將數據從服務發送到活動時出錯

我的應用程序描述如下：應用程序將從服務器接收推送信息並顯示在android的通知欄上。當我點擊應用程序的通知時，會加載我從服務器獲得的URL。但現在我的問題是，我無法將從服務器收到的網址發送到原始活動。將數據從服務發送到活動時出錯

下面是我運行應用程序時得到的錯誤。

04-09 11:25:26.503: E/AndroidRuntime(1030): FATAL EXCEPTION: IntentService[GCMIntentService-810012644757-1] 
04-09 11:25:26.503: E/AndroidRuntime(1030): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want? 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at android.app.ContextImpl.startActivity(ContextImpl.java:624) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at android.content.ContextWrapper.startActivity(ContextWrapper.java:258) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at com.ketan.demo.GCMIntentService.generateNotification(GCMIntentService.java:118) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at com.ketan.demo.GCMIntentService.onMessage(GCMIntentService.java:70) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at com.google.android.gcm.GCMBaseIntentService.onHandleIntent(GCMBaseIntentService.java:179) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:59) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at android.os.Looper.loop(Looper.java:130) 
04-09 11:25:26.503: E/AndroidRuntime(1030):  at android.os.HandlerThread.run(HandlerThread.java:60)

我的代碼：

private static void generateNotification(Context context, String message) { 
    int icon = R.drawable.ic_stat_gcm; 
    long when = System.currentTimeMillis(); 
    NotificationManager notificationManager = (NotificationManager) 
      context.getSystemService(Context.NOTIFICATION_SERVICE); 
    Notification notification = new Notification(icon, message, when); 
    String title = context.getString(R.string.app_name); 
    Intent notificationIntent = new Intent().setClass(context.getApplicationContext(), DemoActivity.class); 
    // set intent so it does not start a new activity 
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_MULTIPLE_TASK);      
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | 
      Intent.FLAG_ACTIVITY_SINGLE_TOP); 
    PendingIntent intent = 
      PendingIntent.getActivity(context, 0, notificationIntent, 0); 
    notification.setLatestEventInfo(context, title, message, intent); 
    notification.flags |= Notification.FLAG_AUTO_CANCEL; 
    notificationManager.notify(0, notification); 
    notificationIntent.putExtra("URL", message); 
    // Launch the new activity and add the additional flags to the intent 
    context.getApplicationContext().startActivity(notificationIntent); 

    /*Intent i = new Intent().setClass(context.getApplicationContext(), DemoActivity.class); 
    i.setFlags(Intent.FLAG_ACTIVITY_MULTIPLE_TASK);      
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
    i.putExtra("URL", message); 
    // Launch the new activity and add the additional flags to the intent 
    context.getApplicationContext().startActivity(i);*/ 
}

活動演示

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    checkNotNull(SERVER_URL, "http://10.0.2.2:8080/gcm-demo-server/"); 
    // checkNotNull(SENDER_ID, "972801588344"); 
    // Make sure the device has the proper dependencies. 
    GCMRegistrar.checkDevice(this); 
    // Make sure the manifest was properly set - comment out this line 
    // while developing the app, then uncomment it when it's ready. 
    GCMRegistrar.checkManifest(this); 
    setContentView(R.layout.main); 
    Bundle extras = getIntent().getExtras(); 
    if (extras != null) { 
     url = extras.getString("URL"); 
    } 
    web=(WebView) findViewById(R.id.webView1); 
    if(url==null) 
    {  
     web.loadUrl("http://kqxs.vn/trang_chu"); 
    }else 
    { 
     web.loadUrl(url); 
    } 
}

我固定的

private static void generateNotification(Context context, String message) { 
    int icon = R.drawable.ic_stat_gcm; 
    long when = System.currentTimeMillis(); 
    NotificationManager notificationManager = (NotificationManager) 
      context.getSystemService(Context.NOTIFICATION_SERVICE); 
    Notification notification = new Notification(icon, message, when); 
    String title = context.getString(R.string.app_name); 
    Intent notificationIntent = new Intent(context, DemoActivity.class); 
    // set intent so it does not start a new activity 
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | 
      Intent.FLAG_ACTIVITY_SINGLE_TOP); 
    notificationIntent.putExtra("URL", message); 
    PendingIntent intent = 
      PendingIntent.getActivity(context, 0, notificationIntent, 0); 
    notification.setLatestEventInfo(context, title, message, intent); 
    notification.flags |= Notification.FLAG_AUTO_CANCEL; 
    notificationManager.notify(0, notification); 
}

以下但我有一個問題，這是唯一的應用程序，我加載正確的網址第一次，從第二次，從服務器收到一個新的URL後，但我的應用程序加載的URL的第一次。我已經試了又試很多次，但仍然獲得結果，因此...

來源

2013-04-09 user2020189

請參閱以下問題：

Android:What is difference between setFlags and addFlags for intent

Intent.setFlags :意味着你通過增加新的標誌，以意圖取代舊標誌

Intent.addFlags :意味着您添加了新的標誌且已添加到意圖

因此，您將需要使用notificationIntent.addFlags而不是notificationIntent.setFlags用於追加Intent.FLAG_ACTIVITY_NEW_TASK標誌notificationIntent意圖爲：

....... 
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_MULTIPLE_TASK);     
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | 
     Intent.FLAG_ACTIVITY_SINGLE_TOP); 
.......

來源

2013-04-09 04:49:41

將數據從服務發送到活動時出錯

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