Android6.0如何实现双向通话自动录音功能
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具体如下：
项目中需要实现基于Android 6.0 的双向通话自动录音功能，在查阅相关android电话状态监听文章以及Git上的开源录音项目后，整理出此文
首先，实现android 电话状态的监听(来电和去电）
实现手机电话状态的监听，主要依靠两个类：
TelephoneManger和PhoneStateListener
TelephonseManger提供了取得手机基本服务的信息的一种方式。因此应用程序可以使用TelephonyManager来探测手机基本服务的情况。应用程序可以注册listener来监听电话状态的改变。
我们不能对TelephonyManager进行实例化，只能通过获取服务的形式：
Context.getSystemService(Context.TELEPHONY_SERVICE);
注意：对手机的某些信息进行读取是需要一定许可（permission）的。
主要静态成员常量：（它们对应PhoneStateListener.LISTEN_CALL_STATE所监听到的内容）
int CALL_STATE_IDLE //空闲状态，没有任何活动。 int CALL_STATE_OFFHOOK //摘机状态，至少有个电话活动。该活动或是拨打（dialing）或是通话，或是 on hold。并且没有电话是ringing or waiting int CALL_STATE_RINGING //来电状态，电话铃声响起的那段时间或正在通话又来新电，新来电话不得不等待的那段时间。
项目中使用服务来监听通话状态，所以需要弄清楚手机通话状态在广播中的对应值：
EXTRA_STATE_IDLE //它在手机通话状态改变的广播中，用于表示CALL_STATE_IDLE状态，即空闲状态。 EXTRA_STATE_OFFHOOK //它在手机通话状态改变的广播中，用于表示CALL_STATE_OFFHOOK状态，即摘机状态。 EXTRA_STATE_RINGING //它在手机通话状态改变的广播中，用于表示CALL_STATE_RINGING状态，即来电状态 ACTION_PHONE_STATE_CHANGED //在广播中用ACTION_PHONE_STATE_CHANGED这个Action来标示通话状态改变的广播（intent）。 //注：需要许可READ_PHONE_STATE。 String EXTRA_INCOMING_NUMBER //在手机通话状态改变的广播，用于从extra取来电号码。 String EXTRA_STATE //在通话状态改变的广播，用于从extra取来通话状态。
如何实现电话监听呢？
Android在电话状态改变是会发送action为android.intent.action.PHONE_STATE的广播，而拨打电话时会发送action为
public static final String ACTION_NEW_OUTGOING_CALL = "android.intent.action.NEW_OUTGOING_CALL";
的广播。通过自定义广播接收器，接受上述两个广播便可。
下面给出Java代码：(其中的Toast均为方便测试而添加)
package com.example.hgx.phoneinfo60.Recording;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.widget.Toast;
/**
* Created by hgx on 2016/6/13.
*/
public class PhoneCallReceiver extends BroadcastReceiver {
private int lastCallState = TelephonyManager.CALL_STATE_IDLE;
private boolean isIncoming = false;
private static String contactNum;
Intent audioRecorderService;
public PhoneCallReceiver() {
}
@Override
public void onReceive(Context context, Intent intent) {
//如果是去电
if (intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)){
contactNum = intent.getExtras().getString(Intent.EXTRA_PHONE_NUMBER);
}else //android.intent.action.PHONE_STATE.查了下android文档，貌似没有专门用于接收来电的action,所以，非去电即来电.
{
String state = intent.getExtras().getString(TelephonyManager.EXTRA_STATE);
String phoneNumber = intent.getExtras().getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
int stateChange = 0;
if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)){
//空闲状态
stateChange =TelephonyManager.CALL_STATE_IDLE;
if (isIncoming){
onIncomingCallEnded(context,phoneNumber);
}else {
onOutgoingCallEnded(context,phoneNumber);
}
}else if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){
//摘机状态
stateChange = TelephonyManager.CALL_STATE_OFFHOOK;
if (lastCallState != TelephonyManager.CALL_STATE_RINGING){
//如果最近的状态不是来电响铃的话，意味着本次通话是去电
isIncoming =false;
onOutgoingCallStarted(context,phoneNumber);
}else {
//否则本次通话是来电
isIncoming = true;
onIncomingCallAnswered(context, phoneNumber);
}
}else if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)){
//来电响铃状态
stateChange = TelephonyManager.CALL_STATE_RINGING;
lastCallState = stateChange;
onIncomingCallReceived(context,contactNum);
}
}
}
protected void onIncomingCallStarted(Context context,String number){
Toast.makeText(context,"Incoming call is started",Toast.LENGTH_LONG).show();
context.startService(new Intent(context,AudioRecorderService.class));
}
protected void onOutgoingCallStarted(Context context,String number){
Toast.makeText(context, "Outgoing call is started", Toast.LENGTH_LONG).show();
context.startService(new Intent(context, AudioRecorderService.class));
}
protected void onIncomingCallEnded(Context context,String number){
Toast.makeText(context, "Incoming call is ended", Toast.LENGTH_LONG).show();
context.startService(new Intent(context, AudioRecorderService.class));
}
protected void onOutgoingCallEnded(Context context,String number){
Toast.makeText(context, "Outgoing call is ended", Toast.LENGTH_LONG).show();
context.startService(new Intent(context, AudioRecorderService.class));
}
protected void onIncomingCallReceived(Context context,String number){
Toast.makeText(context, "Incoming call is received", Toast.LENGTH_LONG).show();
}
protected void onIncomingCallAnswered(Context context, String number) {
Toast.makeText(context, "Incoming call is answered", Toast.LENGTH_LONG).show();
}
}下面是AudioRecorderService的java实现：
package com.example.hgx.phoneinfo60.Recording;
import android.app.Service;
import android.content.Intent;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.AsyncTask;
import android.os.Environment;
import android.os.IBinder;
import android.provider.MediaStore;
import android.util.Log;
import android.widget.Toast;
import com.example.hgx.phoneinfo60.MyApplication;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* Created by hgx on 2016/6/13.
