我正在尝试通过创建一个Android应用程序来录制声音。
这是代码：
这是助手类
package com.recorder;
import java.io.File;
import java.io.IOException;
import android.media.MediaRecorder;
import android.os.Environment;
public class AudioRecorder {
final MediaRecorder recorder = new MediaRecorder();
final String path;
/**
* Creates a new audio recording at the given path (relative to root of SD card).
*/
public AudioRecorder(String path) {
this.path = sanitizePath(path);
}
private String sanitizePath(String path) {
if (!path.startsWith("/")) {
path = "/" + path;
}
if (!path.contains(".")) {
path += ".3gp";
}
return Environment.getDataDirectory().getAbsolutePath() + path;
}
public void start() throws IOException {
String state = android.os.Environment.getExternalStorageState();
if(!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
throw new IOException("SD Card is not mounted. It is " + state + ".");
}
// make sure the directory we plan to store the recording in exists
File directory = new File(path).getParentFile();
if (!directory.exists() && !directory.mkdirs()) {
throw new IOException("Path to file could not be created.");
}
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(path);
recorder.prepare();
recorder.start();
}
/**
* Stops a recording that has been previously started.
*/
public void stop() throws IOException {
recorder.stop();
recorder.release();
}
}
这是我的活动：
package com.recorder;
import java.io.IOException;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.ImageButton;
import android.widget.Toast;
public class RecorderActivity extends Activity {
MediaPlayer mp=new MediaPlayer();
ImageButton mic;
private AudioRecorder recorder;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
recorder = new AudioRecorder("/Mysounds1");//here is the path
//to sdcard where we will save the recording
}
// Action listener for a button which record sound
public void mic(View view){
Toast.makeText(this,"Recording started...",Toast.LENGTH_LONG).show();
try {
recorder.start();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
当我运行代码时，我得到以下异常：
java.io.IOException：未安装SD卡。它已删除。
我该如何解决这个问题？