TubeLab-App-Android/app/src/google_donation/java/app/fedilab/fedilabtube/DonationActivity.java

package app.fedilab.fedilabtube;
/* Copyright 2021 Thomas Schneider
 *
 * This file is a part of TubeLab
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * TubeLab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with TubeLab; if not,
 * see <http://www.gnu.org/licenses>. */

import android.content.Intent;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentStatePagerAdapter;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;

import com.anjlab.android.iab.v3.BillingProcessor;
import com.anjlab.android.iab.v3.TransactionDetails;
import com.google.android.material.tabs.TabLayout;

import org.jetbrains.annotations.NotNull;

import app.fedilab.fedilabtube.databinding.ActivityDonationBinding;
import app.fedilab.fedilabtube.fragment.DonationsFragment;
import app.fedilab.fedilabtube.fragment.MyDonationsFragment;


public class DonationActivity extends AppCompatActivity implements BillingProcessor.IBillingHandler {

    BillingProcessor bp;
    DonationsFragment donationsFragment;
    MyDonationsFragment myDonationsFragment;
    private ActivityDonationBinding binding;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ActivityDonationBinding.inflate(getLayoutInflater());
        View view = binding.getRoot();
        setContentView(view);
        bp = new BillingProcessor(this, getString(R.string.google_key), this);
        bp.initialize();
        if (getSupportActionBar() != null)
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        donationsFragment = new DonationsFragment();
        myDonationsFragment = new MyDonationsFragment();

        binding.tablayout.addTab(binding.tablayout.newTab().setText(getString(R.string.donate)));
        binding.tablayout.addTab(binding.tablayout.newTab().setText(getString(R.string.my_donations)));
        binding.viewpager.setOffscreenPageLimit(2);

        PagerAdapter mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
        binding.viewpager.setAdapter(mPagerAdapter);
        binding.viewpager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                TabLayout.Tab tab = binding.tablayout.getTabAt(position);
                if (tab != null)
                    tab.select();
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

        binding.tablayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                binding.viewpager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {
            }
        });

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onProductPurchased(@NotNull String productId, TransactionDetails details) {

    }

    @Override
    public void onPurchaseHistoryRestored() {

    }

    @Override
    public void onBillingError(int errorCode, Throwable error) {

    }

    @Override
    public void onBillingInitialized() {
        donationsFragment.initialized(bp);
        myDonationsFragment.initialized(bp);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (!bp.handleActivityResult(requestCode, resultCode, data)) {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }

    /**
     * Pager adapter for the 2 fragments
     */
    private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {

        ScreenSlidePagerAdapter(FragmentManager fm) {
            super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
        }

        @NotNull
        @Override
        public Fragment getItem(int position) {
            if (position == 0) {
                return donationsFragment;
            } else {
                return myDonationsFragment;
            }
        }


        @Override
        public int getCount() {
            return 2;
        }
    }
}