How to detect that the call which is done from our android device is answered or rejceted?

Question

I am making an application to call multiple numbers.

In that app

1. When I call to 1 person and if the call is answered by the user then the loop should be stopped.

2. But If the call is rejected then the call should be on next number and loop should be couninue.

My problem is I cant detect whether the call is rejected or answered. when I had search on net some people says it is not possible to detect the call is answered or rejected.

Is it really not possible to detect the call in android If it is possible then how can I do that?

Answer 1

I think you can check outgoing call time of last call in PhoneStateListener class' onCallStateChanged method. Fetch the data if state is idle that is TelephonyManager.CALL_STATE_IDLE.

Something like this:

Cursor mCallCursor = context.getContentResolver().query(android.provider.CallLog.Calls.CONTENT_URI,null,null,null,null);
int duration = mCallCursor.getColumnIndex( CallLog.Calls.DURATION);
while(mCallCursor.moveToFirst())
{   
    Toast.makeText(context, mCallCursor.getString(duration), Toast.LENGTH_LONG).show();
}

You can find more about that here. I haven't tested the above code. But something like that should work.

You can check if time's 00:00, then call next number of loop. Else you can stop calling.

Hope this helps you.

Answer 2

below is a code of detecting outgoing call by accessibility events -

Add a class which extends AccessibilityService in your projects -

public class CallDetection extends AccessibilityService {
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
     acquireLock(this);
    Log.d("myaccess","after lock");
    if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED) {
        Log.d("myaccess","in window changed");
        AccessibilityNodeInfo info = event.getSource();
        if (info != null && info.getText() != null) {
            String duration = info.getText().toString();
            String zeroSeconds = String.format("%02d:%02d", new Object[]{Integer.valueOf(0), Integer.valueOf(0)});
            String firstSecond = String.format("%02d:%02d", new Object[]{Integer.valueOf(0), Integer.valueOf(1)});
            Log.d("myaccess","after calculation - "+ zeroSeconds + " --- "+ firstSecond + " --- " + duration);
            if (zeroSeconds.equals(duration) || firstSecond.equals(duration)) {
                Toast.makeText(getApplicationContext(),"Call answered",Toast.LENGTH_SHORT).show();
               // Your Code goes here
            }
            info.recycle();
        }
    }
}


@Override
protected void onServiceConnected() {
    super.onServiceConnected();
    Toast.makeText(this,"Service connected",Toast.LENGTH_SHORT).show();
    AccessibilityServiceInfo info = new AccessibilityServiceInfo();
    info.eventTypes = AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED;
    info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
    info.notificationTimeout = 0;
    info.packageNames = null;
    setServiceInfo(info);
}

@Override
public void onInterrupt() {

}
}

But to get the function event.getSource() working you have to specify some of your service configuration through xml, so create a xml folder in your project and add a xml file called serviceconfig.xml (you can give any name you want.

The content of serviceconfig is below -

<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
android:description="@string/callDetection"
android:accessibilityEventTypes="typeWindowContentChanged"
android:notificationTimeout="100"
android:canRetrieveWindowContent="true"
/>

You can find more about serviceconfig in Here

Now add your service in you Manifest file like this -

<service android:name=".CallDetection"
        android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"
        android:label="@string/callDetection">
        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService" />
        </intent-filter>
        <meta-data
            android:name="android.accessibilityservice"
            android:resource="@xml/serviceconfig" />
</service>

And youre done, just run the app and go to Accessibility settings in your phone, you will find an option named as detection (or whatever name you have given as your service description), switch that on to give accesibility permissions for you app.

Now you will see a toast when call is answered.

you can Code any code you want in there, also you can call a callback function in your activity

Most important - Dont call your call window(android dialer window) untill the call is answered, otherwise this will not work.

Note - As android doesn't provide any solution to detect if the call is answered or not, this is the best alternative i have made, hope it works for you.