Android:自动检测软件升级

步骤:

1.检测当前版本的信息AndroidManifest.xml-->manifest-->android:versionName。

2.从服务器获取版本号(版本号存在于xml文件中)并与当前检测到的版本进行匹配,如果不匹配,提示用户进行升级,如果匹配则进入程序主界面。

  3.当提示用户进行版本升级时,如果用户点击了确定,系统将自动从服务器上下载并进行自动升级,如果点击取消将进入程序主界面。

  效果图:

  获取当前程序的版本号:

  

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   /* 
   * 获取当前程序的版本号 
   */ 
   private String getVersionName() throws Exception{ 
   //获取packagemanager的实例 
   PackageManager packageManager = getPackageManager(); 
   //getPackageName()是你当前类的包名,0代表是获取版本信息 
   PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0); 
   return packInfo.versionName; 
   } 
   /* 
   * 获取当前程序的版本号 
   */ 
   private String getVersionName() throws Exception{ 
   //获取packagemanager的实例 
   PackageManager packageManager = getPackageManager(); 
   //getPackageName()是你当前类的包名,0代表是获取版本信息 
   PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0); 
   return packInfo.versionName; 
   }获取服务器端的版本号: 
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   /* 
   * 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 UpdataInfo 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(); 
   UpdataInfo info = new UpdataInfo();//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; 
   } 
   /* 
   * 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 UpdataInfo 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(); 
   UpdataInfo info = new UpdataInfo();//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; 
   }从服务器下载apk: 
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   public static 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; 
   } 
   } 
   public static 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; 
   } 
   } 
   匹配、下载、自动安装: 
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   /* 
   * 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(); 
   info = UpdataInfoParser.getUpdataInfo(is); 
   if(info.getVersion().equals(versionname)){ 
   Log.i(TAG,"版本号相同无需升级"); 
   LoginMain(); 
   }else{ 
   Log.i(TAG,"版本号不同 ,提示用户升级 "); 
   Message msg = new Message(); 
   msg.what = UPDATA_CLIENT; 
   handler.sendMessage(msg); 
   } 
   } catch (Exception e) { 
   // 待处理 
   Message msg = new Message(); 
   msg.what = GET_UNDATAINFO_ERROR; 
   handler.sendMessage(msg); 
   e.printStackTrace(); 
   } 
   } 
   } 
   Handler handler = new Handler(){ 
   @Override 
   public void handleMessage(Message msg) { 
   // TODO Auto-generated method stub 
   super.handleMessage(msg); 
   switch (msg.what) { 
   case UPDATA_CLIENT: 
   //对话框通知用户升级程序 
   showUpdataDialog(); 
   break; 
   case GET_UNDATAINFO_ERROR: 
   //服务器超时 
   Toast.makeText(getApplicationContext(), "获取服务器更新信息失败", 1).show(); 
   LoginMain(); 
   break; 
   case DOWN_ERROR: 
   //下载apk失败 
   Toast.makeText(getApplicationContext(), "下载新版本失败", 1).show(); 
   LoginMain(); 
   break; 
   } 
   } 
   }; 
   /* 
   * 
   * 弹出对话框通知用户更新程序 
   * 
   * 弹出对话框的步骤: 
   * 1.创建alertDialog的builder. 
   * 2.要给builder设置属性, 对话框的内容,样式,按钮 
   * 3.通过builder 创建一个对话框 
   * 4.对话框show()出来 
   */ 
   protected void showUpdataDialog() { 
   AlertDialog.Builder builer = new Builder(this) ; 
   builer.setTitle("版本升级"); 
   builer.setMessage(info.getDescription()); 
   //当点确定按钮时从服务器上下载 新的apk 然后安装 
   builer.setPositiveButton("确定", new OnClickListener() { 
   public void onClick(DialogInterface dialog, int which) { 
   Log.i(TAG,"下载apk,更新"); 
   downLoadApk(); 
   } 
   }); 
   //当点取消按钮时进行登录 
   builer.setNegativeButton("取消", new OnClickListener() { 
   public void onClick(DialogInterface dialog, int which) { 
   // TODO Auto-generated method stub 
   LoginMain(); 
   } 
   }); 
   AlertDialog dialog = builer.create(); 
   dialog.show(); 
   } 
   /* 
   * 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 = DownLoadManager.getFileFromServer(info.getUrl(), pd); 
   sleep(3000); 
   installApk(file); 
   pd.dismiss(); //结束掉进度条对话框 
   } catch (Exception e) { 
   Message msg = new Message(); 
   msg.what = DOWN_ERROR; 
   handler.sendMessage(msg); 
   e.printStackTrace(); 
   } 
   }}.start(); 
   } 
   //安装apk 
   protected void installApk(File file) { 
   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"); 
   startActivity(intent); 
   } 
   /* 
   * 进入程序的主界面 
   */ 
   private void LoginMain(){ 
   Intent intent = new Intent(this,MainActivity.class); 
   startActivity(intent); 
   //结束掉当前的activity 
   this.finish(); 
   }

 

posted @ 2012-05-28 20:53  坏混混  阅读(817)  评论(0编辑  收藏  举报