Update SettingsPanel UI

UI changes include:
- RecyclerView to host slices
- Font family to headline font
- Title is now centered
- Added SeeMore & Done buttons
- Horizontal Dividers between slices
- Indented Slices
- Landscape layout is fullscreen

Change-Id: I3549c847fc88edd81f670ddfa2907dd3741441e0
Screenshot: https://screenshot.googleplex.com/RzWktzOZJkc
Test: Robolectric
Test: Manual app
Bug: 118622007

src/com/android/settings/panel/InternetConnectivityPanel.java

@@ -19,6 +19,7 @@ package com.android.settings.panel;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.provider.Settings;
 
 import com.android.settings.R;
 import com.android.settings.slices.CustomSliceRegistry;
@@ -60,6 +61,6 @@ public class InternetConnectivityPanel implements PanelContent {
 
     @Override
     public Intent getSeeMoreIntent() {
-        return null;
+        return new Intent(Settings.ACTION_WIRELESS_SETTINGS);
     }
 }

src/com/android/settings/panel/PanelFragment.java

@@ -16,19 +16,20 @@
 
 package com.android.settings.panel;
 
-import android.net.Uri;
+import android.content.Intent;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import android.widget.LinearLayout;
+import android.widget.Button;
+import android.widget.TextView;
 
-import androidx.lifecycle.LiveData;
-import androidx.slice.Slice;
-import androidx.slice.widget.SliceLiveData;
-import androidx.slice.widget.SliceView;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.settings.R;
 
 import androidx.annotation.NonNull;
@@ -38,20 +39,24 @@ import androidx.fragment.app.FragmentActivity;
 
 import com.android.settings.overlay.FeatureFactory;
 
-import java.util.ArrayList;
-import java.util.List;
-
 public class PanelFragment extends Fragment {
 
     private static final String TAG = "PanelFragment";
 
-    private List<SliceView> mSliceViewList;
-    private List<LiveData<Slice>> mSliceDataList;
-    private LinearLayout mPanelLayout;
+    private TextView mTitleView;
+    private Button mSeeMoreButton;
+    private Button mDoneButton;
+    private RecyclerView mPanelSlices;
+
+    @VisibleForTesting
+    PanelSlicesAdapter mAdapter;
+
+    private View.OnClickListener mDoneButtonListener = (v) -> {
+        Log.d(TAG, "Closing dialog");
+        getActivity().finish();
+    };
 
     public PanelFragment() {
-        mSliceViewList = new ArrayList<>();
-        mSliceDataList = new ArrayList<>();
     }
 
     @Nullable
@@ -61,28 +66,37 @@ public class PanelFragment extends Fragment {
         final FragmentActivity activity = getActivity();
         final View view = inflater.inflate(R.layout.panel_layout, container, false);
 
-        mPanelLayout = view.findViewById(R.id.panel_parent_layout);
-        final Bundle arguments = getArguments();
+        mPanelSlices = view.findViewById(R.id.panel_parent_layout);
+        mSeeMoreButton = view.findViewById(R.id.see_more);
+        mDoneButton = view.findViewById(R.id.done);
+        mTitleView = view.findViewById(R.id.title);
 
+        final Bundle arguments = getArguments();
         final String panelType = arguments.getString(SettingsPanelActivity.KEY_PANEL_TYPE_ARGUMENT);
 
         final PanelContent panel = FeatureFactory.getFactory(activity)
                 .getPanelFeatureProvider()
                 .getPanel(activity, panelType);
 
-        activity.setTitle(panel.getTitle());
+        mAdapter = new PanelSlicesAdapter(this, panel.getSlices());
 
+        mPanelSlices.setHasFixedSize(true);
+        mPanelSlices.setLayoutManager(new LinearLayoutManager((activity)));
+        mPanelSlices.setAdapter(mAdapter);
 
-        for (Uri uri : panel.getSlices()) {
-            final SliceView sliceView = new SliceView(activity);
-            mPanelLayout.addView(sliceView);
-            final LiveData<Slice> liveData = SliceLiveData.fromUri(activity, uri);
-            liveData.observe(this /* lifecycleOwner */, sliceView);
+        mTitleView.setText(panel.getTitle());
 
-            mSliceDataList.add(liveData);
-            mSliceViewList.add(sliceView);
-        }
+        mSeeMoreButton.setOnClickListener(getSeeMoreListener(panel.getSeeMoreIntent()));
+        mDoneButton.setOnClickListener(mDoneButtonListener);
 
         return view;
     }
+
+    private View.OnClickListener getSeeMoreListener(final Intent intent) {
+        return (v) -> {
+            final FragmentActivity activity = getActivity();
+            activity.startActivity(intent);
+            activity.finish();
+        };
+    }
 }

src/com/android/settings/panel/PanelSlicesAdapter.java

@@ -0,0 +1,100 @@
+/*
+ * 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.panel;
+
+import android.content.Context;
+import android.net.Uri;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.LiveData;
+import androidx.recyclerview.widget.RecyclerView;
+import androidx.slice.Slice;
+import androidx.slice.widget.SliceLiveData;
+import androidx.slice.widget.SliceView;
+
+import com.android.settings.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * RecyclerView adapter for Slices in Settings Panels.
+ */
+public class PanelSlicesAdapter
+        extends RecyclerView.Adapter<PanelSlicesAdapter.SliceRowViewHolder> {
+
+    private final List<Uri> mSliceUris;
+    private final PanelFragment mPanelFragment;
+
+    public PanelSlicesAdapter(PanelFragment fragment, List<Uri> sliceUris) {
+        mPanelFragment = fragment;
+        mSliceUris = new ArrayList<>(sliceUris);
+    }
+
+    @NonNull
+    @Override
+    public SliceRowViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int viewType) {
+        final Context context = viewGroup.getContext();
+        final LayoutInflater inflater = LayoutInflater.from(context);
+        final View view = inflater.inflate(R.layout.panel_slice_row, viewGroup, false);
+
+        return new SliceRowViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull SliceRowViewHolder sliceRowViewHolder, int position) {
+        sliceRowViewHolder.onBind(mPanelFragment, mSliceUris.get(position));
+    }
+
+    @Override
+    public int getItemCount() {
+        return mSliceUris.size();
+    }
+
+    @VisibleForTesting
+    List<Uri> getData() {
+        return mSliceUris;
+    }
+
+    /**
+     * ViewHolder for binding Slices to SliceViews.
+     */
+    public static class SliceRowViewHolder extends RecyclerView.ViewHolder {
+
+        @VisibleForTesting
+        LiveData<Slice> sliceLiveData;
+
+        @VisibleForTesting
+        final SliceView sliceView;
+
+        public SliceRowViewHolder(View view) {
+            super(view);
+            sliceView = view.findViewById(R.id.slice_view);
+            sliceView.setMode(SliceView.MODE_LARGE);
+        }
+
+        public void onBind(PanelFragment fragment, Uri sliceUri) {
+            final Context context = sliceView.getContext();
+            sliceLiveData = SliceLiveData.fromUri(context, sliceUri);
+            sliceLiveData.observe(fragment.getViewLifecycleOwner(), sliceView);
+        }
+    }
+}