Added settings tile / quick settings

app/src/main/AndroidManifest.xml

@@ -53,9 +53,14 @@
 
         <activity
             android:name=".ActivitySetup"
-            android:exported="false"
+            android:exported="true"
             android:launchMode="singleInstance"
-            android:parentActivityName=".ActivityMain" />
+            android:parentActivityName=".ActivityMain">
+            <intent-filter>
+                <action android:name="android.intent.action.APPLICATION_PREFERENCES" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
 
         <activity
             android:name=".ActivityView"
@@ -106,6 +111,16 @@
             android:exported="true"
             android:permission="android.permission.BIND_JOB_SERVICE" />
 
+        <service
+            android:name=".ServiceTile"
+            android:icon="@drawable/baseline_mail_24"
+            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>
+        </service>
+
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}"

app/src/main/java/eu/faircode/email/ServiceTile.java

@@ -0,0 +1,95 @@
+package eu.faircode.email;
+
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018 by Marcel Bokhorst (M66B)
+*/
+
+import android.annotation.TargetApi;
+import android.content.Intent;
+import android.os.Build;
+import android.os.IBinder;
+import android.service.quicksettings.Tile;
+import android.service.quicksettings.TileService;
+import android.util.Log;
+
+import java.util.List;
+
+import androidx.lifecycle.LifecycleService;
+import androidx.lifecycle.Observer;
+
+@TargetApi(Build.VERSION_CODES.N)
+public class ServiceTile extends TileService {
+    LifecycleService owner = new LifecycleService();
+
+    @Override
+    public void onCreate() {
+        owner.onCreate();
+        super.onCreate();
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        owner.onBind(intent);
+        return super.onBind(intent);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        owner.onStartCommand(intent, flags, startId);
+        return super.onStartCommand(intent, flags, startId);
+    }
+
+    @Override
+    public void onDestroy() {
+        owner.onDestroy();
+        super.onDestroy();
+    }
+
+    public void onStartListening() {
+        Log.i(Helper.TAG, "Tile start");
+
+        DB db = DB.getInstance(this);
+        db.message().liveUnseenUnified().observe(owner, new Observer<List<TupleMessageEx>>() {
+            @Override
+            public void onChanged(List<TupleMessageEx> messages) {
+                Tile tile = getQsTile();
+                if (tile != null) {
+                    tile.setState(messages.size() > 0 ? Tile.STATE_ACTIVE : Tile.STATE_INACTIVE);
+                    tile.setLabel(getResources().getQuantityString(
+                            R.plurals.title_tile_unseen, messages.size(), messages.size()));
+                    tile.updateTile();
+                }
+            }
+        });
+    }
+
+    public void onStopListening() {
+        Log.i(Helper.TAG, "Tile stop");
+
+        DB db = DB.getInstance(this);
+        db.message().liveUnseenUnified().removeObservers(owner);
+    }
+
+    public void onClick() {
+        Log.i(Helper.TAG, "Tile click");
+
+        Intent clear = new Intent(this, ServiceSynchronize.class);
+        clear.setAction("clear");
+        startService(clear);
+    }
+}

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

@@ -31,6 +31,11 @@
         <item quantity="other">%1$d unsent messages</item>
     </plurals>
 
+    <plurals name="title_tile_unseen">
+        <item quantity="one">%1$d new</item>
+        <item quantity="other">%1$d new</item>
+    </plurals>
+
     <string name="title_notification_failed">\'%1$s\' failed</string>
 
     <string name="menu_setup">Setup</string>