5/n: Add face settings

This change connects the face status preference controller with the
settings fragment/activity. This change also implements the basic settings
page showing a video, a toggle for keyguard, improve/remove targets,
and footer.

Bug: 111321762

Test: manual
Change-Id: Ifc65f5acbf6551679074df63ef22ffba75229f37

src/com/android/settings/biometrics/face/FaceSettings.java

@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2018 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.biometrics.face;
+
+import static com.android.settings.biometrics.BiometricEnrollBase.CONFIRM_REQUEST;
+
+import android.content.Context;
+import android.hardware.face.FaceManager;
+import android.os.Bundle;
+import android.provider.SearchIndexableResource;
+import android.util.Log;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.Utils;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.password.ChooseLockSettingsHelper;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.search.SearchIndexable;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Settings screen for face authentication.
+ */
+@SearchIndexable
+public class FaceSettings extends DashboardFragment {
+
+    private static final String TAG = "FaceSettings";
+    private static final String KEY_LAUNCHED_CONFIRM = "key_launched_confirm";
+
+    private boolean mLaunchedConfirm;
+
+    public static boolean isAvailable(Context context) {
+        FaceManager manager = Utils.getFaceManagerOrNull(context);
+        return manager != null && manager.isHardwareDetected();
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.FACE;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.security_settings_face;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putBoolean(KEY_LAUNCHED_CONFIRM, mLaunchedConfirm);
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if (savedInstanceState != null) {
+            mLaunchedConfirm = savedInstanceState.getBoolean(KEY_LAUNCHED_CONFIRM, false);
+        }
+
+        if (!mLaunchedConfirm) {
+            ChooseLockSettingsHelper helper = new ChooseLockSettingsHelper(getActivity(), this);
+            if (!helper.launchConfirmationActivity(CONFIRM_REQUEST,
+                    getString(R.string.security_settings_face_preference_title))) {
+                Log.e(TAG, "Password not set");
+                finish();
+            }
+        }
+    }
+
+    @Override
+    protected List<AbstractPreferenceController> createPreferenceControllers(Context context) {
+        return buildPreferenceControllers(context, getSettingsLifecycle());
+    }
+
+    private static List<AbstractPreferenceController> buildPreferenceControllers(Context context,
+            Lifecycle lifecycle) {
+        final List<AbstractPreferenceController> controllers = new ArrayList<>();
+        controllers.add(new FaceSettingsVideoPreferenceController(context));
+        controllers.add(new FaceSettingsImprovePreferenceController(context));
+        controllers.add(new FaceSettingsUnlockPreferenceController(context));
+        controllers.add(new FaceSettingsRemoveButtonPreferenceController(context));
+        controllers.add(new FaceSettingsFooterPreferenceController(context));
+        return controllers;
+    }
+
+    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider() {
+                @Override
+                public List<SearchIndexableResource> getXmlResourcesToIndex(
+                        Context context, boolean enabled) {
+                    final SearchIndexableResource sir = new SearchIndexableResource(context);
+                    sir.xmlResId = R.xml.security_settings_face;
+                    return Arrays.asList(sir);
+                }
+
+                @Override
+                public List<AbstractPreferenceController> createPreferenceControllers(
+                        Context context) {
+                    return buildPreferenceControllers(context, null /* lifecycle */);
+                }
+
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    return isAvailable(context);
+                }
+            };
+
+}