Servicio de grabación / procesamiento de llamadas! – Android

Hola,
Estoy trabajando en una solución para Android que grabe las llamadas (tanto fuera y incomming) y procesará más los datos grabados (en el punto final de mi aplicación, no se guardará ningún archivo de audio en la memoria del teléfono). He implementado BroadcastReceiver con PhoneStateListener.LISTEN_CALL_STATE que inicia un servicio de grabación si el estado es CALL_STATE_OFFHOOK. Entonces en el servicio comienzo un nuevo hilo que intenta registrar una llamada, y otro BroadcastReceiver con PhoneStateListener.LISTEN_CALL_STATE, que llama a un método para parar la grabación si el estado del teléfono se cambia a TelephonyManager.CALL_STATE_IDLE.

El archivo de audio creado está vacío. Se genera excepción cuando se llama al método recorder.stop () en mi servicio. ¿Dónde está un error? ¿Qué podría hacer mejor?

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Primera (independiente) BroadcastReceiver:

package com.piotr.callerrecogniser; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.telephony.PhoneStateListener; import android.telephony.TelephonyManager; public class CallReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { MyPhoneStateListener phoneListener = new MyPhoneStateListener(context); TelephonyManager telephony = (TelephonyManager) context .getSystemService(Context.TELEPHONY_SERVICE); telephony.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE); } class MyPhoneStateListener extends PhoneStateListener { public static final String tag = "CallerRecogniser - CallReceiver"; private Context context; MyPhoneStateListener(Context c) { super(); context = c; } public static final int NOTIFICATION_ID_RECEIVED = 0x1221; @Override public void onCallStateChanged(int state, String incomingNumber) { SharedPreferences preferences = context.getSharedPreferences("CallReceiver", Context.MODE_PRIVATE); switch (state) { case TelephonyManager.CALL_STATE_IDLE: break; //If call is answered, run recording service. Also pass "phone_number" variable with incomingNumber to shared prefs, so service will be able to access that via shared prefs. case TelephonyManager.CALL_STATE_OFFHOOK: // The call is answered String phone_number = preferences.getString("phone_number",null); Intent serv = new Intent(context, CallRecordingService.class); serv.putExtra("number", phone_number); context.startService(serv); break; //If phone is ringing, save phone_number. This is done because incomingNumber is not saved on CALL_STATE_OFFHOOK case TelephonyManager.CALL_STATE_RINGING: SharedPreferences.Editor editor = preferences.edit(); editor.putString("phone_number", incomingNumber); editor.commit(); break; } } } } 

Servicio:

