android app 版本升级

android应用实现自动检测版本升级 在我们APP的开发中，往往都会遇到版本的升级，因为不可能有任何一个应用做的完美无缺，所以版本升级对APP应用来说是不可缺少的一部分.像新浪微博等一些应用软件，三天两头提醒我升级.不过这样也很正常，就像android 升级一样，为了给用户提供更方便更人性化的操作.说下具体实现吧，不过我是参考别人的。不管对你们有没有帮助，总之对我有帮助啊，如果日后用到就直接copy了.哈哈，不扯了。     首先看一个文件manifest文件： view source print ? 1 <MANIFEST android:versionname="1.0" android:versioncode="1" package="com.jj.upgrade" xmlns:android="http://schemas.android.com/apk/res/android">  </MANIFEST> 我们可以很清楚的看到versionCode和versionName,我们一般用versionCode来实现, 实现原理很简单：服务器端有个serverVersion，我们本地有个localVersion.服务器端serverVersion>localVersion,这个时候我们就需要进行升级版本.原理大致就是这样。 具体实现请看下面: view source print ? 01 package com.jj.upgrade;  02     03 import com.jj.Service.UpdateService;  04     05 import android.app.AlertDialog;  06 import android.app.Application;  07 import android.content.DialogInterface;  08 import android.content.Intent;  09 import android.content.pm.PackageInfo;  10 import android.content.pm.PackageManager.NameNotFoundException;  11     12 /*** 13  * MyApplication 14  *  15  * @author zhangjia 16  *  17  */  18 public class MyApplication extends Application {  19     20     public static int localVersion = 0;// 本地安装版本  21     22     public static int serverVersion = 2;// 服务器版本  23     24     public static String downloadDir = "jj/";// 安装目录  25     26     @Override  27     public void onCreate() {  28         super.onCreate();  29         try {  30             PackageInfo packageInfo = getApplicationContext()  31                     .getPackageManager().getPackageInfo(getPackageName(), 0);  32             localVersion = packageInfo.versionCode;  33         } catch (NameNotFoundException e) {  34             e.printStackTrace();  35         }  36     37         /*** 38          * 在这里写一个方法用于请求获取服务器端的serverVersion. 39          */  40     41     }  42     43 } 我们一般把全局的东西放到application里面. view source print ? 01 public class MainActivity extends Activity {  02     private MyApplication myApplication;  03     04     @Override  05     public void onCreate(Bundle savedInstanceState) {  06         super.onCreate(savedInstanceState);  07         setContentView(R.layout.main);  08             09         checkVersion();  10     }  11     12     /*** 13      * 检查是否更新版本 14      */  15     public void checkVersion() {  16         myApplication = (MyApplication) getApplication();  17         if (myApplication.localVersion < myApplication.serverVersion) {  18     19             // 发现新版本，提示用户更新  20             AlertDialog.Builder alert = new AlertDialog.Builder(this);  21             alert.setTitle("软件升级")  22                     .setMessage("发现新版本,建议立即更新使用.")  23                     .setPositiveButton("更新",  24                             new DialogInterface.OnClickListener() {  25                                 public void onClick(DialogInterface dialog,  26                                         int which) {  27                                     Intent updateIntent = new Intent(  28                                             MainActivity.this,  29                                             UpdateService.class);  30                                     updateIntent.putExtra(  31                                             "app_name",  32                                             getResources().getString(  33                                                     R.string.app_name));  34                                     startService(updateIntent);  35                                 }  36                             })  37                     .setNegativeButton("取消",  38                             new DialogInterface.OnClickListener() {  39                                 public void onClick(DialogInterface dialog,  40                                         int which) {  41                                     dialog.dismiss();  42                                 }  43                             });  44             alert.create().show();  45     46         }  47     }  48 } 我们在运行应用的时候要checkVersion();进行检查版本是否要进行升级. 最主要的是UpdateService服务类 view source print ? 01 @Override  02     public int onStartCommand(Intent intent, int flags, int startId) {  03     04         app_name = intent.getStringExtra("app_name");  05         // 创建文件  06         FileUtil.createFile(app_name);// 创建文件  07     08         createNotification();// 首次创建  09     10         createThread();// 线程下载  11     12         return super.onStartCommand(intent, flags, startId);  13     14     } 创建路径及文件，这里就不介绍了，不明白了下载源码看。 首先我们先 看createNotification().这个方法： view source print ? 01 /*** 02      * 创建通知栏 03      */  04     RemoteViews contentView;  05     public void createNotification() {  06         notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);  07         notification = new Notification();  08         notification.icon = R.drawable.ic_launcher;// 这个图标必须要设置，不然下面那个RemoteViews不起作用.  09         // 这个参数是通知提示闪出来的值.  10         notification.tickerText = "开始下载";  11         //  12         // updateIntent = new Intent(this, MainActivity.class);  13         // pendingIntent = PendingIntent.getActivity(this, 0, updateIntent, 0);  14         //  15         // // 这里面的参数是通知栏view显示的内容  16         // notification.setLatestEventInfo(this, app_name, "下载：0%",  17         // pendingIntent);  18         //  19         // notificationManager.notify(notification_id, notification);  20     21         /*** 22          * 在这里我们用自定的view来显示Notification 23          */  24         contentView = new RemoteViews(getPackageName(),  25                 R.layout.notification_item);  26         contentView.setTextViewText(R.id.notificationTitle, "正在下载");  27         contentView.setTextViewText(R.id.notificationPercent, "0%");  28         contentView.setProgressBar(R.id.notificationProgress, 100, 0, false);  29     30         notification.contentView = contentView;  31     32         updateIntent = new Intent(this, MainActivity.class);  33         updateIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);  34         pendingIntent = PendingIntent.getActivity(this, 0, updateIntent, 0);  35     36         notification.contentIntent = pendingIntent;  37     38         notificationManager.notify(notification_id, notification);  39     40     } 上面实现的也不难理解.