问题
I am using this link to record voice when there is any incoming call. Link Url
this approach works fine with all device except when i run this code on Samsung S7, S8 and Gionee A1
The voice of the other side is not getting recorded.
回答1:
Please use this code below to achieve this it works well on all devices.
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.security.KeyPairGenerator;
//import java.security.KeyPair;
//import java.security.Key;
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/callrecorder";
private static final int RECORDING_NOTIFICATION_ID = 1;
private MediaRecorder recorder = null;
private boolean isRecording = false;
private File recording = null;;
/*
private static void test() throws java.security.NoSuchAlgorithmException
{
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
kpg.initialize(2048);
KeyPair kp = kpg.genKeyPair();
Key publicKey = kp.getPublic();
Key privateKey = kp.getPrivate();
}
*/
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-SS");
String prefix = sdf.format(new Date());
// add info to file name about what audio channel we were recording
int audiosource = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_SOURCE, "1"));
prefix += "-channel" + audiosource + "-";
// create suffix based on format
String suffix = "";
int audioformat = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_FORMAT, "1"));
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::onStart calling through to onStartCommand");
//onStartCommand(intent, 0, startId);
//}
//public int onStartCommand(Intent intent, int flags, 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;
}
int audiosource = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_SOURCE, "1"));
int audioformat = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_FORMAT, "1"));
recording = makeOutputFile(prefs);
if (recording == null) {
recorder = null;
return; //return 0;
}
Log.i("CallRecorder", "RecordService will config MediaRecorder with audiosource: " + audiosource + " audioformat: " + audioformat);
try {
// These calls will throw exceptions unless you set the
// android.permission.RECORD_AUDIO permission for your app
recorder.reset();
recorder.setAudioSource(audiosource);
Log.d("CallRecorder", "set audiosource " + audiosource);
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();
/*
// encrypt the recording
String keyfile = "/sdcard/keyring";
try {
//PGPPublicKey k = readPublicKey(new FileInputStream(keyfile));
test();
} catch (java.security.NoSuchAlgorithmException e) {
Log.e("CallRecorder", "RecordService::onDestroy crypto test failed: ", e);
}
//encrypt(recording);
*/
}
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();
}
}
Ref.-> https://github.com/esnyder/callrecorder
来源：https://stackoverflow.com/questions/47751462/incoming-voice-not-getting-recorded-in-samsung-s7-s8-and-gionee-a1