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Android实现APP自动更新功能

现在一般的android软件都是需要不断更新的，当你打开某个app的时候，如果有新的版本，它会提示你有新版本需要更新。该小程序实现的就是这个功能。

该小程序的特点是，当有更新时，会弹出一个提示框，点击确定，则在通知来创建一个进度条进行下载，点击取消，则取消更新。

以下是详细代码:

1.创建布局文件notification_item.xml，用于在通知栏生成一个进度条和下载图标。

 

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1 2 3 4 5 <relativelayout android:layout_height= "fill_parent" android:layout_width= "fill_parent" android:padding= "3dp" xmlns:android= "http://schemas.android/apk/res/android" ><imageview android:id= "@+id/notificationImage" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:src= "@android:drawable/stat_sys_download" ><textview android:id= "@+id/notificationTitle" android:layout_alignparentright= "true" android:layout_height= "wrap_content" android:layout_torightof= "@id/notificationImage" android:layout_width= "wrap_content" android:paddingleft= "6dp" android:textcolor= "#FF000000" ><textview android:id= "@+id/notificationPercent" android:layout_below= "@id/notificationImage" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:paddingtop= "2dp" android:textcolor= "#FF000000" >        <progressbar android:id= "@+id/notificationProgress" android:layout_alignleft= "@id/notificationTitle" android:layout_alignparentright= "true" android:layout_aligntop= "@id/notificationPercent" android:layout_below= "@id/notificationTitle" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:paddingleft= "6dp" android:paddingright= "3dp" android:paddingtop= "2dp" style= "@style/ProgressBarHorizontal_color" >   </progressbar></textview></textview></imageview></relativelayout>

2.创建AppContext类，该类继承自Application。

 

 

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 package com.test.application;   import android.app.Application; import android.content.Context;   import com.test.update.config.Config;   public class AppContext extends Application {      private static AppContext appInstance;      private Context context;        public static AppContext getInstance() {          return appInstance;      }        @Override      public void onCreate() {          // TODO Auto-generated method stub          super .onCreate();          appInstance = this ;          context = this .getBaseContext(); //      // 获取当前版本号 //      try { //          PackageInfo packageInfo = getApplicationContext() //                  .getPackageManager().getPackageInfo(getPackageName(), 0); //          Config.localVersion = packageInfo.versionCode; //          Config.serverVersion = 1;// 假定服务器版本为2，本地版本默认是1 //      } catch (NameNotFoundException e) { //          e.printStackTrace(); //      }          initGlobal();      }        public void initGlobal() {          try {              Config.localVersion = getPackageManager().getPackageInfo(                      getPackageName(), 0 ).versionCode; // 设置本地版本号              Config.serverVersion = 2 ; // 假定服务器版本为2，本地版本默认是1--实际开发中是从服务器获取最新版本号，android具体与后端的交互见我另///外的博文          } catch (Exception ex) {              ex.printStackTrace();          }      } }

3.创建配置文件类Config.java,在这个类里面定义一些与版本相关的常量

 

 

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1 2 3 4 5 6 7 8 9 10 11 package com.test.update.config;   public class Config {      //版本信息      public static int localVersion = 0 ;      public static int serverVersion = 0 ;      /* 下载包安装路径 */       public static final String savePath = /sdcard/test/;           public static final String saveFileName = savePath + test.apk;  }


 

4.编写更新服务类UpdateServcie.java

 

