小白马卫士项目总结之版本更新

来源：互联网发布：ps做淘宝主图编辑：程序博客网时间：2024/05/16 01:37

版本更新：

实现原理：通过向服务器端发送请求，获取服务端的版本信息，然后再与本机上的软件进行比对，如果版本不一致的话，那就得更新版本！

首先需要一个打开的欢迎界面：

在这个欢迎界面打开的时候就要判断此软件的版本是否要更新！

需要说明的是在服务器端这边的时候，发给客户顿的是一个json数据，为了更加明确的说明一下，服务端的大概代码是这样的：

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONArray;

import cn.cxrh.daomain.mobile;

public class MobileSafeServletextends HttpServlet {

File file = null;

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

List<mobile> mobiles = new ArrayList<mobile>();

mobiles.add(new mobile("2.0","http://192.168.128.1:8080/safemobile_server/software/qqliulanqi.apk","小白马提醒您，软件是否更新！^_^！"));

JSONArray json = JSONArray.fromObject(mobiles);

resp.getOutputStream().write(json.toString().getBytes("utf-8"));

}

@Override

protected void doPost(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

super.doGet(req, resp);

}

注意：这里要说明的是，在服务端进行json数据的发送的时候，还需要用到json的jar包！

然后就是客户端这边的处理了！

首先是需要的一个utils工具类：

package com.example.safemobile_test.utils;

import java.io.ByteArrayOutputStream;

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.ProtocolException;

import java.net.URL;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.ProgressDialog;

import android.content.Context;

import android.os.Environment;

import android.util.Log;

import com.example.safemobile_test.daomain.Info;

public class Utils {

/**

* 读取服务端发过来的输入流信息，并把它转化为字符串

* @param is 输入流

* @return

* @throws Exception

public static String readJson(InputStream is) throws Exception

{

ByteArrayOutputStream bao = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = -1;

while((len = is.read(buffer)) != -1)

{

bao.write(buffer, 0, len);

}

is.close();

bao.close();

return new String(bao.toByteArray());

}

/**

* 用json解析来获取服务端的信息

* @param path这个得路径指的是需要访问服务器端的地址

* @return 返回的是一个javabean的对象

* @throws Exception

public static Info getServerInfo(String path) throws MalformedURLException,ProtocolException,JSONException,IOException,Exception

{

URL url = new URL(path);

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setRequestMethod("GET");

conn.setReadTimeout(5000);

int code = conn.getResponseCode();

if(code == 200)

{

InputStream is = conn.getInputStream();

JSONArray jsonArray = new JSONArray(readJson(is));

Info info = new Info();

for(int i=0; i < jsonArray.length(); i++)

{

JSONObject object = jsonArray.getJSONObject(i);

info.setVersion(object.getString("version"));

info.setDesc(object.getString("desc"));

info.setPath(object.getString("path"));

Log.i("Utils", object.getString("version"));

}

return info;

}

return null;

}

/**

* 从服务端下载需要更新的软件

* @param file 要存放到sdcard的文件的对象

* @param path 要访问服务端的地址

* @param pd 进度条

* @return 返回存放文件的文件对象

public static File updateSoft(File file,String path,ProgressDialog pd)

{

try {

URL url = new URL(path);

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setRequestMethod("GET");

conn.setReadTimeout(5000);

int fileLength = conn.getContentLength();

pd.setMax(fileLength);

int code = conn.getResponseCode();

if(code == 200)

{

FileOutputStream fos = new FileOutputStream(file);

InputStream is= conn.getInputStream();

byte[] buffer =new byte[1024];

int len = -1;

int total = 0;

while((len = is.read(buffer)) != -1)

{

total += len;

fos.write(buffer, 0, len);

pd.setProgress(total);

}

fos.close();

is.close();

pd.dismiss();

return file;

}

} catch (MalformedURLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (ProtocolException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

returnnull;

}

然后就是版本更新的主要代码，也是主类的代码：

package com.example.safemobile_test;

import java.io.File;

import java.io.IOException;

import java.net.MalformedURLException;

import org.apache.http.ProtocolException;

import org.json.JSONException;

import com.example.safemobile_test.daomain.Info;

import com.example.safemobile_test.utils.Utils;

import com.example.service.BlackNumberService;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.AlertDialog.Builder;

import android.app.ProgressDialog;

import android.content.DialogInterface;

import android.content.DialogInterface.OnClickListener;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager.NameNotFoundException;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.widget.TextView;

import android.widget.Toast;

public class splashactivity extends Activity {

protected static final int URL_ERROR = 1;

protected static final int PROTOCOL_ERROR = 2;

protected static final int JSON_PARSER_ERROR = 3;

protected static final int INTERNET_ERROR = 4;

protected static final int READ_DATA_ERROR = 5;

protected static final int LOAD_MAIN = 6;

protected static final int SHOW_DIALOG = 7;

protected static final int UPDADTE_SOFT = 8;

protected static final int DOWNLOAD_FILE_FAILURE = 9;

private TextView tv_splash_version;

private Handler handler;

private long startTime = 0;

private Info info = null;

private ProgressDialog pd;

private File file;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_splash);

tv_splash_version = (TextView) this.findViewById(R.id.te_splash_version);

this.tv_splash_version.setText("版本：" + this.getVersion()); //获取当前的版本

handler = new Handler(){

@Override

public void handleMessage(Message msg) { //接收消息队列里面的消息

// TODO Auto-generated method stub

switch (msg.what) {

case URL_ERROR:

