Android：如何将录制的音频存储在SD卡中

Question

我正在尝试使用以下代码记录音频。

public static final int CAPTURE_AUDIO = 0;
      ....
      ....

在按钮上单击我有以下代码。

Intent intent = new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
startActivityForResult(intent,CAPTURE_AUDIO);

因此，它将打开默认音频播放器并录制音频并将其存储在SD卡默认录制文件夹中。

所以一切都很好，但问题是我只想将此录音存储在SD卡中，但要使用其他名称和其他文件夹中的内容

文件夹的名称是AudioRecording ，录音的名称是audio.mp3，所以我该怎么做。

我尝试了一些解决方案，但对我不起作用。 我知道这是一件容易的事，但有些我无法弄清楚。 任何建议将不胜感激..预先感谢您。

Answer 1

在这里，我添加了呼叫记录器示例源代码。 请尝试让我知道。

RecordService.java

import java.io.File;
import java.io.IOException;
import java.lang.Exception;
import java.util.Date;
import java.text.SimpleDateFormat;
import android.os.IBinder;
import android.app.Service;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.preference.PreferenceManager;
import android.content.SharedPreferences;
import android.content.Context;
import android.content.Intent;
import android.media.MediaRecorder;
import android.widget.Toast;
import android.util.Log;
import java.io.InputStream;
import java.io.FileInputStream;
import java.util.Iterator;

public class RecordService 
extends Service
implements MediaRecorder.OnInfoListener, MediaRecorder.OnErrorListener
{
private static final String TAG = "CallRecorder";

public static final String DEFAULT_STORAGE_LOCATION = "/sdcard/AudioRecording";
private static final int RECORDING_NOTIFICATION_ID = 1;
private MediaRecorder recorder = null;
private boolean isRecording = false;
private File recording = null;;
private final int audioformat = 3;


private File makeOutputFile (SharedPreferences prefs)
{
File dir = new File(DEFAULT_STORAGE_LOCATION);

// test dir for existence and writeability
if (!dir.exists()) {
    try {
        dir.mkdirs();
    } catch (Exception e) {
        Log.e("CallRecorder", "RecordService::makeOutputFile unable to create directory " + dir + ": " + e);
        Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to create the directory " + dir + " to store recordings: " + e, Toast.LENGTH_LONG);
        t.show();
        return null;
    }
} else {
    if (!dir.canWrite()) {
        Log.e(TAG, "RecordService::makeOutputFile does not have write permission for directory: " + dir);
        Toast t = Toast.makeText(getApplicationContext(), "CallRecorder does not have write permission for the directory directory " + dir + " to store recordings", Toast.LENGTH_LONG);
        t.show();
        return null;
    }
}

// test size

// create filename based on call data
String prefix = "call";
//SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd_HH:MM:SS");
//prefix = sdf.format(new Date()) + "-callrecording";

// add info to file name about what audio channel we were recording
prefix += "-channel" + 1 + "-";

// create suffix based on format
String suffix = "";
switch (audioformat) {
case MediaRecorder.OutputFormat.THREE_GPP:
    suffix = ".3gpp";
    break;
case MediaRecorder.OutputFormat.MPEG_4:
    suffix = ".mpg";
    break;
case MediaRecorder.OutputFormat.RAW_AMR:
    suffix = ".amr";
    break;
}

try {
    return File.createTempFile(prefix, suffix, dir);
} catch (IOException e) {
    Log.e("CallRecorder", "RecordService::makeOutputFile unable to create temp file in " + dir + ": " + e);
    Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to create temp file in " + dir + ": " + e, Toast.LENGTH_LONG);
    t.show();
    return null;
}
}

public void onCreate()
{
super.onCreate();
recorder = new MediaRecorder();
Log.i("CallRecorder", "onCreate created MediaRecorder object");
}

public void onStart(Intent intent, int startId) {
Log.i("CallRecorder", "RecordService::onStartCommand called while isRecording:" + isRecording);

if (isRecording) return;

Context c = getApplicationContext();
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(c);

Boolean shouldRecord = prefs.getBoolean(Preferences.PREF_RECORD_CALLS, false);
if (!shouldRecord) {
    Log.i("CallRecord", "RecordService::onStartCommand with PREF_RECORD_CALLS false, not recording");
    //return START_STICKY;
    return;
}
recording = makeOutputFile(prefs);
if (recording == null) {
    recorder = null;
    return; //return 0;
}

   try {
    // These calls will throw exceptions unless you set the 
    // android.permission.RECORD_AUDIO permission for your app
    recorder.reset();
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    recorder.setOutputFormat(audioformat);
    Log.d("CallRecorder", "set output " + audioformat);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
    Log.d("CallRecorder", "set encoder default");
    recorder.setOutputFile(recording.getAbsolutePath());
    Log.d("CallRecorder", "set file: " + recording);
    //recorder.setMaxDuration(msDuration); //1000); // 1 seconds
    //recorder.setMaxFileSize(bytesMax); //1024*1024); // 1KB

    recorder.setOnInfoListener(this);
    recorder.setOnErrorListener(this);

    try {
        recorder.prepare();
    } catch (java.io.IOException e) {
        Log.e("CallRecorder", "RecordService::onStart() IOException attempting recorder.prepare()\n");
        Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to start recording: " + e, Toast.LENGTH_LONG);
        t.show();
        recorder = null;
        return; //return 0; //START_STICKY;
    }
    Log.d("CallRecorder", "recorder.prepare() returned");

    recorder.start();
    isRecording = true;
    Log.i("CallRecorder", "recorder.start() returned");
    updateNotification(true);
} catch (java.lang.Exception e) {
    Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to start recording: " + e, Toast.LENGTH_LONG);
    t.show();

