Android开发应用异步检查更新代码

开发环境：android studio sdk 4.0及以上

场景：用户点击检查更新按钮进行检查服务器版本号，若有新版本则进行下载更新。异步检测版本号

  1 package com.example.qurenwu.qurenwu_2.util;  2   3 import java.io.File;  4 import java.io.FileOutputStream;  5 import java.io.IOException;  6 import java.io.InputStream;  7 import java.net.HttpURLConnection;  8 import java.net.MalformedURLException;  9 import java.net.URL; 10 import java.util.HashMap; 11 import java.util.Map; 12  13 import android.app.AlertDialog; 14 import android.app.AlertDialog.Builder; 15 import android.app.Dialog; 16 import android.content.Context; 17 import android.content.DialogInterface; 18 import android.content.DialogInterface.OnClickListener; 19 import android.content.Intent; 20 import android.content.pm.PackageManager; 21 import android.content.pm.PackageManager.NameNotFoundException; 22 import android.net.Uri; 23 import android.os.Environment; 24 import android.os.Handler; 25 import android.os.Message; 26 import android.util.Log; 27 import android.view.LayoutInflater; 28 import android.view.View; 29 import android.widget.ProgressBar; 30 import android.widget.Toast; 31  32 import com.example.qurenwu.qurenwu_2.R; 33 import com.example.qurenwu.qurenwu_2.custom.GotaskGlobalVal; 34  35 import org.w3c.dom.Document; 36 import org.w3c.dom.Element; 37 import org.w3c.dom.Node; 38 import org.w3c.dom.NodeList; 39  40 import javax.xml.parsers.DocumentBuilder; 41 import javax.xml.parsers.DocumentBuilderFactory; 42  43 /** 44  * Created by Administrator on 2014/12/3. 45  */ 46 public class UpdateManager { 47     GotaskGlobalVal globalVal;  //全局 48     /* 下载中 */ 49     private static final int DOWNLOAD = 1; 50     /* 下载结束 */ 51     private static final int DOWNLOAD_FINISH = 2; 52     /*检查是否有更新*/ 53     private static final int CHECK_APK_VERSION= 3; 54     /* 保存解析的XML信息 */ 55     HashMap<String, String> mHashMap; 56     /* 下载保存路径 */ 57     private String mSavePath; 58     /* 记录进度条数量 */ 59     private int progress; 60     /* 是否取消更新 */ 61     private boolean cancelUpdate = false; 62  63     private Context mContext; 64  65     private int mFlag; // 0:自启动检测  1：手动检测，区别在于前者若无更新则不提示，后者若无更新需要提示 66     /* 更新进度条 */ 67     private ProgressBar mProgress; 68     private Dialog mDownloadDialog; 69  70     private Handler mHandler = new Handler() 71     { 72         public void handleMessage(Message msg) 73         { 74             switch (msg.what) 75             { 76                 // 正在下载 77                 case DOWNLOAD: 78                     // 设置进度条位置 79                     mProgress.setProgress(progress); 80                     break; 81                 case DOWNLOAD_FINISH: 82                     // 安装文件 83                     installApk(); 84                     break; 85                 case CHECK_APK_VERSION:  //检查版本更新 86                     mHashMap = (HashMap<String,String>)msg.obj; 87                     // 获取当前软件版本 88                     int versionCode = getVersionCode(mContext); 89                     if (null != mHashMap) 90                     { 91                         int serviceCode = Integer.valueOf(mHashMap.get("version")); 92                         // 版本判断 93                         Log.v("isUpdate","serviceCode:"+serviceCode+";versionCode:"+versionCode); 94                         if (serviceCode > versionCode) 95                         { 96                             //需要更新 97                             showNoticeDialog(); 98                         } 99                         else100                         {101                             if(mFlag == 1)102                             {Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();}103                         }104                     }105                     break;106                 default:107                     break;108             }109         };110     };111 112     public UpdateManager(Context context)113     {114         this.mContext = context;115         globalVal = (GotaskGlobalVal)context.getApplicationContext();116         mFlag = 0;117     }118 119     /**120      * 检测软件更新121      * @param flag 0:启动时检测  1：手动检测，区别在于前者若无更新则不提示，后者若无更新需要提示122      */123     public void checkUpdate(int flag)124     {125         mFlag = flag;126         CheckVersionHttpThread checkthread = new CheckVersionHttpThread(mHandler,CHECK_APK_VERSION);127         new Thread(checkthread).start();128     }129     /**130      * 检查软件是否有更新版本131      *132      * @return133      */134     private boolean isUpdate()135     {136         // 获取当前软件版本137         int versionCode = getVersionCode(mContext);138         // 把version.xml放到网络上，然后获取文件信息139         //InputStream inStream = ParseXmlService.class.getClassLoader().getResourceAsStream("version.xml");140         // 解析XML文件。 