检查APK版本并更新（服务器和客户端一起来）
一.首先我们思考一下步骤
1，获取当前APK的版本
2，去服务器上获取最新的版本
3，对比后，决定是否更新。
4，更新，去服务器上下载apk.
5.下载后，保存到sd卡，然后安装apk
二，客户端代码如下
package com.zhenshi.updataapk;
import java.io.File;
import com.zhenshi.util.HttpConnect;
import com.zhenshi.util.ToastUtil;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
/**
* class name:TestUpdataActivity<BR>
* class description:<BR>
* PS： <BR>
*
* @version 1.00 2012-4-5
* @author ZHENSHI)peijiangping
*/
public class TestUpdataActivity extends Activity {
private String packageName;
private ProgressDialog pBar;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
yesOrNoUpdataApk();
}
/**
* Role:是否更新版本<BR>
* Date:2012-4-5<BR>
*
* @author ZHENSHI)peijiangping
*/
private int yesOrNoUpdataApk() {
packageName = this.getPackageName();
String nowVersion = getVerCode(TestUpdataActivity.this);
String newVersion = goToCheckNewVersion();
if (newVersion.equals("Error")) {
return 0;
}
if (Double.valueOf(newVersion) > Double.valueOf(nowVersion)) {
doNewVersionUpdate(nowVersion, newVersion);
}
return 1;
}
/**
* Role:是否进行更新提示框<BR>
* Date:2012-4-5<BR>
*
* @author ZHENSHI)peijiangping
*/
private void doNewVersionUpdate(String nowVersion, String newVersion) {
StringBuffer sb = new StringBuffer();
sb.append("当前版本:");
sb.append(nowVersion);
sb.append(", 发现新版本:");
sb.append(newVersion);
sb.append(", 是否更新?");
Dialog dialog = new AlertDialog.Builder(TestUpdataActivity.this)
.setTitle("软件更新")
.setMessage(sb.toString())
// 设置内容
.setPositiveButton("更新",// 设置确定按钮
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
pBar = new ProgressDialog(
TestUpdataActivity.this);
pBar.setTitle("正在下载");
pBar.setMessage("请稍候...");
// pBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);
pBar.show();
goToDownloadApk();
}
})
.setNegativeButton("暂不更新",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// 点击"取消"按钮之后退出程序
finish();
}
}).create();// 创建
// 显示对话框
dialog.show();
}
/**
* Role:开启下载apk的线程<BR>
* Date:2012-4-6<BR>
*
* @author ZHENSHI)peijiangping
*/
private void goToDownloadApk() {
new Thread(new DownloadApkThread(handler)).start();
}
public Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
super.handleMessage(msg);
if (msg.what == 1) {
ToastUtil toastUtil = new ToastUtil(TestUpdataActivity.this);
toastUtil.showDefultToast("下载成功！！").show();
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
Uri.fromFile(new File("/sdcard/update/", "updata.apk")),
"application/vnd.android.package-archive");
startActivity(intent);
} else {
ToastUtil toastUtil = new ToastUtil(TestUpdataActivity.this);
toastUtil.showDefultToast("下载失败！！").show();
}
pBar.cancel();
}
};
/**
* Role:去获取当前的应用最新版本<BR>
* Date:2012-4-5<BR>
*
* @author ZHENSHI)peijiangping
*/
private String goToCheckNewVersion() {
System.out.println("goToCheckNewVersion");
String newVersion = null;
final String url = "http://192.168.1.41:8080/TestHttpServlet/GetVersionServlet";
HttpConnect hc = new HttpConnect(url, this);
newVersion = hc.getDataAsString(null);
if (newVersion.equals("Error")) {
return "Error";
}
return newVersion;
}
/**
* Role:取得程序的当前版本<BR>
* Date:2012-4-5<BR>
*
* @author ZHENSHI)peijiangping
*/
private String getVerCode(Context context) {
int verCode = 0;
String verName = null;
try {
verCode = context.getPackageManager()
.getPackageInfo(packageName, 0).versionCode;
verName = context.getPackageManager()
.getPackageInfo(packageName, 0).versionName;
} catch (NameNotFoundException e) {
System.out.println("no");
}
System.out.println("verCode" + verCode + "===" + "verName" + verName);
return verName;
}
}
package com.zhenshi.updataapk;
import com.zhenshi.util.HttpDownload;
import android.os.Handler;
import android.os.Message;
/**
* class name:DownloadApkThread<BR>
* class description:下载apk的线程<BR>
* PS： <BR>
*
* @version 1.00 2012-4-5
* @author ZHENSHI)peijiangping
*/
public class DownloadApkThread implements Runnable {
private Handler handler;
private static final String url = "http://192.168.1.41:8080/TestHttpServlet/apk/TestUpdata.apk";
private static final String fileName = "updata.apk";
private static final String path = "/sdcard/update";
public DownloadApkThread(Handler handler) {
this.handler = handler;
}
@Override
public void run() {
System.out.println("下载线程开启");
Message message = new Message();
message.what = HttpDownload.downLoadFile(url, fileName, path);
handler.sendMessage(message);
}
}
