你可以从上下文中获得宽度和高度

java:

  int width= context.getResources().getDisplayMetrics().widthPixels;
  int height= context.getResources().getDisplayMetrics().heightPixels;

科特林

    val width: Int = context.resources.displayMetrics.widthPixels
    val height: Int = context.resources.displayMetrics.heightPixels

我建议您创建扩展函数。

/**
 * Return the width and height of the screen
 */
val Context.screenWidth: Int
  get() = resources.displayMetrics.widthPixels

val Context.screenHeight: Int
  get() = resources.displayMetrics.heightPixels

/**
 * Pixel and Dp Conversion
 */
val Float.toPx get() = this * Resources.getSystem().displayMetrics.density
val Float.toDp get() = this / Resources.getSystem().displayMetrics.density

val Int.toPx get() = (this * Resources.getSystem().displayMetrics.density).toInt()
val Int.toDp get() = (this / Resources.getSystem().displayMetrics.density).toInt()

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;
}

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(); 
}

似乎所有这些答案都不适合我的Galaxy M51和Android 11。在做了一些研究之后，我发现了这个代码:

WindowMetrics windowmetrics = MainActivity.getWindowManager().getCurrentWindowMetrics();
Rect rect = windowmetrics.getBounds();
int width = rect.right;
int height =rect.bottom;

显示我的真实设备分辨率为1080x2400，其余只返回810x1800。

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;