Remove summary provider

- use SummaryProvider to provide the summary of UserSettings
- use WifiDisplayPreferenceController to replace the summary loader
in WifiDisplaySettings
- use ConfigureNotificationPreferernceController to replace the
sumary load in ConfigureNotificationSettings

Fixes: 141653158
Test: robolectric
Change-Id: Id5f5ed645707caa0b25ecae5252174cbf017651c

src/com/android/settings/wfd/WifiDisplayPreferenceController.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.android.settings.wfd;
+
+import android.content.Context;
+import android.media.MediaRouter;
+import android.media.MediaRouter.RouteInfo;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+public class WifiDisplayPreferenceController extends BasePreferenceController implements
+        LifecycleObserver, OnStart, OnStop {
+
+    private final MediaRouter mRouter;
+    private Preference mPreference;
+    private final MediaRouter.Callback mRouterCallback = new MediaRouter.SimpleCallback() {
+        @Override
+        public void onRouteSelected(MediaRouter router, int type, RouteInfo info) {
+            refreshSummary(mPreference);
+        }
+
+        @Override
+        public void onRouteUnselected(MediaRouter router, int type, RouteInfo info) {
+            refreshSummary(mPreference);
+        }
+
+        @Override
+        public void onRouteAdded(MediaRouter router, RouteInfo info) {
+            refreshSummary(mPreference);
+        }
+
+        @Override
+        public void onRouteRemoved(MediaRouter router, RouteInfo info) {
+            refreshSummary(mPreference);
+        }
+
+        @Override
+        public void onRouteChanged(MediaRouter router, RouteInfo info) {
+            refreshSummary(mPreference);
+        }
+    };
+
+    public WifiDisplayPreferenceController(Context context, String key) {
+        super(context, key);
+        mRouter = context.getSystemService(MediaRouter.class);
+        mRouter.setRouterGroupId(MediaRouter.MIRRORING_GROUP_ID);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return WifiDisplaySettings.isAvailable(mContext) ? AVAILABLE_UNSEARCHABLE
+                : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        CharSequence summary = mContext.getString(R.string.disconnected);
+
+        final int routeCount = mRouter.getRouteCount();
+        for (int i = 0; i < routeCount; i++) {
+            final MediaRouter.RouteInfo route = mRouter.getRouteAt(i);
+            if (route.matchesTypes(MediaRouter.ROUTE_TYPE_REMOTE_DISPLAY)
+                    && route.isSelected() && !route.isConnecting()) {
+                summary = mContext.getString(R.string.wifi_display_status_connected);
+                break;
+            }
+        }
+        return summary;
+    }
+
+    @Override
+    public void onStart() {
+        mRouter.addCallback(MediaRouter.ROUTE_TYPE_REMOTE_DISPLAY, mRouterCallback);
+    }
+
+    @Override
+    public void onStop() {
+        mRouter.removeCallback(mRouterCallback);
+    }
+}