Android: Display Manager

public class AppDisplayManager {
    private static AppDisplayManager ourInstance = new AppDisplayManager();
    private Display mDisplay;

    public static AppDisplayManager getInstance() {
        return ourInstance;
    }

    private AppDisplayManager() {
        WindowManager wm =
         (WindowManager) CommonUtil.getAppContext().getSystemService(Context.WINDOW_SERVICE);
        mDisplay = wm.getDefaultDisplay();
    }

    public int getDeviceWidth() {
        if (null != mDisplay) {
            if (android.os.Build.VERSION.SDK_INT >= 

                                  android.os.Build.VERSION_CODES.HONEYCOMB_MR2) {
                Point point = new Point();
                mDisplay.getSize(point);
                return point.x;
            } else {
                return mDisplay.getWidth();
            }
        } else {
            return 0;
        }
    }

    public int getDeviceHeight() {
        if (null != mDisplay) {
            if (android.os.Build.VERSION.SDK_INT >= 

                             android.os.Build.VERSION_CODES.HONEYCOMB_MR2) {
                Point point = new Point();
                mDisplay.getSize(point);
                return point.y;
            } else {
                return mDisplay.getHeight();
            }
        } else {
            return 0;
        }
    }
}