Display recent location access in the widget

Bug: 120239674
Test: manually
Change-Id: Iaf899486bf27c55189eea4c0e913ff1baaf529e5

src/com/android/settings/location/RecentLocationAccessPreferenceController.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2017 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.location;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.Intent;
+import android.view.View;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.location.RecentLocationAccesses;
+import com.android.settingslib.widget.AppEntitiesHeaderController;
+import com.android.settingslib.widget.LayoutPreference;
+
+import java.util.List;
+
+public class RecentLocationAccessPreferenceController extends AbstractPreferenceController
+        implements PreferenceControllerMixin {
+    /** Key for the recent location apps dashboard */
+    private static final String KEY_APPS_DASHBOARD = "apps_dashboard";
+    private final RecentLocationAccesses mRecentLocationAccesses;
+    private AppEntitiesHeaderController mController;
+    private static final int MAXIMUM_APP_COUNT = 3;
+
+    public RecentLocationAccessPreferenceController(Context context) {
+        this(context, new RecentLocationAccesses(context));
+    }
+
+    @VisibleForTesting
+    RecentLocationAccessPreferenceController(Context context,
+            RecentLocationAccesses recentAccesses) {
+        super(context);
+        mRecentLocationAccesses = recentAccesses;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_APPS_DASHBOARD;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final LayoutPreference preference = (LayoutPreference) screen.findPreference(
+                KEY_APPS_DASHBOARD);
+        final View view = preference.findViewById(R.id.app_entities_header);
+        mController = AppEntitiesHeaderController.newInstance(mContext, view)
+                .setHeaderTitleRes(R.string.location_category_recent_location_access)
+                .setHeaderDetailsRes(R.string.location_recent_location_access_view_details)
+                .setHeaderDetailsClickListener((View v) -> {
+                    final Intent intent = new Intent(Intent.ACTION_REVIEW_PERMISSION_USAGE);
+                    intent.putExtra(Intent.EXTRA_PERMISSION_NAME,
+                            Manifest.permission.ACCESS_FINE_LOCATION);
+                    mContext.startActivity(intent);
+                });
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        updateRecentApps();
+    }
+
+    private void updateRecentApps() {
+        final List<RecentLocationAccesses.Access> recentLocationAccesses =
+                mRecentLocationAccesses.getAppListSorted();
+        if (recentLocationAccesses.size() > 0) {
+            // Display the top 3 preferences to container in original order.
+            int i = 0;
+            for (; i < Math.min(recentLocationAccesses.size(), MAXIMUM_APP_COUNT); i++) {
+                final RecentLocationAccesses.Access access = recentLocationAccesses.get(i);
+                mController.setAppEntity(i, access.icon, access.label, access.contentDescription);
+            }
+            for (; i < MAXIMUM_APP_COUNT; i++) {
+                mController.removeAppEntity(i);
+            }
+        } else {
+            // If there's no item to display, add a "No recent apps" item.
+        }
+        mController.apply();
+    }
+}