I`m trying to make an android app that can control Bluetooth volume.
till now i managed to change Bluetooth volume value for calls. using this piece of code :
audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
int streamMaxVolume = audioManager.getStreamMaxVolume(6);
int lVol = ((volumeValue / 100) * streamMaxVolume);
audioManager.setStreamVolume(6, lVol, 0);
now the problem that I have is I cannot find the int value for streamType which is allocated for Bluetooth Media volume.
well I found the answer.
looks like after a bluetooth device connect to the phone. in order to change the bluetooth media volume the app should wait for some amount of time. I`ve set my method to run its codes after 10sec. here it is :
public void strat(BtDevice btDevice){
new Timer().schedule(
new TimerTask() {
#Override
public void run() {
AudioManager audioManager = (AudioManager) myContex.getSystemService(Context.AUDIO_SERVICE);
int volumeValue = btDevice.getMusicVolume();
int streamMaxVolume = audioManager.getStreamMaxVolume(3);
int lVol = ((volumeValue / 100) * streamMaxVolume);
audioManager.setStreamVolume(3, lVol, AudioManager.FLAG_SHOW_UI);
}
},
10000
);
I use AudioRecord to record music but when I record it uses the phone mic.
how can I force him to use the channel of the Headphone?
I use this code:
int minSize = AudioRecord.getMinBufferSize(8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
AudioRecord ar = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, 8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, minSize);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
recorder[0] = false;
}
}, timeInSecondsToRecord * 1000);
short[] buffer = new short[minSize];
ar.startRecording();
Log.d("Started","Reording");
while (recorder[0]) {
ar.read(buffer, 0, minSize);
for (short s : buffer) {
if (s>1000)
System.out.println("signalVal=" + s);
}
}
Log.d("Finished","Reording");
ar.stop();
Thank you
You can use AudioManager.isWiredHeadsetOn() for checking if the headset are plugged in or not. If the above value is false dont perform any action or whatever you want to do. And also you need permission first: MODIFY_AUDIO_SETTINGS
Hope this helps. :)
I had this problem in reverse (trying to force use of the phone's mic instead of the headphone mic). You can choose a mic by scanning the AudioDeviceInfo array in AudioManager. Here's what I think it would look like for you (if TYPE_LINE_ANALOG doesn't work, check out the AudioDeviceInfo page for more possibilities or debug what devices come up):
AudioRecord audioRecord =
new AudioRecord(...);
// Force use of the line in mic
AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
for ( AudioDeviceInfo device : audioManager.getDevices(AudioManager.GET_DEVICES_INPUTS)) {
if ( device.getType() == AudioDeviceInfo.TYPE_LINE_ANALOG) {
audioRecord.setPreferredDevice(device);
break;
}
}
I am working on a game application. But there is a problem on volume control. I want to change media player volume using a seekBar, and not system media volume. Is there any solution for change media player volume via seekBar.
Thanks in advance.
First, get a reference from AudioManager;
AudioManager audioMan = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
To raise the volume:
audioMan.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_RAISE, AudioManager.FLAG_VIBRATE | AudioManager.FLAG_PLAY_SOUND | AudioManager.FLAG_SHOW_UI);
To low the volume:
audioMan.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_LOWER, AudioManager.FLAG_VIBRATE | AudioManager.FLAG_PLAY_SOUND | AudioManager.FLAG_SHOW_UI);
To get the max volume:
int maxVolume = audioMan.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
To get the current volume:
int currVolume = audioMan.getStreamVolume(AudioManager.STREAM_MUSIC);
You can remove any of the flags that I've included
May be this help...
protected static void setVolume(int volume) {
currentVolume = volume;
{
if (volume == 1) {
volume = 2;
}
try {
float vol = ((float) volume / CONSTANT.SYSTEM_MAX_VOLUME);
mediaPlayer.setVolume(vol, vol);
} catch (Exception e) {
e.printStackTrace();
}
}
}
I play a sound using:
public class NotificationFunction implements FREFunction {
public FREObject call(FREContext context, FREObject[] args) {
Context appContext = context.getActivity().getApplicationContext();
AudioManager mAudioManager = (AudioManager)
appContext.getSystemService(Context.AUDIO_SERVICE);
mAudioManager.loadSoundEffects();
mAudioManager.playSoundEffect(0);
It plays a default sound effect, how can I get it to play a custom sound effect.