*/
public class AudioRecorderService extends Service {
private static int RECORD_RATE = 0;
private static int RECORD_BPP = 32;
private static int RECORD_CHANNEL = AudioFormat.CHANNEL_IN_MONO;
private static int RECORD_ENCODER = AudioFormat.ENCODING_PCM_16BIT;
private AudioRecord audioRecorder = null;
private Thread recordT = null;
private Boolean isRecording = false;
private int bufferEle = 1024, bytesPerEle = 2;// want to play 2048 (2K) since 2 bytes we use only 1024 2 bytes in 16bit format
private static int[] recordRate ={44100 , 22050 , 11025 , 8000};
int bufferSize = 0;
File uploadFile;
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
//maintain the relationship between the caller activity and the callee service, currently useless here
return null;
}
@Override
public void onDestroy() {
if (isRecording){
stopRecord();
}else{
Toast.makeText(MyApplication.getContext(), "Recording is already stopped",Toast.LENGTH_SHORT).show();
}
super.onDestroy();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (!isRecording){
startRecord();
}else {
Toast.makeText(MyApplication.getContext(), "Recording is already started",Toast.LENGTH_SHORT).show();
}
return 1;
}
private void startRecord(){
audioRecorder = initializeRecord();
if (audioRecorder != null){
Toast.makeText(MyApplication.getContext(), "Recording is started",Toast.LENGTH_SHORT).show();
audioRecorder.startRecording();
}else
return;
isRecording = true;
recordT = new Thread(new Runnable() {
@Override
public void run() {
writeToFile();
}
},"Recording Thread");
recordT.start();
}
private void writeToFile(){
byte bDate[] = new byte[bufferEle];
FileOutputStream fos =null;
File recordFile = createTempFile();
try {
fos = new FileOutputStream(recordFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
while (isRecording){
audioRecorder.read(bDate,0,bufferEle);
}
try {
fos.write(bDate);
} catch (IOException e) {
e.printStackTrace();
}
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//Following function converts short data to byte data
private byte[] writeShortToByte(short[] sData) {
int size = sData.length;
byte[] byteArrayData = new byte[size * 2];
for (int i = 0; i < size; i++) {
byteArrayData[i * 2] = (byte) (sData[i] & 0x00FF);
byteArrayData[(i * 2) + 1] = (byte) (sData[i] >> 8);
sData[i] = 0;
}
return byteArrayData;
}
//Creates temporary .raw file for recording
private File createTempFile() {
File tempFile = new File(Environment.getExternalStorageDirectory(), "aditi.raw");
return tempFile;
}
//Create file to convert to .wav format
private File createWavFile() {
File wavFile = new File(Environment.getExternalStorageDirectory(), "aditi_" + System.currentTimeMillis() + ".wav");
return wavFile;
}
/*
* Convert raw to wav file
* @param java.io.File temporay raw file
* @param java.io.File destination wav file
* @return void
*
* */
private void convertRawToWavFile(File tempFile, File wavFile) {
FileInputStream fin = null;
FileOutputStream fos = null;
long audioLength = 0;
long dataLength = audioLength + 36;
long sampleRate = RECORD_RATE;
int channel = 1;
long byteRate = RECORD_BPP * RECORD_RATE * channel / 8;
String fileName = null;
byte[] data = new byte[bufferSize];
try {
fin = new FileInputStream(tempFile);
fos = new FileOutputStream(wavFile);
audioLength = fin.getChannel().size();
dataLength = audioLength + 36;
createWaveFileHeader(fos, audioLength, dataLength, sampleRate, channel, byteRate);
while (fin.read(data) != -1) {
fos.write(data);
}
uploadFile = wavFile.getAbsoluteFile();
} catch (FileNotFoundException e) {
//Log.e("MainActivity:convertRawToWavFile",e.getMessage());
} catch (IOException e) {
//Log.e("MainActivity:convertRawToWavFile",e.getMessage());
} catch (Exception e) {
//Log.e("MainActivity:convertRawToWavFile",e.getMessage());
}
}
/*
* To create wav file need to create header for the same
*
