Mega Code Archive
Using AudioRecord
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package app.test;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class Test extends Activity implements OnClickListener {
RecordAudio recordTask;
PlayAudio playTask;
Button startRecordingButton, stopRecordingButton, startPlaybackButton,
stopPlaybackButton;
TextView statusText;
File recordingFile;
boolean isRecording = false,isPlaying = false;
int frequency = 11025,channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
statusText = (TextView) this.findViewById(R.id.StatusTextView);
startRecordingButton = (Button) this
.findViewById(R.id.StartRecordingButton);
stopRecordingButton = (Button) this
.findViewById(R.id.StopRecordingButton);
startPlaybackButton = (Button) this
.findViewById(R.id.StartPlaybackButton);
stopPlaybackButton = (Button) this
.findViewById(R.id.StopPlaybackButton);
startRecordingButton.setOnClickListener(this);
stopRecordingButton.setOnClickListener(this);
startPlaybackButton.setOnClickListener(this);
stopPlaybackButton.setOnClickListener(this);
stopRecordingButton.setEnabled(false);
startPlaybackButton.setEnabled(false);
stopPlaybackButton.setEnabled(false);
File path = new File(
Environment.getExternalStorageDirectory().getAbsolutePath()
+ "/Android/data/com.apress.proandroidmedia.ch07.altaudiorecorder/files/");
path.mkdirs();
try {
recordingFile = File.createTempFile("recording", ".pcm", path);
} catch (IOException e) {
throw new RuntimeException("Couldn't create file on SD card", e);
}
}
public void onClick(View v) {
if (v == startRecordingButton) {
record();
} else if (v == stopRecordingButton) {
stopRecording();
} else if (v == startPlaybackButton) {
play();
} else if (v == stopPlaybackButton) {
stopPlaying();
}
}
public void play() {
startPlaybackButton.setEnabled(true);
playTask = new PlayAudio();
playTask.execute();
stopPlaybackButton.setEnabled(true);
}
public void stopPlaying() {
isPlaying = false;
stopPlaybackButton.setEnabled(false);
startPlaybackButton.setEnabled(true);
}
public void record() {
startRecordingButton.setEnabled(false);
stopRecordingButton.setEnabled(true);
startPlaybackButton.setEnabled(true);
recordTask = new RecordAudio();
recordTask.execute();
}
public void stopRecording() {
isRecording = false;
}
private class PlayAudio extends AsyncTask<Void, Integer, Void> {
@Override
protected Void doInBackground(Void... params) {
isPlaying = true;
int bufferSize = AudioTrack.getMinBufferSize(frequency,channelConfiguration, audioEncoding);
short[] audiodata = new short[bufferSize / 4];
try {
DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(recordingFile)));
AudioTrack audioTrack = new AudioTrack(
AudioManager.STREAM_MUSIC, frequency,
channelConfiguration, audioEncoding, bufferSize,
AudioTrack.MODE_STREAM);
audioTrack.play();
while (isPlaying && dis.available() > 0) {
int i = 0;
while (dis.available() > 0 && i < audiodata.length) {
audiodata[i] = dis.readShort();
i++;
}
audioTrack.write(audiodata, 0, audiodata.length);
}
dis.close();
startPlaybackButton.setEnabled(false);
stopPlaybackButton.setEnabled(true);
} catch (Throwable t) {
Log.e("AudioTrack", "Playback Failed");
}
return null;
}
}
private class RecordAudio extends AsyncTask<Void, Integer, Void> {
@Override
protected Void doInBackground(Void... params) {
isRecording = true;
try {
DataOutputStream dos = new DataOutputStream(
new BufferedOutputStream(new FileOutputStream(
recordingFile)));
int bufferSize = AudioRecord.getMinBufferSize(frequency,
channelConfiguration, audioEncoding);
AudioRecord audioRecord = new AudioRecord(
MediaRecorder.AudioSource.MIC, frequency,
channelConfiguration, audioEncoding, bufferSize);
short[] buffer = new short[bufferSize];
audioRecord.startRecording();
int r = 0;
while (isRecording) {
int bufferReadResult = audioRecord.read(buffer, 0,
bufferSize);
for (int i = 0; i < bufferReadResult; i++) {
dos.writeShort(buffer[i]);
}
publishProgress(new Integer(r));
r++;
}
audioRecord.stop();
dos.close();
} catch (Throwable t) {
Log.e("AudioRecord", "Recording Failed");
}
return null;
}
protected void onProgressUpdate(Integer... progress) {
statusText.setText(progress[0].toString());
}
protected void onPostExecute(Void result) {
startRecordingButton.setEnabled(true);
stopRecordingButton.setEnabled(false);
startPlaybackButton.setEnabled(true);
}
}
}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Status" android:id="@+id/StatusTextView"/>
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Start Recording" android:id="@+id/StartRecordingButton"></Button>
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Stop Recording" android:id="@+id/StopRecordingButton"></Button>
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Start Playback" android:id="@+id/StartPlaybackButton"></Button>
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Stop Playback" android:id="@+id/StopPlaybackButton"></Button>
</LinearLayout>
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