我試圖通過(guò)創(chuàng)建一個(gè)android應(yīng)用程序來(lái)錄制聲音。 這里是代碼：使用android模擬器錄制聲音

這是輔助類

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();

}

}

，這是我的活動(dòng)：

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();

}

}

當(dāng)我運(yùn)行代碼，我得到以下異常：

java.io.IOException：未安裝SD卡。它被刪除。

我該如何解決這個(gè)問(wèn)題？

總結(jié)

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