package com.zhenshi.util;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import android.content.Context;
import android.util.Log;
/**
* class name：HttpConnect<BR>
* class description：http请求工具类<BR>
* PS： <BR>
*
* @version 1.00 2011/09/21
* @author CODYY)peijiangping
*/
public class HttpConnect {
/**
* 访问的Web服务器地址
*/
private String url;
private HttpPost httpRequest;
private HttpResponse httpResponse;
private HttpParams httpParams;
private HttpClient httpClient;
public HttpConnect(String url, Context context) {
this.url = url;
httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 15000);
HttpConnectionParams.setSoTimeout(httpParams, 15000);
httpClient = new DefaultHttpClient(httpParams);
}
/**
* Role:通过Http请求来获取返回值(InputStream) <BR>
* Date:2012-2-10 <BR>
*
* @author CODYY)peijiangping
*/
public InputStream getDataAsInputStream(List<NameValuePair> params) {
InputStream result = null;
try {
httpRequest = new HttpPost(url);
if (params != null) {
httpRequest.setEntity(new UrlEncodedFormEntity(params,
HTTP.UTF_8));
}
httpResponse = httpClient.execute(httpRequest);
if (200 == httpResponse.getStatusLine().getStatusCode()) {
result = httpResponse.getEntity().getContent();
}
} catch (IOException e) {
Log.e("nimeimei", e.getMessage(), e);
return result;
}
return result;
}
/**
* Role:通过Http请求来获取返回值(String),异常返回Error<BR>
* Date:2012-2-10 <BR>
*
* @author CODYY)peijiangping
*/
public String getDataAsString(List<NameValuePair> params) {
String result = null;
try {
httpRequest = new HttpPost(url);
if (params != null) {
httpRequest.setEntity(new UrlEncodedFormEntity(params,
HTTP.UTF_8));
}
httpResponse = httpClient.execute(httpRequest);
if (200 == httpResponse.getStatusLine().getStatusCode()) {
result = EntityUtils.toString(httpResponse.getEntity());
System.out.println("取得返回值" + result);
}
} catch (IOException e) {
e.printStackTrace();
return "Error";
}
return result;
}
/**
* Role:通过Http请求来获取返回值(int),失败返回-1，成功返回数据 <BR>
* Date:2012-2-10 <BR>
*
* @author CODYY)peijiangping
*/
public int getDataAsInt(List<NameValuePair> params) {
int result = -1;
try {
httpRequest = new HttpPost(url);
if (params != null) {
httpRequest.setEntity(new UrlEncodedFormEntity(params,
HTTP.UTF_8));
}
httpResponse = httpClient.execute(httpRequest);
if (200 == httpResponse.getStatusLine().getStatusCode()) {
result = Integer.parseInt(EntityUtils.toString(httpResponse
.getEntity()));
}
} catch (IOException e) {
return result;
}
return result;
}
/**
* Role:http请求服务器，不取得返回数据，成功返回1<BR>
* Date:2012-2-10 <BR>
*
* @author CODYY)peijiangping
*/
public int sendToService(List<NameValuePair> params) {
try {
httpRequest = new HttpPost(url);
if (params != null) {
httpRequest.setEntity(new UrlEncodedFormEntity(params,
HTTP.UTF_8));
}
httpResponse = httpClient.execute(httpRequest);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
return 1;
}
}
package com.zhenshi.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
/**
* 类名：HttpDownload<BR>
* 作用：下载文件的类<BR>
* 日期：2012-4-5<BR>
*
* @version V1.0
* @author peijiangping
*/
public class HttpDownload {
/**
* 功能：下载文件到指定目录下，成功返回1<BR>
* 日期：2012-4-5<BR>
* 作者：裴江平
*/
public static int downLoadFile(String httpUrl, String fileName, String path) {
FileOutputStream fos = null;
InputStream is = null;
HttpURLConnection conn = null;
// 当存放文件的文件目录不存在的时候创建文件目录
File tmpFile = new File(path);
if (!tmpFile.exists()) {
tmpFile.mkdir();
}
// 获取文件对象
File file = new File(path + "/"+fileName);
try {
URL url = new URL(httpUrl);
try {
conn = (HttpURLConnection) url.openConnection();
is = conn.getInputStream();// 获得http请求返回的InputStream对象。
fos = new FileOutputStream(file);// 获得文件输出流对象来写文件用的
byte[] buf = new byte[256];
conn.connect();// http请求服务器
double count = 0;
// http请求取得响应的时候
if (conn.getResponseCode() >= 400) {
System.out.println("nono");
return 0;
} else {
while (count <= 100) {
if (is != null) {
int numRead = is.read(buf);
if (numRead <= 0) {
break;
} else {
fos.write(buf, 0, numRead);
}
} else {
break;
}
}
}
conn.disconnect();
fos.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
return 0;
} finally {
if (conn != null) {
conn.disconnect();
conn = null;
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
fos = null;
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
is = null;
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
return 0;
}
return 1;
}
}
