Update workprofile TabLayout for Material Next style

1. Upgrade ViewPager to ViewPager2 which provided better support.
2. Apply new TabLayout style

Bug: 193249384
Bug: 195655281
Bug: 193249173
Bug: 179738624

Test: manual

Change-Id: I905ee82f315316c2bf4b73bf5581423878e2c3e7

res/layout/preference_list_fragment.xml

@@ -20,7 +20,6 @@
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/container_material"
     android:orientation="vertical"
     android:layout_width="match_parent"
@@ -64,30 +63,15 @@
         android:visibility="gone">
 
         <com.google.android.material.tabs.TabLayout
-            android:background="@android:color/transparent"
             android:id="@+id/tabs"
-            android:layout_width="match_parent"
+            style="@style/SettingsLibTabsStyle"/>
-            android:layout_height="48dp"
-            android:layout_marginStart="24dp"
-            android:layout_marginEnd="24dp"
-            android:layout_marginTop="8dp"
-            android:layout_marginBottom="8dp"
-            android:layoutDirection="ltr"
-            app:tabMaxWidth="0dp"
-            app:tabGravity="fill"
-            app:tabMode="fixed"
-            app:tabIndicator="@drawable/tabs_indicator_background"
-            app:tabIndicatorColor="?androidprv:attr/colorAccentPrimaryVariant"
-            app:tabSelectedTextColor="@*android:color/accent_device_default"
-            app:tabTextAppearance="@style/TextAppearance.Tab"
-            app:tabTextColor="?android:attr/textColorSecondary"/>
 
-        <androidx.viewpager.widget.ViewPager
+        <androidx.viewpager2.widget.ViewPager2
             android:id="@+id/view_pager"
             android:layout_width="match_parent"
             android:layout_height="match_parent">
 
-        </androidx.viewpager.widget.ViewPager>
+        </androidx.viewpager2.widget.ViewPager2>
     </LinearLayout>
 
 </LinearLayout>

src/com/android/settings/dashboard/profileselector/ProfileSelectFragment.java

@@ -23,12 +23,9 @@ import static android.content.Intent.EXTRA_USER_ID;
 import android.annotation.IntDef;
 import android.app.Activity;
 import android.app.admin.DevicePolicyManager;
-import android.content.Context;
-import android.content.res.ColorStateList;
 import android.os.Bundle;
 import android.os.UserHandle;
 import android.os.UserManager;
-import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -37,9 +34,9 @@ import android.widget.LinearLayout;
 
 import androidx.annotation.VisibleForTesting;
 import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentStatePagerAdapter;
 import androidx.recyclerview.widget.RecyclerView;
-import androidx.viewpager.widget.ViewPager;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+import androidx.viewpager2.widget.ViewPager2;
 
 import com.android.settings.R;
 import com.android.settings.SettingsActivity;
@@ -47,10 +44,10 @@ import com.android.settings.Utils;
 import com.android.settings.dashboard.DashboardFragment;
 
 import com.google.android.material.tabs.TabLayout;
+import com.google.android.material.tabs.TabLayoutMediator;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
-import java.util.Locale;
 
 /**
  * Base fragment class for profile settings.
@@ -111,14 +108,15 @@ public abstract class ProfileSelectFragment extends DashboardFragment {
         if (titleResId > 0) {
             activity.setTitle(titleResId);
         }
-        final int selectedTab = convertPosition(getTabId(activity, getArguments()));
+        final int selectedTab = getTabId(activity, getArguments());
 
         final View tabContainer = mContentView.findViewById(R.id.tab_container);
-        final ViewPager viewPager = tabContainer.findViewById(R.id.view_pager);
+        final ViewPager2 viewPager = tabContainer.findViewById(R.id.view_pager);
         viewPager.setAdapter(new ProfileSelectFragment.ViewPagerAdapter(this));
         final TabLayout tabs = tabContainer.findViewById(R.id.tabs);
-        tabs.setupWithViewPager(viewPager);
+        new TabLayoutMediator(tabs, viewPager,
-        setupTabTextColor(tabs);
+                (tab, position) -> tab.setText(getPageTitle(position))
+        ).attach();
         tabContainer.setVisibility(View.VISIBLE);
         final TabLayout.Tab tab = tabs.getTabAt(selectedTab);
         tab.select();
@@ -135,30 +133,6 @@ public abstract class ProfileSelectFragment extends DashboardFragment {
         return mContentView;
     }
 