    Log.e("CallRecorder", "RecordService::onStart caught unexpected exception", e);
    recorder = null;
}

return; //return 0; //return START_STICKY;
}

public void onDestroy()
{
super.onDestroy();

if (null != recorder) {
    Log.i("CallRecorder", "RecordService::onDestroy calling recorder.release()");
    isRecording = false;
    recorder.release();
    Toast t = Toast.makeText(getApplicationContext(), "CallRecorder finished recording call to " + recording, Toast.LENGTH_LONG);
    t.show();
}

updateNotification(false);
}


// methods to handle binding the service

public IBinder onBind(Intent intent)
{
return null;
}

public boolean onUnbind(Intent intent)
{
return false;
}

public void onRebind(Intent intent)
{
}


private void updateNotification(Boolean status)
{
Context c = getApplicationContext();
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(c);

String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

if (status) {
    int icon = R.drawable.rec;
    CharSequence tickerText = "Recording call from channel " + prefs.getString(Preferences.PREF_AUDIO_SOURCE, "1");
    long when = System.currentTimeMillis();

    Notification notification = new Notification(icon, tickerText, when);

    Context context = getApplicationContext();
    CharSequence contentTitle = "CallRecorder Status";
    CharSequence contentText = "Recording call from channel...";
    Intent notificationIntent = new Intent(this, RecordService.class);
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

    notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
    mNotificationManager.notify(RECORDING_NOTIFICATION_ID, notification);
} else {
    mNotificationManager.cancel(RECORDING_NOTIFICATION_ID);
}
}

// MediaRecorder.OnInfoListener
public void onInfo(MediaRecorder mr, int what, int extra)
{
Log.i("CallRecorder", "RecordService got MediaRecorder onInfo callback with what: " + what + " extra: " + extra);
isRecording = false;
}

// MediaRecorder.OnErrorListener
public void onError(MediaRecorder mr, int what, int extra) 
{
Log.e("CallRecorder", "RecordService got MediaRecorder onError callback with what: " + what + " extra: " + extra);
isRecording = false;
mr.release();
}
}

PhoneListener.java

import android.content.Intent;
import android.content.Context;
import android.content.ComponentName;
import android.telephony.TelephonyManager;
import android.telephony.PhoneStateListener;
import android.util.Log;

public class PhoneListener extends PhoneStateListener
{
private Context context;

public PhoneListener(Context c) {
Log.i("CallRecorder", "PhoneListener constructor");
context = c;
}

public void onCallStateChanged (int state, String incomingNumber)
{
Log.d("CallRecorder", "PhoneListener::onCallStateChanged state:" + state + " incomingNumber:" + incomingNumber);

switch (state) {
case TelephonyManager.CALL_STATE_IDLE:
    Log.d("CallRecorder", "CALL_STATE_IDLE, stoping recording");
    Boolean stopped = context.stopService(new Intent(context, RecordService.class));
    Log.i("CallRecorder", "stopService for RecordService returned " + stopped);
    break;
case TelephonyManager.CALL_STATE_RINGING:
    Log.d("CallRecorder", "CALL_STATE_RINGING");
    break;
case TelephonyManager.CALL_STATE_OFFHOOK:
    Log.d("CallRecorder", "CALL_STATE_OFFHOOK starting recording");
    Intent callIntent = new Intent(context, RecordService.class);
    ComponentName name = context.startService(callIntent);
    if (null == name) {
        Log.e("CallRecorder", "startService for RecordService returned null ComponentName");
    } else {
        Log.i("CallRecorder", "startService returned " + name.flattenToString());
    }
    break;
}
}
}

希望它对您有所帮助，对我来说很好。 请尝试让我知道。 有关更多信息，请下载示例代码表格

电话录音器

Answer 2

我认为实现此目标的最佳方法是将音频转换为byte[]数组。 假设您已经这样做，那么应该可以：

final File soundFile = new File("/sdcard/AudioRecording/");
soundFile.mkdirs();
final File outFile = new File(soundFile, 'audiofile.mp3');

try {
  final FileOutputStream output = new FileOutputStream(outFile);
  output.write(yourByteArrayWithYourAudioFileConverted);
  output.close();
} catch (FileNotFoundException e) {
  e.printStackTrace();
} catch (IOException e) {
  e.printStackTrace();
}

可能不是您的情况，但是如果缺少所有父目录，则mkdirs()方法将尝试构造所有父目录。 在您的情况下，您可能要确保用户具有外部卡，所以这不是必需的（因为根目录是/sdcard ），但是如果您打算将文件存储在更高的目录深度中，则它将自动创建所有层次结构。