Jeff Storey Jeff Storey - 5 months ago 19
Android Question

Android accessibility service

I'm trying to write a very basic android accessibility service that shows a message and vibrates when any notification is raised. I've tried testing it by sending an email myself on my phone (I figured that would show some notification). But I have not seen any notifications.

My service code looks like

public class NotifierService extends AccessibilityService {

@Override
public void onAccessibilityEvent(AccessibilityEvent evt) {
Toast.makeText(this, "Got event from " + evt.getPackageName(), Toast.LENGTH_SHORT)
.show();
Vibrator v = (Vibrator) getSystemService(VIBRATOR_SERVICE);
v.vibrate(new long[] { 0, 250, 250, 250, 250, 250, 250, 250, 250 }, -1);
}

@Override
public void onInterrupt() { }
}


I have verified that the service is running and I have enabled it in the accessibility menu of the phone. And the manifest looks like this (some parts are removed that are not relevant):

<uses-permission android:name="android.permission.VIBRATE" />
<application>
<activity
android:name=".MyActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

<service android:name=".NotifierService" android:enabled="true" >
<intent-filter>
<action android:name="android.accessibilityservice.AccessibilityService" />
</intent-filter>
</service>
</application>


MyActivity
is just an activity with a button for starting/stopping the service.

Answer

I added a meta data element inside the service tag

<meta-data android:name="android.accessibilityservice" android:resource="@xml/accessibilityservice" />

And in the xml resources file I have

<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
                       android:accessibilityEventTypes="typeNotificationStateChanged"
                       android:accessibilityFeedbackType="feedbackAllMask"
                       android:notificationTimeout="100" />
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