由于XML文件比较小，因此使用DOM方式进行解析141         ParseXmlService service = new ParseXmlService();142         try143         {144             //String path = "http://192.168.1.146:8080/picweb/xml/version.xml";145             String path = globalVal.BASE_URL+"/xml/version.xml";146             URL url = new URL(path);147             HttpURLConnection conn = (HttpURLConnection)url.openConnection();148             conn.setReadTimeout(5*1000);149             conn.setRequestMethod("GET");150             InputStream inStream = conn.getInputStream();151             mHashMap = service.parseXml(inStream);152         } catch (Exception e)153         {154             e.printStackTrace();155         }156         if (null != mHashMap)157         {158             int serviceCode = Integer.valueOf(mHashMap.get("version"));159             // 版本判断160             Log.v("isUpdate","serviceCode:"+serviceCode+";versionCode:"+versionCode);161             if (serviceCode > versionCode)162             {163                 return true;164             }165         }166         return false;167     }168 169     /**170      * 获取软件版本号171      *172      * @param context173      * @return174      */175     private int getVersionCode(Context context)176     {177         int versionCode = 0;178         try179         {180             // 获取软件版本号，对应AndroidManifest.xml下android:versionCode181             versionCode = context.getPackageManager().getPackageInfo("com.example.qurenwu.qurenwu_2", 0).versionCode;182         } catch (PackageManager.NameNotFoundException e)183         {184             e.printStackTrace();185         }186         return versionCode;187     }188 189     /**190      * 显示软件更新对话框191      */192     private void showNoticeDialog()193     {194         // 构造对话框195         AlertDialog.Builder builder = new Builder(mContext);196         builder.setTitle(R.string.soft_update_title);197         builder.setMessage(R.string.soft_update_info);198         // 更新199         builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener()200         {201             @Override202             public void onClick(DialogInterface dialog, int which)203             {204                 dialog.dismiss();205                 // 显示下载对话框206                 showDownloadDialog();207             }208         });209         // 稍后更新210         builder.setNegativeButton(R.string.soft_update_later, new OnClickListener()211         {212             @Override213             public void onClick(DialogInterface dialog, int which)214             {215                 dialog.dismiss();216             }217         });218         Dialog noticeDialog = builder.create();219         noticeDialog.show();220     }221 222     /**223      * 显示软件下载对话框224      */225     private void showDownloadDialog()226     {227         // 构造软件下载对话框228         AlertDialog.Builder builder = new Builder(mContext);229         builder.setTitle(R.string.soft_updating);230         // 给下载对话框增加进度条231         final LayoutInflater inflater = LayoutInflater.from(mContext);232         View v = inflater.inflate(R.layout.softupdate_progress, null);233         mProgress = (ProgressBar) v.findViewById(R.id.update_progress);234         builder.setView(v);235         // 取消更新236         builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener()237         {238             @Override239             public void onClick(DialogInterface dialog, int which)240             {241                 dialog.dismiss();242                 // 设置取消状态243                 cancelUpdate = true;244             }245         });246         mDownloadDialog = builder.create();247         mDownloadDialog.show();248         // 现在文件249         downloadApk();250     }251 252     /**253      * 下载apk文件254      */255     private void downloadApk()256     {257         // 启动新线程下载软件258         new downloadApkThread().start();259     }260 261     /**262      * 下载文件线程263      */264     private class downloadApkThread extends Thread265     {266         @Override267         public void run()268         {269             try270             {271                 // 判断SD卡是否存在，并且是否具有读写权限272                 if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))273                 {274                     // 获得存储卡的路径275                     String sdpath = Environment.getExternalStorageDirectory() + "/";276                     mSavePath = sdpath + "download";277                     URL url = new URL(mHashMap.get("url"));278                     // 创建连接279                     HttpURLConnection conn = (HttpURLConnection) url.openConnection();280                     conn.connect();281                     // 获取文件大小282                     int length = conn.getContentLength();283                     // 创建输入流284                     InputStream is = conn.getInputStream();285 286                     File file = new File(mSavePath);287                     // 判断文件目录是否存在288                     if (!file.exists())289                     {290                         file.mkdir();291                     }292                     File apkFile = new File(mSavePath, mHashMap.get("name"));293                     FileOutputStream fos = new FileOutputStream(apkFile);294                     int count = 0;295                     // 缓存296                     byte buf[] = new byte[1024];297                     // 写入到文件中298                     do299                     {300                         int numread = is.read(buf);301                         count += numread;302                         // 计算进度条位置303                         progress = (int) (((float) count / length) * 100);304                         // 更新进度305                         mHandler.sendEmptyMessage(DOWNLOAD);306                         if (numread <= 0)307                         {308                             // 下载完成309                             mHandler.sendEmptyMessage(DOWNLOAD_FINISH);310                             break;311                         }312                         // 写入文件313                         fos.write(buf, 0, numread);314                     } while (!cancelUpdate);// 点击取消就停止下载.315                     