工具类：AppUtil

package com.hxsmart.intelligentizepos.util;

/**
 * Created by llbt on 2016/3/31.
 */
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;

import com.hxsmart.intelligentizepos.application.IntelligentizeApplication;

import java.io.File;

/**
 * APP工具类
 * APP相关信息工具类。获取版本信息
 */
public class AppUtil {

    /**
     * Don't let anyone instantiate this class.
     */
    private AppUtil() {
        throw new Error("Do not need instantiate!");
    }

    /**
     * 得到软件版本号
     *
     * @param context 上下文
     * @return 当前版本Code
     */
    public static int getVerCode(Context context) {
        int verCode = -1;
        try {
            String packageName = context.getPackageName();
            verCode = context.getPackageManager().getPackageInfo(packageName, 0).versionCode;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return verCode;
    }

    /**
     * 得到软件显示版本信息
     *
     * @param context 上下文
     * @return 当前版本信息
     */
    public static String getVerName(Context context) {
        String verName = "";
        try {
            String packageName = context.getPackageName();
            verName = context.getPackageManager().getPackageInfo(packageName, 0).versionName;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return verName;
    }

    /**
     * 安装apk
     *
     * @param context 上下文
     * @param file    APK文件
     */
    public static void installApk(Context context, File file) {
        Intent intent = new Intent();
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.setAction(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.fromFile(file),
                "application/vnd.android.package-archive");
        context.startActivity(intent);
    }

    /**
     * 安装apk
     *
     * @param context 上下文
     * @param file    APK文件uri
     */
    public static void installApk(Context context, Uri file) {
        Intent intent = new Intent();
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.setAction(Intent.ACTION_VIEW);
        intent.setDataAndType(file, "application/vnd.android.package-archive");
        context.startActivity(intent);
    }

    /**
     * 获取应用名称
     * @return  appName 应用名称
     */
    public static String getAppName(){
        PackageManager pm = IntelligentizeApplication.getInstance().getPackageManager();
        String appName = IntelligentizeApplication.getInstance().getApplicationInfo().loadLabel(pm).toString();
        return appName;
    }

    /**
     * 获取VersionName
     * @return  VersionName 应用版本号名称
     */
    public static String getVersionName(){
        try {
            Context context = IntelligentizeApplication.getInstance();
            String packageName = context.getPackageName();
            return context.getPackageManager().getPackageInfo(packageName, 0).versionName;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

}