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(); 
}

DisplayMetrics dimension = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dimension);
        int width = dimension.widthPixels;
        int height = dimension.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);

下面给出的代码是kotlin，是根据Android的最新版本编写的，帮助您确定宽度和高度:

fun getWidth(context: Context): Int {
    var width:Int = 0
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
        val displayMetrics = DisplayMetrics()
        val display: Display? = context.getDisplay()
        display!!.getRealMetrics(displayMetrics)
        return displayMetrics.widthPixels
    }else{
        val displayMetrics = DisplayMetrics()
        this.windowManager.defaultDisplay.getMetrics(displayMetrics)
        width = displayMetrics.widthPixels
        return width
    }
}

fun getHeight(context: Context): Int {
    var height: Int = 0
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
        val displayMetrics = DisplayMetrics()
        val display = context.display
        display!!.getRealMetrics(displayMetrics)
        return displayMetrics.heightPixels
    }else {
        val displayMetrics = DisplayMetrics()
        this.windowManager.defaultDisplay.getMetrics(displayMetrics)
        height = displayMetrics.heightPixels
        return height
    }
}

val displayMetrics = DisplayMetrics()
windowManager.defaultDisplay.getMetrics(displayMetrics)

var width = displayMetrics.widthPixels
var height = displayMetrics.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;
}

有一个非常简单的答案，没有通过上下文

public static int getScreenWidth() {
    return Resources.getSystem().getDisplayMetrics().widthPixels;
}

public static int getScreenHeight() {
    return Resources.getSystem().getDisplayMetrics().heightPixels;
}

注:如果你想要高度包括导航条，使用下面的方法

WindowManager windowManager =
        (WindowManager) BaseApplication.getApplication().getSystemService(Context.WINDOW_SERVICE);
    final Display display = windowManager.getDefaultDisplay();
    Point outPoint = new Point();
    if (Build.VERSION.SDK_INT >= 19) {
        // include navigation bar
        display.getRealSize(outPoint);
    } else {
        // exclude navigation bar
        display.getSize(outPoint);
    }
    if (outPoint.y > outPoint.x) {
        mRealSizeHeight = outPoint.y;
        mRealSizeWidth = outPoint.x;
    } else {
        mRealSizeHeight = outPoint.x;
        mRealSizeWidth = outPoint.y;
    }