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android 自动检测版本升级
阅读量:4104 次
发布时间:2019-05-25

本文共 13722 字,大约阅读时间需要 45 分钟。

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.

[java]
  1. <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  2.     package="com.jj.upgrade" 
  3.     android:versionCode="1" 
  4.     android:versionName="1.0"
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.

[java]
  1. package com.jj.upgrade; 
  2.  
  3. import com.jj.Service.UpdateService; 
  4.  
  5. import android.app.AlertDialog; 
  6. import android.app.Application; 
  7. import android.content.DialogInterface; 
  8. import android.content.Intent; 
  9. 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.  
package com.jj.upgrade;import com.jj.Service.UpdateService;import android.app.AlertDialog;import android.app.Application;import android.content.DialogInterface;import android.content.Intent;import android.content.pm.PackageInfo;import android.content.pm.PackageManager.NameNotFoundException;/*** * MyApplication *  * @author zhangjia *  */public class MyApplication extends Application {	public static int localVersion = 0;// 本地安装版本	public static int serverVersion = 2;// 服务器版本	public static String downloadDir = "jj/";// 安装目录	@Override	public void onCreate() {		super.onCreate();		try {			PackageInfo packageInfo = getApplicationContext()					.getPackageManager().getPackageInfo(getPackageName(), 0);			localVersion = packageInfo.versionCode;		} catch (NameNotFoundException e) {			e.printStackTrace();		}		/***		 * 在这里写一个方法用于请求获取服务器端的serverVersion.		 */	}}

我们一般把全局的东西放到application里面.

[java]
  1. public class MainActivity extends Activity { 
  2.     private MyApplication myApplication; 
  3.  
  4.     @Override 
  5.     public void onCreate(Bundle savedInstanceState) { 
  6.         super.onCreate(savedInstanceState); 
  7.         setContentView(R.layout.main); 
  8.          
  9.         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.     } 
public class MainActivity extends Activity {	private MyApplication myApplication;	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);				checkVersion();	}	/***	 * 检查是否更新版本	 */	public void checkVersion() {		myApplication = (MyApplication) getApplication();		if (myApplication.localVersion < myApplication.serverVersion) {			// 发现新版本,提示用户更新			AlertDialog.Builder alert = new AlertDialog.Builder(this);			alert.setTitle("软件升级")					.setMessage("发现新版本,建议立即更新使用.")					.setPositiveButton("更新",							new DialogInterface.OnClickListener() {								public void onClick(DialogInterface dialog,										int which) {									Intent updateIntent = new Intent(											MainActivity.this,											UpdateService.class);									updateIntent.putExtra(											"app_name",											getResources().getString(													R.string.app_name));									startService(updateIntent);								}							})					.setNegativeButton("取消",							new DialogInterface.OnClickListener() {								public void onClick(DialogInterface dialog,										int which) {									dialog.dismiss();								}							});			alert.create().show();		}	}}
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,

[java]
  1. @Override 
  2.     public int onStartCommand(Intent intent, int flags, int startId) { 
  3.  
  4.         app_name = intent.getStringExtra("app_name"); 
  5.         // 创建文件 
  6.         FileUtil.createFile(app_name);// 创建文件 
  7.  
  8.         createNotification();// 首次创建 
  9.  
  10.         createThread();// 线程下载 
  11.  
  12.         return super.onStartCommand(intent, flags, startId); 
  13.  
  14.     } 
@Override	public int onStartCommand(Intent intent, int flags, int startId) {		app_name = intent.getStringExtra("app_name");		// 创建文件		FileUtil.createFile(app_name);// 创建文件		createNotification();// 首次创建		createThread();// 线程下载		return super.onStartCommand(intent, flags, startId);	}

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:

[java]
  1. /***
  2.      * 创建通知栏
  3.      */ 
  4.     RemoteViews contentView; 
  5.     public void createNotification() { 
  6.         notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
  7.         notification = new Notification(); 
  8.         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. 
  9.         // 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.     } 
/***	 * 创建通知栏	 */	RemoteViews contentView;	public void createNotification() {		notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);		notification = new Notification();		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.		// 这个参数是通知提示闪出来的值.		notification.tickerText = "开始下载";		//		// updateIntent = new Intent(this, MainActivity.class);		// pendingIntent = PendingIntent.getActivity(this, 0, updateIntent, 0);		//		// // 这里面的参数是通知栏view显示的内容		// notification.setLatestEventInfo(this, app_name, "下载:0%",		// pendingIntent);		//		// notificationManager.notify(notification_id, notification);		/***		 * 在这里我们用自定的view来显示Notification		 */		contentView = new RemoteViews(getPackageName(),				R.layout.notification_item);		contentView.setTextViewText(R.id.notificationTitle, "正在下载");		contentView.setTextViewText(R.id.notificationPercent, "0%");		contentView.setProgressBar(R.id.notificationProgress, 100, 0, false);		notification.contentView = contentView;		updateIntent = new Intent(this, MainActivity.class);		updateIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);		pendingIntent = PendingIntent.getActivity(this, 0, updateIntent, 0);		notification.contentIntent = pendingIntent;		notificationManager.notify(notification_id, notification);	}
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

