我创建了一些自定义元素,并希望以编程方式将它们放置在右上角(距离上边缘n个像素,距离右边缘m个像素)。因此,我需要获得屏幕宽度和屏幕高度,然后设置位置:

int px = screenWidth - m;
int py = screenHeight - n;

如何在主活动中获取screenWidth和screenHeight?


当前回答

我会这样包装getSize代码:

@SuppressLint("NewApi")
public static Point getScreenSize(Activity a) {
    Point size = new Point();
    Display d = a.getWindowManager().getDefaultDisplay();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        d.getSize(size);
    } else {
        size.x = d.getWidth();
        size.y = d.getHeight();
    }
    return size;
}

其他回答

最简单的方法:

 int screenHeight = getResources().getDisplayMetrics().heightPixels;
 int screenWidth = getResources().getDisplayMetrics().widthPixels; 

这不是OP的答案,因为他希望以真实像素显示尺寸。我想要“设备无关像素”的尺寸,并从这里汇总答案https://stackoverflow.com/a/17880012/253938在这里https://stackoverflow.com/a/6656774/253938我想到了这个:

    DisplayMetrics displayMetrics = Resources.getSystem().getDisplayMetrics();
    int dpHeight = (int)(displayMetrics.heightPixels / displayMetrics.density + 0.5);
    int dpWidth = (int)(displayMetrics.widthPixels / displayMetrics.density + 0.5);

一种方法是:

Display display = getWindowManager().getDefaultDisplay(); 
int width = display.getWidth();
int height = display.getHeight();

它已被弃用,您应该尝试以下代码。前两行代码提供DisplayMetrics对象。此对象包含高度像素、宽度像素等字段。

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

Api级别30更新

final WindowMetrics metrics = windowManager.getCurrentWindowMetrics();
 // Gets all excluding insets
 final WindowInsets windowInsets = metrics.getWindowInsets();
 Insets insets = windowInsets.getInsetsIgnoringVisibility(WindowInsets.Type.navigationBars()
         | WindowInsets.Type.displayCutout());

 int insetsWidth = insets.right + insets.left;
 int insetsHeight = insets.top + insets.bottom;

 // Legacy size that Display#getSize reports
 final Rect bounds = metrics.getBounds();
 final Size legacySize = new Size(bounds.width() - insetsWidth,
         bounds.height() - insetsHeight);

我认为这是最简单的

private fun checkDisplayResolution() {
    val displayMetrics = DisplayMetrics().also {
        windowManager.defaultDisplay.getMetrics(it)
    }

    Log.i(TAG, "display width: ${displayMetrics.widthPixels}")
    Log.i(TAG, "display height: ${displayMetrics.heightPixels}")
    Log.i(TAG, "display width dpi: ${displayMetrics.xdpi}")
    Log.i(TAG, "display height dpi: ${displayMetrics.ydpi}")
    Log.i(TAG, "display density: ${displayMetrics.density}")
    Log.i(TAG, "display scaled density: ${displayMetrics.scaledDensity}")
}

遵循以下方法:

public static int getWidthScreen(Context context) {
    return getDisplayMetrics(context).widthPixels;
}

public static int getHeightScreen(Context context) {
    return getDisplayMetrics(context).heightPixels;
}

private static DisplayMetrics getDisplayMetrics(Context context) {
    DisplayMetrics displayMetrics = new DisplayMetrics();
    WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    wm.getDefaultDisplay().getMetrics(displayMetrics);
    return displayMetrics;
}