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 package com.test.update;   import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.HttpURLConnection; import java.URL;   import android.annotation.SuppressLint; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Intent; import android.Uri; import android.os.Environment; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.widget.RemoteViews;   import com.test.update.config.Config;   public class UpdateService extends Service {      // 标题      private int titleId = 0 ;        // 文件存储      private File updateDir = null ;      private File updateFile = null ;      // 下载状态      private final static int DOWNLOAD_COMPLETE = 0 ;      private final static int DOWNLOAD_FAIL = 1 ;      // 通知栏      private NotificationManager updateNotificationManager = null ;      private Notification updateNotification = null ;      // 通知栏跳转Intent      private Intent updateIntent = null ;      private PendingIntent updatePendingIntent = null ;      /***       * 创建通知栏       */      RemoteViews contentView;      // 这样的下载代码很多，我就不做过多的说明      int downloadCount = 0 ;      int currentSize = 0 ;      long totalSize = 0 ;      int updateTotalSize = 0 ;        // 在onStartCommand()方法中准备相关的下载工作：      @SuppressWarnings (deprecation)      @Override      public int onStartCommand(Intent intent, int flags, int startId) {          // 获取传值          titleId = intent.getIntExtra(titleId, 0 );          // 创建文件          if (android.os.Environment.MEDIA_MOUNTED.equals(android.os.Environment                  .getExternalStorageState())) {              updateDir = new File(Environment.getExternalStorageDirectory(),                      Config.saveFileName);              updateFile = new File(updateDir.getPath(), getResources()                      .getString(titleId) + .apk);          }            this .updateNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);          this .updateNotification = new Notification();            // 设置下载过程中，点击通知栏，回到主界面          updateIntent = new Intent( this , UpdateActivity. class );          updatePendingIntent = PendingIntent.getActivity( this , 0 , updateIntent,                  0 );          // 设置通知栏显示内容          updateNotification.icon = R.drawable.ic_launcher;          updateNotification.tickerText = 开始下载;          updateNotification.setLatestEventInfo( this , QQ, 0 %,                  updatePendingIntent);          // 发出通知          updateNotificationManager.notify( 0 , updateNotification);            // 开启一个新的线程下载，如果使用Service同步下载，会导致ANR问题，Service本身也会阻塞          new Thread( new updateRunnable()).start(); // 这个是下载的重点，是下载的过程            return super .onStartCommand(intent, flags, startId);      }        @Override      public IBinder onBind(Intent arg0) {          // TODO Auto-generated method stub          return null ;      }        @SuppressLint (HandlerLeak)      private Handler updateHandler = new Handler() {          @Override          public void handleMessage(Message msg) {              switch (msg.what) {                                case DOWNLOAD_COMPLETE:                  // 点击安装PendingIntent                  Uri uri = Uri.fromFile(updateFile);                  Intent installIntent = new Intent(Intent.ACTION_VIEW);                  installIntent.setDataAndType(uri,                          application/vnd.android. package -archive);                    updatePendingIntent = PendingIntent.getActivity(                          UpdateService. this , 0 , installIntent, 0 );                    updateNotification.defaults = Notification.DEFAULT_SOUND; // 铃声提醒                  updateNotification.setLatestEventInfo(UpdateService. this ,                          QQ, 下载完成,点击安装。, updatePendingIntent);                  updateNotificationManager.notify( 0 , updateNotification);                    // 停止服务                  stopService(updateIntent);              case DOWNLOAD_FAIL:                  // 下载失败                  updateNotification.setLatestEventInfo(UpdateService. this ,                          QQ, 下载完成,点击安装。, updatePendingIntent);                  updateNotificationManager.notify( 0 , updateNotification);              default :                  stopService(updateIntent);              }          }      };        public long downloadUpdateFile(String downloadUrl, File saveFile)              throws Exception {            HttpURLConnection httpConnection = null ;          InputStream is = null ;          FileOutputStream fos = null ;            try {              URL url = new URL(downloadUrl);              httpConnection = (HttpURLConnection) url.openConnection();              httpConnection                      .setRequestProperty(User-Agent, PacificHttpClient);              if (currentSize > 0 ) {                  httpConnection.setRequestProperty(RANGE, bytes=                          + currentSize + -);              }              httpConnection.setConnectTimeout( 10000 );              httpConnection.setReadTimeout( 20000 );              updateTotalSize = httpConnection.getContentLength();              if (httpConnection.getResponseCode() == 404 ) {                  throw new Exception(fail!);              }              is = httpConnection.getInputStream();              fos = new FileOutputStream(saveFile, false );              byte buffer[] = new byte [ 4096 ];              int readsize = 0 ;              while ((readsize = is.read(buffer)) > 0 ) {                  fos.write(buffer, 0 , readsize);                  totalSize += readsize;                  // 为了防止频繁的通知导致应用吃紧，百分比增加10才通知一次                  if ((downloadCount == 0 )                          || ( int ) (totalSize * 100 / updateTotalSize) - 10 > downloadCount) {                      downloadCount += 10 ;                        updateNotification.setLatestEventInfo(UpdateService. this ,                              正在下载, ( int ) totalSize * 100 / updateTotalSize                                      + %, updatePendingIntent);                                              /***                       * 在这里我们用自定的view来显示Notification                       */                      updateNotification.contentView = new RemoteViews(                              getPackageName(), R.layout.notification_item);                      updateNotification.contentView.setTextViewText(                              R.id.notificationTitle, 正在下载);                      updateNotification.contentView.setProgressBar(                              R.id.notificationProgress, 100 , downloadCount, false );                                            updateNotificationManager.notify( 0 , updateNotification);                  }              }          } finally {              if (httpConnection != null ) {                  httpConnection.disconnect();              }              if (is != null ) {                  is.close();              }              if (fos != null ) {                  fos.close();              }          }          return totalSize;      }        class updateRunnable implements Runnable {          Message message = updateHandler.obtainMessage();            public void run() {              message.what = DOWNLOAD_COMPLETE;                                          try {                  // 增加权限<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE">;                  if (!updateDir.exists()) {                      updateDir.mkdirs();                  }                  if (!updateFile.exists()) {                      updateFile.createNewFile();                  }                  // 下载函数，以QQ为例子                  // 增加权限<uses-permission android:name="android.permission.INTERNET">;                  long downloadSize = downloadUpdateFile(                          http: //softfile.3g.qq:8080/msoft/179/1105/10753/MobileQQ1.0(Android)_Build0198.apk,                          updateFile);                  if (downloadSize > 0 ) {                      // 下载成功                      updateHandler.sendMessage(message);                  }              } catch (Exception ex) {                  ex.printStackTrace();                  message.what = DOWNLOAD_FAIL;                  // 下载失败                  updateHandler.sendMessage(message);              }          }      } } </uses-permission></uses-permission>

5.编写活动类UpdateActivity

 

 

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 package com.test.update;   import com.test.update.config.Config;   import android.support.v4.app.Fragment; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater;   public class UpdateActivity extends Activity {        @Override      protected void onCreate(Bundle savedInstanceState) {          super .onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          checkVersion();      }        /**       * 检查更新版本       */      public void checkVersion() {            if (Config.localVersion < Config.serverVersion) {              Log.i(hgncxzy, ==============================);              // 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) {                                      // 开启更新服务UpdateService                                      // 这里为了把update更好模块化，可以传一些updateService依赖的值                                      // 如布局ID，资源ID，动态获取的标题,这里以app_name为例                                      Intent updateIntent = new Intent(                                              UpdateActivity. this ,                                              UpdateService. class );                                      updateIntent.putExtra(titleId,                                              R.string.app_name);                                      startService(updateIntent);                                  }                              })                      .setNegativeButton(取消,                              new DialogInterface.OnClickListener() {                                  public void onClick(DialogInterface dialog,                                          int which) {                                      dialog.dismiss();                                  }                              });              alert.create().show();          } else {              // 清理工作，略去              // cheanUpdateFile()          }      } }

6.添加权限以及将服务静态加载(在配置文件中加载)。

本文标签： 自动更新版本功能androidapp

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