Detecting outgoing call and call hangup event in android

You should create a BroadcastReceiver:

public class CallReciever extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(                TelephonyManager.EXTRA_STATE_RINGING)) {                // Phone number                 String incomingNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);                // Ringing state                // This code will execute when the phone has an incoming call        } else if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(                TelephonyManager.EXTRA_STATE_IDLE)                || intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(                        TelephonyManager.EXTRA_STATE_OFFHOOK)) {            // This code will execute when the call is answered or disconnected        }    }}

You should register you application to listen to these intents in the manifest:

<receiver android:name=".CallReciever" >            <intent-filter>                <action android:name="android.intent.action.PHONE_STATE" />            </intent-filter> </receiver>

There is a simpler solution using only TelephonyManager and PhoneStateListener.You don´t even have to register a BroadcastReceiver.

public class MyPhoneStateListener extends PhoneStateListener {    @Override    public void onCallStateChanged(int state, String incomingNumber) {        switch (state) {            //Hangup            case TelephonyManager.CALL_STATE_IDLE:                break;            //Outgoing            case TelephonyManager.CALL_STATE_OFFHOOK:                break;            //Incoming            case TelephonyManager.CALL_STATE_RINGING:                break;        }    }}

And to register it:

public static void registerListener(Context context) {    ((TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE)).listen(new MyPhoneStateListener(),            PhoneStateListener.LISTEN_CALL_STATE);}

You need to create a receiver for the following intent actions:

1. Outgoing call - ACTION_NEW_OUTGOING_CALL
2. Call hangup - ACTION_PHONE_STATE_CHANGED