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

/*
 * 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.dashboard.profileselector;

import android.annotation.IntDef;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentStatePagerAdapter;
import androidx.recyclerview.widget.RecyclerView;
import androidx.viewpager.widget.ViewPager;

import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settings.dashboard.DashboardFragment;

import com.google.android.material.tabs.TabLayout;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

/**
 * Base fragment class for profile settings.
 */
public abstract class ProfileSelectFragment extends DashboardFragment {

    private static final String TAG = "ProfileSelectFragment";

    /**
     * Denotes the profile type.
     */
    @Retention(RetentionPolicy.SOURCE)
    @IntDef({PERSONAL, WORK, ALL})
    public @interface ProfileType {
    }

    /**
     * It is personal work profile.
     */
    public static final int PERSONAL = 1;

    /**
     * It is work profile
     */
    public static final int WORK = 1 << 1;

    /**
     * It is personal and work profile
     */
    public static final int ALL = PERSONAL | WORK;

    /**
     * Used in fragment argument and pass {@link ProfileType} to it
     */
    public static final String EXTRA_PROFILE = "profile";

    private ViewGroup mContentView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        mContentView = (ViewGroup) super.onCreateView(inflater, container, savedInstanceState);

        final View tabContainer = mContentView.findViewById(R.id.tab_container);
        final ViewPager viewPager = tabContainer.findViewById(R.id.view_pager);
        viewPager.setAdapter(new ProfileSelectFragment.ViewPagerAdapter(this));
        final TabLayout tabs = tabContainer.findViewById(R.id.tabs);
        tabs.setupWithViewPager(viewPager);
        tabContainer.setVisibility(View.VISIBLE);

        final FrameLayout listContainer = mContentView.findViewById(android.R.id.list_container);
        listContainer.setLayoutParams(new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));

        final RecyclerView recyclerView = getListView();
        recyclerView.setOverScrollMode(View.OVER_SCROLL_NEVER);
        Utils.setActionBarShadowAnimation(getActivity(), getSettingsLifecycle(), recyclerView);
        return mContentView;
    }

    @Override
    public int getMetricsCategory() {
        return METRICS_CATEGORY_UNKNOWN;
    }

    /**
     * Returns an array of {@link Fragment} to display in the
     * {@link com.google.android.material.tabs.TabLayout}
     */
    public abstract Fragment[] getFragments();

    @Override
    protected int getPreferenceScreenResId() {
        return R.xml.dummy_preference_screen;
    }

    @Override
    protected String getLogTag() {
        return TAG;
    }

    static class ViewPagerAdapter extends FragmentStatePagerAdapter {

        private final Fragment[] mChildFragments;
        private final Context mContext;

        ViewPagerAdapter(ProfileSelectFragment fragment) {
            super(fragment.getChildFragmentManager());
            mContext = fragment.getContext();
            mChildFragments = fragment.getFragments();
        }

        @Override
        public Fragment getItem(int position) {
            return mChildFragments[position];
        }

        @Override
        public int getCount() {
            return mChildFragments.length;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            if (position == 0) {
                return mContext.getString(R.string.category_personal);
            } else {
                return mContext.getString(R.string.category_work);
            }
        }
    }
}