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

 package com.example.qurenwu.qurenwu_2.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;
 import java.util.HashMap;
 import java.util.Map;

 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;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.net.Uri;
 import android.os.Environment;
 import android.os.Handler;
 import android.os.Message;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.ProgressBar;
 import android.widget.Toast;

 import com.example.qurenwu.qurenwu_2.R;
 import com.example.qurenwu.qurenwu_2.custom.GotaskGlobalVal;

 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;

 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;

 /**
  * Created by Administrator on 2014/12/3.
  */
 public class UpdateManager {
     GotaskGlobalVal globalVal;  //全局
     /* 下载中 */
     private static final int DOWNLOAD = 1;
     /* 下载结束 */
     private static final int DOWNLOAD_FINISH = 2;
     /*检查是否有更新*/
     private static final int CHECK_APK_VERSION= 3;
     /* 保存解析的XML信息 */
     HashMap<String, String> 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;

     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
     /* 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;
                 case CHECK_APK_VERSION:  //检查版本更新
                     mHashMap = (HashMap<String,String>)msg.obj;
                     // 获取当前软件版本
                     int versionCode = getVersionCode(mContext);
                     if (null != mHashMap)
                     {
                         int serviceCode = Integer.valueOf(mHashMap.get("version"));
                         // 版本判断
                         Log.v("isUpdate","serviceCode:"+serviceCode+";versionCode:"+versionCode);
                         if (serviceCode > versionCode)
                         {
                             //需要更新
                             showNoticeDialog();
                         }
                         else
                         {
                             if(mFlag == 1)
                             {Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();}
                         }
                     }
                     break;
                 default:
                     break;
             }
         };
     };

     public UpdateManager(Context context)
     {
         this.mContext = context;
         globalVal = (GotaskGlobalVal)context.getApplicationContext();
         mFlag = 0;
     }

     /**
      * 检测软件更新
      * @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
      */
     public void checkUpdate(int flag)
     {
         mFlag = flag;
         CheckVersionHttpThread checkthread = new CheckVersionHttpThread(mHandler,CHECK_APK_VERSION);
         new Thread(checkthread).start();
     }
     /**
      * 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";
             String path = globalVal.BASE_URL+"/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
             Log.v("isUpdate","serviceCode:"+serviceCode+";versionCode:"+versionCode);
             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:versionCode
             versionCode = context.getPackageManager().getPackageInfo("com.example.qurenwu.qurenwu_2", 0).versionCode;
         } catch (PackageManager.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()
         {
             @Override
             public 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()
         {
             @Override
             public 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()
         {
             @Override
             public 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
     {
         @Override
         public 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);
     }
     class ParseXmlService
     {
         public HashMap<String, String> parseXml(InputStream inStream) throws Exception
         {
             HashMap<String, String> hashMap = new HashMap<String, String>();

             // 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;
         }
     }
     /**
      * 检测线程
      */
     class CheckVersionHttpThread implements Runnable{
         private Handler handler;
         int requestCode;
         /**
          * @param _handler
          * @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
          */
         public CheckVersionHttpThread(Handler _handler,int _requestCode)
         {
             this.handler = _handler;
             this.requestCode = _requestCode;
         }
         @Override
         public void run() {
             HashMap<String, String> result= null;
             // 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";
                 String path = globalVal.BASE_URL+"/xml/version.xml";
                 URL url = new URL(path);
                 HttpURLConnection conn = (HttpURLConnection)url.openConnection();
                 conn.setReadTimeout(5*1000);
                 conn.setRequestMethod("GET");
                 InputStream inStream = conn.getInputStream();
                 result = service.parseXml(inStream);
             } catch (Exception e)
             {
                 e.printStackTrace();
             }
             Message msg = new Message();
             msg.what = requestCode;
             msg.obj = result;
             handler.sendMessage(msg);
         }
     }
 }

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！