So, for example, If I want to create a new register with each incoming call
in my database tableI should use a BroadcastReceiver, and if I want to do
some actions in my app when appears an incoming call I should use a listener
(like save some states or stop a service), is ok?
On the other hand I would like to know if is a good idea create static
variables in a BroadCastReceiver because if I do not do it I can not know
the duration of each answer call.
Thanks for your explanations and help!
2010/9/8 Indicator Veritatis <mej1...@yahoo.com>
> I think you have lost sight of the forest for the trees. The main
> difference is that the Listener is just that -- a Listener. If you
> don't use the Listener, you have to poll for changes in phone state or
> create a Receiver. Often, this is a waste of time. The Listener should
> be preferred, unless your needs are VERY simple, so that you can
> afford the waste of time implied by polling for state change, or the
> extra effort (as in your example) of making a whole Receiver.
>
> After all: except when it introduces nuisance complexity, fewer
> application components is better. It is rare that you would want to
> create a whole Receiver just for tracking phone state. Why bother,
> when you can use a Listener?
>
> Besides: how do you plan to communicate between your Receiver and your
> Activities? Generally, communicating with a Listener in the same
> Activity or in the hosting process's thread is easier. You didn't even
> try this communication in your example.
>
> On Sep 7, 1:09 am, KrcK --- <krc...@gmail.com> wrote:
> > Hi all,
> >
> > I would like to know what are the main differences between
> TelephonyManager
> > and PhoneStateListener, because you can do (more or less) the same things
> > with both.
> > For example, you could create an incoming calls register implementing a
> > broadcastreceiver and using TelephonyManger API or extending
> > PhoneStateListener class and registering this new listener
> > throughTelephonyManager .
> >
> > Case 1 - BroadcastReceiver (TelephonyManager)
> >
> > public class TestServiceReceiver extends BroadcastReceiver {
> > @Override
> > public void onReceive(Context context, Intent intent) {
> > TelephonyManager telephony = (TelephonyManager)
> > context.getSystemService(Context.TELEPHONY_SERVICE);
> > int state = telephony.getCallState();
> > switch(state) {
> > case TelephonyManager.CALL_STATE_IDLE:
> > Log.d("TestServiceReceiver", "IDLE");
> > break;
> > case TelephonyManager.CALL_STATE_OFFHOOK:
> > Log.d("TestServiceReceiver", "OFFHOOK");
> > break;
> > case TelephonyManager.CALL_STATE_RINGING:
> > Log.d("TestServiceReceiver", "RINGING");
> > break;
> > }
> >
> > }
> > }
> >
> > <receiver android:name=".TestServiceReceiver">
> > <intent-filter>
> > <action android:name="android.intent.action.PHONE_STATE" />
> > </intent-filter>
> > </receiver>
> > <uses-permission android:name="android.permission.READ_PHONE_STATE" />
> >
> > Case 2 - PhoneStateListener
> >
> > public class TestServiceReceiver extends BroadcastReceiver {
> > @Override
> > public void onReceive(Context context, Intent intent) {
> > TelephonyManager telephony = (TelephonyManager)
> > context.getSystemService(Context.TELEPHONY_SERVICE);
> > TestPhoneStateListener listener =
> > new TestPhoneStateListener();
> > telephony.listen(phoneListener,
> > PhoneStateListener.LISTEN_CALL_STATE);
> >
> > }
> > }
> >
> > public class TestPhoneStateListener extends PhoneStateListener {
> > public void onCallStateChanged(int state,String incomingNumber){
> > switch(state) {
> > case TelephonyManager.CALL_STATE_IDLE:
> > Log.d("TestPhoneStateListener ", "IDLE");
> > break;
> > case TelephonyManager.CALL_STATE_OFFHOOK:
> > Log.d("TestPhoneStateListener ", "OFFHOOK");
> > break;
> > case TelephonyManager.CALL_STATE_RINGING:
> > Log.d("TestPhoneStateListener ", "RINGING");
> > break;
> > }
> >
> > }
> > }
> >
> > <receiver android:name=".TestServiceReceiver">
> > <intent-filter>
> > <action android:name="android.intent.action.PHONE_STATE" />
> > </intent-filter>
> > </receiver>
> > <uses-permission android:name="android.permission.READ_PHONE_STATE" />
> >
> > In case 2, when the phone state changed, a new testphonestatelistener
> will
> > be registered (telephony.listen(phoneListener,
> > PhoneStateListener.LISTEN_CALL_STATE)), but I could solve this problem
> > convertingthe TestPhoneStateListener into a Singleton and
> > using PhoneStateListener listener =
> TestPhoneStateListener().getInstance()
> > instead TestPhoneStateListener listener = new TestPhoneStateListener().
> >
> > So my main question is when I have to use each one and for what purposes.
> >
> > Thanks and regards!
>
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