How do you receive outgoing call in broadcastrecei

问题:

I am trying to identify and transfer to an activity after an outgoing call is initiated. I used ACTION_NEW_OUTGOING_CALL in the Intent filter. However how csn I identify that the call is outgoing. I did this for an incoming call (as seen below) but what can I use instead of EXTRA_STATE_RINGING.

public class OutgoingBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
        if (state.equals(TelephonyManager.EXTRA_STATE_RINGING))
        {
            Intent i = new Intent(context, OutgoingCallScreenDisplay.class);
            i.putExtras(intent);
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i);
        }
    }
}

回答1:

public class OutgoingBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)) {
           // If it is to call (outgoing)
           Intent i = new Intent(context, OutgoingCallScreenDisplay.class);
           i.putExtras(intent);
           i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
           context.startActivity(i);
        }
    }
}

ACTION_NEW_OUTGOING_CALL is a constant declare in the Intent class, not in TelephonyManager. When an outgoing call appears, then the system broadcasts an intent with this constant. If you really want to catch an outgoing call by using TelephonyManager then do this:

TelephonyManager tm = (TelephonyManager)context.getSystemService(Service.TELEPHONY_SERVICE);   
tm.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
PhoneStateListener listener = new PhoneStateListener() {
    @Override
    public void onCallStateChanged(int state, String incomingNumber) {
        // TODO Auto-generated method stub

        super.onCallStateChanged(state, incomingNumber);
        switch(state) {
            case TelephonyManager.CALL_STATE_IDLE:
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                if(incomingNumber==null) {
                    //outgoing call
                } else {
                    //incoming call
                }
                break;
            case TelephonyManager.CALL_STATE_RINGING:
                if(incomingNumber==null) {
                    //outgoing call
                } else {
                    //incoming call
                }
                break;
        }
    }
};

回答2:

Detect outgoing phone call event

1. Create OutgoingCallBroadcastReceiver

public class OutgoingCallReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(OutgoingCallReceiver.class.getSimpleName(), intent.toString());
        Toast.makeText(context, "Outgoing call catched!", Toast.LENGTH_LONG).show();
        //TODO: Handle outgoing call event here
    }
}

2. Register OutgoingCallBroadcastReceiver in AndroidManifest.xml

<receiver android:name=".OutgoingCallReceiver" >
    <intent-filter>
        <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
    </intent-filter>
</receiver>

3. Add permission in AndroidManifest.xml

<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>