Also I have tried to implement sound pool but it doesnt work, I implemented it the standard way but it doesnt work. Any ideas why? Or if I can use the audio manager for sounds instead?
Check with following code
using (AudioManager am= (AudioManager)WebViewActivity.Instance.GetSystemService(Context.AudioService))
{
int maxVol = am.GetStreamMaxVolume(Stream.Music);
float myVol= maxVol * volume;
am.SetStreamVolume(Stream.Music, (int)(myVol), 0);
using (SoundPool soundPool = new SoundPool(1, Stream.Music, 0))
{
int soundFileId = soundPool.Load(soundFilePath, 1);
soundPool.LoadComplete += (sender, eventArgs) =>
{
using (SoundPool soundPoolLoaded = sender as SoundPool)
{
soundPoolLoaded.Play(soundFileId, myVol,
myVol, 0, 0, 1.0f);
}
};
}
}
I currently have code that reads a recording in from the devices mic using the AudioRecord class and then playing it back out using the AudioTrack class.
My problem is that when I play it out it plays via the speaker phone.
I want it to play out via the ear piece on the device.
Here is my code:
public class LoopProg extends Activity {
boolean isRecording; //currently not used
AudioManager am;
int count = 0;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
am.setMicrophoneMute(true);
while(count <= 1000000){
Record record = new Record();
record.run();
count ++;
Log.d("COUNT", "Count is : " + count);
}
}
public class Record extends Thread{
static final int bufferSize = 200000;
final short[] buffer = new short[bufferSize];
short[] readBuffer = new short[bufferSize];
public void run() {
isRecording = true;
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
int buffersize = AudioRecord.getMinBufferSize(11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);
AudioRecord arec = new AudioRecord(MediaRecorder.AudioSource.MIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize);
AudioTrack atrack = new AudioTrack(AudioManager.STREAM_MUSIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize, AudioTrack.MODE_STREAM);
am.setRouting(AudioManager.MODE_NORMAL,1, AudioManager.STREAM_MUSIC);
int ok = am.getRouting(AudioManager.ROUTE_EARPIECE);
Log.d("ROUTING", "getRouting = " + ok);
setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
//am.setSpeakerphoneOn(true);
Log.d("SPEAKERPHONE", "Is speakerphone on? : " + am.isSpeakerphoneOn());
am.setSpeakerphoneOn(false);
Log.d("SPEAKERPHONE", "Is speakerphone on? : " + am.isSpeakerphoneOn());
atrack.setPlaybackRate(11025);
byte[] buffer = new byte[buffersize];
arec.startRecording();
atrack.play();
while(isRecording) {
arec.read(buffer, 0, buffersize);
atrack.write(buffer, 0, buffer.length);
}
arec.stop();
atrack.stop();
isRecording = false;
}
}
}
As you can see if the code I have tried using the AudioManager class and its methods including the deprecated setRouting method and nothing works, the setSpeakerphoneOn method seems to have no effect at all, neither does the routing method.
Has anyone got any ideas on how to get it to play via the earpiece instead of the spaker phone?
Just got it to work on 2.2. I still needed the In_Call setup which I don't really like but I'll deal with it for now. I was able to ditch the call routing stuff which is deprecated now. I found you definitely need the Modify_Audio_Settings permission, no error without it but it the setSpeakerPhone method just does nothing. Here is the mock up of the code I used.
private AudioManager m_amAudioManager;
m_amAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
m_amAudioManager.setMode(AudioManager.MODE_IN_CALL);
m_amAudioManager.setSpeakerphoneOn(false);
Please use this code, works well:
//PLAY ON EARPIECE
mPlayer.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);
audioManager.setMode(AudioManager.MODE_IN_CALL);
audioManager.setSpeakerphoneOn(false);
//PLAY ON SPEAKER
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
audioManager.setMode(AudioManager.MODE_IN_CALL);
audioManager.setSpeakerphoneOn(true);
There was some related discussion in this recent question:
Android - can I mute currently playing audio applications?
