Add summary to special app access.

Get the count of apps that has unrestricted data access and add that to
the summary for Apps & notifications -> Special app access.

Bug: 36376411
Test: make RunSettingsRoboTests
Change-Id: Id80a030e1e066f1391f94114f478091a2a87fcd8

src/com/android/settings/applications/AppAndNotificationDashboardFragment.java

@@ -25,6 +25,7 @@ import com.android.settings.core.PreferenceController;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.search.BaseSearchIndexProvider;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -55,7 +56,13 @@ public class AppAndNotificationDashboardFragment extends DashboardFragment {
 
     @Override
     protected List<PreferenceController> getPreferenceControllers(Context context) {
-        return null;
+        return buildPreferenceControllers(context);
+    }
+
+    private static List<PreferenceController> buildPreferenceControllers(Context context) {
+        final List<PreferenceController> controllers = new ArrayList<>();
+        controllers.add(new SpecialAppAccessPreferenceController(context));
+        return controllers;
     }
 
     public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
@@ -67,5 +74,10 @@ public class AppAndNotificationDashboardFragment extends DashboardFragment {
                     sir.xmlResId = R.xml.app_and_notification;
                     return Arrays.asList(sir);
                 }
+
+                @Override
+                public List<PreferenceController> getPreferenceControllers(Context context) {
+                    return buildPreferenceControllers(context);
+                }
             };
 }

src/com/android/settings/applications/SpecialAppAccessPreferenceController.java

@@ -0,0 +1,51 @@
+/*
+ * 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.applications;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import com.android.settings.R;
+import com.android.settings.core.PreferenceController;
+import com.android.settings.datausage.DataSaverBackend;
+
+public class SpecialAppAccessPreferenceController extends PreferenceController {
+
+    private static final String KEY_SPECIAL_ACCESS = "special_access";
+
+    private DataSaverBackend mDataSaverBackend;
+
+    public SpecialAppAccessPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_SPECIAL_ACCESS;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        if (mDataSaverBackend == null) {
+            mDataSaverBackend = new DataSaverBackend(mContext);
+        }
+        final int count = mDataSaverBackend.getWhitelistedCount();
+        preference.setSummary(mContext.getResources().getQuantityString(
+            R.plurals.special_access_summary, count, count));
+    }
+}

tests/robotests/src/com/android/settings/applications/SpecialAppAccessPreferenceControllerTest.java

@@ -0,0 +1,78 @@
+/*
+ * 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.applications;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import com.android.settings.R;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.datausage.DataSaverBackend;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.util.ReflectionHelpers;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class SpecialAppAccessPreferenceControllerTest {
+    private Context mContext;
+    @Mock
+    private DataSaverBackend mBackend;
+    @Mock
+    private Preference mPreference;
+
+    private SpecialAppAccessPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mController = new SpecialAppAccessPreferenceController(mContext);
+        ReflectionHelpers.setField(mController, "mDataSaverBackend", mBackend);
+    }
+
+    @Test
+    public void isAvailable_shouldAlwaysReturnTrue() {
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void updateState_shouldSetSummary() {
+        when(mBackend.getWhitelistedCount()).thenReturn(0);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setSummary(mContext.getResources().getQuantityString(
+            R.plurals.special_access_summary, 0, 0));
+
+        when(mBackend.getWhitelistedCount()).thenReturn(1);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setSummary(mContext.getResources().getQuantityString(
+            R.plurals.special_access_summary, 1, 1));
+    }
+}