Hi，大家好，我是编程小6，很荣幸遇见你，我把这些年在开发过程中遇到的问题或想法写出来，今天说一说applist[通俗易懂],希望能够帮助你!!!。
package com.proj.applist;

import android.content.Intent;

import android.graphics.drawable.Drawable;

public class AppInfo {

private String appLabel;    

   private Drawable appIcon ;  

   private Intent intent ;     

   private String pkgName ;    

   

   public AppInfo(){}

   

   public String getAppLabel() {

       return appLabel;

   }

   public void setAppLabel(String appName) {

       this.appLabel = appName;

   }

   public Drawable getAppIcon() {

       return appIcon;

   }

   public void setAppIcon(Drawable appIcon) {

       this.appIcon = appIcon;

   }

   public Intent getIntent() {

       return intent;

   }

   public void setIntent(Intent intent) {

       this.intent = intent;

   }

   public String getPkgName(){

       return pkgName ;

   }

   public void setPkgName(String pkgName){

       this.pkgName=pkgName ;

   }

}

package com.proj.applist;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class BrowseApplicationInfoAdapter extends BaseAdapter {

private List<AppInfo> mlistAppInfo = null;
    
    LayoutInflater infater = null;
    
    public BrowseApplicationInfoAdapter(Context context,  List<AppInfo> apps) {

        infater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        mlistAppInfo = apps ;
    }
    @Override
    public int getCount() {

        // TODO Auto-generated method stub
        System.out.println("size" + mlistAppInfo.size());
        return mlistAppInfo.size();
    }
    @Override
    public Object getItem(int position) {

        // TODO Auto-generated method stub
        return mlistAppInfo.get(position);
    }
    @Override
    public long getItemId(int position) {

        // TODO Auto-generated method stub
        return 0;
    }
    @Override
    public View getView(int position, View convertview, ViewGroup arg2) {

        System.out.println("getView at " + position);
        View view = null;
        ViewHolder holder = null;
        if (convertview == null || convertview.getTag() == null) {

            view = infater.inflate(R.layout.browse_app_item, null);
            holder = new ViewHolder(view);
            view.setTag(holder);
        } 
        else{

            view = convertview ;
            holder = (ViewHolder) convertview.getTag() ;
        }
        AppInfo appInfo = (AppInfo) getItem(position);
        holder.appIcon.setImageDrawable(appInfo.getAppIcon());
        holder.tvAppLabel.setText(appInfo.getAppLabel());
        holder.tvPkgName.setText(appInfo.getPkgName());
        return view;
    }

    class ViewHolder {

        ImageView appIcon;
        TextView tvAppLabel;
        TextView tvPkgName;

        public ViewHolder(View view) {

            this.appIcon = (ImageView) view.findViewById(R.id.imgApp);
            this.tvAppLabel = (TextView) view.findViewById(R.id.tvAppLabel);
            this.tvPkgName = (TextView) view.findViewById(R.id.tvPkgName);
        }
    }

}

package com.proj.applist;

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

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

public class MainActivity extends Activity implements OnItemClickListener{

private ListView listview = null;

   private List<AppInfo> mlistAppInfo = null;

   @Override
   public void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);
       setContentView(R.layout.broswe_app_list);

       listview = (ListView) findViewById(R.id.listviewApp);
       mlistAppInfo = new ArrayList<AppInfo>();
       queryAppInfo(); // 鏌ヨ鎵€鏈夊簲鐢ㄧ▼搴忎俊鎭?
       BrowseApplicationInfoAdapter browseAppAdapter = new BrowseApplicationInfoAdapter(
               this, mlistAppInfo);
       listview.setAdapter(browseAppAdapter);
       listview.setOnItemClickListener(this);
   }
   // 鐐瑰嚮璺宠浆鑷宠搴旂敤绋嬪簭
   public void onItemClick(AdapterView<?> arg0, View view, int position,
           long arg3) {

       // TODO Auto-generated method stub
       Intent intent = mlistAppInfo.get(position).getIntent();
       startActivity(intent);
   }
   // 鑾峰緱鎵€鏈夊惎鍔ˋctivity鐨勪俊鎭紝绫讳技浜嶭aunch鐣岄潰
   public void queryAppInfo() {