Based on the AudioManager source code, it seems that you must be in "call mode" before the setSpeakerphoneOn method has any effect.
However, I recently saw an application that could seamlessly switch between earpiece and speakerphone while still showing the current stream as the "media" stream, so I would be interested in any further answers.
Misleaded by some answers here for quite a lot of time. I'm using Android 2.2. "audioManager.setSpeakerphoneOn(false);" is working.
audioManager.setSpeakerphoneOn(false);
...
mediaPlayer.setDataSource(..);
mediaPlayer.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);
mediaPlayer.prepare();
public MediaPlayer m_mpSpeakerPlayer;
private AudioManager m_amAudioManager;
m_amAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
// 從Receiver Earpiece發音
m_amAudioManager.setSpeakerphoneOn(false);
m_amAudioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_EARPIECE, AudioManager.ROUTE_ALL);
Log.i(TAG, String.valueOf(m_amAudioManager.getRouting(AudioManager.ROUTE_EARPIECE)));
setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
// 把聲音設定成從Earpiece出來
// 重點在這行，要把它設定為正在通話中
m_amAudioManager.setMode(AudioManager.MODE_IN_CALL);
// 開始放音樂
m_mpSpeakerPlayer.reset();
m_mpSpeakerPlayer.setDataSource("sdcard/receiver.mp3");
m_mpSpeakerPlayer.prepare();
m_mpSpeakerPlayer.start();
//最後再把它設定從Speaker放音，達成！
m_amAudioManager.setMode(AudioManager.MODE_NORMAL);
I appear to have got it working on 1.6.
So I said I'd post here how I done it.
To get it working in 1.6 I:
Used the AudioManager class to set setSpeakerphoneOn(false), I then used the Voice_Call_Stream and add volume control to the Voice_Call_Stream.
The setSpeakerphoneOn(false) method is used in onCreate() of the activity and this appears to route to the headset, I then used a button and used the setSpeakerphoneOn(true) method and the audio gets routed to the speaker.
The method only appears to work when it is used in onCreate() for me and I haven't tested it extensively but for the moment it allows me to switch between headset and speaker on a 1.6 device
now in 2022 in Android S (12, API31) setSpeakerphoneOn(false) isn't working reliablie, it is in fact deprecated! instead we can use new API and setCommunicationDevice(AudioDeviceInfo) method. (works with AudioManager.STREAM_VOICE_CALL)
some sample
Boolean result = null;
ArrayList<Integer> targetTypes = new ArrayList<>();
if (earpieceMode) {
targetTypes.add(AudioDeviceInfo.TYPE_BUILTIN_EARPIECE);
} else { // play out loud
targetTypes.add(AudioDeviceInfo.TYPE_BUILTIN_SPEAKER);
}
AudioDeviceInfo currentDevice = audioManager.getCommunicationDevice();
if (currentDevice!=null) {
for (Integer targetType : targetTypes) {
if (targetType == currentDevice.getType()) {
Log.i("AUDIO_MANAGER", "setCommunicationDevice targetType ALREADY SET UP!!");
result = true;
break;
}
}
}
if (result == null) {
List<AudioDeviceInfo> devices = audioManager.getAvailableCommunicationDevices();
outer:
for (Integer targetType : targetTypes) {
for (AudioDeviceInfo device : devices) {
if (device.getType() == targetType) {
result = audioManager.setCommunicationDevice(device);
Log.i("AUDIO_MANAGER", "setCommunicationDevice type:" + targetType + " result:" + result);
if (result) break outer;
}
}
}
}
if (result == null) {
Log.i("AUDIO_MANAGER", "setCommunicationDevice targetType NOT FOUND!!");
}
else if (!result) {
Log.i("AUDIO_MANAGER", "setCommunicationDevice targetType FAILED TO SET!!");
}
If the ear piece is connected to the phone with bluetooth (which I assume it is), have you tried calling AudioManager.setBluetoothScoOn(true)?
I've been through the Android reference and this is the only thing I could find that you didn't mention trying.