版本跟新

Manacitity
package com.bawei.lianjie;

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

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

public class MainActivity extends Activity {

private AlertDialog dialog;private UpdateEntity updateEntity;private TextView tv_name;/** * 消息机制 */private Handler handler = new Handler(){    @Override    public void handleMessage(Message msg) {        // TODO Auto-generated method stub        super.handleMessage(msg);        switch (msg.what) {            case 0:                dialog.setMessage(updateEntity.getDescription());                dialog.show();                break;            case 1:                downLoadApk();                break;        }    }};@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    dialog = new AlertDialog.Builder(MainActivity.this).            setTitle("升级提醒").            setIcon(R.drawable.seller_icon).            setPositiveButton("在线升级", onclick).            setNegativeButton("不想升级", null).            create();    //开启线程    new Thread(new CheckVersionTask()).start();}DialogInterface.OnClickListener  onclick = new DialogInterface.OnClickListener(){    @Override    public void onClick(DialogInterface dialog, int which) {        // TODO Auto-generated method stub        handler.sendEmptyMessage(1);    }};/* * 从服务器中下载APK */protected void downLoadApk() {    final ProgressDialog pd;    //进度条对话框    pd = new  ProgressDialog(this);    pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);    pd.setMessage("正在下载更新");    pd.show();    new Thread(){        @Override        public void run() {            try {                File file =  getFileFromServer(updateEntity.getUrl(), pd);                sleep(3000);                UpdateTools tools = new UpdateTools();                //安装APk                tools.installApk(file,MainActivity.this);                pd.dismiss(); //结束掉进度条对话框            } catch (Exception e) {                e.printStackTrace();            }        }}.start();}/* * 从服务器获取xml解析并进行比对版本号 */public class CheckVersionTask implements Runnable{    public void run() {        try {            //从资源文件获取服务器 地址            String path = getResources().getString(R.string.serverurl);            //包装成url的对象            URL url = new URL(path);            HttpURLConnection conn =  (HttpURLConnection) url.openConnection();            conn.setConnectTimeout(5000);            InputStream is =conn.getInputStream();            updateEntity =  UpdateTools.getUpdataInfo(is);            int versionCode = MainActivity.this.getPackageManager().getPackageInfo(MainActivity.this.getPackageName(), 0).versionCode;            if(Integer.parseInt(updateEntity.getVersion()) <= versionCode){                Log.i("xxx","版本号相同无需升级");            }else{                Log.i("xxxx","版本号不同 ,提示用户升级 ");                handler.sendEmptyMessage(0);            }        } catch (Exception e) {            e.printStackTrace();        }    }}/** * 下载方法 * * @param path * @param pd * @return * @throws Exception */public File getFileFromServer(String path, ProgressDialog pd)        throws Exception {    // 如果相等的话表示当前的sdcard挂载在手机上并且是可用的    if (Environment.getExternalStorageState().equals(            Environment.MEDIA_MOUNTED)) {        URL url = new URL(path);        HttpURLConnection conn = (HttpURLConnection) url.openConnection();        conn.setConnectTimeout(5000);        // 获取到文件的大小        pd.setMax(conn.getContentLength());        InputStream is = conn.getInputStream();        File file = new File(Environment.getExternalStorageDirectory(),                "updata.apk");        FileOutputStream fos = new FileOutputStream(file);        BufferedInputStream bis = new BufferedInputStream(is);        byte[] buffer = new byte[1024];        int len;        int total = 0;        while ((len = bis.read(buffer)) != -1) {            fos.write(buffer, 0, len);            total += len;            // 获取当前下载量            pd.setProgress(total);        }        fos.close();        bis.close();        is.close();        return file;    } else {        return null;    }}@Overrideprotected void onPause() {    // TODO Auto-generated method stub    super.onPause();}@Overrideprotected void onResume() {    // TODO Auto-generated method stub    super.onResume();}

}
////////////////////////////
UpdateEntity
package com.bawei.lianjie;
/**
* 版本更新信息的封装
*
* @author dagang
*
*/
public class UpdateEntity {
private String version;

private String url;private String description;public String getVersion() {    return version;}public void setVersion(String version) {    this.version = version;}public String getUrl() {    return url;}public void setUrl(String url) {    this.url = url;}public String getDescription() {    return description;}public void setDescription(String description) {    this.description = description;}

}
/////////////
UpdateTools
package com.bawei.lianjie;

import java.io.File;
import java.io.InputStream;

import org.xmlpull.v1.XmlPullParser;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.util.Xml;

/**
*
* 获取服务器的更新内容
*
* 当前版本
*
* apk的路径
*
* 更新细则
*
* @author dagang
*
*/
public class UpdateTools {
/*
* 用pull解析器解析服务器返回的xml文件 (xml封装了版本号)
*/
public static UpdateEntity getUpdataInfo(InputStream is) throws Exception {
XmlPullParser parser = Xml.newPullParser();
parser.setInput(is, “utf-8”);// 设置解析的数据源
int type = parser.getEventType();
UpdateEntity info = new UpdateEntity();// 实体
while (type != XmlPullParser.END_DOCUMENT) {
switch (type) {
case XmlPullParser.START_TAG:
if (“version”.equals(parser.getName())) {
info.setVersion(parser.nextText()); // 获取版本号
} else if (“url”.equals(parser.getName())) {
info.setUrl(parser.nextText()); // 获取要升级的APK文件
} else if (“description”.equals(parser.getName())) {
info.setDescription(parser.nextText()); // 获取该文件的信息
}
break;
}
type = parser.next();
}
return info;
}

/** * * 安装Apk * * @param file * @param context */public void installApk(File file,Context context) {    Intent intent = new Intent();    //执行动作    intent.setAction(Intent.ACTION_VIEW);    //执行的数据类型    intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");    context.startActivity(intent);}

}
////////////
string

http://169.254.239.220:8080/goods_file/update_file.xml