MoreHolder.java

package com.wangdaye.mysplash.photo.view.holder;

import android.annotation.SuppressLint;
import android.support.annotation.Nullable;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import com.pixelcan.inkpageindicator.InkPageIndicator;
import com.wangdaye.mysplash.R;
import com.wangdaye.mysplash.common.data.entity.unsplash.Photo;
import com.wangdaye.mysplash.common._basic.MysplashActivity;
import com.wangdaye.mysplash.common.ui.adapter.MyPagerAdapter;
import com.wangdaye.mysplash.common.ui.adapter.PhotoInfoAdapter;
import com.wangdaye.mysplash.common.utils.DisplayUtils;
import com.wangdaye.mysplash.common.utils.helper.ImageHelper;
import com.wangdaye.mysplash.common.utils.helper.IntentHelper;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * More holder.
 *
 * This view holder is used to show related photos and collections information.
 *
 * */

public class MoreHolder extends PhotoInfoAdapter.ViewHolder
        implements ViewPager.OnPageChangeListener {

    @BindView(R.id.item_photo_more_viewPager)
    ViewPager viewPager;

    @BindView(R.id.item_photo_more_indicator)
    InkPageIndicator indicator;

    private ImageView[] covers;
    private TextView[] titles;

    private MoreHolderModel model;

    public static final int TYPE_MORE = 7;

    public static class MoreHolderModel {

        int position;
        int totalPage;
        Boolean[] hasFadedIn;

        MoreHolderModel(Photo photo) {
            position = 0;
            totalPage = photo.related_collections.results.size();
            hasFadedIn = new Boolean[totalPage];
            for (int i = 0; i < hasFadedIn.length; i ++) {
                hasFadedIn[i] = false;
            }
        }
    }

    public MoreHolder(View itemView, Photo photo, @Nullable MoreHolderModel model) {
        super(itemView);
        ButterKnife.bind(this, itemView);
        if (model == null) {
            model = new MoreHolderModel(photo);
        }
        this.model = model;
        this.covers = new ImageView[model.totalPage];
        this.titles = new TextView[model.totalPage];
    }

    @SuppressLint("InflateParams")
    @Override
    protected void onBindView(final MysplashActivity a, final Photo photo) {
        int size = photo.related_collections.results.size();
        List<View> viewList = new ArrayList<>(size);
        List<String> titleList = new ArrayList<>(size);
        for (int i = 0; i < size; i ++) {
            final int finalI = i;
            View view = LayoutInflater.from(a).inflate(R.layout.item_photo_more_page_vertical, null);
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    IntentHelper.startCollectionActivity(
                            a, photo.related_collections.results.get(finalI));
                }
            });

            covers[i] = ButterKnife.findById(view, R.id.item_photo_more_page_vertical_cover);
            ImageHelper.OnLoadImageListener listener = new ImageHelper.OnLoadImageListener() {
                @Override
                public void onLoadSucceed() {
                    if (!model.hasFadedIn[finalI]) {
                        model.hasFadedIn[finalI] = true;
                        ImageHelper.startSaturationAnimation(a, covers[finalI]);
                    }
                }

                @Override
                public void onLoadFailed() {
                    // do nothing.
                }
            };
            ImageHelper.loadCollectionCover(
                    a,
                    covers[i],
                    photo.related_collections.results.get(0),
                    model.hasFadedIn[i] ? null : listener);

            titles[i] = ButterKnife.findById(view, R.id.item_photo_more_page_vertical_title);
            titles[i].setText(photo.related_collections.results.get(i).title.toUpperCase());

            viewList.add(view);
        }

        viewPager.setAdapter(new MyPagerAdapter(viewList, titleList));
        viewPager.setCurrentItem(model.position);
        viewPager.setTranslationY(
                (float) (a.getResources()
                        .getDimensionPixelSize(R.dimen.item_photo_more_vertical_height) * (-0.5)));
        viewPager.clearOnPageChangeListeners();
        viewPager.addOnPageChangeListener(this);

        indicator.setViewPager(viewPager);
    }

    @Override
    protected void onRecycled() {
        for (ImageView i : covers) {
            ImageHelper.releaseImageView(i);
        }
    }

    public MoreHolderModel saveModel() {
        return model;
    }

    public ViewPager getViewPager() {
        return viewPager;
    }

    // interface.

    // on page change listener.

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        // do nothing.
    }

    @Override
    public void onPageSelected(int position) {
        model.position = position;
    }

    @Override
    public void onPageScrollStateChanged(int state) {
        // do nothing.
    }
}