Implement push notifications

app/build.gradle

@@ -21,8 +21,9 @@ android {
 
 dependencies {
     implementation 'com.android.support:design:28.0.0-rc02'
-    googleImplementation 'com.google.firebase:firebase-core:16.0.1'
-    googleImplementation 'com.crashlytics.sdk.android:crashlytics:2.9.4'
+    googleImplementation 'com.google.firebase:firebase-core:16.0.3'
+    googleImplementation 'com.google.firebase:firebase-messaging:17.3.2'
+    googleImplementation 'com.crashlytics.sdk.android:crashlytics:2.9.5'
 }
 
 if (getGradle().getStartParameter().getTaskRequests().toString().contains('Google')) {

app/src/google/AndroidManifest.xml

@@ -1,16 +1,27 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+    xmlns:tools="http://schemas.android.com/tools"
+    package="org.traccar.manager">
 
     <application
-        android:name="org.traccar.client.GoogleMainApplication"
+        android:name=".GoogleMainApplication"
         tools:replace="android:name">
 
         <meta-data
             android:name="google_analytics_adid_collection_enabled"
             android:value="false" />
 
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_channel_id"
+            android:value="@string/notification_channel_id" />
+
+        <service android:name=".ManagerMessagingService">
+            <intent-filter>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
+
     </application>
 
 </manifest>

app/src/google/java/org/traccar/manager/GoogleMainApplication.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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 org.traccar.manager;
+
+import android.app.Application;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Build;
+import android.support.v4.content.LocalBroadcastManager;
+
+import com.google.android.gms.tasks.OnSuccessListener;
+import com.google.firebase.analytics.FirebaseAnalytics;
+import com.google.firebase.iid.FirebaseInstanceId;
+import com.google.firebase.iid.InstanceIdResult;
+
+public class GoogleMainApplication extends Application {
+
+    private FirebaseAnalytics firebaseAnalytics;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        firebaseAnalytics = FirebaseAnalytics.getInstance(this);
+        IntentFilter intentFilter = new IntentFilter(MainFragment.EVENT_LOGIN);
+        LocalBroadcastManager.getInstance(this).registerReceiver(broadcastReceiver, intentFilter);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            NotificationChannel channel = new NotificationChannel(
+                    getString(R.string.notification_channel_id), getString(R.string.notification_channel),
+                    NotificationManager.IMPORTANCE_DEFAULT);
+            ((NotificationManager) getSystemService(NOTIFICATION_SERVICE)).createNotificationChannel(channel);
+        }
+    }
+
+    private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            FirebaseInstanceId.getInstance().getInstanceId().addOnSuccessListener(new OnSuccessListener<InstanceIdResult>() {
+                @Override
+                public void onSuccess(InstanceIdResult instanceIdResult) {
+                    broadcastToken(instanceIdResult.getToken());
+                }
+            });
+        }
+    };
+
+    public void broadcastToken(String token) {
+        Intent intent = new Intent(MainFragment.EVENT_TOKEN);
+        intent.putExtra(MainFragment.KEY_TOKEN, token);
+        LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
+    }
+
+}

app/src/google/java/org/traccar/manager/ManagerMessagingService.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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 org.traccar.manager;
+
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.support.v4.app.NotificationCompat;
+
+import com.google.firebase.messaging.FirebaseMessagingService;
+import com.google.firebase.messaging.RemoteMessage;
+
+public class ManagerMessagingService extends FirebaseMessagingService {
+
+    @Override
+    public void onMessageReceived(RemoteMessage remoteMessage) {
+        super.onMessageReceived(remoteMessage);
+
+        PendingIntent pendingIntent = PendingIntent.getActivity(
+                this, 0, new Intent(this, MainActivity.class), PendingIntent.FLAG_ONE_SHOT);
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, getString(R.string.notification_channel_id))
+                .setSmallIcon(R.mipmap.ic_launcher)
+                .setContentTitle(getString(R.string.app_name))
+                .setContentText(remoteMessage.getNotification().getBody())
+                .setAutoCancel(true)
+                .setContentIntent(pendingIntent);;
+        ((NotificationManager) getSystemService(NOTIFICATION_SERVICE)).notify(remoteMessage.hashCode(), builder.build());
+    }
+
+    @Override
+    public void onNewToken(String token) {
+        super.onNewToken(token);
+
+        ((GoogleMainApplication) getApplication()).broadcastToken(token);
+    }
+
+}

app/src/main/java/org/traccar/manager/MainFragment.java

@@ -17,14 +17,20 @@
 
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
+import android.content.BroadcastReceiver;
+import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
 import android.content.pm.ApplicationInfo;
 import android.content.res.AssetManager;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.support.annotation.Nullable;
+import android.support.v4.content.LocalBroadcastManager;
 import android.view.View;
+import android.webkit.JavascriptInterface;
 import android.webkit.MimeTypeMap;
 import android.webkit.ValueCallback;
 import android.webkit.WebChromeClient;
@@ -42,16 +48,37 @@
 
 public class MainFragment extends WebViewFragment {
 
+    public final static String EVENT_LOGIN = "eventLogin";
+    public final static String EVENT_TOKEN = "eventToken";
+    public final static String KEY_TOKEN = "keyToken";
+
     private final static int REQUEST_FILE_CHOOSER = 1;
 
     private AssetManager assetManager;
+    private LocalBroadcastManager broadcastManager;
+
+    public class AppInterface {
+
+        @JavascriptInterface
+        public void postMessage(String message) {
+            if (message.contains("login")) {
+                broadcastManager.sendBroadcast(new Intent(EVENT_LOGIN));
+            }
+        }
+
+    }
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        assetManager = getActivity().getAssets();
+        broadcastManager = LocalBroadcastManager.getInstance(getActivity());
+    }
 
     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        assetManager = getActivity().getAssets();
-
         if ((getActivity().getApplicationInfo().flags &= ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                 WebView.setWebContentsDebuggingEnabled(true);
@@ -60,6 +87,7 @@ public void onViewCreated(View view, Bundle savedInstanceState) {
 
         getWebView().setWebViewClient(webViewClient);
         getWebView().setWebChromeClient(webChromeClient);
+        getWebView().addJavascriptInterface(new AppInterface(), "appInterface");
 
         WebSettings webSettings = getWebView().getSettings();
         webSettings.setJavaScriptEnabled(true);
@@ -73,6 +101,28 @@ public void onViewCreated(View view, Bundle savedInstanceState) {
         getWebView().loadUrl(url);
     }
 
+    private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            String token = intent.getStringExtra(KEY_TOKEN);
+            String code = "updateNotificationToken && updateNotificationToken('" + token + "')";
+            getWebView().evaluateJavascript(code, null);
+        }
+    };
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        IntentFilter intentFilter = new IntentFilter(EVENT_TOKEN);
+        broadcastManager.registerReceiver(broadcastReceiver, intentFilter);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        broadcastManager.unregisterReceiver(broadcastReceiver);
+    }
+
     public String getMimeType(String url) {
         String extension = MimeTypeMap.getFileExtensionFromUrl(url);
         if (extension != null) {

app/src/main/res/values/strings.xml

@@ -5,4 +5,5 @@
     <string name="button_start">Start</string>
     <string name="error_connection">Server connection failed</string>
     <string name="file_browser">File Browser</string>
+    <string name="notification_channel">Default</string>
 </resources>

app/src/main/res/values/values.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="notification_channel_id">default</string>
+</resources>