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本文实例讲述了Android6.0编程实现双向通话自动录音功能的方法。分享给大家供大家参考,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,介绍一下android 电话状态的监听(来电和去电):
http://www.jb51.net/article/32433.htm
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();
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