Android : Switching Audio Between Bluetooth And Phone Speaker Is Inconsistent

My requirement is to switch audio between Bluetooth and phone speaker as per user selection. Below is the code snippet: //AudioTrack for incoming audio to play as below: int m

Solution 1:

I got the reason of inconsistent audio routing, it was because I was setting phone speaker false, also I was using inappropriate mode... below combination worked for me:

//For BT
mAudioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
mAudioManager.startBluetoothSco();
mAudioManager.setBluetoothScoOn(true);

//For phone ear piece
mAudioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
mAudioManager.stopBluetoothSco();
mAudioManager.setBluetoothScoOn(false);
mAudioManager.setSpeakerphoneOn(false);

//For phone speaker(loadspeaker)
mAudioManager.setMode(AudioManager.MODE_NORMAL);
mAudioManager.stopBluetoothSco();
mAudioManager.setBluetoothScoOn(false);
mAudioManager.setSpeakerphoneOn(true);

Android version: 4.3

Thanks!

Solution 2:

if it still relevant to someone, this is my solution:

(tested on samsung s7 sm-g9307 with android version 6.0.1)

public class AudioSourceUtil {

private static void reset(AudioManager audioManager) {
    if (audioManager != null) {
        audioManager.setMode(AudioManager.MODE_NORMAL);
        audioManager.stopBluetoothSco();
        audioManager.setBluetoothScoOn(false);
        audioManager.setSpeakerphoneOn(false);
        audioManager.setWiredHeadsetOn(false);
    }
}

public static void connectEarpiece(AudioManager audioManager) {
    reset(audioManager);
    audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
}

public static void connectSpeaker(AudioManager audioManager) {
    reset(audioManager);
    audioManager.setSpeakerphoneOn(true);
}

public static void connectHeadphones(AudioManager audioManager) {
    reset(audioManager);
    audioManager.setWiredHeadsetOn(true);
}

public static void connectBluetooth(AudioManager audioManager) {
    reset(audioManager);
}

}

And for the usage by clicking a button (tab in tab layout):

/**
 * There are 3 scenarios for the audio source:
 * 1. No headphones and no bluetooth device: toggle phone/ speaker
 * 2. Headphones connected: toggle headphones/ speaker
 * 3. Bluetooth connected: toggle  phone/ speaker/ bluetooth
 *
 * @param tab
 */
private void handleTabAudioSourceClick(TabLayout.Tab tab) {
    View view = tab.getCustomView();
    ImageView icon = (ImageView) view.findViewById(R.id.imageViewIcon);
    int currentAudioSourceIdentifier = (Integer) view.getTag();

    if (audioManager.isWiredHeadsetOn() == false && BluetoothManager.isBluetoothHeadsetConnected() == false) {
        // No headphones and no bluetooth device: toggle phone/ speaker.
        if (currentAudioSourceIdentifier == R.drawable.tab_speaker) {
            // Current audio source is earpiece, moving to speaker.
            view.setTag(android.R.drawable.stat_sys_speakerphone);
            icon.setImageResource(android.R.drawable.stat_sys_speakerphone);
            AudioSourceUtil.connectSpeaker(audioManager);
        } else {
            // Current audio source is speaker, moving to earpiece.
            view.setTag(R.drawable.tab_speaker);
            icon.setImageResource(R.drawable.tab_speaker);
            AudioSourceUtil.connectEarpiece(audioManager);
        }
    } else if (audioManager.isWiredHeadsetOn()) {
        // Headphones connected: toggle headphones/ speaker.
        if (currentAudioSourceIdentifier == android.R.drawable.stat_sys_speakerphone) {
            // Current audio source is speaker, moving to headphones.
            view.setTag(android.R.drawable.stat_sys_headset);
            icon.setImageResource(android.R.drawable.stat_sys_headset);
            AudioSourceUtil.connectHeadphones(audioManager);
        } else {
            // Current audio source is headphones, moving to speaker.
            view.setTag(android.R.drawable.stat_sys_speakerphone);
            icon.setImageResource(android.R.drawable.stat_sys_speakerphone);
            AudioSourceUtil.connectSpeaker(audioManager);
        }
    } else if (BluetoothManager.isBluetoothHeadsetConnected()) {
        // Bluetooth connected: toggle  phone/ speaker/ bluetooth.
        if (currentAudioSourceIdentifier == R.drawable.tab_speaker) {
            // Current audio source is earpiece, moving to speaker.
            view.setTag(android.R.drawable.stat_sys_speakerphone);
            icon.setImageResource(android.R.drawable.stat_sys_speakerphone);
            AudioSourceUtil.connectSpeaker(audioManager);
        } else if (currentAudioSourceIdentifier == android.R.drawable.stat_sys_speakerphone) {
            // Current audio source is speaker, moving to bluetooth.
            view.setTag(android.R.drawable.stat_sys_data_bluetooth);
            icon.setImageResource(android.R.drawable.stat_sys_data_bluetooth);
            AudioSourceUtil.connectBluetooth(audioManager);
        } else {
            // Current audio source is bluetooth, moving to earpiece.
            view.setTag(R.drawable.tab_speaker);
            icon.setImageResource(R.drawable.tab_speaker);
            AudioSourceUtil.connectEarpiece(audioManager);
        }
    }
}

Solution 3:

Use MediaRouter api's for this: https://developer.android.com/guide/topics/media/mediarouter

It is designed specially for this. Something like this:

mediaRouter = MediaRouter.getInstance(VideoCallingApp.getContext());
mediaRouteSelector = new MediaRouteSelector.Builder()
            .addControlCategory(MediaControlIntent.CATEGORY_LIVE_AUDIO)
            .build();
....

public void onStart() {
    mediaRouter.addCallback(mediaRouteSelector, mMediaRouterCallback,
            MediaRouter.CALLBACK_FLAG_REQUEST_DISCOVERY);
    super.onStart();
}

@Override
public void onStop() {
    mediaRouter.removeCallback(mMediaRouterCallback);
    super.onStop();
}

...and when you want to switch audio device then use mediaRouter.getRoutes() and mediaRouter.selectRoute(route) API's.