Android accessibility service



2 Answers

Accessibility Service is overkill for your purposes, you should use NotificationListenerService. The NotificationListenerService is much easier to implement and safer for users (privacy reasons).

Question

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.







onAccessibilityEvent(AccessibilityEvent event) not intercepting notification

I have a similar situation, this works in my application:

import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.util.Log;
import android.view.accessibility.AccessibilityEvent;
import android.widget.Toast;

public class NotificationAccessibilityService extends AccessibilityService
{
    public static final String TAG = "volumeMaster";

    @Override
    public void onAccessibilityEvent(AccessibilityEvent event)
    {
        Log.v(TAG, "***** onAccessibilityEvent");
        Toast.makeText(getApplicationContext(), "Got event from: " + event.getPackageName(), Toast.LENGTH_LONG).show();
    }

    @Override
    public void onInterrupt()
    {
        Log.v(TAG, "***** onInterrupt");
    }

    @Override
    public void onServiceConnected()
    {
        Log.v(TAG, "***** onServiceConnected");

        AccessibilityServiceInfo info = new AccessibilityServiceInfo();
        info.eventTypes = AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED;
        info.notificationTimeout = 100;
        info.feedbackType = AccessibilityEvent.TYPES_ALL_MASK;
        setServiceInfo(info);

    }
}

And in my manifest:

<service android:name=".accessibility.NotificationAccessibilityService" android:label="@string/app_name" android:enabled="true" android:exported="false">
        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService" />
        </intent-filter>

</service>

Parts of my solution came from: Accessibility Service from




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