fos.close();316                     is.close();317                 }318             } catch (MalformedURLException e)319             {320                 e.printStackTrace();321             } catch (IOException e)322             {323                 e.printStackTrace();324             }325             // 取消下载对话框显示326             mDownloadDialog.dismiss();327         }328     };329 330     /**331      * 安装APK文件332      */333     private void installApk()334     {335         File apkfile = new File(mSavePath, mHashMap.get("name"));336         if (!apkfile.exists())337         {338             return;339         }340         // 通过Intent安装APK文件341         Intent i = new Intent(Intent.ACTION_VIEW);342         i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");343         mContext.startActivity(i);344     }345     class ParseXmlService346     {347         public HashMap<String, String> parseXml(InputStream inStream) throws Exception348         {349             HashMap<String, String> hashMap = new HashMap<String, String>();350 351             // 实例化一个文档构建器工厂352             DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();353             // 通过文档构建器工厂获取一个文档构建器354             DocumentBuilder builder = factory.newDocumentBuilder();355             // 通过文档通过文档构建器构建一个文档实例356             Document document = builder.parse(inStream);357             //获取XML文件根节点358             Element root = document.getDocumentElement();359             //获得所有子节点360             NodeList childNodes = root.getChildNodes();361             for (int j = 0; j < childNodes.getLength(); j++)362             {363                 //遍历子节点364                 Node childNode = (Node) childNodes.item(j);365                 if (childNode.getNodeType() == Node.ELEMENT_NODE)366                 {367                     Element childElement = (Element) childNode;368                     //版本号369                     if ("version".equals(childElement.getNodeName()))370                     {371                         hashMap.put("version",childElement.getFirstChild().getNodeValue());372                     }373                     //软件名称374                     else if (("name".equals(childElement.getNodeName())))375                     {376                         hashMap.put("name",childElement.getFirstChild().getNodeValue());377                     }378                     //下载地址379                     else if (("url".equals(childElement.getNodeName())))380                     {381                         hashMap.put("url",childElement.getFirstChild().getNodeValue());382                     }383                 }384             }385             return hashMap;386         }387     }388     /**389      * 检测线程390      */391     class CheckVersionHttpThread implements Runnable{392         private Handler handler;393         int requestCode;394         /**395          * @param _handler396          * @param _requestCode  若一个activity有多个此请求，那么activity中的handle的msg .what也不同，用该字段区分397          */398         public CheckVersionHttpThread(Handler _handler,int _requestCode)399         {400             this.handler = _handler;401             this.requestCode = _requestCode;402         }403         @Override404         public void run() {405             HashMap<String, String> result= null;406             // 把version.xml放到网络上，然后获取文件信息407             //InputStream inStream = ParseXmlService.class.getClassLoader().getResourceAsStream("version.xml");408             // 解析XML文件。 由于XML文件比较小，因此使用DOM方式进行解析409             ParseXmlService service = new ParseXmlService();410             try411             {412                 //String path = "http://192.168.1.146:8080/picweb/xml/version.xml";413                 String path = globalVal.BASE_URL+"/xml/version.xml";414                 URL url = new URL(path);415                 HttpURLConnection conn = (HttpURLConnection)url.openConnection();416                 conn.setReadTimeout(5*1000);417                 conn.setRequestMethod("GET");418                 InputStream inStream = conn.getInputStream();419                 result = service.parseXml(inStream);420             } catch (Exception e)421             {422                 e.printStackTrace();423             }424             Message msg = new Message();425             msg.what = requestCode;426             msg.obj = result;427             handler.sendMessage(msg);428         }429     }430 }

主界面中调用：

//检测新版本        UpdateManager manager = new UpdateManager(MyActivity.this);// 检查软件更新        manager.checkUpdate(0); //0:表示启动时检测 1：手动检测，区别在于前者若无更新则不提示，后者若无更新需要提示

mainfest.xml 中需要配置版本号

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.qurenwu.qurenwu_2"    android:versionCode="1"    android:versionName="1.0" >

string.xml需要增加字符串

    <string name="soft_update_no">已经是最新版本</string>    <string name="soft_update_title">软件更新</string>    <string name="soft_update_info">检测到新版本，立即更新吗</string>    <string name="soft_update_updatebtn">更新</string>    <string name="soft_update_later">稍后更新</string>    <string name="soft_updating">正在更新</string>    <string name="soft_update_cancel">取消</string>

服务器端需要在目录如：http://192.168.11.1/xml/ 目录下增加文件 version.xml 内容如下：

<?xml version="1.0" encoding="UTF-8"?>  <update>      <version>1</version>  <!-- 必须是整数 -->    <name>gotask.1.0</name>      <url>http://192.168.11.6/download/gotask.apk</url>  </update>

ok！大功告成！

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