I'm working with NFC on Android, specifically with Android Beam. My question is: is it possible to disable Android Beam support for an activity?
This is what some system applications do, such as messaging: if another phone is put close, my phone vibrates but the "Touch to beam" screen doesn't appear and the other phone doesn't receive anything.
EDIT: Calling:
NfcAdapter.setNdefPushMessage(NdefMessage message, Activity activity, Activity... activities)
in onResume() with a null message should do the trick (the doc says: "Pass a null NDEF message to disable foreground NDEF push in the specified activities.") but it doesn't work.
Thanks
When I do it like this, It works like a charm.
NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);
adapter.setNdefPushMessage(null, this, this);
There isn't a way to do this currently. Maybe you can provide a menu option to disable NFC in your app? Why do you want to do this, by the way?
EDIT:
Sorry, there is a way to do this. Call setNdefPushMessage() in the activities that you don't want to push anything with a null NDEF message. Let me know if that works.
Related
This question is pretty much a duplicate but the linked issue was never really resolved and the thread is a few months old so I didn't want to resurrect it.
The default behavior of apps running on an ICS device with Android Beam turned on is to push a message with the application Uri that will be processed by Google Play on the receiving end.
I am trying to develop an activity that will push NdefMessage if condition A is true and will otherwise disable pushing messages. The API documentation for setNdefPushMessage(...) seems to indicate that this is possible by passing in a null message:
Pass a null NDEF message to disable foreground NDEF push in the specified activities.
However, trying to simply ban all pushes via the following code still results with the "Touch to Beam" UI coming up and an application Uri being sent...
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getNfcAdapter().setNdefPushMessage(null, this);
}
Does anyone know if it is actually possible to disable pushes from an Activity? A few systems apps do it but I have not been able to locate the code that achieves this. Any help is much appreciated.
This seems to be a bug in Android ICS. Although the documentation says you should be able to disable it by setting the NDEF message null, this simply does not work. Good news is that it has been fixed and now does work in Android 4.1 Jellybean.
Once ACTION_NEW_OUTGOING_CALL has been broadcasted, I need to capture the following event of the other party answer. Could you advice on how to achieve that please? I know it is possible as the Android dialer app changes the green Android icon to the person's photo exactly when they pick up.
UPDATED: I've had a look at the source of the app on Android handling the outgoing calls. I noticed the following method in ContactsUtils:
/**
* Kick off an intent to initiate a call.
*/
public static void initiateCall(Context context, CharSequence
phoneNumber) {
Intent intent = new Intent(Intent.ACTION_CALL_PRIVILEGED,
Uri.fromParts("tel", phoneNumber.toString(), null));
context.startActivity(intent); }
I guess my answer is in the activity listening for Intent.ACTION_CALL_PRIVILEGED. So to rephrase my question: Does anyone know which activity handles Intent.ACTION_CALL_PRIVILEGED?
I don't think there's such API and also there's no API for sending DTMFs due to the same reason that you can't tell when the call is being connected.
It does not necessarily needs to be possible to capture this as an outside app. The green android icon is a part of the application that controls the call, so it does not need a broadcast to change the icon.
As far as android's telephony manager is concerned u cannot detect programmatically whether the call has been answered or not. This is to say that u do not have the option to know when the user picked the phone at other end.
Android has got 3 states of telephony manager and none of them are capable of detecting whether the call was actually answerd or not(IN CASE OF OUTGOING CALLS)
The only way you may be able to do this is by parsing the Logcat logs, no PhoneStateListener event is available for that.
Some are asking for it here: https://code.google.com/p/android/issues/detail?id=14266
Anyway, in versions above Android 4.2 as Logcat is "sandboxed" it may be impossible...
Once ACTION_NEW_OUTGOING_CALL has been broadcasted, I need to capture the following event of the other party answer. Could you advice on how to achieve that please? I know it is possible as the Android dialer app changes the green Android icon to the person's photo exactly when they pick up.
UPDATED: I've had a look at the source of the app on Android handling the outgoing calls. I noticed the following method in ContactsUtils:
/**
* Kick off an intent to initiate a call.
