抽取手机app的信息

package com.example.srct.service;

import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ArrayList<AppInfo> appList = new ArrayList<AppInfo>(); //用来存储获取的应用信息数据
        AppInfo appInfo=new AppInfo();
        List<PackageInfo> packages = getPackageManager().getInstalledPackages(0);

        for(int i=0;i<packages.size();i++) {
            PackageInfo packageInfo = packages.get(i);
            AppInfo tmpInfo =new AppInfo();
            tmpInfo.appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
            tmpInfo.packageName = packageInfo.packageName;
            tmpInfo.versionName = packageInfo.versionName;
            tmpInfo.versionCode = packageInfo.versionCode;
            if((packageInfo.applicationInfo.flags& ApplicationInfo.FLAG_SYSTEM)==0)
            {
                appList.add(tmpInfo);//非系统应用
                tmpInfo.print();
            }
        }

        Log.v("app","-----------------------------------------------");
        for(int i=0;i<packages.size();i++) {
            PackageInfo packageInfo = packages.get(i);
            AppInfo tmpInfo =new AppInfo();
            tmpInfo.appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
            tmpInfo.packageName = packageInfo.packageName;
            tmpInfo.versionName = packageInfo.versionName;
            tmpInfo.versionCode = packageInfo.versionCode;
            if((packageInfo.applicationInfo.flags& ApplicationInfo.FLAG_SYSTEM)!=0)
            {
                appList.add(tmpInfo);//系统应用
                tmpInfo.printSystem();
            }
        }
    }
}
/////////////////////////////////////////////////////////////////////////////////

package com.example.srct.service;

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

/**
 * Created by srct on 2018/1/4.
 */

public class AppInfo {

        public String appName="";
        public String packageName="";
        public String versionName="";
        public int versionCode=0;
        public  void print()
        {
            Log.v("app","Name:"+appName+" Package:"+packageName);
            Log.v("app","Name:"+appName+" versionName:"+versionName);
            Log.v("app","Name:"+appName+" versionCode:"+versionCode);
        }
    public  void printSystem()
    {
        Log.v("app","Name:"+appName+" Package:"+packageName);
        Log.v("app","Name:"+appName+" versionName:"+versionName);
        Log.v("app","Name:"+appName+" versionCode:"+versionCode);
    }

}