Android 获取状态栏高度、底部导航栏高度、ActionBar高度的方法

下面是一个工具类参考

public class ScreenUtils {
    /**
     * 获取ActionBar高度
     */
    public static int getActionBarHeight(Context context) {
        TypedValue tv = new TypedValue();
        if (context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
            return TypedValue.complexToDimensionPixelSize(
                    tv.data, context.getResources().getDisplayMetrics()
            );
        }
        return 0;
    }

    /**
     * 获取状态栏高度
     */
    public static int getStatusBarHeight() {
        Resources resources = Resources.getSystem();
        int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
        return resources.getDimensionPixelSize(resourceId);
    }

    /**
     * 获取底部导航栏高度
     */
    public static int getNavBarHeight() {
        Resources res = Resources.getSystem();
        int resourceId = res.getIdentifier("navigation_bar_height", "dimen", "android");
        if (resourceId != 0) {
            return res.getDimensionPixelSize(resourceId);
        } else {
            return 0;
        }
    }

    /**
     * 判断底部状态栏是否显示
     */
    public static boolean isNavBarVisible(@NonNull final Activity activity) {
        return isNavBarVisible(activity.getWindow());
    }

    /**
     * 判断底部状态栏是否显示
     */
    public static boolean isNavBarVisible(@NonNull final Window window) {
        boolean isVisible = false;
        ViewGroup decorView = (ViewGroup) window.getDecorView();
        for (int i = 0, count = decorView.getChildCount(); i < count; i++) {
            final View child = decorView.getChildAt(i);
            final int id = child.getId();
            if (id != View.NO_ID) {
                String resourceEntryName = getResNameById(id,window);
                if ("navigationBarBackground".equals(resourceEntryName)
                        && child.getVisibility() == View.VISIBLE) {
                    isVisible = true;
                    break;
                }
            }
        }
        if (isVisible) {
            int visibility = decorView.getSystemUiVisibility();
            isVisible = (visibility & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
        }

        return isVisible;
    }

    private static String getResNameById(int id, Window window) {
        try {
            return window.getContext().getResources().getResourceEntryName(id);
        } catch (Exception ignore) {
            return "";
        }
    }

    /**
     * 获取屏幕宽度
     */
    public static int getScreenWidth(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        if (wm == null) return -1;
        Point point = new Point();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            //Andoird 4.0时，引入了虚拟导航键
            wm.getDefaultDisplay().getRealSize(point);
        } else {
            wm.getDefaultDisplay().getSize(point);
        }
        return point.x;
    }

    /**
     * 获取屏幕高度
     */
    public static int getScreenHeight(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        if (wm == null) return -1;
        Point point = new Point();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            wm.getDefaultDisplay().getRealSize(point);
        } else {
            wm.getDefaultDisplay().getSize(point);
        }
        return point.y;
    }

    /**
     * 获取宽度（排除系统装饰元素，如底部导航栏等），此方法是不准确的
     */
    public static int getAppScreenWidth(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        if (wm == null) return -1;
        Point point = new Point();
        wm.getDefaultDisplay().getSize(point);
        return point.x;
    }

    /**
     * 获取高度（排除系统装饰元素，如底部导航栏等），此方法是不准确的
     */
    public static int getAppScreenHeight(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        if (wm == null) return -1;
        Point point = new Point();
        wm.getDefaultDisplay().getSize(point);
        return point.y;
    }

    /**
     * 获取ContentView宽度
     */
    public static int getContentViewWidth(Activity activity) {
        View contentView = activity.findViewById(Window.ID_ANDROID_CONTENT);
        return contentView.getWidth();
    }

    /**
     * 获取ContentView高度
     */
    public static int getContentViewHeight(Activity activity) {
        View contentView = activity.findViewById(Window.ID_ANDROID_CONTENT);
        return contentView.getHeight();
    }
}