Build infra to inject slice to PreferenceFragment

Reuse the PreferenceController and LayoutPreference however create
specific one for slice:
1. SlicePreference: container to inject slice view
2. SlicePreferenceController: handle updates for slice

Also add styles for it with default layout.

Bug: 120803703
Test: RunSettingsRoboTests

Change-Id: I6ab083ad57117e6198dcba37702a25213da78719

res/layout/slice_preference_layout.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  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.
+  -->
+
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center_vertical"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd">
+    <androidx.slice.widget.SliceView
+        android:id="@+id/slice_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"/>
+</FrameLayout>

res/values/attrs.xml

@@ -52,6 +52,8 @@
 
     <attr name="apnPreferenceStyle" format="reference" />
 
+    <attr name="slicePreferenceStyle" format="reference" />
+
     <attr name="footerPreferenceStyle" format="reference" />
 
     <declare-styleable name="FixedLineSummaryPreference">

res/values/styles.xml

@@ -489,4 +489,8 @@
         <item name="android:textAllCaps">false</item>
     </style>
 
+    <style name="Widget.SliceView.Settings">
+        <item name="titleSize">@*android:dimen/text_size_subhead_material</item>
+    </style>
+
 </resources>

res/values/styles_preference.xml

@@ -21,6 +21,7 @@
 
     <style name="PreferenceTheme" parent="@style/PreferenceThemeOverlay.SettingsBase">
         <item name="apnPreferenceStyle">@style/ApnPreference</item>
+        <item name="slicePreferenceStyle">@style/SlicePreference</item>
         <item name="seekBarPreferenceStyle">@style/SettingsSeekBarPreference</item>
         <item name="twoStateButtonPreferenceStyle">@style/TwoStateButtonPreference</item>
     </style>
@@ -34,6 +35,10 @@
         <item name="android:layout">@layout/apn_preference_layout</item>
     </style>
 
+    <style name="SlicePreference" parent="@style/Preference.Material">
+        <item name="android:layout">@layout/slice_preference_layout</item>
+    </style>
+
     <style name="SettingsSeekBarPreference" parent="@style/Preference.Material">
         <item name="android:layout">@layout/preference_widget_seekbar_settings</item>
     </style>

res/values/themes.xml

@@ -58,6 +58,9 @@
         <!-- TODO(118444000): Remove colorPrimary and colorPrimaryVariant -->
         <item name="colorPrimary">@*android:color/primary_device_default_settings_light</item>
         <item name="colorPrimaryVariant">@android:color/white</item>
+
+        <!-- For slice view in settings -->
+        <item name="sliceViewStyle">@style/Widget.SliceView.Settings</item>
     </style>
 
     <!-- Variant of the settings theme with no action bar. -->

res/xml/bluetooth_device_details_fragment.xml

@@ -26,7 +26,14 @@
         settings:allowDividerBelow="true"/>
 
     <com.android.settingslib.widget.ActionButtonsPreference
-        android:key="action_buttons" />
+        android:key="action_buttons"
+        settings:allowDividerBelow="true"/>
+
+    <com.android.settings.slices.SlicePreference
+        android:key="bt_device_slice"
+        settings:controller="com.android.settings.slices.SlicePreferenceController"
+        settings:allowDividerBelow="true"
+        settings:allowDividerAbove="true"/>
 
     <PreferenceCategory
         android:key="bluetooth_profiles"/>

src/com/android/settings/DisplaySettings.java

@@ -32,7 +32,6 @@ import com.android.settings.display.TapToWakePreferenceController;
 import com.android.settings.display.ThemePreferenceController;
 import com.android.settings.display.TimeoutPreferenceController;
 import com.android.settings.display.VrDisplayPreferenceController;
-import com.android.settings.display.WallpaperPreferenceController;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.search.Indexable;
 import com.android.settingslib.core.AbstractPreferenceController;

src/com/android/settings/bluetooth/BluetoothDeviceDetailsFragment.java

@@ -19,14 +19,19 @@ package com.android.settings.bluetooth;
 import static android.os.UserManager.DISALLOW_CONFIG_BLUETOOTH;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.ContentResolver;
 import android.content.Context;
+import android.net.Uri;
 import android.os.Bundle;
+import android.util.FeatureFlagUtils;
 
 import androidx.annotation.VisibleForTesting;
 
