library/src/main/java/com/lqr/imagepicker/adapter/ImagePageAdapter.java

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package com.lqr.imagepicker.adapter;

import android.app.Activity;
import android.support.v4.view.PagerAdapter;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;

import com.lqr.imagepicker.ImagePicker;
import com.lqr.imagepicker.Utils;
import com.lqr.imagepicker.bean.ImageItem;

import java.util.ArrayList;

import uk.co.senab.photoview.PhotoView;
import uk.co.senab.photoview.PhotoViewAttacher;

public class ImagePageAdapter extends PagerAdapter {

    private int screenWidth;
    private int screenHeight;
    private ImagePicker imagePicker;
    private ArrayList<ImageItem> images = new ArrayList<>();
    private Activity mActivity;
    public PhotoViewClickListener listener;

    public ImagePageAdapter(Activity activity, ArrayList<ImageItem> images) {
        this.mActivity = activity;
        this.images = images;

        DisplayMetrics dm = Utils.getScreenPix(activity);
        screenWidth = dm.widthPixels;
        screenHeight = dm.heightPixels;
        imagePicker = ImagePicker.getInstance();
    }

    public void setData(ArrayList<ImageItem> images) {
        this.images = images;
    }

    public void setPhotoViewClickListener(PhotoViewClickListener listener) {
        this.listener = listener;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        PhotoView photoView = new PhotoView(mActivity);
        ImageItem imageItem = images.get(position);
        imagePicker.getImageLoader().displayImage(mActivity, imageItem.path, photoView, screenWidth, screenHeight);
        photoView.setOnPhotoTapListener(new PhotoViewAttacher.OnPhotoTapListener() {
            @Override
            public void onPhotoTap(View view, float x, float y) {
                if (listener != null) listener.OnPhotoTapListener(view, x, y);
            }
        });
        container.addView(photoView);
        return photoView;
    }

    @Override