Android(安卓)apps应用检查更新代码

JAVA代码：

UpdateManager.java

package com.iteye.update;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;import java.util.HashMap;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.app.Dialog;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.content.Intent;import android.content.pm.PackageManager.NameNotFoundException;import android.net.Uri;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.view.LayoutInflater;import android.view.View;import android.widget.ProgressBar;import android.widget.Toast;import com.iteye.androidtoast.R;public class UpdateManager{/* 下载中 */private static final int DOWNLOAD = 1;/* 下载结束 */private static final int DOWNLOAD_FINISH = 2;/* 保存解析的XML信息 */HashMap mHashMap;/* 下载保存路径 */private String mSavePath;/* 记录进度条数量 */private int progress;/* 是否取消更新 */private boolean cancelUpdate = false;private Context mContext;/* 更新进度条 */private ProgressBar mProgress;private Dialog mDownloadDialog;private Handler mHandler = new Handler(){public void handleMessage(Message msg){switch (msg.what){// 正在下载case DOWNLOAD:// 设置进度条位置mProgress.setProgress(progress);break;case DOWNLOAD_FINISH:// 安装文件installApk();break;default:break;}};};public UpdateManager(Context context){this.mContext = context;}/** * 检测软件更新 */public void checkUpdate(){if (isUpdate()){// 显示提示对话框showNoticeDialog();} else{Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();}}/** * 检查软件是否有更新版本 *  * @return */private boolean isUpdate(){// 获取当前软件版本int versionCode = getVersionCode(mContext);// 把version.xml放到网络上，然后获取文件信息//InputStream inStream = ParseXmlService.class.getClassLoader().getResourceAsStream("version.xml");// 解析XML文件。 由于XML文件比较小，因此使用DOM方式进行解析ParseXmlService service = new ParseXmlService();try{String path = "http://192.168.1.146:8080/picweb/xml/version.xml";    URL url = new URL(path);    HttpURLConnection conn = (HttpURLConnection)url.openConnection();    conn.setReadTimeout(5*1000);    conn.setRequestMethod("GET");    InputStream inStream = conn.getInputStream();mHashMap = service.parseXml(inStream);} catch (Exception e){e.printStackTrace();}if (null != mHashMap){int serviceCode = Integer.valueOf(mHashMap.get("version"));// 版本判断if (serviceCode > versionCode){return true;}}return false;}/** * 获取软件版本号 *  * @param context * @return */private int getVersionCode(Context context){int versionCode = 0;try{// 获取软件版本号，对应AndroidManifest.xml下android:versionCodeversionCode = context.getPackageManager().getPackageInfo("com.iteye.androidtoast", 0).versionCode;} catch (NameNotFoundException e){e.printStackTrace();}return versionCode;}/** * 显示软件更新对话框 */private void showNoticeDialog(){// 构造对话框AlertDialog.Builder builder = new Builder(mContext);builder.setTitle(R.string.soft_update_title);builder.setMessage(R.string.soft_update_info);// 更新builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){dialog.dismiss();// 显示下载对话框showDownloadDialog();}});// 稍后更新builder.setNegativeButton(R.string.soft_update_later, new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){dialog.dismiss();}});Dialog noticeDialog = builder.create();noticeDialog.show();}/** * 显示软件下载对话框 */private void showDownloadDialog(){// 构造软件下载对话框AlertDialog.Builder builder = new Builder(mContext);builder.setTitle(R.string.soft_updating);// 给下载对话框增加进度条final LayoutInflater inflater = LayoutInflater.from(mContext);View v = inflater.inflate(R.layout.softupdate_progress, null);mProgress = (ProgressBar) v.findViewById(R.id.update_progress);builder.setView(v);// 取消更新builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){dialog.dismiss();// 设置取消状态cancelUpdate = true;}});mDownloadDialog = builder.create();mDownloadDialog.show();// 现在文件downloadApk();}/** * 下载apk文件 */private void downloadApk(){// 启动新线程下载软件new downloadApkThread().start();}/** * 下载文件线程 */private class downloadApkThread extends Thread{@Overridepublic void run(){try{// 判断SD卡是否存在，并且是否具有读写权限if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){// 获得存储卡的路径String sdpath = Environment.getExternalStorageDirectory() + "/";mSavePath = sdpath + "download";URL url = new URL(mHashMap.get("url"));// 创建连接HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.connect();// 获取文件大小int length = conn.getContentLength();// 创建输入流InputStream is = conn.getInputStream();File file = new File(mSavePath);// 判断文件目录是否存在if (!file.exists()){file.mkdir();}File apkFile = new File(mSavePath, mHashMap.get("name"));FileOutputStream fos = new FileOutputStream(apkFile);int count = 0;// 缓存byte buf[] = new byte[1024];// 写入到文件中do{int numread = is.read(buf);count += numread;// 计算进度条位置progress = (int) (((float) count / length) * 100);// 更新进度mHandler.sendEmptyMessage(DOWNLOAD);if (numread <= 0){// 下载完成mHandler.sendEmptyMessage(DOWNLOAD_FINISH);break;}// 写入文件fos.write(buf, 0, numread);} while (!cancelUpdate);// 点击取消就停止下载.fos.close();is.close();}} catch (MalformedURLException e){e.printStackTrace();} catch (IOException e){e.printStackTrace();}// 取消下载对话框显示mDownloadDialog.dismiss();}};/** * 安装APK文件 */private void installApk(){File apkfile = new File(mSavePath, mHashMap.get("name"));if (!apkfile.exists()){return;}// 通过Intent安装APK文件Intent i = new Intent(Intent.ACTION_VIEW);i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");mContext.startActivity(i);}}

ParseXmlService.java

package com.iteye.update;import java.io.InputStream;import java.util.HashMap;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.Node;import org.w3c.dom.NodeList;public class ParseXmlService{public HashMap parseXml(InputStream inStream) throws Exception{HashMap hashMap = new HashMap();// 实例化一个文档构建器工厂DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();// 通过文档构建器工厂获取一个文档构建器DocumentBuilder builder = factory.newDocumentBuilder();// 通过文档通过文档构建器构建一个文档实例Document document = builder.parse(inStream);//获取XML文件根节点Element root = document.getDocumentElement();//获得所有子节点NodeList childNodes = root.getChildNodes();for (int j = 0; j < childNodes.getLength(); j++){//遍历子节点Node childNode = (Node) childNodes.item(j);if (childNode.getNodeType() == Node.ELEMENT_NODE){Element childElement = (Element) childNode;//版本号if ("version".equals(childElement.getNodeName())){hashMap.put("version",childElement.getFirstChild().getNodeValue());}//软件名称else if (("name".equals(childElement.getNodeName()))){hashMap.put("name",childElement.getFirstChild().getNodeValue());}//下载地址else if (("url".equals(childElement.getNodeName()))){hashMap.put("url",childElement.getFirstChild().getNodeValue());}}}return hashMap;}}

version.xml

<?xml version="1.0" encoding="UTF-8"?>1baidu_xinwen_1.1.0http://gdown.baidu.com/data/wisegame/f98d235e39e29031/baiduxinwen.apk

测试代码：

UpdateManager manager = new UpdateManager(MainTwoActivity.this);// 检查软件更新manager.checkUpdate();

注：只需要把version.xml放到网上服务器去，更新版本时，到服务器把版本号和url修改一下就可以。

参考代码下载：

http://download.csdn.net/detail/coolszy/4262247

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