Android AAudio支持实时录音。AAudio是Android平台上的一个音频API,它在Android 10中被引入,旨在提供低延迟、高保真度的音频处理能力。AAudio特别适用于需要实时音频处理的场景,如语音识别、实时音频处理、游戏音效等。
使用AAudio进行实时录音时,需要注意以下几点:
下面是一个简单的AAudio实时录音示例代码:
import android.Manifest;
import android.content.pm.PackageManager;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
public class MainActivity extends AppCompatActivity {
private static final int SAMPLE_RATE_IN_HZ = 44100;
private static final int CHANNEL_CONFIG = AudioFormat.CHANNEL_IN_MONO;
private static final int AUDIO_FORMAT = AudioFormat.ENCODING_PCM_16BIT;
private static final int BUFFER_SIZE_IN_BYTES = AudioRecord.getMinBufferSize(SAMPLE_RATE_IN_HZ, CHANNEL_CONFIG, AUDIO_FORMAT);
private AudioRecord audioRecord;
private HandlerThread handlerThread;
private Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 检查录音权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, 1);
} else {
startRecording();
}
}
private void startRecording() {
handlerThread = new HandlerThread("AudioRecordThread");
handlerThread.start();
handler = new Handler(handlerThread.getLooper());
audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLE_RATE_IN_HZ, CHANNEL_CONFIG, AUDIO_FORMAT, BUFFER_SIZE_IN_BYTES);
if (audioRecord.getState() != AudioRecord.STATE_INITIALIZED) {
// 初始化失败,处理错误
} else {
audioRecord.startRecording();
handler.postDelayed(new Runnable() {
@Override
public void run() {
// 录音结束,处理音频数据
audioRecord.stop();
}
}, 10000); // 延迟10秒后停止录音
}
}
}
请注意,这只是一个简单的示例代码,实际应用中可能需要根据具体需求进行调整。同时,为了确保音频数据的实时处理,建议在单独的线程中进行音频录制和播放操作。