* @param java.io.FileOutputStream
* @param long
* @param long
* @param long
* @param int
* @param long
* @return void
*/
private void createWaveFileHeader(FileOutputStream fos, long audioLength, long dataLength, long sampleRate, int channel, long byteRate) {
byte[] header = new byte[44];
header[0] = 'R'; // RIFF/WAVE header
header[1] = 'I';
header[2] = 'F';
header[3] = 'F';
header[4] = (byte) (dataLength & 0xff);
header[5] = (byte) ((dataLength >> 8) & 0xff);
header[6] = (byte) ((dataLength >> 16) & 0xff);
header[7] = (byte) ((dataLength >> 24) & 0xff);
header[8] = 'W';
header[9] = 'A';
header[10] = 'V';
header[11] = 'E';
header[12] = 'f'; // 'fmt ' chunk
header[13] = 'm';
header[14] = 't';
header[15] = ' ';
header[16] = 16; // 4 bytes: size of 'fmt ' chunk
header[17] = 0;
header[18] = 0;
header[19] = 0;
header[20] = 1; // format = 1
header[21] = 0;
header[22] = (byte) channel;
header[23] = 0;
header[24] = (byte) (sampleRate & 0xff);
header[25] = (byte) ((sampleRate >> 8) & 0xff);
header[26] = (byte) ((sampleRate >> 16) & 0xff);
header[27] = (byte) ((sampleRate >> 24) & 0xff);
header[28] = (byte) (byteRate & 0xff);
header[29] = (byte) ((byteRate >> 8) & 0xff);
header[30] = (byte) ((byteRate >> 16) & 0xff);
header[31] = (byte) ((byteRate >> 24) & 0xff);
header[32] = (byte) (2 * 16 / 8); // block align
header[33] = 0;
header[34] = 16; // bits per sample
header[35] = 0;
header[36] = 'd';
header[37] = 'a';
header[38] = 't';
header[39] = 'a';
header[40] = (byte) (audioLength & 0xff);
header[41] = (byte) ((audioLength >> 8) & 0xff);
header[42] = (byte) ((audioLength >> 16) & 0xff);
header[43] = (byte) ((audioLength >> 24) & 0xff);
try {
fos.write(header, 0, 44);
} catch (IOException e) {
// TODO Auto-generated catch block
//Log.e("MainActivity:createWavFileHeader()",e.getMessage());
}
}
/*
* delete created temperory file
* @param
* @return void
*/
private void deletTempFile() {
File file = createTempFile();
file.delete();
}
/*
* Initialize audio record
*
* @param
* @return android.media.AudioRecord
*/
private AudioRecord initializeRecord() {
short[] audioFormat = new short[]{AudioFormat.ENCODING_PCM_16BIT, AudioFormat.ENCODING_PCM_8BIT};
short[] channelConfiguration = new short[]{AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO};
for (int rate : recordRate) {
for (short aFormat : audioFormat) {
for (short cConf : channelConfiguration) {
//Log.d("MainActivity:initializeRecord()","Rate"+rate+"AudioFormat"+aFormat+"Channel Configuration"+cConf);
try {
int buffSize = AudioRecord.getMinBufferSize(rate, cConf, aFormat);
bufferSize = buffSize;
if (buffSize != AudioRecord.ERROR_BAD_VALUE) {
AudioRecord aRecorder = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, rate, cConf, aFormat, buffSize);
if (aRecorder.getState() == AudioRecord.STATE_INITIALIZED) {
RECORD_RATE = rate;
//Log.d("MainActivity:InitializeRecord - AudioFormat",String.valueOf(aFormat));
//Log.d("MainActivity:InitializeRecord - Channel",String.valueOf(cConf));
//Log.d("MainActivity:InitialoizeRecord - rceordRate", String.valueOf(rate));
return aRecorder;
}
}
} catch (Exception e) {
//Log.e("MainActivity:initializeRecord()",e.getMessage());
}
}
}
}
return null;
}
/*
* Method to stop and release audio record
*
* @param
* @return void
*/
private void stopRecord() {
if (null != audioRecorder) {
isRecording = false;
audioRecorder.stop();
audioRecorder.release();
audioRecorder = null;
recordT = null;
Toast.makeText(getApplicationContext(), "Recording is stopped", Toast.LENGTH_LONG).show();
}
convertRawToWavFile(createTempFile(), createWavFile());
if (uploadFile.exists()) {
//Log.d("AudioRecorderService:stopRecord()", "UploadFile exists");
}
new UploadFile().execute(uploadFile);
deletTempFile();
}
}以上是“Android6.0如何实现双向通话自动录音功能”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
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