private void updateView()
{
//Get the stored latest registration id
var registrationId = PushClient.GetRegistrationId(this);
//If it's empty, we need to register
if (string.IsNullOrEmpty(registrationId))
{
registered = false;
this.textRegistrationStatus.Text = "Registered: No";
this.textRegistrationId.Text = "Id: N/A";
this.buttonRegister.Text = "Register...";
Log.Info(TAG, "Not registered...");
}
else
{
registered = true;
this.textRegistrationStatus.Text = "Registered: Yes";
this.textRegistrationId.Text = "Id: " + registrationId;
this.buttonRegister.Text = "Unregister...";
Log.Info(TAG, "Already Registered: " + registrationId);
}
var preferences = GetSharedPreferences(this.PackageName, FileCreationMode.Private);
this.textLastMsg.Text = "Last Msg: " + Preferences.GetString(Constants.PREF_LAST_MESSAGE, "N/A");
//Enable the button as it was normally disabled
this.buttonRegister.Enabled = true;
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.Main);
textRegistrationStatus = FindViewById <TextView>(Resource.Id.textRegistrationStatus);
textRegistrationId = FindViewById <TextView>(Resource.Id.textRegistrationId);
textLastMsg = FindViewById <TextView>(Resource.Id.textLastMessage);
buttonRegister = FindViewById <Button>(Resource.Id.buttonRegister);
PushClient.CheckDevice(this);
PushClient.CheckManifest(this);
CheckPhoneNumber();
this.buttonRegister.Click += delegate {
if (!registered)
{
Log.Info(TAG, "Registering...");
PushClient.Register(this, PushHandlerBroadcastReceiver.SENDER_IDS);
}
else
{
Log.Info(TAG, "Unregistering...");
PushClient.UnRegister(this);
}
RunOnUiThread(() =>
{
//Disable the button so that we can't click it again
//until we get back to the activity from a notification
this.buttonRegister.Enabled = false;
});
};
}
protected override void OnHandleIntent(Intent intent)
{
try
{
var context = this.ApplicationContext;
var action = intent.Action;
if (action.Equals(Constants.INTENT_FROM_GCM_REGISTRATION_CALLBACK))
{
handleRegistration(context, intent);
}
else if (action.Equals(Constants.INTENT_FROM_GCM_MESSAGE))
{
// checks for special messages
var messageType = intent.GetStringExtra(Constants.EXTRA_SPECIAL_MESSAGE);
if (messageType != null)
{
if (messageType.Equals(Constants.VALUE_DELETED_MESSAGES))
{
var sTotal = intent.GetStringExtra(Constants.EXTRA_TOTAL_DELETED);
if (!string.IsNullOrEmpty(sTotal))
{
int nTotal = 0;
if (int.TryParse(sTotal, out nTotal))
{
Log.Verbose(TAG, "Received deleted messages notification: " + nTotal);
OnDeletedMessages(context, nTotal);
}
else
{
Log.Error(TAG, "GCM returned invalid number of deleted messages: " + sTotal);
}
}
}
else
{
// application is not using the latest GCM library
Log.Error(TAG, "Received unknown special message: " + messageType);
}
}
else
{
OnMessage(context, intent);
}
}
else if (action.Equals(Constants.INTENT_FROM_GCM_LIBRARY_RETRY))
{
var token = intent.GetStringExtra(EXTRA_TOKEN);
if (!string.IsNullOrEmpty(token) && !TOKEN.Equals(token))
{
// make sure intent was generated by this class, not by a
// malicious app.
Log.Error(TAG, "Received invalid token: " + token);
return;
}
// retry last call
if (PushClient.IsRegistered(context))
{
PushClient.internalUnRegister(context);
}
else
{
PushClient.internalRegister(context, SenderIds);
}
}
}
finally
{
// Release the power lock, so phone can get back to sleep.
// The lock is reference-counted by default, so multiple
// messages are ok.
// If OnMessage() needs to spawn a thread or do something else,
// it should use its own lock.
lock (LOCK)
{
//Sanity check for null as this is a public method
if (sWakeLock != null)
{
Log.Verbose(TAG, "Releasing Wakelock");
sWakeLock.Release();
}
else
{
//Should never happen during normal workflow
Log.Error(TAG, "Wakelock reference is null");
}
}
}
}
private void handleRegistration(Context context, Intent intent)
{
var registrationId = intent.GetStringExtra(Constants.EXTRA_REGISTRATION_ID);
var error = intent.GetStringExtra(Constants.EXTRA_ERROR);
var unregistered = intent.GetStringExtra(Constants.EXTRA_UNREGISTERED);
Log.Debug(TAG, "handleRegistration: registrationId = " + registrationId + ", error = " + error + ", unregistered = " + unregistered);
// registration succeeded
if (registrationId != null)
{
PushClient.ResetBackoff(context);
PushClient.SetRegistrationId(context, registrationId);
OnRegistered(context, registrationId);
return;
}
// unregistration succeeded
if (unregistered != null)
{
// Remember we are unregistered
PushClient.ResetBackoff(context);
var oldRegistrationId = PushClient.ClearRegistrationId(context);
OnUnRegistered(context, oldRegistrationId);
return;
}
// last operation (registration or unregistration) returned an error;
Log.Debug(TAG, "Registration error: " + error);
// Registration failed
if (Constants.ERROR_SERVICE_NOT_AVAILABLE.Equals(error))
{
var retry = OnRecoverableError(context, error);
if (retry)
{
int backoffTimeMs = PushClient.GetBackoff(context);
int nextAttempt = backoffTimeMs / 2 + sRandom.Next(backoffTimeMs);
Log.Debug(TAG, "Scheduling registration retry, backoff = " + nextAttempt + " (" + backoffTimeMs + ")");
var retryIntent = new Intent(Constants.INTENT_FROM_GCM_LIBRARY_RETRY);
retryIntent.PutExtra(EXTRA_TOKEN, TOKEN);
var retryPendingIntent = PendingIntent.GetBroadcast(context, 0, retryIntent, PendingIntentFlags.OneShot);
var am = AlarmManager.FromContext(context);
am.Set(AlarmType.ElapsedRealtime, SystemClock.ElapsedRealtime() + nextAttempt, retryPendingIntent);
// Next retry should wait longer.
if (backoffTimeMs < MAX_BACKOFF_MS)
{
PushClient.SetBackoff(context, backoffTimeMs * 2);
}
}
else
{
Log.Debug(TAG, "Not retrying failed operation");
}
}
else
{
// Unrecoverable error, notify app
OnError(context, error);
}
}
