如何管理Android中拨出电话的状态？

Question

I'm developing an android application for a university exam.
I use a Samsung Galaxy S3 with original ROM, Android Jelly Bean 4.3.

I have a problem with detecting the "states" of an outgoing call.
I need to know when the phone call "start" from my application and "stop" (rejected or not) because i have to pause and restart the playing song of a music service.

I have already done it with the incoming calls and it works perfectly in this way:

public void onReceive(Context context, Intent intent) {
    String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);

    if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
        if (Start.getMusicService().isPlaying()) {
            pauseService();

            isMusicPlaying = true;
        }
    }
    else if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
        if (isMusicPlaying){
            startService();

            isMusicPlaying = false;
        }
    }
}

For the outgoing calls i register the receiver in the manifest

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

and add the permission

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

I tried this solution for the receiver

public void onReceive(Context context, Intent intent) {
    TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
    telephonyManager.listen(new PhoneStateListener() {
        public void onCallStateChanged(int state, String number) {

            if (state == TelephonyManager.CALL_STATE_IDLE) {
                if (Start.getMusicService().isPlaying()) {
                    pauseService();

                    isMusicPlaying = true;
                }
            }
            else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
                if (isMusicPlaying){
                    startService();

                    isMusicPlaying = false;
                }
            }
        }
    }, PhoneStateListener.LISTEN_CALL_STATE);
}

I have already read other questions buy i didn't find the answer.
I hope you can help me.

Andrea

Answer 1

make procedure to read logcat of radio, command:

logcat -d -b radio RILJ:D RILC:D *:S

mine on android 2.3, when make outgoing call got output:

06-11 20:38:43.051 D/RILJ    (  429): [4678]< GET_CURRENT_CALLS  [id=1,ALERTING,toa=145,norm,mo,0,voc,noevp,,cli=1,,1] 

and when answered got output:

06-11 20:38:50.300 D/RILJ    (  429): [4683]< GET_CURRENT_CALLS  [id=1,ACTIVE,toa=145,norm,mo,0,voc,noevp,,cli=1,,1] 

so, to detect wether outgoingcall is answered, me make procedure to capture those logs and check if it

contain time > time-when-make-outgoing-call, and
contains string "GET_CURRENT_CALLS" and "ACTIVE".

and... IT WORKS, for me on sonyericsson-android 2.3.

i don't know if it works on other device and android version, you tell me.