*/
public static void initiateCall(Context context, CharSequence
phoneNumber) {
Intent intent = new Intent(Intent.ACTION_CALL_PRIVILEGED,
Uri.fromParts("tel", phoneNumber.toString(), null));
context.startActivity(intent); }
I guess my answer is in the activity listening for Intent.ACTION_CALL_PRIVILEGED. So to rephrase my question: Does anyone know which activity handles Intent.ACTION_CALL_PRIVILEGED?
I don't think there's such API and also there's no API for sending DTMFs due to the same reason that you can't tell when the call is being connected.
It does not necessarily needs to be possible to capture this as an outside app. The green android icon is a part of the application that controls the call, so it does not need a broadcast to change the icon.
As far as android's telephony manager is concerned u cannot detect programmatically whether the call has been answered or not. This is to say that u do not have the option to know when the user picked the phone at other end.
Android has got 3 states of telephony manager and none of them are capable of detecting whether the call was actually answerd or not(IN CASE OF OUTGOING CALLS)
The only way you may be able to do this is by parsing the Logcat logs, no PhoneStateListener event is available for that.
Some are asking for it here: https://code.google.com/p/android/issues/detail?id=14266
Anyway, in versions above Android 4.2 as Logcat is "sandboxed" it may be impossible...
1 . can we get any event when user tap/touch native application(i.e. messaging,contacts).
2 . i know that any application launch by intent in android, there is any way to know which application launch with launch of application.
Thanks
No, We can not get any event directly or by any receiver.
what I have figured it that it can not be done directly......
But there are two work around for this :
Start a service that will check top-activity always by this way can know what activity got launched and do whatever you do under this condition.
Catch the logcat, read the line, and you can easily get what event what even took place, and by using your required filters you can even do whatever you like :)
can we get any event when user
tap/touch native application(i.e.
messaging,contacts).
Not generally. Most of these icons are tied to their applications.
there is any way to know which application launch with launch of application.
This makes no sense to me, sorry.
I am agree with #K_Rapid's answer..
Check code of AppLocker
I hope you will got solution from that code...
For (1): what do you mean by 'tap/touch'? Do you mean when the built-in applications are launched, or when they're interacted with?
If you mean launching, you can listen to any intents being fired by the system by registering a broadcast receiver. If you set your IntentFilter to receive intents with CATEGORY_LAUNCHER, you should be able to see when the launcher starts applications.
See:
http://developer.android.com/reference/android/content/Intent.html#CATEGORY_LAUNCHER
http://developer.android.com/reference/android/content/BroadcastReceiver.html
If you mean interacting, I don't think you can do that.
For (2): I don't believe that intents remember where they were constructed, so I don't think this is possible. I could be wrong, however.
Once ACTION_NEW_OUTGOING_CALL has been broadcasted, I need to capture the following event of the other party answer. Could you advice on how to achieve that please? I know it is possible as the Android dialer app changes the green Android icon to the person's photo exactly when they pick up.
UPDATED: I've had a look at the source of the app on Android handling the outgoing calls. I noticed the following method in ContactsUtils:
/**
* Kick off an intent to initiate a call.
*/
public static void initiateCall(Context context, CharSequence
phoneNumber) {
Intent intent = new Intent(Intent.ACTION_CALL_PRIVILEGED,
Uri.fromParts("tel", phoneNumber.toString(), null));
context.startActivity(intent); }
I guess my answer is in the activity listening for Intent.ACTION_CALL_PRIVILEGED. So to rephrase my question: Does anyone know which activity handles Intent.ACTION_CALL_PRIVILEGED?
I don't think there's such API and also there's no API for sending DTMFs due to the same reason that you can't tell when the call is being connected.
It does not necessarily needs to be possible to capture this as an outside app. The green android icon is a part of the application that controls the call, so it does not need a broadcast to change the icon.
As far as android's telephony manager is concerned u cannot detect programmatically whether the call has been answered or not. This is to say that u do not have the option to know when the user picked the phone at other end.
Android has got 3 states of telephony manager and none of them are capable of detecting whether the call was actually answerd or not(IN CASE OF OUTGOING CALLS)
The only way you may be able to do this is by parsing the Logcat logs, no PhoneStateListener event is available for that.
Some are asking for it here: https://code.google.com/p/android/issues/detail?id=14266
Anyway, in versions above Android 4.2 as Logcat is "sandboxed" it may be impossible...