Android中获取apk安装包信息的方法

一、获取安装包信息

/**
* 获取apk包的信息：版本号，名称，图标等
* @param abspath apk包的绝对路径
* @param context 
*/ 
public void apkinfo(string abspath,context context) { 

    packagemanager pm = context.getpackagemanager(); 
    packageinfo pkginfo = pm.getpackagearchiveinfo(abspath,packagemanager.get_activities); 
    if (pkginfo != null) { 
        applicationinfo appinfo = pkginfo.applicationinfo; 
        /* 必须加这两句，不然下面icon获取是default icon而不是应用包的icon */ 
        appinfo.sourcedir = abspath; 
        appinfo.publicsourcedir = abspath; 
        string appname = pm.getapplicationlabel(appinfo).tostring();// 得到应用名 
        string packagename = appinfo.packagename; // 得到包名 
        string version = pkginfo.versionname; // 得到版本信息 
        /* icon1和icon2其实是一样的 */ 
        drawable icon1 = pm.getapplicationicon(appinfo);// 得到图标信息 
        drawable icon2 = appinfo.loadicon(pm); 
        string pkginfostr = string.format("packagename:%s, vesion: %s, appname: %s", packagename, version, appname); 
        log.i(tag, string.format("pkginfo: %s", pkginfostr)); 
    } 
}

二、在apk安装的时候，我们可以获取安装包、版本、包名等信息。

public class testactivity extends activity {
 @override
 public void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.main);
  string archivefilepath="sdcard/jb51.net.apk";//安装包路径
  packagemanager pm = getpackagemanager();
   packageinfo info = pm.getpackagearchiveinfo(archivefilepath, packagemanager.get_activities);
    if(info != null){
     applicationinfo appinfo = info.applicationinfo;
     string appname = pm.getapplicationlabel(appinfo).tostring();
     string packagename = appinfo.packagename; //得到安装包名称
     string version=info.versionname; //得到版本信息
     // toast.maketext(testactivity.this, , toast.length_long).show();
     drawable icon = pm.getapplicationicon(appinfo);//得到图标信息
     textview tv = (textview)findviewbyid(r.id.tv);
     tv.settext("appname:"+appname+"---packagename:"+packagename);
     //显示图标
     imageview tu=(imageview)findviewbyid(r.id.imageview1);
     tu.setbackgrounddrawable(icon);
    }
   }

  }
 }

}