AppUtil.java

package coder.prettygirls.util;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;

/**
 * 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;
    }
}