       PackageManager pm = this.getPackageManager(); //鑾峰緱PackageManager瀵硅薄
       Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
       mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
       // 閫氳繃鏌ヨ锛岃幏寰楁墍鏈塕esolveInfo瀵硅薄.
       List<ResolveInfo> resolveInfos = pm
               .queryIntentActivities(mainIntent, 0);//0 Launcher涓殑搴旂敤,PackageManager.MATCH_DEFAULT_ONLY鎵€鏈夊簲鐢?

            Log.d("count","appList_count:"+resolveInfos.size());
       // 璋冪敤绯荤粺鎺掑簭 锛?鏍规嵁name鎺掑簭
       // 璇ユ帓搴忓緢閲嶈锛屽惁鍒欏彧鑳芥樉绀虹郴缁熷簲鐢紝鑰屼笉鑳藉垪鍑虹涓夋柟搴旂敤绋嬪簭
       Collections.sort(resolveInfos,new ResolveInfo.DisplayNameComparator(pm));
       if (mlistAppInfo != null) {

           mlistAppInfo.clear();
           for (ResolveInfo reInfo : resolveInfos) {

               String activityName = reInfo.activityInfo.name; // 鑾峰緱璇ュ簲鐢ㄧ▼搴忕殑鍚姩Activity鐨刵ame
               String pkgName = reInfo.activityInfo.packageName; // 鑾峰緱搴旂敤绋嬪簭鐨勫寘鍚?
               String appLabel = (String) reInfo.loadLabel(pm); // 鑾峰緱搴旂敤绋嬪簭鐨凩abel
               Drawable icon = reInfo.loadIcon(pm); // 鑾峰緱搴旂敤绋嬪簭鍥炬爣
               // 涓哄簲鐢ㄧ▼搴忕殑鍚姩Activity 鍑嗗Intent
               Intent launchIntent = new Intent();
               launchIntent.setComponent(new ComponentName(pkgName,
                       activityName));
               // 鍒涘缓涓€涓狝ppInfo瀵硅薄锛屽苟璧嬪€?
               AppInfo appInfo = new AppInfo();
               appInfo.setAppLabel(appLabel);
               appInfo.setPkgName(pkgName);
               appInfo.setAppIcon(icon);
               appInfo.setIntent(launchIntent);
               mlistAppInfo.add(appInfo); // 娣诲姞鑷冲垪琛ㄤ腑
           }
       }
   }

}

<?xml version="1.0"?>

-<RelativeLayout tools:context=".MainActivity" android:paddingTop="@dimen/activity_vertical_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingBottom="@dimen/activity_vertical_margin" android:layout_height="match_parent" android:layout_width="match_parent" xmlns:tools="http://schemas.android.com/tools" xmlns:android="http://schemas.android.com/apk/res/android">

<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/hello_world"/>

</RelativeLayout>

<?xml version="1.0" encoding="UTF-8"?>

-<LinearLayout android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">
> 
<ListView android:layout_height="fill_parent" android:layout_width="fill_parent" android:id="@+id/listviewApp"/>

</LinearLayout>

<?xml version="1.0" encoding="UTF-8"?>

-<LinearLayout android:layout_height="50dip" android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">

<ImageView android:layout_height="fill_parent" android:layout_width="wrap_content" android:id="@+id/imgApp"/>

-<RelativeLayout android:layout_height="40dip" android:layout_width="fill_parent" android:layout_marginLeft="10dip">

<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/tvLabel" android:text="AppLable : "/>

<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/tvAppLabel" android:layout_marginLeft="3dip" android:text="Label" android:textColor="#FFD700" android:layout_toRightOf="@id/tvLabel"/>

<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/tvName" android:text="包名:" android:layout_below="@id/tvLabel"/>

<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/tvPkgName" android:textColor="#FFD700" android:layout_below="@id/tvAppLabel" android:layout_alignLeft="@id/tvAppLabel"/>

</RelativeLayout>

</LinearLayout>