本文实例为大家分享了Android App自动更新通知栏下载的具体代码，供大家参考，具体内容如下

版本更新说明

这里有调用UpdateService启动服务检查下载安装包等

1. 文件下载，下完后写入到sdcard

2. 如何在通知栏上显示下载进度

3. 下载完毕自动安装

4. 如何判断是否有新版本

版本更新的主类

package com.wei.update;

import java.io.IOException;

import java.io.InputStream;

import java.net.URL;

import java.util.HashMap;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import org.json.JSONException;

import org.json.JSONObject;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import org.xmlpull.v1.XmlPullParserFactory;

import com.wei.util.MyApplication;

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.PackageManager.NameNotFoundException;

import android.os.Handler;

/**

* 版本更新主类,这里有调用UpdateService启动服务检查下载安装包等 1. 文件下载，下完后写入到sdcard 2. 如何在通知栏上显示下载进度

* 3. 下载完毕自动安装 4. 如何判断是否有新版本

*

* @author david

*/

public class UpdateManager {

private static String packageName;// = "com.yipinzhe"; // 应用的包名

private static String jsonUrl = "version.txt"; // JSON版本文件URL

private static String xmlUrl = "version.xml"; // XML版本文件URL

private static final String DOWNLOAD_DIR = "/"; // 应用下载后保存的子目录

private Context mContext;

HashMap mHashMap;// 保存解析的XML信息

int versionCode, isNew;

public UpdateManager(Context context) {

this.mContext = context;

packageName = context.getPackageName();

jsonUrl = MyApplication.site + jsonUrl;

xmlUrl = MyApplication.site + xmlUrl;

checkVersion();

}

Handler checkHandler = new Handler() {

@Override

public void handleMessage(android.os.Message msg) {

if (msg.what == 1) {

// 发现新版本，提示用户更新

StringBuffer message = new StringBuffer();

message.append(mHashMap.get("note").replace("|", "\n"));

AlertDialog.Builder alert = new AlertDialog.Builder(mContext);

alert.setTitle("软件升级")

.setMessage(message.toString())

.setPositiveButton("更新",

new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog,

int which) {

// 开启更新服务UpdateService

System.out.println("你点击了更新");

Intent updateIntent = new Intent(

mContext, UpdateService.class);

/**

* updateIntent.putExtra("downloadDir",

* DOWNLOAD_DIR);

* updateIntent.putExtra("apkUrl",

* mHashMap.get("url"));

*/

mContext.startService(updateIntent);

}

})

.setNegativeButton("取消",

new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog,

int which) {

dialog.dismiss();

}

});

alert.create().show();

}

};

};

/**

*检查是否有新版本

*/

public void checkVersion() {

try {

// 获取软件版本号,对应AndroidManifest.xml下android:versionCode

versionCode = mContext.getPackageManager().getPackageInfo(

packageName, 0).versionCode;

} catch (NameNotFoundException e) {

e.printStackTrace();

}

new Thread() {

@Override

public void run() {

String result = null;

/**

* try { //如果服务器端是JSON文本文件 result =

* MyApplication.handleGet(jsonUrl); if (result != null) {

* mHashMap = parseJSON(result); } } catch (Exception e1) {

* e1.printStackTrace(); }

*/

InputStream inStream = null;

try {

// 本机XML文件

inStream = UpdateManager.class.getClassLoader().getResourceAsStream("version.xml");

// 如果服务器端是XML文件

inStream = new URL(xmlUrl).openConnection().getInputStream();

if (inStream != null)

mHashMap = parseXml(inStream);

} catch (Exception e1) {

e1.printStackTrace();

}

if (mHashMap != null) {

int serviceCode = Integer.valueOf(mHashMap.get("version"));

if (serviceCode > versionCode) {// 版本判断,返回true则有新版本

isNew = 1;

}

}

checkHandler.sendEmptyMessage(isNew);

};

}.start();

}

/**

*解析服务器端的JSON版本文件

*/

public HashMap parseJSON(String str) {

HashMap hashMap = new HashMap();

try {

JSONObject obj = new JSONObject(str);

hashMap.put("version", obj.getString("version"));

hashMap.put("name", obj.getString("name"));

hashMap.put("url", obj.getString("url"));

hashMap.put("note", obj.getString("note"));

