public static boolean register(
final Context context, final String regId, /* optional */ final String oldId) {
Log.i(TAG, "registering device");
String serverUrl = Secret.SERVER_REG_URL;
Map<String, String> params = new HashMap<String, String>();
params.put(P_REGID, regId);
params.put(P_USER, PrefsHelper.getUser(context));
params.put(P_PWD, PrefsHelper.getPwd(context));
if (oldId != "") {
params.put(P_OLDID, oldId);
}
long backoff = BACKOFF_MILLI_SECONDS + random.nextInt(1000);
// Once GCM returns a registration id, we need to register it in the
// app server. As the server might be down, we will retry it a couple
// times.
for (int i = 1; i <= MAX_ATTEMPTS; i++) {
if (GCMRegistrar.isRegisteredOnServer(context)) {
// AsyncTask finished meanwhile, return
return false;
}
Log.d(TAG, "Attempt #" + i + " to register");
try {
String message = post(serverUrl, params);
if (message.contains("Successfully added") || message.contains("already registered")) {
GCMRegistrar.setRegisteredOnServer(context, true);
GCMHelper.displayMessage(context, message);
return true;
} else {
// dont backoff in case of a wrong password
GCMHelper.displayMessage(context, message);
return false;
}
} catch (IOException e) {
Log.e(TAG, "Failed to register on attempt " + i, e);
if (i == MAX_ATTEMPTS) {
break;
}
try {
Log.d(TAG, "Sleeping for " + backoff + " ms before retry");
Thread.sleep(backoff);
} catch (InterruptedException e1) {
// Activity finished before we complete - exit.
Log.d(TAG, "Thread interrupted: abort remaining retries!");
Thread.currentThread().interrupt();
return false;
}
// increase backoff exponentially
backoff *= 2;
}
}
String message = context.getString(R.string.server_register_error, MAX_ATTEMPTS);
GCMHelper.displayMessage(context, message);
return false;
}
/** Unregister this account/device pair within the server. */
public static void unregister(final Context context, final String regId) {
Log.i(TAG, "unregistering device");
String serverUrl = Secret.SERVER_UNREG_URL;
Map<String, String> params = new HashMap<String, String>();
params.put(P_REGID, regId);
params.put(P_USER, PrefsHelper.getUser(context));
params.put(P_PWD, PrefsHelper.getPwd(context));
try {
String message = post(serverUrl, params);
GCMHelper.displayMessage(context, message);
if (message.contains("Success")) {
GCMRegistrar.setRegisteredOnServer(context, false);
}
} catch (IOException e) {
String message = context.getString(R.string.server_unregister_error, e.getMessage());
e.printStackTrace();
GCMHelper.displayMessage(context, message);
}
}
