Hi,
I'm registering a PhoneStateListener in my service onCreate() method.
I want to do something when the call has ended, i.e. when state ==
TelephonyManager.CALL_STATE_IDLE. However when the very first call is
initiated my listener recieves two messages: one with CALL_STATE_IDLE
and the second one with CALL_STATE_OFFHOOK. Then after the user hangs
up I get third message with CALL_STATE_IDLE again. On subsequent calls
I get only two messages: CALL_STATE_OFFHOOK on call initialization and
CALL_STATE_IDLE on hangup.
I can't quite understand why I get the very first CALL_STATE_IDLE
which seems redundant and breaks my logic. As a workaround I had to
use a static variable to track previous call state.
My code looks like this:
public class LikeBookService extends Service {
private TelephonyManager tm;
private NotificationManager nm;
private static int previousCallState = 0;
private PhoneStateListener phoneStateListener = new
PhoneStateListener() {
@Override
public void onCallStateChanged(int state, String
incomingNumber) {
super.onCallStateChanged(state, incomingNumber);
if (state == TelephonyManager.CALL_STATE_IDLE && state
!=
previousCallState) {
//do stuff on hang up
}
previousCallState = state;
}
};
@Override
public void onCreate() {
super.onCreate();
nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
tm = (TelephonyManager)
getSystemService(Context.TELEPHONY_SERVICE);
int events = PhoneStateListener.LISTEN_CALL_STATE;
tm.listen(phoneStateListener, events);
}
@Override
public void onStart(Intent intent, int startId) {
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
int events = PhoneStateListener.LISTEN_NONE;
tm.listen(phoneStateListener, events);
}
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