} catch (JSONException e) {

e.printStackTrace();

}

return hashMap;

}

/**

*解析服务器端的XML版本文件

*/

public HashMap parseXml(InputStream inputStream) {

HashMap hashMap = new HashMap();

try {

XmlPullParser parser = XmlPullParserFactory.newInstance().newPullParser();

parser.setInput(inputStream, "GBK");//设置数据源编码

int eventCode = parser.getEventType();//获取事件类型

while(eventCode != XmlPullParser.END_DOCUMENT) {

System.out.println("循环开始");

switch (eventCode){

case XmlPullParser.START_DOCUMENT: //开始读取XML文档

System.out.println("START_DOCUMENT");

break;

case XmlPullParser.START_TAG://开始读取某个标签

if("version".equals(parser.getName())) {

hashMap.put(parser.getName(), parser.nextText());

} else if("name".equals(parser.getName())) {

hashMap.put(parser.getName(), parser.nextText());

} else if("url".equals(parser.getName())) {

hashMap.put(parser.getName(), parser.nextText());

} else if("note".equals(parser.getName())) {

hashMap.put(parser.getName(), parser.nextText());

}

break;

case XmlPullParser.END_TAG:

break;

}

eventCode = parser.next();//继续读取下一个元素节点，并获取事件码

}

System.out.println(hashMap.get("version"));

} catch(Exception e) {

}

return hashMap;

/**

*try {

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();

Document document = builder.parse(inStream);

Element root = document.getDocumentElement();//获取根节点

NodeList childNodes = root.getChildNodes();//获得所有子节点,然后遍历

for (int j = 0; j < childNodes.getLength(); j++) {

Node childNode = childNodes.item(j);

if (childNode.getNodeType() == Node.ELEMENT_NODE) {

Element childElement = (Element) childNode;

if ("version".equals(childElement.getNodeName())) {

hashMap.put("version", childElement.getFirstChild()

.getNodeValue());

}

else if (("name".equals(childElement.getNodeName()))) {

hashMap.put("name", childElement.getFirstChild()

.getNodeValue());

}

else if (("url".equals(childElement.getNodeName()))) {

hashMap.put("url", childElement.getFirstChild()

.getNodeValue());

} else if (("note".equals(childElement.getNodeName()))) {

hashMap.put("note", childElement.getFirstChild()

.getNodeValue());

}

}

}

} catch (Exception e) {

e.printStackTrace();

}*/

}

}

版本更新的服务类

package com.wei.update;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import com.wei.util.MyApplication;

import com.wei.wotao.R;

//import android.annotation.SuppressLint;

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;

import android.view.View;

import android.widget.RemoteViews;

/**

* 下载安装包的服务类

* @author david

*/

public class UpdateService extends Service {

// 文件存储

private File saveDir;

private File saveFile;

private String apkUrl;

// 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;

// 下载状态

private final static int DOWNLOAD_COMPLETE = 0;

private final static int DOWNLOAD_FAIL = 1;

private RemoteViews contentView;

@Override

public int onStartCommand(Intent intent, int flags, int startId) {

System.out.println("onStartCommand");

contentView = new RemoteViews(getPackageName(), R.layout.activity_app_update);

// 获取传值

String downloadDir = intent.getStringExtra("downloadDir");

apkUrl = MyApplication.site+intent.getStringExtra("apkUrl");

// 如果有SD卡,则创建APK文件

if (android.os.Environment.MEDIA_MOUNTED.equals(android.os.Environment

.getExternalStorageState())) {

saveDir = new File(Environment.getExternalStorageDirectory(),

downloadDir);

saveFile = new File(saveDir.getPath(), getResources()

.getString(R.string.app_name) + ".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();

updatePendingIntent = PendingIntent.getActivity(this, 0, updateIntent, 0);

// 设置通知栏显示内容

updateNotification.icon = R.drawable.icon_info;

updateNotification.tickerText = "开始下载";

updateNotification.contentView.setProgressBar(R.id.progressBar1, 100, 0, true);

updateNotification.setLatestEventInfo(this,

getResources().getString(R.string.app_name), "0%",

updatePendingIntent);

