このコードを使用して、 AudioTrackとAudioRecordを使用して、録音したオーディオをリアルタイムで録音および再生します。
package com.example.audiotrack;
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.Bundle;
import android.util.Log;
public class MainActivity extends Activity {
private int freq = 8000;
private AudioRecord audioRecord = null;
private Thread Rthread = null;
private AudioManager audioManager = null;
private AudioTrack audioTrack = null;
byte[] buffer = new byte[freq];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
final int bufferSize = AudioRecord.getMinBufferSize(freq,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT);
audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, freq,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
MediaRecorder.AudioEncoder.AMR_NB, bufferSize);
audioTrack = new AudioTrack(AudioManager.ROUTE_HEADSET, freq,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
MediaRecorder.AudioEncoder.AMR_NB, bufferSize,
AudioTrack.MODE_STREAM);
audioTrack.setPlaybackRate(freq);
final byte[] buffer = new byte[bufferSize];
audioRecord.startRecording();
Log.i("info", "Audio Recording started");
audioTrack.play();
Log.i("info", "Audio Playing started");
Rthread = new Thread(new Runnable() {
public void run() {
while (true) {
try {
audioRecord.read(buffer, 0, bufferSize);
audioTrack.write(buffer, 0, buffer.length);
} catch (Throwable t) {
Log.e("Error", "Read write failed");
t.printStackTrace();
}
}
}
});
Rthread.start();
}
}
私の問題 :
1.音質が悪い
2.異なる周波数を試すと、アプリがクラッシュします