static void unregister(final Context context, final String regId) { Log.i(TAG, "unregistering device (regId = " + regId + ")"); String serverUrl = SERVER_URL + "/unregister"; Map<String, String> params = new HashMap<String, String>(); params.put("regId", regId); try { post(serverUrl, params); GCMRegistrar.setRegisteredOnServer(context, false); String message = context.getString(R.string.server_unregistered); CommonUtilities.displayMessage(context, message); } catch (IOException e) { String message = context.getString(R.string.server_unregister_error, e.getMessage()); CommonUtilities.displayMessage(context, message); } }
static boolean register(final Context context, final String regId) { Log.i(TAG, "registering device (regId = " + regId + ")"); String serverUrl = SERVER_URL + "/register"; Map<String, String> params = new HashMap<String, String>(); params.put("regId", regId); long backoff = BACKOFF_MILLI_SECONDS + random.nextInt(1000); for (int i = 1; i <= MAX_ATTEMPTS; i++) { Log.d(TAG, "Attempt #" + i + " to register"); try { displayMessage(context, context.getString(R.string.server_registering, i, MAX_ATTEMPTS)); post(serverUrl, params); GCMRegistrar.setRegisteredOnServer(context, true); String message = context.getString(R.string.server_registered); CommonUtilities.displayMessage(context, message); return true; } catch (IOException e) { // Here we are simplifying and retrying on any error; in a real // application, it should retry only on unrecoverable errors // (like HTTP error code 503). 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); CommonUtilities.displayMessage(context, message); return false; }