获取状态栏和导航栏的高度

public class UiTool {
     
    private static int STATUS_BAR_HEIGHT = -1;

    /**
     * 得到我们的状态栏的高度
     *
     * @param activity Activity
     * @return 状态栏的高度
     */
    public static int getStatusBarHeight(Activity activity) {
     
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && STATUS_BAR_HEIGHT == -1) {
     
            try {
     
                final Resources res = activity.getResources();
                // 尝试获取status_bar_height这个属性的Id对应的资源int值
                int resourceId = res.getIdentifier("status_bar_height", "dimen", "android");
                if (resourceId <= 0) {
     
                    Class<?> clazz = Class.forName("com.android.internal.R$dimen");
                    Object object = clazz.newInstance();
                    resourceId = Integer.parseInt(clazz.getField("status_bar_height")
                            .get(object).toString());
                }


                // 如果拿到了就直接调用获取值
                if (resourceId > 0)
                    STATUS_BAR_HEIGHT = res.getDimensionPixelSize(resourceId);

                // 如果还是未拿到
                if (STATUS_BAR_HEIGHT <= 0) {
     
                    // 通过Window拿取
                    Rect rectangle = new Rect();
                    Window window = activity.getWindow();
                    window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
                    STATUS_BAR_HEIGHT = rectangle.top;
                }

            } catch (Exception e) {
     
                e.printStackTrace();
            }
        }
        return STATUS_BAR_HEIGHT;
    }

    /**
     * 获取底部导航栏高度
     *
     * @param context Context
     * @return 0，未获取到
     */
    public static int getNavigationBarHeight(Context context) {
     
        Resources resources = context.getResources();
        int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
        if (resourceId == 0) {
     
            return 0;
        }
        return resources.getDimensionPixelSize(resourceId);

    }

    public static int getScreenWidth(Activity activity) {
     
        DisplayMetrics displayMetrics = activity.getResources().getDisplayMetrics();
        //int width = activity.getWindowManager().getDefaultDisplay().getWidth();
        return displayMetrics.widthPixels;
    }

    public static int getScreenHeight(Activity activity) {
     
        DisplayMetrics displayMetrics = activity.getResources().getDisplayMetrics();
        //int width = activity.getWindowManager().getDefaultDisplay().getWidth();
        return displayMetrics.heightPixels;
    }
}