-    /**
-     * TabLayout uses ColorStateList of 2 states, selected state and empty state.
-     * It's expected to use textColorSecondary default state color as empty state tabTextColor.
-     *
-     * However, TabLayout uses textColorSecondary by a not expected state.
-     * This method sets tabTextColor with the color of expected textColorSecondary state.
-     */
-    private void setupTabTextColor(TabLayout tabLayout) {
-        final ColorStateList defaultColorStateList = tabLayout.getTabTextColors();
-        final ColorStateList resultColorStateList = new ColorStateList(
-                new int[][]{
-                    new int[]{android.R.attr.state_selected},
-                    new int[]{}
-                },
-                new int[] {
-                    defaultColorStateList.getColorForState(new int[]{android.R.attr.state_selected},
-                            Utils.getColorAttrDefaultColor(getContext(),
-                            com.android.internal.R.attr.colorAccentPrimaryVariant)),
-                    Utils.getColorAttrDefaultColor(getContext(), android.R.attr.textColorSecondary)
-                }
-        );
-        tabLayout.setTabTextColors(resultColorStateList);
-    }
-
     @Override
     public int getMetricsCategory() {
         return METRICS_CATEGORY_UNKNOWN;
@@ -210,47 +184,36 @@ public abstract class ProfileSelectFragment extends DashboardFragment {
         return PERSONAL_TAB;
     }
 
-    static class ViewPagerAdapter extends FragmentStatePagerAdapter {
+    private CharSequence getPageTitle(int position) {
+        final DevicePolicyManager devicePolicyManager =
+                getContext().getSystemService(DevicePolicyManager.class);
+
+        if (position == WORK_TAB) {
+            return devicePolicyManager.getString(WORK_CATEGORY_HEADER,
+                    () -> getContext().getString(R.string.category_work));
+        }
+
+        return devicePolicyManager.getString(PERSONAL_CATEGORY_HEADER,
+                () -> getContext().getString(R.string.category_personal));
+    }
+
+    static class ViewPagerAdapter extends FragmentStateAdapter {
 
         private final Fragment[] mChildFragments;
-        private final Context mContext;
 
         ViewPagerAdapter(ProfileSelectFragment fragment) {
-            super(fragment.getChildFragmentManager());
+            super(fragment);
-            mContext = fragment.getContext();
             mChildFragments = fragment.getFragments();
         }
 
         @Override
-        public Fragment getItem(int position) {
+        public Fragment createFragment(int position) {
-            return mChildFragments[convertPosition(position)];
+            return mChildFragments[position];
         }
 
         @Override
-        public int getCount() {
+        public int getItemCount() {
             return mChildFragments.length;
         }
-
-        @Override
-        public CharSequence getPageTitle(int position) {
-            DevicePolicyManager devicePolicyManager =
-                    mContext.getSystemService(DevicePolicyManager.class);
-
-            if (convertPosition(position) == WORK_TAB) {
-                return devicePolicyManager.getString(WORK_CATEGORY_HEADER,
-                        () -> mContext.getString(R.string.category_work));
-            }
-
-            return devicePolicyManager.getString(PERSONAL_CATEGORY_HEADER,
-                    () -> mContext.getString(R.string.category_personal));
-        }
-    }
-
-    private static int convertPosition(int index) {
-        if (TextUtils.getLayoutDirectionFromLocale(Locale.getDefault())
-                == View.LAYOUT_DIRECTION_RTL) {
-            return 1 - index;
-        }
-        return index;
     }
 }