Twilight Location off text

When location is disabled, dark theme and night light
will show text and button to take the user to location page

Fixes: 153115261
Fixes: 153115618
Test: manually turn off location and observe view
Change-Id: I24be2f26a4c9e1b3f2a17e83e6f91cb7685f2e28

src/com/android/settings/display/TwilightLocationPreferenceController.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2020 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.display;
+
+import android.content.Context;
+import android.content.Intent;
+import android.location.LocationManager;
+import android.view.View;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.Settings;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.overlay.FeatureFactory;
+import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
+import com.android.settingslib.widget.LayoutPreference;
+
+/**
+ * Controller to take the user to location settings page
+ */
+public class TwilightLocationPreferenceController extends BasePreferenceController {
+    private final LocationManager mLocationManager;
+    private final MetricsFeatureProvider mMetricsFeatureProvider;
+
+    public TwilightLocationPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mLocationManager = context.getSystemService(LocationManager.class);
+        mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final LayoutPreference preference = screen.findPreference(getPreferenceKey());
+        final View button = preference.findViewById(R.id.go_to_location_setting);
+        button.setOnClickListener(v -> {
+            mMetricsFeatureProvider.logClickedPreference(preference, getMetricsCategory());
+            final Intent intent = new Intent();
+            intent.setClass(mContext, Settings.LocationSettingsActivity.class);
+            mContext.startActivity(intent);
+        });
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        preference.setVisible(!mLocationManager.isLocationEnabled());
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE_UNSEARCHABLE;
+    }
+}

src/com/android/settings/display/darkmode/DarkModeSettingsFragment.java

@@ -37,7 +37,7 @@ import java.util.List;
 @SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
 public class DarkModeSettingsFragment extends DashboardFragment {
 
-    private static final String TAG = "DarkModeSettingsFragment";
+    private static final String TAG = "DarkModeSettingsFrag";
     private static final String DARK_THEME_END_TIME = "dark_theme_end_time";
     private static final String DARK_THEME_START_TIME = "dark_theme_start_time";
     private DarkModeObserver mContentObserver;