 import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.R;
+import com.android.settings.core.FeatureFlags;
 import com.android.settings.dashboard.RestrictedDashboardFragment;
+import com.android.settings.slices.SlicePreferenceController;
 import com.android.settingslib.bluetooth.CachedBluetoothDevice;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 import com.android.settingslib.core.AbstractPreferenceController;
@@ -98,6 +103,15 @@ public class BluetoothDeviceDetailsFragment extends RestrictedDashboardFragment
         mManager = getLocalBluetoothManager(context);
         mCachedDevice = getCachedDevice(mDeviceAddress);
         super.onAttach(context);
+
+        if (FeatureFlagUtils.isEnabled(context, FeatureFlags.SLICE_INJECTION)) {
+            //TODO(b/120803703): update it to get data from feature provider
+            use(SlicePreferenceController.class).setSliceUri(new Uri.Builder()
+                    .scheme(ContentResolver.SCHEME_CONTENT)
+                    .authority("com.google.android.apps.wearables.maestro.companion")
+                    .appendPath("setting_slice")
+                    .build());
+        }
     }
 
     @Override

src/com/android/settings/slices/SlicePreference.java

@@ -0,0 +1,48 @@
+/*
+ * 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.slices;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import androidx.slice.Slice;
+import androidx.slice.widget.SliceView;
+
+import com.android.settings.R;
+import com.android.settingslib.widget.LayoutPreference;
+
+/**
+ * Preference for {@link SliceView}
+ */
+public class SlicePreference extends LayoutPreference {
+    private SliceView mSliceView;
+
+    public SlicePreference(Context context, AttributeSet attrs) {
+        super(context, attrs, R.attr.slicePreferenceStyle);
+        mSliceView = findViewById(R.id.slice_view);
+    }
+
+    public SlicePreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, R.attr.slicePreferenceStyle);
+        mSliceView = findViewById(R.id.slice_view);
+    }
+
+    public void onSliceUpdated(Slice slice) {
+        mSliceView.onChanged(slice);
+        notifyChanged();
+    }
+}

src/com/android/settings/slices/SlicePreferenceController.java

@@ -0,0 +1,89 @@
+/*
+ * 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.slices;
+
+import android.content.Context;
+import android.net.Uri;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.Observer;
+import androidx.preference.PreferenceScreen;
+import androidx.slice.Slice;
+import androidx.slice.widget.SliceLiveData;
+import androidx.slice.widget.SliceView;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+/**
+ * Default {@link BasePreferenceController} for {@link SliceView}. It will take {@link Uri} for
+ * Slice and display what's inside this {@link Uri}
+ */
+public class SlicePreferenceController extends BasePreferenceController implements
+        LifecycleObserver, OnStart, OnStop, Observer<Slice> {
+    @VisibleForTesting
+    LiveData<Slice> mLiveData;
+    private SlicePreference mSlicePreference;
+    private Uri mUri;
+
+    public SlicePreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        mSlicePreference = (SlicePreference) screen.findPreference(
+                getPreferenceKey());
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return mUri != null ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    public void setSliceUri(Uri uri) {
+        mUri = uri;
+        mLiveData = SliceLiveData.fromUri(mContext, mUri);
+
+        //TODO(b/120803703): figure out why we need to remove observer first
+        mLiveData.removeObserver(this);
+    }
+
+    @Override
+    public void onStart() {
+        if (mLiveData != null) {
+            mLiveData.observeForever(this);
+        }
+    }
+
+    @Override
+    public void onStop() {
+        if (mLiveData != null) {
+            mLiveData.removeObserver(this);
+        }
+    }
+
+    @Override
+    public void onChanged(Slice slice) {
+        mSlicePreference.onSliceUpdated(slice);
+    }
+}

tests/robotests/src/com/android/settings/slices/SlicePreferenceControllerTest.java

@@ -0,0 +1,81 @@
+/*
+ * 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.slices;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.net.Uri;
+
+import androidx.lifecycle.LiveData;
+import androidx.slice.Slice;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class SlicePreferenceControllerTest {
+    private static final String KEY = "slice_preference_key";
+
+    @Mock
+    private LiveData<Slice> mLiveData;
+    private Context mContext;
+    private SlicePreferenceController mController;
+    private Uri mUri;
+
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = spy(RuntimeEnvironment.application);
+        mController = new SlicePreferenceController(mContext, KEY);
+        mController.mLiveData = mLiveData;
+        mUri = Uri.EMPTY;
+    }
+
+    @Test
+    public void isAvailable_uriNull_returnFalse() {
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_uriNotNull_returnTrue() {
+        mController.setSliceUri(mUri);
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void onStart_registerObserver() {
+        mController.onStart();
+        verify(mLiveData).observeForever(mController);
+    }
+
+    @Test
+    public void onStop_unregisterObserver() {
+        mController.onStop();
+        verify(mLiveData).removeObserver(mController);
+    }
+}