blocks|key|390608|text|我可以使用Accessibility+Service做到这一点。使用此功能，您可以收听通知栏上的所有通知。我通过将包名称添加到可访问性服务service+info+(在本例中为com.whatsapp+)来听取应用程序规范。我无法读取消息，但只要有消息到达，我就会收到通知。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|390609|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/training/accessibility/service.html#create^0|1X|C|2G|C|5|L|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

I was able to do this using <a href="http://developer.android.com/training/accessibility/service.html#create">Accessibility Service</a> . Using this, you can listen to all notification on the notification bar. I listened to application-specification by adding the package name to the Accessibility Service <code>service info</code> , which in this case was <code>com.whatsapp</code>. I couldn't read the messages, but I get notified whenever a message arrives.

blocks|key|172614|text|辅助功能事件只捕获传入的通知事件，而不是在更新时捕获。目前，WhatsApp通知不会显示消息，只会显示发件人。然后，WhatsApp应用程序将该消息添加到更新中，但辅助功能服务无法捕获该更新。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|172615|您将只有类似于"1条来自XXX的新消息“的内容，但这可能足以满足您的需求。|172616|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Accessibility events only catch incoming notifications event, not when they are updated. For now, WhatsApp notifications don't display the message, only the sender. The message is then added by the WhatsApp app with an update, which can't be caught by the accessibility service.

You will only have something like "1 new message from XXX", but that may be sufficient to your needs.

blocks|key|390719|text|请参阅下面的示例来捕获whatsapp通知：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|390720|public+class+Notifier+extends+AccessibilityService+{


@Override
public+void+onCreate(){
++++//Toast.makeText(this,"Oncreate",+Toast.LENGTH_LONG).show();

}

@Override
protected+void+onServiceConnected()+{
++++//+Set+the+type+of+events+that+this+service+wants+to+listen+to.++Others
++++//+won't+be+passed+to+this+service.
++++Toast.makeText(this,"Service+connected",+Toast.LENGTH_LONG).show();
++++AccessibilityServiceInfo+info+=+new+AccessibilityServiceInfo();
++++info.feedbackType+=+AccessibilityServiceInfo.FEEDBACK_ALL_MASK;;
++++info.eventTypes+=+AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED+;

++++//+If+you+only+want+this+service+to+work+with+specific+applications,+set+their
++++//+package+names+here.++Otherwise,+when+the+service+is+activated,+it+will+listen
++++//+to+events+from+all+applications.
++++info.packageNames+=+new+String[]+{"com.whatsapp"};
++++info.notificationTimeout+=+100;

++++setServiceInfo(info);

}

@Override
public+void+onAccessibilityEvent(AccessibilityEvent+event)+{

++++if(event.getEventType()+==+AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED)+{

++++++++++++Toast.makeText(this,"Notification+Catched",+Toast.LENGTH_LONG).show();
++++++++}

++++}
}|code-block|syntax|javascript|390721|别忘了设置settings>Accessibility的权限才能访问系统事件。允许来自设置的权限。|390722|检查此链接|390723|accessibility+service+is+not+started|offset|length|390724|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/11087758/accessibility-service-is-not-started^0|0|0|0|0|0|10|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

See below example to catch whatsapp notifications:

<pre><code>public class Notifier extends AccessibilityService {


@Override
public void onCreate(){
 //Toast.makeText(this,"Oncreate", Toast.LENGTH_LONG).show();

}

@Override
protected void onServiceConnected() {
 // Set the type of events that this service wants to listen to. Others
 // won't be passed to this service.
 Toast.makeText(this,"Service connected", Toast.LENGTH_LONG).show();
 AccessibilityServiceInfo info = new AccessibilityServiceInfo();
 info.feedbackType = AccessibilityServiceInfo.FEEDBACK_ALL_MASK;;
 info.eventTypes = AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED ;

 // If you only want this service to work with specific applications, set their
 // package names here. Otherwise, when the service is activated, it will listen
 // to events from all applications.
 info.packageNames = new String[] {"com.whatsapp"};
 info.notificationTimeout = 100;

 setServiceInfo(info);

}

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {

 if(event.getEventType() == AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED) {

 Toast.makeText(this,"Notification Catched", Toast.LENGTH_LONG).show();
 }

 }
}
</code></pre>

And don't forget to set permission from settings>Accessibility in order to access the system events. Allow permission from settings .

check this link

<a href="https://stackoverflow.com/questions/11087758/accessibility-service-is-not-started">accessibility service is not started</a>

I'm working on a notification based app, for which I need to listen to incoming notifications. I've been able to listen to incoming calls, SMS, mail etc. I have no clue how to listen for pings or messages from friends on Whatsapp via code. Can this actually be done? If so, how? Can <a href="http://developer.android.com/training/accessibility/service.html#create" rel="noreferrer">Accessibility Service</a> be used for this, using Package Name as "com.whatsapp"?

Listen to incoming Whatsapp messages/notifications

短信

我正在开发一个基于通知的应用程序，我需要监听传入的通知。我已经能够监听来电、短信、邮件等。我不知道如何通过代码监听Whatsapp上朋友的ping或消息。这真的可以做到吗？如果是这样的话，是怎么做的？使用包名为"com.whatsapp“的可以做到这一点吗？

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