org.huxizhijian.hhcomicviewer.adapter.GalleryViewPagerAdapter.java Source code

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Here is the source code for org.huxizhijian.hhcomicviewer.adapter.GalleryViewPagerAdapter.java

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/*
 * Copyright 2017 huxizhijian
 *
 * 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 org.huxizhijian.hhcomicviewer.adapter;

import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import org.huxizhijian.hhcomicviewer.model.ComicChapter;
import org.huxizhijian.hhcomicviewer.ui.entry.GalleryActivity;
import org.huxizhijian.hhcomicviewer.utils.CommonUtils;
import org.huxizhijian.hhcomicviewer.utils.Constants;
import org.huxizhijian.hhcomicviewer.view.ZoomImageView;
import org.huxizhijian.hhcomicviewer.view.listener.OnCenterTapListener;
import org.huxizhijian.hhcomicviewer.view.listener.OnLeftOrRightTapListener;
import org.huxizhijian.sdk.imageloader.ImageLoaderOptions;
import org.huxizhijian.sdk.imageloader.listener.ImageLoaderManager;

import java.io.File;
import java.util.LinkedList;

/**
 * GalleryViewPagerAdapter
 * Created by wei on 2017/1/21.
 */

public class GalleryViewPagerAdapter extends PagerAdapter {

    private GalleryActivity mContext;
    private ComicChapter mComicChapter;
    private LinkedList<ZoomImageView> mRecyclerImageViews;
    private boolean mLoadOnLineFullSizeImage;

    private OnCenterTapListener onCenterTapListener;
    private OnLeftOrRightTapListener onLeftOrRightTapListener;

    //
    private ImageLoaderManager mImageLoader = ImageLoaderOptions.getImageLoaderManager();

    public GalleryViewPagerAdapter(GalleryActivity context, boolean loadOnLineFullSizeImage) {
        mContext = context;
        mLoadOnLineFullSizeImage = loadOnLineFullSizeImage;
    }

    public void setComicChapter(ComicChapter comicChapter) {
        mComicChapter = comicChapter;
    }

    public void setOnLeftOrRightTapListener(OnLeftOrRightTapListener onLeftOrRightTapListener) {
        this.onLeftOrRightTapListener = onLeftOrRightTapListener;
    }

    public void setOnCenterTapListener(OnCenterTapListener onCenterTapListener) {
        this.onCenterTapListener = onCenterTapListener;
    }

    @Override
    public Object instantiateItem(ViewGroup container, final int position) {
        ZoomImageView imageView = null;
        if (mRecyclerImageViews == null) {
            mRecyclerImageViews = new LinkedList<>();
        }
        if (mRecyclerImageViews.size() > 0) {
            //?ImageView
            imageView = mRecyclerImageViews.removeFirst();
        } else {
            //ImageView
            imageView = getImageView();
        }
        //??imageView??
        setImageViewRecycler(imageView, position);
        container.addView(imageView);
        return imageView;
    }

    private void setImageViewRecycler(final ZoomImageView imageView, int position) {
        if (mComicChapter != null && mComicChapter.getDownloadStatus() == Constants.DOWNLOAD_FINISHED) {
            //
            File file = new File(mComicChapter.getSavePath(), CommonUtils.getPageName(position));
            if (file.exists()) {
                mImageLoader.displayGallery(mContext, file, imageView);
            } else {
                Toast.makeText(mContext, "?~", Toast.LENGTH_SHORT).show();
            }
        } else {
            //
            if (mLoadOnLineFullSizeImage) {
                //
                if (mComicChapter != null) {
                    mImageLoader.displayGalleryFull(mContext, mComicChapter.getPicList().get(position), imageView);
                }
            } else {
                //??
                if (mComicChapter != null) {
                    mImageLoader.displayGalleryFit(mContext, mComicChapter.getPicList().get(position), imageView);
                }
            }
        }
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        ZoomImageView imageView = (ZoomImageView) object;
        //
        //            imageView.setImageInCenter();
        //
        imageView.setImageDrawable(null);
        imageView.setImageBitmap(null);
        releaseImageViewResource(imageView);
        //?
        container.removeView(imageView);
        //?
        mRecyclerImageViews.addLast(imageView);
    }

    private void releaseImageViewResource(ZoomImageView imageView) {
        if (imageView == null)
            return;
        Drawable drawable = imageView.getDrawable();
        if (drawable != null && drawable instanceof BitmapDrawable) {
            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
            Bitmap bitmap = bitmapDrawable.getBitmap();
            if (bitmap != null && !bitmap.isRecycled()) {
                bitmap.recycle();
                bitmap = null;
            }
        }
        System.gc();
    }

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        return arg0 == arg1;
    }

    @Override
    public int getCount() {
        return mComicChapter.getPageCount();
    }

    private ZoomImageView getImageView() {
        ZoomImageView imageView = new ZoomImageView(mContext);
        if (onCenterTapListener != null) {
            imageView.setOnCenterTapListener(onCenterTapListener);
        }
        if (onLeftOrRightTapListener != null) {
            imageView.setOnLeftOrRightTapListener(onLeftOrRightTapListener);
        }
        return imageView;
    }
}