android 中获取当前程序的版本号

1、

        try {
            int version = this.getPackageManager().getPackageInfo(this.getPackageName(), 0).versionCode;
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }

2、获取当前屏幕的宽高

    DisplayMetrics dm = getResources().getDisplayMetrics();
    int width = dm.widthPixels;
    int height = dm.heightPixels;