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>