android获取已安装应用信息（列表图标包名列表）

参考博客：http://www.cnblogs.com/mainroadlee/archive/2011/05/23/android_get_installed_app.html

原文中的代码链接打不开，文中也没有说如何构建adapter，经过摸索，该小应用的MainActivity如下：

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.graphics.drawable.Drawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

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

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);
}
}
public class MainActivity extends AppCompatActivity{

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try{
List<AppInfo> appList=new ArrayList<>();
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;
tmpInfo.appIcon=packageInfo.applicationInfo.loadIcon(getPackageManager());

//获取非系统应用
if((packageInfo.applicationInfo.flags& ApplicationInfo.FLAG_SYSTEM)==0){
appList.add(tmpInfo);
}
//appList.add(tmpInfo);
}
ListView listView=(ListView)findViewById(R.id.list);
MyAdapter arrayAdapter=new MyAdapter(this,R.layout.list_item,appList);
listView.setAdapter(arrayAdapter);
}catch(Exception e){
e.printStackTrace();
}
}
}

class MyAdapter extends ArrayAdapter<AppInfo>{
private Context mContext;
private int resource;
public MyAdapter(Context context,int resource,List<AppInfo> data){
super(context,resource,data);
this.mContext=context;
this.resource=resource;
}

@Override
public View getView(int position,View convertView,ViewGroup parent){
ViewHolder holder=null;
if(convertView==null){
holder=new ViewHolder();
convertView= LayoutInflater.from(mContext).inflate(resource,null);
holder.image=(ImageView)convertView.findViewById(R.id.ItemImage);
holder.title=(TextView)convertView.findViewById(R.id.ItemTitle);
holder.text=(TextView)convertView.findViewById(R.id.ItemText);
convertView.setTag(holder);
}else{
holder=(ViewHolder)convertView.getTag();
}

holder.image.setImageDrawable(getItem(position).appIcon);
holder.title.setText(getItem(position).appName);
holder.text.setText(getItem(position).packageName);

return convertView;
}
final class ViewHolder{
ImageView image;
TextView title;
TextView text;
}
}

其中的布局文件activity_main.xml如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.yidian.news.packinfo.MainActivity">

<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</RelativeLayout>

list_item的布局文件如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/ItemImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</ImageView>

<TextView
android:id="@+id/ItemTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/ItemImage"
android:textSize="25sp" >
</TextView>

<TextView
android:id="@+id/ItemText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/ItemImage"
android:layout_below="@id/ItemTitle"
android:textSize="15sp" >
</TextView>
</RelativeLayout>