics()
windowManager.defaultDisplay.getMetrics(dm)
val screenWidth = dm.widthPixels
val screenHeight = dm.heightPixels

第三種

Java代碼

Resources resources = this.getResources();
DisplayMetrics dm = resources.getDisplayMetrics();
int screenWidth = dm.widthPixels;
int screenHeight = dm.heightPixels;

Kotlin代碼

val resources: Resources = this.resources
val dm: DisplayMetrics = resources.displayMetrics
val screenWidth = dm.widthPixels
val screenHeight = dm.heightPixels

第四種

前面三種獲取的值單位是px，這一種得到的是dp值。

Java代碼

Configuration config = getResources().getConfiguration();
int screenWidth = config.screenWidthDp;
int screenHeight = config.screenHeightDp;

Kotlin代碼

val config: Configuration = resources.configuration
val screenWidth = config.screenWidthDp
val screenHeight = config.screenHeightDp

Compose中獲取

val config = LocalConfiguration.current
val screenWidth = config.screenWidthDp
val screenHeight = config.screenHeightDp