Android audio recording, part 1

HI!
I was really happy to read what you post on this website.
I really wonder that I could make an app that records voice call
with my voice and the others’.
when I use those methods, I just can record my voice not
the others’
Could you help me with this code?

public class RecordingAudioActivity extends Activity {
private static final String AUDIO_RECORDER_FILE_EXT_3GP = “.3gp”;
private static final String AUDIO_RECORDER_FILE_EXT_MP4 = “.mp4″;
private static final String AUDIO_RECORDER_FILE_EXT_AMR = “.amr”;
private static final String AUDIO_RECORDER_FOLDER = “AudioRecorder”;
private Context context;
private MediaRecorder recorder = null;
private int currentFormat = 0;
private int output_formats[] = { MediaRecorder.OutputFormat.MPEG_4, MediaRecorder.OutputFormat.THREE_GPP };
private String file_exts[] = { AUDIO_RECORDER_FILE_EXT_MP4, AUDIO_RECORDER_FILE_EXT_3GP, AUDIO_RECORDER_FILE_EXT_AMR};
AudioManager audiomanager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
context = getApplicationContext();
audiomanager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);

setButtonHandlers();
enableButtons(false);
setFormatButtonCaption();
}

private void setButtonHandlers() {
((Button)findViewById(R.id.btnStart)).setOnClickListener(btnClick);
((Button)findViewById(R.id.btnStop)).setOnClickListener(btnClick);
((Button)findViewById(R.id.btnFormat)).setOnClickListener(btnClick);
}

private void enableButton(int id,boolean isEnable){
((Button)findViewById(id)).setEnabled(isEnable);
}

private void enableButtons(boolean isRecording) {
enableButton(R.id.btnStart,!isRecording);
enableButton(R.id.btnFormat,!isRecording);
enableButton(R.id.btnStop,isRecording);
}

private void setFormatButtonCaption(){
((Button)findViewById(R.id.btnFormat)).setText(getString(R.string.audio_format) + ” (” + file_exts[currentFormat] + “)”);
}

private String getFilename(){
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath,AUDIO_RECORDER_FOLDER);

if(!file.exists()){
file.mkdirs();
}

return (file.getAbsolutePath() + “/” + System.currentTimeMillis() + file_exts[currentFormat]);
}

private void startRecording(){
recorder = new MediaRecorder();

recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_DOWNLINK | MediaRecorder.AudioSource.VOICE_UPLINK);
//recorder.setOutputFormat(output_formats[currentFormat]);
recorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(getFilename());
//recorder.setAudioChannels(1);
//recorder.setAudioSamplingRate(44100);
//audiomanager.setSpeakerphoneOn(true);
recorder.setOnErrorListener(errorListener);
recorder.setOnInfoListener(infoListener);

try {
recorder.prepare();
recorder.start();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

private void stopRecording(){
if(null != recorder){
recorder.stop();
recorder.reset();
recorder.release();

recorder = null;
}
}

private void displayFormatDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
String formats[] = {“MPEG 4″, “3GPP”, “AMR”};

builder.setTitle(getString(R.string.choose_format_title))
.setSingleChoiceItems(formats, currentFormat, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
currentFormat = which;
setFormatButtonCaption();

dialog.dismiss();
}
})
.show();
}

private MediaRecorder.OnErrorListener errorListener = new MediaRecorder.OnErrorListener() {
@Override
public void onError(MediaRecorder mr, int what, int extra) {

}
};

private MediaRecorder.OnInfoListener infoListener = new MediaRecorder.OnInfoListener() {
@Override
public void onInfo(MediaRecorder mr, int what, int extra) {

}
};

private View.OnClickListener btnClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.btnStart:{

enableButtons(true);
startRecording();

break;
}
case R.id.btnStop:{

enableButtons(false);
stopRecording();

break;
}
case R.id.btnFormat:{
displayFormatDialog();

break;
}
}
}
};
}

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Hello to all of you.
I create my android application of streaming Radio.Now i am trying to record this streaming radio audio but i don’t know how it is done.which audio source i set instead of recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
So can any help me?

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Hello, can i start recording audio using Proximity Sensors? I mean when i bring my cell near mouth, it should start recording and after a certain time, it should stop? is it possible? I have found an option set max. duration for recording.. how can i do it? thanx in advance..

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hii is dr a way fr me to stream this captured audio real time instead of recording

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thks
its really helpful for me

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Hi, I have a little problem with the MediaRecorder.Start() statement.
I’m develop a small application to record a call, but, when start to record the app stock in this state and I have to shut down the AVD, obviously, the file has no data.
This is the code of my application.

https://gist.github.com/1829663

PS: Very great site…goes to favorite bar

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