android 下载应用 通知栏显示进度 下完之后点击安装

android 下载应用 通知栏显示进度 下完之后点击安装

【转载】http://www.cnblogs.com/liaolandemengxiang/archive/2012/11/08/2760065.html

先看效果图： 这是本人的习惯，先上图显示效果，看是否是想要的，再看代码。有图有真相

代码：

 main

package com.gem.hsx.appupdate;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Main extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button btnok=(Button) findViewById(R.id.btnok);
        btnok.setOnClickListener(new BtnokOnClickListener());
    }

    private class BtnokOnClickListener implements OnClickListener 
    {

        @Override
        public void onClick(View v) {
            Intent updateIntent =new Intent(Main.this, UpdateService.class);
            updateIntent.putExtra("titleId",R.string.app_name);
            startService(updateIntent);

        }
    }
}

UpdateService:

package com.gem.hsx.appupdate;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;

public class UpdateService extends Service{
    //标题
    private int titleId = 0;
    private final static int DOWNLOAD_COMPLETE = 0;
    private final static int DOWNLOAD_FAIL = 1; 
    //文件存储
    private File updateDir = null;
    private File updateFile = null;
     
    //通知栏
    private NotificationManager updateNotificationManager = null;
    private Notification updateNotification = null;
    //通知栏跳转Intent
    private Intent updateIntent = null;
    private PendingIntent updatePendingIntent = null;
    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onCreate() {
        
        super.onCreate();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        //获取传值
        titleId = intent.getIntExtra("titleId",0);
        //创建文件
        if(android.os.Environment.MEDIA_MOUNTED.equals(android.os.Environment.getExternalStorageState())){
            updateDir = new File(Environment.getExternalStorageDirectory(),"app/download/");
            updateFile = new File(updateDir.getPath(),getResources().getString(titleId)+".apk");
        }
     
        this.updateNotificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
        this.updateNotification = new Notification();
     
        //设置下载过程中，点击通知栏，回到主界面
        updateIntent = new Intent(this, Main.class);
        updatePendingIntent = PendingIntent.getActivity(this,0,updateIntent,0);
        //设置通知栏显示内容
        updateNotification.icon = R.drawable.ic_launcher;
        updateNotification.tickerText = "开始下载";
        updateNotification.setLatestEventInfo(this,"上海地铁","0%",updatePendingIntent);
        //发出通知
        updateNotificationManager.notify(0,updateNotification);
     
        //开启一个新的线程下载，如果使用Service同步下载，会导致ANR问题，Service本身也会阻塞
        new Thread(new updateRunnable()).start();//这个是下载的重点，是下载的过程
         
        return super.onStartCommand(intent, flags, startId);
    }
    private Handler updateHandler = new  Handler(){
        @Override
        public void handleMessage(Message msg) {
             switch(msg.what){
                case DOWNLOAD_COMPLETE:
                    updateNotification.flags|=updateNotification.FLAG_AUTO_CANCEL;
                    //点击安装PendingIntent
                    Uri uri = Uri.fromFile(updateFile);
                    Intent installIntent = new Intent(Intent.ACTION_VIEW);
                    installIntent.setDataAndType(uri, "application/vnd.android.package-archive");
                    updatePendingIntent = PendingIntent.getActivity(UpdateService.this, 0, installIntent, 0);
                     
                    updateNotification.defaults = Notification.DEFAULT_SOUND;//铃声提醒 
                    updateNotification.setLatestEventInfo(UpdateService.this, "上海地铁", "下载完成,点击安装。", updatePendingIntent);
                    updateNotificationManager.notify(0, updateNotification);
                     
                    //停止服务
                    stopService(updateIntent);
                case DOWNLOAD_FAIL:
                    //下载失败
                    updateNotification.setLatestEventInfo(UpdateService.this, "上海地铁", "下载完成,点击安装。", updatePendingIntent);
                    updateNotificationManager.notify(0, updateNotification);
                default:
                    stopService(updateIntent);
            }  
        }
    };
    
    
    class updateRunnable implements Runnable {
        Message message = updateHandler.obtainMessage();
        public void run() {
            message.what = DOWNLOAD_COMPLETE;
            try{
                //增加权限<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE">;
                if(!updateDir.exists()){
                    updateDir.mkdirs();
                }
                if(!updateFile.exists()){
                    updateFile.createNewFile();
                }
                //下载函数，以QQ为例子
                //增加权限<uses-permission android:name="android.permission.INTERNET">;
                long downloadSize = downloadUpdateFile("http://softfile.3g.qq.com:8080/msoft/179/1105/10753/MobileQQ1.0(Android)_Build0198.apk",updateFile);
                if(downloadSize>0){
                    //下载成功
                    updateHandler.sendMessage(message);
                }
            }catch(Exception ex){
                ex.printStackTrace();
                message.what = DOWNLOAD_FAIL;
                //下载失败
                updateHandler.sendMessage(message);
            }
        }
    }
    
    
    
    public long downloadUpdateFile(String downloadUrl, File saveFile) throws Exception {
        //这样的下载代码很多，我就不做过多的说明
        int downloadCount = 0;
        int currentSize = 0;
        long totalSize = 0;
        int updateTotalSize = 0;
         
        HttpURLConnection httpConnection = null;
        InputStream is = null;
        FileOutputStream fos = null;
         
        try {
            URL url = new URL(downloadUrl);
            httpConnection = (HttpURLConnection)url.openConnection();
            httpConnection.setRequestProperty("User-Agent", "PacificHttpClient");
            if(currentSize > 0) {
                httpConnection.setRequestProperty("RANGE", "bytes=" + currentSize + "-");
            }
            httpConnection.setConnectTimeout(10000);
            httpConnection.setReadTimeout(20000);
            updateTotalSize = httpConnection.getContentLength();
            if (httpConnection.getResponseCode() == 404) {
                throw new Exception("fail!");
            }
            is = httpConnection.getInputStream();                   
            fos = new FileOutputStream(saveFile, false);
            byte buffer[] = new byte[4096];
            int readsize = 0;
            while((readsize = is.read(buffer)) > 0){
                fos.write(buffer, 0, readsize);
                totalSize += readsize;
                //为了防止频繁的通知导致应用吃紧，百分比增加10才通知一次
                if((downloadCount == 0)||(int) (totalSize*100/updateTotalSize)-10>downloadCount){ 
                    downloadCount += 10;
                    updateNotification.setLatestEventInfo(UpdateService.this, "正在下载", (int)totalSize*100/updateTotalSize+"%", updatePendingIntent);
                    updateNotificationManager.notify(0, updateNotification);
                }                        
            }
        } finally {
            if(httpConnection != null) {
                httpConnection.disconnect();
            }
            if(is != null) {
                is.close();
            }
            if(fos != null) {
                fos.close();
            }
        }
        return totalSize;
    }
        
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.gem.hsx.appupdate"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="15" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".Main"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name="UpdateService"
            android:label="@string/app_name" >
        </service>
    </application>

</manifest>