只是通过parag和SpK更新答案，使其与当前SDK的向后兼容性保持一致:

int Measuredwidth = 0;  
int Measuredheight = 0;  
Point size = new Point();
WindowManager w = getWindowManager();

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)    {
    w.getDefaultDisplay().getSize(size);
    Measuredwidth = size.x;
    Measuredheight = size.y; 
}else{
    Display d = w.getDefaultDisplay(); 
    Measuredwidth = d.getWidth(); 
    Measuredheight = d.getHeight(); 
}

fun Activity.getRealScreenSize(): Pair<Int, Int> { //<width, height>
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
    val size = Point()
    display?.getRealSize(size)
    Pair(size.x, size.y)
} else {
    val size = Point()
    windowManager.defaultDisplay.getRealSize(size)
    Pair(size.x, size.y)

}}

这是一个扩展函数，你可以这样在你的活动中使用:

 override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    val pair = getRealScreenSize()
    pair.first //to get width
    pair.second //to get height
}

获取屏幕宽度和高度的值。

Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y;

为什么不

DisplayMetrics displaymetrics = getResources().getDisplayMetrics();

然后使用

displayMetrics.widthPixels

and

displayMetrics.heightPixels

DisplayMetrics lDisplayMetrics = getResources().getDisplayMetrics();
int widthPixels = lDisplayMetrics.widthPixels;
int heightPixels = lDisplayMetrics.heightPixels;

正如android官方文档所说，默认显示使用Context#getDisplay()，因为该方法在API级别30中已弃用。

.getDefaultDisplay getWindowManager () () .getMetrics (displayMetrics);

这一碗代码有助于确定宽度和高度。

public static int getWidth(Context context) {
    DisplayMetrics displayMetrics = new DisplayMetrics();
    Display display = context.getDisplay();
    if (display != null) {
        display.getRealMetrics(displayMetrics);
        return displayMetrics.widthPixels;
    }
    return -1;
}

关于高度:

public static int getHeight(Context context) {
    DisplayMetrics displayMetrics = new DisplayMetrics();
    Display display = context.getDisplay();
    if (display != null) {
        display.getRealMetrics(displayMetrics);
        return displayMetrics.heightPixels;
    }
    return -1;
}