Android工具类之App相关辅助类

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/** * app相关辅助类 */public class AppUtil {    private AppUtil() {         /* cannot be instantiated*/        throw new UnsupportedOperationException("cannot be instantiated");    }    /**     * 获取应用程序名称     *     * @param context     * @return     */    public static String getAppName(Context context) {        PackageManager packageManager = context.getPackageManager();        try {            PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);            int labelRes = packageInfo.applicationInfo.labelRes;            return context.getResources().getString(labelRes);        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();        }        return null;    }    /**     * 获取应用程序版本名称信息     *     * @param context     * @return 当前应用的版本名称     */    public static String getVersionName(Context context) {        try {            PackageManager packageManager = context.getPackageManager();            PackageInfo packageInfo = packageManager.getPackageInfo(                    context.getPackageName(), 0);            return packageInfo.versionName;        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();        }        return null;    }    /**     * 获取应用程序的版本Code信息     *     * @param context     * @return 版本code     */    public static int getVersionCode(Context context) {        try {            PackageManager packageManager = context.getPackageManager();            PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);            return packageInfo.versionCode;        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();        }        return 0;    }}
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