package com.zhenshi.util;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
/**
* class name：ToastUtil<BR>
* class description：显示toast的一个工具类<BR>
* PS： <BR>
*
* @version 1.00 2011/09/30
* @author CODYY)peijiangping
*/
public class ToastUtil {
private Context context;
public ToastUtil(Context context) {
this.context = context;
}
/**
* @param title
* @param icon
* @return返回一个带图片的toast
*/
public Toast showPicToast(String title, Drawable icon) {
Toast toast = Toast.makeText(context, title, Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
LinearLayout toastView = (LinearLayout) toast.getView();
ImageView imageCodeProject = new ImageView(context);
imageCodeProject.setBackgroundDrawable(icon);
toastView.addView(imageCodeProject, 0);
return toast;
}
/**
* @param title
* @return返回一个默认的toast
*/
public Toast showDefultToast(String title) {
Toast toast = Toast.makeText(context, title, Toast.LENGTH_SHORT);
return toast;
}
/**
* @param layoutid
* @return返回一个自定义的toast
*/
public Toast showDiyToast(int layoutid) {
LayoutInflater inflater = LayoutInflater.from(context);
View myView = inflater.inflate(layoutid,null);
Toast toast = new Toast(context);
toast.setGravity(Gravity.RIGHT | Gravity.TOP, 12, 40);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(myView);
return toast;
}
}
三，服务器代码如下：
package com.zhenshi.servlet;
import java.io.IOException;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.zhenshi.util.SerialPortListener;
/**
* class name:GetVersionServlet<BR>
* class description:获取最新的软件版本<BR>
* PS： <BR>
*
* @version 1.00 2012-4-6
* @author ZHENSHI)peijiangping
*/
public class GetVersionServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public Map<String, String> configMap;
/**
* @see HttpServlet#HttpServlet()
*/
public GetVersionServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
configMap = SerialPortListener.configMap;
String version = configMap.get("version");
System.out.println(version);
response.getWriter().write(version);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
/* 接收post请求 */
doGet(request, response);
}
}
package com.zhenshi.util;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
/**
* class name：SerialPortListener<BR>
* class description：WEb服务器启动监听类<BR>
* PS： <BR>
* Date:2012-2-16<BR>
*
* @version 1.00
* @author CODYY)peijiangping
*/
public class SerialPortListener implements ServletContextListener {
public static Map<String, String> configMap;
public void contextInitialized(ServletContextEvent event) {
ServletContext context = event.getServletContext();
String path = context.getRealPath("/");
path = path.replace("\\", "/");
path = path.replace("/WebContent", "");
configMap = findConfig(path);
// context.setAttribute("configMap", configMap);
}
public void contextDestroyed(ServletContextEvent arg0) {
}
public Map<String, String> findConfig(String path) {
Map<String, String> configMap = new HashMap<String, String>();
FileReader fr = null;
BufferedReader br = null;
try {
fr = new FileReader(path + "conf/config.properties");// 创建FileReader对象，用来读取字符流
br = new BufferedReader(fr); // 缓冲指定文件的输入
String myreadline; // 定义一个String类型的变量,用来每次读取一行
while (br.ready()) {
myreadline = br.readLine();
String[] keyAndValue = myreadline.split("=");
if (keyAndValue.length == 2) {
configMap.put(keyAndValue[0].trim(), keyAndValue[1].trim());
} else if (keyAndValue.length > 2) {
String keyName = myreadline.substring(0,
myreadline.indexOf("="));
String keyValue = myreadline.substring(myreadline
.indexOf("=") + 1);
configMap.put(keyName.trim(), keyValue.trim());
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fr != null) {
try {
fr.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return configMap;
}
}
config.properties内容为：
#config version=1.0
web.xml内容为：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>TestHttpServlet</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<listener>
<listener-class>com.zhenshi.util.SerialPortListener</listener-class>
</listener>
<servlet>
<description></description>
<display-name>GetVersionServlet</display-name>
<servlet-name>GetVersionServlet</servlet-name>
<servlet-class>com.zhenshi.servlet.GetVersionServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>GetVersionServlet</servlet-name>
<url-pattern>/GetVersionServlet</url-pattern>
</servlet-mapping>
</web-app>
服务器为Tomcat.
Androidmainfest.xml记得加上一些应用相关权限。