Writing to the phone call stream IS possible, but not from the app level on a stock (non rooted) phone. When a phone call is initiated the mic is “typically” (really depends on the specific phone) routed directly to the baseband, ie skipping the main processor altogether. For outgoing audio: mic->codec->baseband For incoming audio: baseband->codec->speaker … Read more
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)) { // … Read more
It’s technically possible to inject audio into the voice call uplink on some platforms (Qualcomm’s MSM8960 and APQ8064, for example). Support exists at the hardware level and at the device driver level. But to make that functionality available to normal applications you’d have to create a custom Android ROM where you’ve added all the necessary … Read more
The official standard for providing a telephone number as a URI is here: http://www.ietf.org/rfc/rfc3966.txt It basically says use tel: as the prefix, and start the number with +[international dialling code] before the number itself. You can put non-numeric characters as separators (e.g. -) but they must be ignored. So a London (UK) number might be: … Read more
The ITelephony interface is internal, so you cannot get a standard reference to it. You could use reflection all the way, i.e. TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE); Method m1 = tm.getClass().getDeclaredMethod(“getITelephony”); m1.setAccessible(true); Object iTelephony = m1.invoke(tm); Method m2 = iTelephony.getClass().getDeclaredMethod(“silenceRinger”); Method m3 = iTelephony.getClass().getDeclaredMethod(“endCall”); m2.invoke(iTelephony); m3.invoke(iTelephony); But either way those methods need the MODIFY_PHONE_STATE permission, … Read more
According to the API, ACTION_CALL will do what you need but not to emergency numbers, while ACTION_DIAL will display a dialer with the dial prompt but allows to call emergency numbers. I’m afraid there is no way to do what you want, for a good reason – to prevent misdials to emergency services. It’s a … Read more
The MSM8960 provides an ALSA control named Incall_Music Audio Mixer, to which you can connect CPU DAIs MultiMedia1 and MultiMedia2 (which would correspond to ALSA devices pcmC0D0p and pcmC0D1p, respectively). (see the msm-pcm-routing source code) So if you had a voice call running and wanted to play some audio on the uplink through pcmC0D0p you … Read more
create PhoneCallReceiver .java import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.telephony.PhoneStateListener; import android.telephony.TelephonyManager; import android.util.Log; import android.widget.Toast; public class PhoneCallReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { TelephonyManager telephony = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); PhoneCallStateListener customPhoneListener = new PhoneCallStateListener(context); telephony.listen(customPhoneListener, PhoneStateListener.LISTEN_CALL_STATE); }} now create PhoneCallStateListener .java import java.lang.reflect.Method; import android.content.Context; import android.content.Intent; import … Read more
Some mobile platforms do support this functionality at the platform-level (e.g. I’ve tested this with the Qualcomm APQ8064 where I had configured the hardware codec route accordingly, and it works). But Android doesn’t have an API that let’s you use this as an app developer, so on a non-rooted phone there’s not really anything you … Read more
Yup. You need to take those out yourself. Or you can use the snippet below… NSString *cleanedString = [[phoneNumber componentsSeparatedByCharactersInSet:[[NSCharacterSet characterSetWithCharactersInString:@”0123456789-+()”] invertedSet]] componentsJoinedByString:@””]; NSURL *telURL = [NSURL URLWithString:[NSString stringWithFormat:@”tel:%@”, cleanedString]]; Note: you may be tempted to use -stringByTrimmingCharactersInSet:, but that one only removes characters at the start and the end of the string, not if … Read more