Adding slice for Face Enrollment

Fixes: 134965754
Test: Verified slice appears when not enrolled.
Test: Verified slice does not appear when enrolled.
Test: Verified slice disappears after clicking on icon and going back
to settings page.
Change-Id: Id1c4458742ab622df8d5881e926fe54684b36843

src/com/android/settings/homepage/contextualcards/slices/FaceSetupSlice.java

@@ -0,0 +1,104 @@
+/*
+ * 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.homepage.contextualcards.slices;
+
+
+import static android.hardware.biometrics.BiometricConstants.BIOMETRIC_SUCCESS;
+
+import android.app.PendingIntent;
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.hardware.biometrics.BiometricManager;
+import android.net.Uri;
+
+import androidx.core.graphics.drawable.IconCompat;
+import androidx.slice.Slice;
+import androidx.slice.builders.ListBuilder;
+import androidx.slice.builders.ListBuilder.RowBuilder;
+import androidx.slice.builders.SliceAction;
+
+import com.android.settings.R;
+import com.android.settings.SubSettings;
+import com.android.settings.Utils;
+import com.android.settings.biometrics.face.FaceProfileStatusPreferenceController;
+import com.android.settings.security.SecuritySettings;
+import com.android.settings.slices.CustomSliceRegistry;
+import com.android.settings.slices.CustomSliceable;
+import com.android.settings.slices.SliceBuilderUtils;
+
+public class FaceSetupSlice implements CustomSliceable {
+
+    private final Context mContext;
+
+    public FaceSetupSlice(Context context) {
+        mContext = context;
+    }
+
+    @Override
+    public Slice getSlice() {
+        final BiometricManager biometricManager = mContext.getSystemService(BiometricManager.class);
+        final PackageManager packageManager = mContext.getPackageManager();
+        if (!packageManager.hasSystemFeature(PackageManager.FEATURE_FACE)) {
+            // no face hardware
+            return null;
+        } else if (biometricManager.canAuthenticate() == BIOMETRIC_SUCCESS) {
+            // face hardware, and already enrolled
+            return null;
+        }
+
+        final CharSequence title = mContext.getText(
+                R.string.security_settings_face_settings_enroll);
+        final ListBuilder listBuilder = new ListBuilder(mContext,
+                CustomSliceRegistry.FACE_ENROLL_SLICE_URI, ListBuilder.INFINITY)
+                .setAccentColor(Utils.getColorAccentDefaultColor(mContext));
+        final IconCompat icon = IconCompat.createWithResource(mContext, R.drawable.ic_face_24dp);
+        return listBuilder
+                .addRow(buildRowBuilder(title,
+                        mContext.getText(R.string.security_settings_face_settings_context_subtitle),
+                        icon, mContext, getIntent()))
+                .build();
+    }
+
+    @Override
+    public Uri getUri() {
+        return CustomSliceRegistry.FACE_ENROLL_SLICE_URI;
+    }
+
+    @Override
+    public Intent getIntent() {
+        return SliceBuilderUtils.buildSearchResultPageIntent(mContext,
+                SecuritySettings.class.getName(),
+                FaceProfileStatusPreferenceController.KEY_FACE_SETTINGS,
+                mContext.getText(R.string.security_settings_face_settings_enroll).toString(),
+                SettingsEnums.SLICE)
+                .setClassName(mContext.getPackageName(), SubSettings.class.getName());
+    }
+
+    private static RowBuilder buildRowBuilder(CharSequence title, CharSequence subTitle,
+            IconCompat icon, Context context, Intent intent) {
+        final SliceAction primarySliceAction = SliceAction.createDeeplink(
+                PendingIntent.getActivity(context, 0, intent, 0), icon, ListBuilder.ICON_IMAGE,
+                title);
+        return new RowBuilder()
+                .setTitleItem(icon, ListBuilder.ICON_IMAGE)
+                .setTitle(title)
+                .setSubtitle(subTitle)
+                .setPrimaryAction(primarySliceAction);
+    }
+}