(主要是初始化Notification,用于提醒用户开始下载)接着我们要看createThread方法 view source print ? 01 /*** 02      * 开线程下载 03      */  04     public void createThread() {  05         /*** 06          * 更新UI 07          */  08         final Handler handler = new Handler() {  09             @Override  10             public void handleMessage(Message msg) {  11                 switch (msg.what) {  12                 case DOWN_OK:  13                     // 下载完成，点击安装  14                     Uri uri = Uri.fromFile(FileUtil.updateFile);  15                     Intent intent = new Intent(Intent.ACTION_VIEW);  16                     intent.setDataAndType(uri,  17                             "application/vnd.android.package-archive");  18     19                     pendingIntent = PendingIntent.getActivity(  20                             UpdateService.this, 0, intent, 0);  21     22                     notification.setLatestEventInfo(UpdateService.this,  23                             app_name, "下载成功，点击安装", pendingIntent);  24     25                     notificationManager.notify(notification_id, notification);  26     27                     stopSelf();  28                     break;  29                 case DOWN_ERROR:  30                     notification.setLatestEventInfo(UpdateService.this,  31                             app_name, "下载失败", pendingIntent);  32                     break;  33     34                 default:  35                     stopSelf();  36                     break;  37                 }  38     39             }  40     41         };  42     43         final Message message = new Message();  44     45         new Thread(new Runnable() {  46             @Override  47             public void run() {  48     49                 try {  50                     long downloadSize = downloadUpdateFile(down_url,  51                             FileUtil.updateFile.toString());  52                     if (downloadSize > 0) {  53                         // 下载成功  54                         message.what = DOWN_OK;  55                         handler.sendMessage(message);  56                     }  57     58                 } catch (Exception e) {  59                     e.printStackTrace();  60                     message.what = DOWN_ERROR;  61                     handler.sendMessage(message);  62                 }  63     64             }  65         }).start();  66     } 这个方法有点小多，不过我想大家都看的明白，我在这里简单说名一下：首先我们创建一个handler用于检测最后下载ok还是not ok. 下面我们开启了线程进行下载数据。 我们接着看downloadUpdateFile这个方法： view source print ? 01 /*** 02      * 下载文件 03      *  04      * @return 05      * @throws MalformedURLException 06      */  07     public long downloadUpdateFile(String down_url, String file)  08             throws Exception {  09         int down_step = 5;// 提示step  10         int totalSize;// 文件总大小  11         int downloadCount = 0;// 已经下载好的大小  12         int updateCount = 0;// 已经上传的文件大小  13         InputStream inputStream;  14         OutputStream outputStream;  15     16         URL url = new URL(down_url);  17         HttpURLConnection httpURLConnection = (HttpURLConnection) url  18                 .openConnection();  19         httpURLConnection.setConnectTimeout(TIMEOUT);  20         httpURLConnection.setReadTimeout(TIMEOUT);  21         // 获取下载文件的size  22         totalSize = httpURLConnection.getContentLength();  23         if (httpURLConnection.getResponseCode() == 404) {  24             throw new Exception("fail!");  25         }  26         inputStream = httpURLConnection.getInputStream();  27         outputStream = new FileOutputStream(file, false);// 文件存在则覆盖掉  28         byte buffer[] = new byte[1024];  29         int readsize = 0;  30         while ((readsize = inputStream.read(buffer)) != -1) {  31             outputStream.write(buffer, 0, readsize);  32             downloadCount += readsize;// 时时获取下载到的大小  33             /** 34              * 每次增张5% 35              */  36             if (updateCount == 0  37                     || (downloadCount * 100 / totalSize - down_step) >= updateCount) {  38                 updateCount += down_step;  39                 // 改变通知栏  40                 // notification.setLatestEventInfo(this, "正在下载...", updateCount  41                 // + "%" + "", pendingIntent);  42                 contentView.setTextViewText(R.id.notificationPercent,  43                         updateCount + "%");  44                 contentView.setProgressBar(R.id.notificationProgress, 100,  45                         updateCount, false);  46                 // show_view  47                 notificationManager.notify(notification_id, notification);  48     49             }  50     51         }  52         if (httpURLConnection != null) {  53             httpURLConnection.disconnect();  54         }  55         inputStream.close();  56         outputStream.close();  57     58         return downloadCount;  59     60     } 注释已经写的很详细，相信大家都看的明白，如果哪里有不足的地方，请留您吉言指出。 这里我用别的app代替了，简单省事，正常的话，你要对你的APP进行数字签名。然后才可以进行升级应用。 示意图： 提示有新版 开始升级 升级下载中   下载完毕，点击安装