[Android] Telephony/Call

1. Listen outgoing call
   Register a broadcast receiver with action android.intent.action.NEW_OUTGOING_CALL,
   but please request to use permission android.permission.PROCESS_OUTGOING_CALLS. You can get outgoing phone number with following statement in method BroadcastReceiver.onReceive(xxx);
   String strPhoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
2. Listen incoming call
   Use TelephonyManager and PhoneStateListener
   import android.app.Activity;
   import android.content.Context;
   import android.telephony.PhoneStateListener;
   import android.telephony.TelephonyManager;
   
   public class Telephony extends Activity
   {
       protected void onCreate(Bundle savedInstanceState)
       {
           super.onCreate(savedInstanceState);
           TelephonyManager mTelephonyMgr =
   (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
           mTelephonyMgr.listen(new TeleListener(),
   PhoneStateListener.LISTEN_CALL_STATE);
   
     setContentView(xxxxxxxx);
   }
   
   class TeleListener extends PhoneStateListener
   {
       public void onCallStateChanged(int state, String incomingNumber)
       {
           super.onCallStateChanged(state, incomingNumber);
           switch (state)
           {
               case TelephonyManager.CALL_STATE_IDLE: //The call is terminated
               //CALL_STATE_IDLE;
                  break;
               case TelephonyManager.CALL_STATE_OFFHOOK: //The call is answered
                  //CALL_STATE_OFFHOOK;
                  break;
               case TelephonyManager.CALL_STATE_RINGING: //The new call is comming
                  //CALL_STATE_RINGING
                  break;
               default:
                  break;
            }
         }
       }
   }
3. Implement Call Filter/Firewall
   
   • Please refer to:
     %20package:%5C.googlecode%5C.com&d=0
   • Sample:
     
   • Prepare ITelephony.aidl
     Download iTelephony.aidl from
     then add that file to src/com/android/internal/telephony/ of your project
     
   • Add permissions to AndroidManifest.xml
     
     
     
     
   • Write Code
     import java.lang.reflect.Method;
     import com.android.internal.telephony.ITelephony;
     import android.telephony.*;
     
     ......
     
     private TelephonyManager m_telephonyManager;
     private ITelephony m_telephonyService;
     private PhoneStateListener m_phoneStateListener;
     private AudioManager m_audioManager;
     
     ....
     
     m_telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
     
     
     Class c = Class.forName(m_telephonyManager.getClass().getName());
     Method m = c.getDeclaredMethod("getITelephony");
     m.setAccessible(true);
     m_telephonyService = (ITelephony)m.invoke(m_telephonyManager);
     
     //You can also replace above 4 lines of statements to
     //m_telephonyService = ITelephony.Stub.asInterface(ServiceManager.getService(Context.TELE
     
     m_audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
     
     m_telephonyManager.listen(new MyPhoneStateListener(), PhoneStateListener.LISTEN_CALL_STATE);
     
     
     
     ....
     
     
     class MyPhoneStateListener extends PhoneStateListener
     {
         public void onCallStateChanged(int state, String incomingNumber)
         {
             m_audioManager.setRingerMode(AudioManager.RINGER_MODE_SILENT);
     
             switch (state)
             {
                 case TelephonyManager.CALL_STATE_IDLE:
                    m_audioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
                    break;
                 case TelephonyManager.CALL_STATE_OFFHOOK:
                    //CALL_STATE_OFFHOOK;
                    break;
                 case TelephonyManager.CALL_STATE_RINGING:
                    if (xx) // if incomingNumber need to be blocked
                    {
                        m_telephonyService.endCall();
                    }
                    else
                    {
                        m_audioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
                    }
                    break;
                 default:
                    break;
              }
           }
         }
     }
   • xxxxx
     
   • xxxx
     
4. Replace Incoming call screen
   Sample: Android Caller ID
   
   
5. xxx