// 发出通知

updateNotificationManager.notify(0, updateNotification);

new Thread(new DownloadThread()).start();

return super.onStartCommand(intent, flags, startId);

}

@Override

public IBinder onBind(Intent intent) {

return null;

}

/**

*下载的线程

*/

private class DownloadThread implements Runnable {

Message message = updateHandler.obtainMessage();

public void run() {

message.what = DOWNLOAD_COMPLETE;

if (saveDir!=null && !saveDir.exists()) {

saveDir.mkdirs();

}

if (saveFile!=null && !saveFile.exists()) {

try {

saveFile.createNewFile();

} catch (IOException e) {

e.printStackTrace();

}

}

try {

long downloadSize = downloadFile(apkUrl, saveFile);

if (downloadSize > 0) {// 下载成功

updateHandler.sendMessage(message);

}

} catch (Exception ex) {

ex.printStackTrace();

message.what = DOWNLOAD_FAIL;

updateHandler.sendMessage(message);// 下载失败

}

}

public long downloadFile(String downloadUrl, File saveFile)

throws Exception {

int downloadCount = 0;

int currentSize = 0;

long totalSize = 0;

int updateTotalSize = 0;

int rate = 0;// 下载完成比例

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(200000);

httpConnection.setReadTimeout(200000);

updateTotalSize = httpConnection.getContentLength();//获取文件大小

if (httpConnection.getResponseCode() == 404) {

throw new Exception("fail!");

}

is = httpConnection.getInputStream();

fos = new FileOutputStream(saveFile, false);

byte buffer[] = new byte[1024 * 1024 * 3];

int readsize = 0;

while ((readsize = is.read(buffer)) != -1) {

fos.write(buffer, 0, readsize);

totalSize += readsize;//已经下载的字节数

rate = (int) (totalSize * 100 / updateTotalSize);//当前下载进度

// 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) || rate - 0 > downloadCount) {

downloadCount += 1;

updateNotification.setLatestEventInfo(

UpdateService.this, "正在下载", rate + "%",

updatePendingIntent);//设置通知的内容、标题等

updateNotification.contentView.setProgressBar(R.id.progressBar1, 100, rate, true);

updateNotificationManager.notify(0, updateNotification);//把通知发布出去

}

}

} finally {

if (httpConnection != null) {

httpConnection.disconnect();

}

if (is != null) {

is.close();

}

if (fos != null) {

fos.close();

}

}

return totalSize;

}

}

private Handler updateHandler = new Handler() {

@Override

public void handleMessage(Message msg) {

switch (msg.what) {

case DOWNLOAD_COMPLETE:

//当下载完毕，自动安装APK(ps,打电话 发短信的启动界面工作)

Uri uri = Uri.fromFile(saveFile);//根据File获得安装包的资源定位符

Intent installIntent = new Intent(Intent.ACTION_VIEW);//设置Action

installIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//新的Activity会在一个新任务打开，而不是在原先的任务栈

installIntent.setDataAndType(uri, "application/vnd.android.package-archive");//设置URI的数据类型

startActivity(installIntent);//把打包的Intent传递给startActivity

//当下载完毕，更新通知栏，且当点击通知栏时，安装APK

updatePendingIntent = PendingIntent.getActivity(UpdateService.this, 0, installIntent, 0);

updateNotification.defaults = Notification.DEFAULT_SOUND;// 铃声提醒

updateNotification.setLatestEventInfo(UpdateService.this, getResources().getString(R.string.app_name),

"下载完成,点击安装", updatePendingIntent);

updateNotificationManager.notify(0, updateNotification);

// 停止服务

stopService(updateIntent);

break;

case DOWNLOAD_FAIL:

// 下载失败

updateNotification.setLatestEventInfo(UpdateService.this,

getResources().getString(R.string.app_name),

"下载失败,网络连接超时", updatePendingIntent);

updateNotificationManager.notify(0, updateNotification);

break;

default:

stopService(updateIntent);

break;

}

}

};

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。