I looked over the code and didn't see anything obvious. You won't see
anything in the log unless an error occurs - we try to minimize
logging in production code.
Run adb bugreport and take a look at the kernel log. You should see
something like this:
<6>[ 820.265000] adsp: opening module AUDPREPROCTASK
<6>[ 820.265488] audmgr_rpc_thread() start
<6>[ 820.266281] adsp: module AUDPREPROCTASK has been registered
<6>[ 820.266586] adsp: opening module AUDRECTASK
<6>[ 820.267838] adsp: module AUDRECTASK has been registered
<6>[ 820.268326] snd_set_device 256 1 0
<6>[ 820.280289] audmgr: rpc_reply status 0
<6>[ 820.291489] audmgr: rpc READY handle=0x00000000
<6>[ 820.355332] audmgr: rpc CODEC_CONFIG volume=0x00002ff4
<6>[ 820.355759] msm_adsp_enable() 'AUDPREPROCTASK'
<6>[ 820.357468] adsp: rpc event=0, proc_id=2, module=14, image=0
<6>[ 820.357926] adsp: module AUDPREPROCTASK: READY
<6>[ 820.358688] msm_adsp_enable() 'AUDRECTASK'
<6>[ 820.359909] adsp: rpc event=0, proc_id=2, module=13, image=0
<6>[ 820.360825] adsp: module AUDRECTASK: READY
<6>[ 820.362259] audpre: CFG ENABLED
<6>[ 820.363663] audrec: PARAM CFG DONE
<6>[ 822.417343] audrec: CFG SLEEP
<6>[ 822.417801] msm_adsp_disable() 'AUDRECTASK'
<6>[ 822.420151] msm_adsp_disable() 'AUDPREPROCTASK'
<6>[ 822.423081] adsp: closing module AUDRECTASK
<6>[ 822.423508] adsp: closing module AUDPREPROCTASK
<6>[ 822.423843] adsp: disable interrupt
<6>[ 822.424667] snd_set_device 256 1 1
<6>[ 822.428391] audmgr: rpc_reply status 0
<3>[ 822.458450] audmgr: DISABLED
If so, then we know that the audio input driver is being opened
correctly.
On Feb 11, 7:02 am, michael <kuh...@gmail.com> wrote:
> Hi,
>
> I've written a little program (see below) to record audio using
> MediaRecorder. While everything works fine in the emulator (SDK1r2),
> the program does not work on the real phone (HTC G1). On the phone,
> after pressing the start button, the audio file is created, but no
> content is written to it (i.e. the file size remains 0). Also, no
> exception is shown in logcat, and no AudioStreamInGeneric events are
> generated (such events are generated when running the program on the
> emulator).
>
> Is there maybe a setting on the phone that I have to turn on (or off)?
> Or am I missing something else?
>
> I've set the permission to record audio in the android-manifest.xml
> file using
> <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-
> permission>
>
> Thanks for any help!
>
> Michael
> ------------------------------
> My program code:
>
> package ch.ethz.dcg.mictest;
>
> import android.app.Activity;
> import android.media.MediaRecorder;
> import android.os.Bundle;
> import android.util.Log;
> import android.view.View;
> import android.widget.Button;
>
> public class MicTest extends Activity {
>
> private final static String TAG = MicTest.class.getSimpleName();
>
> private MediaRecorder recorder;
> private Button button;
>
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.main);
>
> recorder = new MediaRecorder();
>
> button = (Button)findViewById(R.id.button);
> button.setText("start");
> button.setOnClickListener(new View.OnClickListener() {
> @Override
> public void onClick(View v) {
> buttonClicked();
> }
> });
> }
>
> private void buttonClicked() {
> if (button.getText().equals("start")) {
> try {
> recorder = new MediaRecorder();
> String path = "/sdcard/test.3gpp";
>
>
> recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
>
> recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
>
> recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
> recorder.setOutputFile(path);
>
> recorder.prepare();
> recorder.start();
> button.setText("stop");
> } catch (Exception e) {
> Log.w(TAG, e);
> }
> } else {
> try {
> recorder.stop();
> recorder.release(); // Now the object cannot
> be reused
> button.setEnabled(false);
> } catch (Exception e) {
> Log.w(TAG, e);
> }
> }
> }
>
> }
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