Toast.makeText(splashactivity.this, "url错误", Toast.LENGTH_LONG).show();

loadMain();

break;

case PROTOCOL_ERROR:

Toast.makeText(splashactivity.this, "请求方式错误", Toast.LENGTH_LONG).show();

loadMain();

break;

case JSON_PARSER_ERROR:

Toast.makeText(splashactivity.this, "JSON解析错误", Toast.LENGTH_LONG).show();

loadMain();

break;

case INTERNET_ERROR:

Toast.makeText(splashactivity.this, "网络链接错误", Toast.LENGTH_LONG).show();

loadMain();

break;

case READ_DATA_ERROR:

Toast.makeText(splashactivity.this, "数据解析错误", Toast.LENGTH_LONG).show();

loadMain();

break;

case LOAD_MAIN:

loadMain();

break;

case SHOW_DIALOG:

showDialog();

break;

case UPDADTE_SOFT:

File file = (File) msg.obj;

installApk(file);

break;

case DOWNLOAD_FILE_FAILURE:

Toast.makeText(splashactivity.this, "文件下载失败", Toast.LENGTH_LONG).show();

loadMain();

break;

}

};

/********************************************************************************************/

//子线程去检查服务器是否有新的版本

this.checkServiceVersion();

}

/**

* ***************此方法是查找此软件的版本是否要更新

private void checkServiceVersion()

{

new Thread() //开一个子线程，因为主线程不要太多的工作，不然会容易阻塞的

{

public void run()

{

//连接互联网

startTime = System.currentTimeMillis();

String path = "http://192.168.128.1:8080/safemobile_server/safemobile_ser"; //访问服务端的地址

Message msg = Message.obtain(); //获得消息对象

try

{

//loadMain();

info = Utils.getServerInfo(path); //通过json解析获得需要的信息

Log.i("splashactivity", "版本号："+ info.getVersion());

if(getVersion().equals(info.getVersion()))

{

msg.what = LOAD_MAIN;

}else

{

msg.what = SHOW_DIALOG;

}

} catch (MalformedURLException e) {

e.printStackTrace();

msg.what=URL_ERROR;

} catch (ProtocolException e) {

e.printStackTrace();

msg.what=PROTOCOL_ERROR;

}catch (JSONException e) {

msg.what=JSON_PARSER_ERROR;

}catch (IOException e) {

e.printStackTrace();

msg.what=INTERNET_ERROR;

}catch (Exception e) {

e.printStackTrace();

msg.what=READ_DATA_ERROR;

}finally

{

long edntime = System.currentTimeMillis();

long data = edntime-startTime;

if(data < 2000)

{

try

{

Thread.sleep(2000 - data);

}catch(Exception e)

{

e.printStackTrace();

}

handler.sendMessage(msg);

}

}.start();

}

/**

* 如果要更新的话就显示一个更新的对话框

public void showDialog()

{

AlertDialog.Builder builder = new Builder(this);

builder.setIcon(R.drawable.ic_launcher);

builder.setTitle("升级提醒");

builder.setMessage(info.getDesc());

builder.setOnCancelListener(new DialogInterface.OnCancelListener() {

@Override

public void onCancel(DialogInterface dialog) {

// TODO Auto-generated method stub

loadMain();

}

});

builder.setNegativeButton("否", new OnClickListener(){

@Override

public void onClick(DialogInterface dialog, int which) {

loadMain();

}

});

builder.setPositiveButton("是", new OnClickListener(){

@Override

public void onClick(DialogInterface dialog, int which) {

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))

{

file = new File(Environment.getExternalStorageDirectory(), info.getPath().substring(info.getPath().lastIndexOf("/")+1));

pd = new ProgressDialog(splashactivity.this);

pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

pd.setIcon(R.drawable.ic_launcher);

pd.setTitle("下载文件");

pd.setMessage("文件正在下载，请稍后...");

pd.show();

new Thread(){

public void run()

{

File newFile = Utils.updateSoft(file, info.getPath(), pd);

if(newFile !=null)

{

installApk(newFile);

}else

{

Log.i("splashactivity-->newfile: ", newFile+"" + info.getPath());

Message msg = Message.obtain();

msg.what = DOWNLOAD_FILE_FAILURE;

handler.sendMessage(msg);

}

}.start();

}else

{

Toast.makeText(splashactivity.this, "sdcard不可用", Toast.LENGTH_LONG).show();

}

});

builder.show();

}

/**

* 跳转主页面的方法

public void loadMain()

{

Intent intent = new Intent(this,MainActivity.class);

startActivity(intent);

// Intent blackNumberintent = new Intent(this, BlackNumberService.class);

// startService(blackNumberintent);

finish();

}

/**

* 安装应用

* @param file

public void installApk(File file)

{

Intent intent = new Intent();

intent.setAction(Intent.ACTION_VIEW);

intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");

startActivity(intent);

this.finish();

}

/**

* 获取当前的版本

public String getVersion()

{

PackageManager packageManager = this.getPackageManager();

try

{

PackageInfo info = packageManager.getPackageInfo(getPackageName(), PackageManager.GET_ACTIVITIES);

String version = info.versionName;

return version;

}catch(Exception e)

{

e.printStackTrace();

return "";

}

如果地址错误或者连不上网的话，就出现这个：

如果连接正确的话就是：

然后就进行下载更新：

完成安装之后就进入到主界面：

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