如何在Android中检测来电状态

Question

Is there any way in which we can detect status of incoming call in android like TelephonyManager.CALL_STATE_RINGING or CALL_STATE_IDLE . If the incoming call is answered then what is its status in TELEPHONY MANAGER API

If the incoming call is missed that is not answered then what is its status in TELEPHONY MANAGER API. What can I do to resolve this issue?

Answer 1

This is what i did

Manifest File :

    <receiver android:name="com.xxx.xxx.zzz.IncomingCallReceiver" >
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE"></action>
        </intent-filter>
    </receiver>

fields in my BroadcastReceiver(IncomingCallReceiver)

private static String previousCallingNumber = null;
private static String previousState = null;
private String RINGING = TelephonyManager.EXTRA_STATE_RINGING;
private String OFFHOOOK = TelephonyManager.EXTRA_STATE_OFFHOOK;
private String IDLE = TelephonyManager.EXTRA_STATE_IDLE;

public void onReceive(final Context context,Intent intent) {


    final Bundle extras = intent.getExtras();
    String state= null;

    if (extras != null)
    {
        state = extras.getString(TelephonyManager.EXTRA_STATE);
    }

    /**
         * This part of the code records that a call was recieved/attended or missed.
         * 
         */
        else if (state!=null &&  state.equals(OFFHOOOK))
        {

            if(previousState!=null)
            {

                        if(previousState.equals(RINGING) && previousCallingNumber!=null)
                        {
                           /**
                             *   received call, the ringing call has been attended. 
                             */
                         String msisdn = MSISDNPreFixHandler.fixMsisdn(previousCallingNumber);


                         Log.i("IncomingCallReceiver", "Incoming Received Call Saved: "+msisdn);


                       }

            }
            /**
             * Else the Incoming Call receiver is triggered when an outgoing call is made.
             * 
             */

        }
        else if (state!=null &&  state.equals(IDLE))
        {

                String incomingNumberForMissedCall = extras.getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
                String msisdn = MSISDNPreFixHandler.fixMsisdn(incomingNumberForMissedCall);

                if(incomingNumberForMissedCall!=null)
                {                      
                   /**
                     *   missed call, the ringing call has been missed. 
                     */



                     Log.i("IncomingCallReceiver", "Missed Call Saved: "+msisdn);


                }

         }


    /**
     *   Very important to keep the previous state & number in cache , 
     *   as through it we can recognize the received attended call.
     * 
     */

    previousState = state;
    previousCallingNumber = extras.getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
}

Answer 2

To get the state when a call comes in need to create a BroadcastReceiver to handle the ACTION_ANSWER intent.

You can also add a BroadcastReceiver for the ACTION_PHONE_STATE_CHANGED and watch as the TelephonyManager Call State changes. I'm not entirely sure the behavior of the call status during the call or if missed, but you can pretty quickly experiment with it using BroadcastReceiver .

Don't forget to register the receivers in your AndroidManifest.xml .