感谢@Niklas +1，这是正确的方法。

public class MyActivity extends Activity implements android.support.v4.View.OnApplyWindowInsetsListener {

    Rect windowInsets;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.my_activity);

        View rootview = findViewById(android.R.id.content);

        android.support.v4.View.ViewCompat.setOnApplyWindowInsetsListener(rootview, this);
    }

    android.support.v4.View.WindowInsetsCompat android.support.v4.View.OnApplyWindowInsetsListener.OnApplyWindowInsets(View v, android.support.v4.View.WindowInsetsCompat insets)
    {
        windowInsets = new Rect();
        windowInsets.set(insets.getSystemWindowInsetLeft(), insets.getSystemWindowInsetTop(), insets.getSystemWindowInsetRight(), insets.getSystemWindowInsetBottom());
        //StatusBarHeight = insets.getSystemWindowInsetTop();

        //Refresh/Adjust view accordingly

        return insets;
    }
}

请原谅，如果代码不是100%正确，从Xamarin c#转换，但这是它的公正。工作与缺口等。

默认高度是25dp。在Android Marshmallow (API 23)中，高度降低到24dp。

更新:请注意，自从缺口和打孔的时代开始，使用静态高度的状态栏不再工作。请使用窗口插页代替!

240x320 - 20px 320x480 - 25px 480x800+ - 38px

上面的答案对某些人不起作用的原因是，在视图准备好渲染之前，您无法获得视图的维度。使用一个OnGlobalLayoutListener来获得所说的维度，当你实际上可以:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final ViewGroup decorView = (ViewGroup) this.getWindow().getDecorView();
    decorView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            if (Build.VERSION.SDK_INT >= 16) {
                decorView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            } else {
                // Nice one, Google
                decorView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
            }
            Rect rect = new Rect();
            decorView.getWindowVisibleDisplayFrame(rect);
            rect.top; // This is the height of the status bar
        }
    }
}

这是最可靠的方法。

在android6.0中，状态栏的高度为24dp

 <!-- Height of the status bar -->
 <dimen name="status_bar_height">24dp</dimen>
 <!-- Height of the bottom navigation / system bar. -->
 <dimen name="navigation_bar_height">48dp</dimen>

你可以在源代码中找到答案:frameworks\base\core\res\res\values\ dimensions .xml

我将一些解决方案合并在一起:

public static int getStatusBarHeight(final Context context) {
    final Resources resources = context.getResources();
    final int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
    if (resourceId > 0)
        return resources.getDimensionPixelSize(resourceId);
    else
        return (int) Math.ceil((VERSION.SDK_INT >= VERSION_CODES.M ? 24 : 25) * resources.getDisplayMetrics().density);
    }

另一个选择:

    final View view = findViewById(android.R.id.content);
    runJustBeforeBeingDrawn(view, new Runnable() {
        @Override
        public void run() {
            int statusBarHeight = getResources().getDisplayMetrics().heightPixels - view.getMeasuredHeight();
        }
    });

编辑:runJustBeforeBeingDrawn的替代方案:https://stackoverflow.com/a/28136027/878126