com.yanzhenjie.album.adapter.BasicPreviewAdapter.java Source code

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Here is the source code for com.yanzhenjie.album.adapter.BasicPreviewAdapter.java

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/*
 * Copyright  Yan Zhenjie. All Rights Reserved
 *
 * 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.yanzhenjie.album.adapter;

import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

import com.yanzhenjie.album.Album;
import com.yanzhenjie.album.util.DisplayUtils;
import com.yanzhenjie.album.widget.photoview.AttacherImageView;
import com.yanzhenjie.album.widget.photoview.PhotoViewAttacher;

import java.util.List;

/**
 * <p>Adapter of preview the big picture.</p>
 * Created by Yan Zhenjie on 2016/10/19.
 */
public abstract class BasicPreviewAdapter<T> extends PagerAdapter {

    private List<T> mPreviewList;

    public BasicPreviewAdapter(List<T> previewList) {
        this.mPreviewList = previewList;
    }

    @Override
    public int getCount() {
        return mPreviewList == null ? 0 : mPreviewList.size();
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    protected abstract String getImagePath(T t);

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        AttacherImageView imageView = new AttacherImageView(container.getContext());
        imageView.setLayoutParams(new ViewGroup.LayoutParams(-1, -1));
        container.addView(imageView);
        final PhotoViewAttacher attacher = new PhotoViewAttacher(imageView);
        imageView.setAttacher(attacher);

        Album.getAlbumConfig().getImageLoader().loadImage(imageView, getImagePath(mPreviewList.get(position)),
                DisplayUtils.screenWidth, DisplayUtils.screenHeight);
        return imageView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView(((View) object));
    }
}