MyAccessibilityService.java

package com.viztushar.myaccessibility;

import android.accessibilityservice.AccessibilityService;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.os.Bundle;
import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
import android.util.Log;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;

/**
 * Created by Tushar on 24-05-2017.
 */

public class MyAccessibilityService extends AccessibilityService {


    private static final String TAG = MyAccessibilityService.class.getSimpleName();
    AccessibilityNodeInfo info;

    public MyAcc(){

    }


    public String getEventType(AccessibilityEvent event){
        switch (event.getEventType()) {
            case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:
                return "TYPE_NOTIFICATION_STATE_CHANGED";
            case AccessibilityEvent.TYPE_VIEW_CLICKED:
                return "TYPE_VIEW_CLICKED";
            case AccessibilityEvent.TYPE_VIEW_FOCUSED:
                return "TYPE_VIEW_FOCUSED";
            case AccessibilityEvent.TYPE_VIEW_LONG_CLICKED:
                return "TYPE_VIEW_LONG_CLICKED";
            case AccessibilityEvent.TYPE_VIEW_SELECTED:
                return "TYPE_VIEW_SELECTED";
            case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
                return "TYPE_WINDOW_STATE_CHANGED";
            case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:
                return "TYPE_VIEW_TEXT_CHANGED";
        }
        return "default";
    }

    public String getEventText(AccessibilityEvent accessibilityEvent){
        StringBuilder sb = new StringBuilder();
        for (CharSequence s : accessibilityEvent.getText()){
            sb.append(s);
        }
        return sb.toString();
    }

    @Override
    public void onAccessibilityEvent(AccessibilityEvent event) {
        String obj = event.getText().toString();
        String sub = obj.substring(1,obj.length() - 1);
        info = event.getSource();
        Log.v(TAG, String.format("onAccessibilityEvent: Type %s Text %s",
                getEventType(event), getEventText(event)));
        if(info != null && info.getClassName().equals("android.widget.EditText")){
            Bundle bundle = new Bundle();
            bundle.putCharSequence(AccessibilityNodeInfoCompat.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE,"hello");
            info.performAction(AccessibilityNodeInfoCompat.ACTION_SET_TEXT,bundle);
        }
    }

    @Override
    protected void onServiceConnected() {
        AccessibilityServiceInfo info = new AccessibilityServiceInfo();
        info.flags = AccessibilityServiceInfo.DEFAULT;
        info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK;
        info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
        setServiceInfo(info);
        super.onServiceConnected();
    }

    @Override
    public void onInterrupt() {

    }

    @Override
    public void onCreate() {
        super.onCreate();
    }
}