android获取本机其他app的版本信息的示例代码

package com.zznode.bean;

import android.graphics.drawable.Drawable;
import android.util.Log;

/**
 * Created by 杰梵 on 2017/9/25.
 * 用来存取app的信息。
 */

public class AppInfo {
  public String appName = "";
  public String packageName = "";
  public String versiOnName= "";
  public int versiOnCode= 0;
  public Drawable appIcon = null;

  public void print(){
    Log.v("app","Name:"+appName+" Package:"+packageName);
    Log.v("app","Name:"+appName+" versionName:"+versionName);
    Log.v("app","Name:"+appName+" versionCode:"+versionCode);
  }

}

/**
   *
   * @param sign 1、本机全部app的信息 2、系统应用的信息 3、非系统应用的信息
   * @return app的信息
   */
  public List getAppInfo(int sign) {
    List appList = new ArrayList(); //用来存储获取的应用信息数据　　　　　
    List packages = getPackageManager().getInstalledPackages(0);
    for (int i = 0; i