Add quick settings tile.

Android/app/src/main/AndroidManifest.xml

@@ -19,6 +19,10 @@
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
+            <!-- Open MainActivity on quick settings tile long click -->
+            <intent-filter>
+                <action android:name="android.service.quicksettings.action.QS_TILE_PREFERENCES" />
+            </intent-filter>
         </activity>
 
         <service
@@ -31,6 +35,19 @@
             </intent-filter>
         </service>
 
+        <service
+            android:name="app.intra.sys.IntraTileService"
+            android:icon="@drawable/ic_tile"
+            android:label="@string/app_name"
+            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
+            <intent-filter>
+                <action android:name="android.service.quicksettings.action.QS_TILE"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.service.quicksettings.ACTIVE_TILE"
+                android:value="true" />
+        </service>
+
         <receiver android:name="app.intra.sys.AutoStarter" android:enabled="true">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />

Android/app/src/main/java/app/intra/sys/IntraTileService.java

@@ -0,0 +1,74 @@
+/*
+Copyright 2019 Jigsaw Operations LLC
+
+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
+
+https://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 app.intra.sys;
+
+import android.content.ComponentName;
+import android.content.Intent;
+import android.net.VpnService;
+import android.os.Build;
+import android.os.IBinder;
+import android.service.quicksettings.Tile;
+import android.service.quicksettings.TileService;
+
+import androidx.annotation.RequiresApi;
+
+import app.intra.ui.MainActivity;
+
+@RequiresApi(api = Build.VERSION_CODES.N)
+public class IntraTileService extends TileService {
+
+    @Override
+    public void onStartListening() {
+        VpnState vpnState = VpnController.getInstance().getState(this);
+
+        Tile tile = getQsTile();
+
+        if (vpnState.activationRequested) {
+            tile.setState(Tile.STATE_ACTIVE);
+        } else {
+            tile.setState(Tile.STATE_INACTIVE);
+        }
+
+        tile.updateTile();
+    }
+
+    @Override
+    public void onClick() {
+        VpnState vpnState = VpnController.getInstance().getState(this);
+
+        if (vpnState.activationRequested) {
+            VpnController.getInstance().stop(this);
+        } else {
+            if (VpnService.prepare(this) == null) {
+                // Start VPN service when VPN permission has been granted.
+                VpnController.getInstance().start(this);
+            } else {
+                // Open Main activity when VPN permission has not been granted.
+                Intent intent = new Intent(this, MainActivity.class);
+                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                startActivityAndCollapse(intent);
+            }
+        }
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        // Update tile state on boot.
+        TileService.requestListeningState(this,
+                new ComponentName(this, IntraTileService.class));
+        return super.onBind(intent);
+    }
+}

Android/app/src/main/java/app/intra/sys/IntraVpnService.java

@@ -19,6 +19,7 @@
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -32,6 +33,7 @@
 import android.os.Build.VERSION_CODES;
 import android.os.SystemClock;
 import android.preference.PreferenceManager;
+import android.service.quicksettings.TileService;
 import android.util.Log;
 import androidx.annotation.WorkerThread;
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
@@ -176,6 +178,8 @@ public synchronized int onStartCommand(Intent intent, int flags, int startId) {
 
     startForeground(SERVICE_ID, builder.getNotification());
 
+    updateQuickSettingsTile();
+
     return START_REDELIVER_INTENT;
   }
 
@@ -354,6 +358,8 @@ public void signalStopService(boolean userInitiated) {
 
     stopVpnAdapter();
     stopSelf();
+
+    updateQuickSettingsTile();
   }
 
   private VpnAdapter makeVpnAdapter() {
@@ -395,6 +401,13 @@ private synchronized void stopVpnAdapter() {
     }
   }
 
+  private void updateQuickSettingsTile() {
+    if (VERSION.SDK_INT >= VERSION_CODES.N) {
+      TileService.requestListeningState(this,
+              new ComponentName(this, IntraTileService.class));
+    }
+  }
+
   @Override
   public synchronized void onDestroy() {
     LogWrapper.log(Log.INFO, LOG_TAG, "Destroying DNS VPN service");

Android/app/src/main/res/drawable/ic_tile.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="48dp"
+    android:height="48dp"
+    android:viewportWidth="48"
+    android:viewportHeight="48">
+  <path
+      android:pathData="M24,23.1l-21.55,22.37l43.1,0z"
+      android:fillColor="#FFFFFF"/>
+  <path
+      android:pathData="M40,19c0,3.95 -1.43,7.56 -3.81,10.35L24,17.12L11.81,29.35C9.43,26.56 8,22.95 8,19c0,-8.83 7.17,-16 16,-16S40,10.17 40,19z"
+      android:fillColor="#FFFFFF"/>
+</vector>