Java tutorial
/******* Copyright 2015 NeuroBASE,Inc. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. **********/ package com.echopf; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.os.Handler; import com.google.firebase.iid.FirebaseInstanceId; import org.json.JSONException; import org.json.JSONObject; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; /** * {@.en An ECHOInstallation is a device installation object for push notification.} * {@.ja ?} */ public class ECHOInstallation { protected String deviceToken = null; protected String deviceType = "android"; protected final Object lock = new Object(); private String GCM_SENDER_ID_KEY = "com.echopf.push.gcm_sender_id"; protected final static int PLAY_SERVICES_RESOLUTION_REQUEST = 9000; /* Begin constructors */ /** * {@.en Constructs a new ECHOInstallation.} * {@.ja ?????????} */ public ECHOInstallation() { super(); } /** * Constructs a new ECHOInstallation based on an existing one on the remote server. * @param source a source JSONObject to copy */ public ECHOInstallation(JSONObject source) { this(); copyData(source); } /* End constructors */ /** * {@.en Gets registration ID from the GCM server by synchronous communication.} * {@.ja ??registrationID??} * * @throws ECHOException */ public ECHOInstallation getRegistrationId() throws ECHOException { doGetRegistrationId(true, null); return this; } /** * {@.en Gets registration ID from the GCM server in a background thread. * A callback is done in the main (UI) thread after the getting.} * {@.ja ???registrationID???????????} * * @param callback */ public void getRegistrationIdInBackground(InstallationCallback callback) { try { doGetRegistrationId(false, callback); } catch (ECHOException e) { throw new InternalError(); } } /** * Converts this object into an acceptable JSONObject for the API. * * @return the formatted JSONObject */ public JSONObject toJSONObject() { JSONObject obj = new JSONObject(); try { if (deviceType instanceof String) obj.put("device_type", deviceType); if (deviceToken instanceof String) obj.put("device_token", deviceToken); } catch (JSONException e) { throw new RuntimeException(e); } return obj; } /** * Copies data from a JSONObject. * * @param source the source JSONObject */ protected void copyData(JSONObject source) { String deviceType = source.optString("device_type"); if (!(deviceType instanceof String)) return; // skip String deviceToken = source.optString("device_token"); if (!(deviceToken instanceof String)) return; // skip this.deviceType = deviceType; this.deviceToken = deviceToken; } /** * Does Get registration id from the GCM server in a background thread. * * @param sync if set TRUE, then the main (UI) thread is waited for complete the fetching in a background thread. * (a synchronous communication) * @param callback invoked after the getting is completed * @throws ECHOException */ protected void doGetRegistrationId(final boolean sync, final InstallationCallback callback) throws ECHOException { // if(!checkPlayServices(ECHO.context)) return; // Get senderId from AndroidManifest.xml String senderId = null; try { ApplicationInfo appInfo = ECHO.context.getPackageManager() .getApplicationInfo(ECHO.context.getPackageName(), PackageManager.GET_META_DATA); senderId = appInfo.metaData.getString(GCM_SENDER_ID_KEY); senderId = (senderId.startsWith("id:")) ? senderId.substring(3) : null; } catch (NameNotFoundException ignored) { // skip } if (senderId == null) throw new RuntimeException("`" + GCM_SENDER_ID_KEY + "` is not specified in `AndroidManifest.xml`."); // Get ready a background thread final Handler handler = new Handler(); final String fSenderId = senderId; ExecutorService executor = Executors.newSingleThreadExecutor(); Callable<Object> communictor = new Callable<Object>() { @Override public Object call() throws ECHOException { ECHOException exception = null; // InstanceID instanceID = InstanceID.getInstance(ECHO.context); String token = null; // Get updated InstanceID token. token = FirebaseInstanceId.getInstance().getToken(); // Log.d(TAG, "Refreshed token: " + refreshedToken); // TODO: Implement this method to send any registration to your app's servers. // token = instanceID.getToken(fSenderId, GoogleCloudMessaging.INSTANCE_ID_SCOPE); synchronized (lock) { deviceToken = token; } if (sync == false) { // Execute a callback method in the main (UI) thread. final ECHOException fException = exception; final String fToken = token; handler.post(new Runnable() { @Override public void run() { ECHOInstallation.this.deviceToken = fToken; callback.done(fException); } }); } else { if (exception != null) throw exception; } return null; } }; Future<Object> future = executor.submit(communictor); if (sync) { try { future.get(); } catch (InterruptedException e) { Thread.currentThread().interrupt(); // ignore/reset } catch (ExecutionException e) { Throwable e2 = e.getCause(); if (e2 instanceof ECHOException) { throw (ECHOException) e2; } throw new RuntimeException(e2); } } } }