Android实现APP自动更新功能

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:padding="3dp" >   <ImageView   android:id="@+id/notificationImage"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:src="@android:drawable/stat_sys_download" />   <TextView   android:id="@+id/notificationTitle"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_alignParentRight="true"   android:layout_toRightOf="@id/notificationImage"   android:paddingLeft="6dp"   android:textColor="#FF000000" />   <TextView   android:id="@+id/notificationPercent"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_below="@id/notificationImage"   android:paddingTop="2dp"   android:textColor="#FF000000" />   <ProgressBar   android:id="@+id/notificationProgress"   style="@style/ProgressBarHorizontal_color"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_alignLeft="@id/notificationTitle"   android:layout_alignParentRight="true"   android:layout_alignTop="@id/notificationPercent"   android:layout_below="@id/notificationTitle"   android:paddingLeft="6dp"   android:paddingRight="3dp"   android:paddingTop="2dp" />  </RelativeLayout> 

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();   }  } } 

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"; } 

package com.test.update;  import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.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.net.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.com: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);    }   }  } } 

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()   }  } } 

<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /> 

<service android:name="com.test.update.UpdateService" >   </service>

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"  package="com.test.update"  android:versionCode="1"  android:versionName="1.0" >   <uses-sdk   android:minSdkVersion="8"   android:targetSdkVersion="8" />   <application   android:name="com.test.application.AppContext"   android:icon="@drawable/ic_launcher"   android:label="@string/app_name" >   <activity    android:name="com.test.update.UpdateActivity"    android:label="@string/app_name" >    <intent-filter>     <action android:name="android.intent.action.MAIN" />      <category android:name="android.intent.category.LAUNCHER" />    </intent-filter>   </activity>   <service android:name="com.test.update.UpdateService" >   </service>  </application>   <uses-permission android:name="android.permission.INTERNET" />  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />  </manifest>