我使用AudioRecord录制一些音频。为了初始化AudioRecord对象,你必须提供几个参数,例如(速率,通道,编码),并且由于硬件设备支持不同的参数组合,我继续检查功能性应用程序,如
Ringdroid: Audio recording done in Ringdroid
和Rehersal助手: Audio recording in Rehersal Assistant
正如AudioRecord类的文档中所提到的,始终有效的配置是rate = 44100和channel = CHANNEL_IN_MONO。
我在初始化我的AudioRecord对象时使用相同的参数但是仍然遇到运行时错误,说我的对象未初始化。由于RingDroind在我的设备(Nexus 5)上工作正常,因此我在创建AudioObject时使用了相同的配置。
package com.example.android.visualizeaudio;
import android.app.Activity;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
int mSampleRate = 44100;
Button startButton;
boolean started = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startButton = (Button) this.findViewById(R.id.start_button);
}
private void RecordAudio() {
int minBufferSize = AudioRecord.getMinBufferSize(
mSampleRate, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
// make sure minBufferSize can contain at least 1 second of audio (16 bits sample).
if (minBufferSize < mSampleRate * 2) {
minBufferSize = mSampleRate * 2;
}
AudioRecord audioRecord = new AudioRecord(
MediaRecorder.AudioSource.MIC,
mSampleRate,
AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT,
minBufferSize
);
audioRecord.startRecording();
//Do some stuff here with the recorded data
audioRecord.stop();
audioRecord.release();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
public void startRec(View view) {
if (started) {
started = false;
startButton.setText("Start");
} else {
started = true;
startButton.setText("Stop");
Toast.makeText(this, "Recording started", Toast.LENGTH_LONG);
RecordAudio();
}
}
}
谢谢
答案 0 :(得分:0)
切换到SDK目标版本22就成了伎俩。使用目标SDK 23,我遇到了这些错误。我不知道为什么,但似乎我试图访问的资源被操作系统使用。