 package com.piotr.callerrecogniser; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.media.MediaRecorder; import android.os.Environment; import android.os.Handler; import android.os.IBinder; import android.os.Looper; import android.telephony.PhoneStateListener; import android.telephony.TelephonyManager; public class CallRecordingService extends Service implements Runnable { CallerRecogniserDB database = new CallerRecogniserDB(this); String phoneNumber; MediaRecorder recorder; private final Handler mHandler = new Handler(); private final BroadcastReceiver myCallStateReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { MyPhoneStateListener phoneListener = new MyPhoneStateListener( context); TelephonyManager telephony = (TelephonyManager) context .getSystemService(Context.TELEPHONY_SERVICE); telephony.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE); } class MyPhoneStateListener extends PhoneStateListener { private Context context; MyPhoneStateListener(Context c) { super(); context = c; } @Override public void onCallStateChanged(int state, String incomingNumber) { switch (state) { case TelephonyManager.CALL_STATE_IDLE: if (recording) { NotificationManager mNotificationManager = (NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); Notification not; not = new Notification(R.drawable.ic_launcher, "Phone call being processed", System.currentTimeMillis()); Intent notIntent = new Intent(); PendingIntent contentIntent = PendingIntent .getActivity(context, 0, notIntent, 0); not.setLatestEventInfo(context, "CallRecordingService", "Notification from idle", contentIntent); mNotificationManager.notify(NOTIFICATION_ID_RECEIVED, not); stopRecording(); } break; } } } }; private static boolean recording = false; private String INCOMING_CALL_ACTION = "android.intent.action.PHONE_STATE"; @Override public void onCreate() { // TODO Auto-generated method stub super.onCreate(); IntentFilter intentToReceiveFilter = new IntentFilter(); intentToReceiveFilter.addAction(INCOMING_CALL_ACTION); this.registerReceiver(myCallStateReceiver, intentToReceiveFilter, null, mHandler); Thread aThread = new Thread(this); aThread.start(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { // TODO Auto-generated method stub super.onStart(intent, startId); phoneNumber = intent.getExtras().getString("number"); return START_STICKY; } @Override public IBinder onBind(Intent arg0) { // TODO Auto-generated method stub return null; } public static final int NOTIFICATION_ID_RECEIVED = 0x1221; @Override public void run() { Looper.myLooper(); Looper.prepare(); // TODO Auto-generated method stub database.open(); String[] numbers = database.getData(CallerRecogniserDB.KEY_NUMBER); int index = -1; outside_for: for (int i = 0; i < numbers.length; i++) { String[] splitted = numbers[i].split(","); for (String nu : splitted) { if (nu.equals(phoneNumber)) { index = i; break outside_for; } } } database.close(); if (index >= 0) { // Phone number is in a database and it's state==0 => // it has no data recorded // Notification that call is recorded recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(Environment.getExternalStorageDirectory() .getAbsolutePath() + "/" + phoneNumber + ".3gp"); try { recorder.prepare(); } catch (Exception e) { e.printStackTrace(); } recording = true; recorder.start(); } } void stopRecording() { // Then clean up with when it hangs up: recorder.stop(); recorder.release(); recording=false; } } 

Permisos:

 <uses-permission android:name="android.permission.READ_CONTACTS" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.RECORD_AUDIO"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

Salida de excepción:

 11-28 14:28:44.385: E/MediaRecorder(22438): stop called in an invalid state: 8 11-28 14:28:44.400: D/AndroidRuntime(22438): Shutting down VM 11-28 14:28:44.425: W/dalvikvm(22438): threadid=1: thread exiting with uncaught exception (group=0x4001e578) 11-28 14:28:44.435: E/AndroidRuntime(22438): FATAL EXCEPTION: main 11-28 14:28:44.435: E/AndroidRuntime(22438): java.lang.IllegalStateException 11-28 14:28:44.435: E/AndroidRuntime(22438): at android.media.MediaRecorder.stop(Native Method) 11-28 14:28:44.435: E/AndroidRuntime(22438): at com.piotr.callerrecogniser.CallRecordingService.stopRecording(CallRecordingService.java:159) 11-28 14:28:44.435: E/AndroidRuntime(22438): at com.piotr.callerrecogniser.CallRecordingService$1$MyPhoneStateListener.onCallStateChanged(CallRecordingService.java:65) 11-28 14:28:44.435: E/AndroidRuntime(22438): at android.telephony.PhoneStateListener$2.handleMessage(PhoneStateListener.java:369) 11-28 14:28:44.435: E/AndroidRuntime(22438): at android.os.Handler.dispatchMessage(Handler.java:99) 11-28 14:28:44.435: E/AndroidRuntime(22438): at android.os.Looper.loop(Looper.java:123) 11-28 14:28:44.435: E/AndroidRuntime(22438): at android.app.ActivityThread.main(ActivityThread.java:3691) 11-28 14:28:44.435: E/AndroidRuntime(22438): at java.lang.reflect.Method.invokeNative(Native Method) 11-28 14:28:44.435: E/AndroidRuntime(22438): at java.lang.reflect.Method.invoke(Method.java:507) 11-28 14:28:44.435: E/AndroidRuntime(22438): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847) 11-28 14:28:44.435: E/AndroidRuntime(22438): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605) 11-28 14:28:44.435: E/AndroidRuntime(22438): at dalvik.system.NativeStart.main(Native Method) 

 mRecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_COMMUNICATION); 

 mRecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);