[java]
  1. /***
  2.      * 开线程下载
  3.      */ 
  4.     public void createThread() { 
  5.         /***
  6.          * 更新UI
  7.          */ 
  8.         final Handler handler = new Handler() { 
  9.             @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.     } 
/***	 * 开线程下载	 */	public void createThread() {		/***		 * 更新UI		 */		final Handler handler = new Handler() {			@Override			public void handleMessage(Message msg) {				switch (msg.what) {				case DOWN_OK:					// 下载完成,点击安装					Uri uri = Uri.fromFile(FileUtil.updateFile);					Intent intent = new Intent(Intent.ACTION_VIEW);					intent.setDataAndType(uri,							"application/vnd.android.package-archive");					pendingIntent = PendingIntent.getActivity(							UpdateService.this, 0, intent, 0);					notification.setLatestEventInfo(UpdateService.this,							app_name, "下载成功,点击安装", pendingIntent);					notificationManager.notify(notification_id, notification);					stopSelf();					break;				case DOWN_ERROR:					notification.setLatestEventInfo(UpdateService.this,							app_name, "下载失败", pendingIntent);					break;				default:					stopSelf();					break;				}			}		};		final Message message = new Message();		new Thread(new Runnable() {			@Override			public void run() {				try {					long downloadSize = downloadUpdateFile(down_url,							FileUtil.updateFile.toString());					if (downloadSize > 0) {						// 下载成功						message.what = DOWN_OK;						handler.sendMessage(message);					}				} catch (Exception e) {					e.printStackTrace();					message.what = DOWN_ERROR;					handler.sendMessage(message);				}			}		}).start();	}
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:

[java]
  1. /***
  2.      * 下载文件
  3.      *
  4.      * @return
  5.      * @throws MalformedURLException
  6.      */ 
  7.     public long downloadUpdateFile(String down_url, String file) 
  8.             throws Exception { 
  9.         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.     } 
/***	 * 下载文件	 * 	 * @return	 * @throws MalformedURLException	 */	public long downloadUpdateFile(String down_url, String file)			throws Exception {		int down_step = 5;// 提示step		int totalSize;// 文件总大小		int downloadCount = 0;// 已经下载好的大小		int updateCount = 0;// 已经上传的文件大小		InputStream inputStream;		OutputStream outputStream;		URL url = new URL(down_url);		HttpURLConnection httpURLConnection = (HttpURLConnection) url				.openConnection();		httpURLConnection.setConnectTimeout(TIMEOUT);		httpURLConnection.setReadTimeout(TIMEOUT);		// 获取下载文件的size		totalSize = httpURLConnection.getContentLength();		if (httpURLConnection.getResponseCode() == 404) {			throw new Exception("fail!");		}		inputStream = httpURLConnection.getInputStream();		outputStream = new FileOutputStream(file, false);// 文件存在则覆盖掉		byte buffer[] = new byte[1024];		int readsize = 0;		while ((readsize = inputStream.read(buffer)) != -1) {			outputStream.write(buffer, 0, readsize);			downloadCount += readsize;// 时时获取下载到的大小			/**			 * 每次增张5%			 */			if (updateCount == 0					|| (downloadCount * 100 / totalSize - down_step) >= updateCount) {				updateCount += down_step;				// 改变通知栏				// notification.setLatestEventInfo(this, "正在下载...", updateCount				// + "%" + "", pendingIntent);				contentView.setTextViewText(R.id.notificationPercent,						updateCount + "%");				contentView.setProgressBar(R.id.notificationProgress, 100,						updateCount, false);				// show_view				notificationManager.notify(notification_id, notification);			}		}		if (httpURLConnection != null) {			httpURLConnection.disconnect();		}		inputStream.close();		outputStream.close();		return downloadCount;	}
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

    该睡觉了.

转载地址:http://nhfsi.baihongyu.com/

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