android custom view FourSquareImageLayout

FourSqureImageLayout.java

package com.day1song.app.View;

import android.content.Context;
import android.graphics.Bitmap;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;

import com.day1song.app.DSPlayerTracks;
import com.day1song.app.R;
import com.day1song.app.View.Listeners.SimpleImageLoadingListener;
import com.day1song.app.tools.DSUtilities;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.ArrayList;

/**
 * Created by moltak on 2014. 8. 13..
 * four square image layout.
 * 좋아요, 즐겨찾기에서 화면에서 사용됨.
 */
public class FourSqureImageLayout extends RelativeLayout {

    private ImageView fourSquareImageView[];
    private ImageView bigSuqareImageView;
    private ArrayList<String> randomImage = new ArrayList<>();

    public FourSqureImageLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FourSqureImageLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();

        fourSquareImageView = new ImageView[4];
        fourSquareImageView[0] = (ImageView)findViewById(R.id.imageview_squre_small1);
        fourSquareImageView[1] = (ImageView)findViewById(R.id.imageview_squre_small2);
        fourSquareImageView[2] = (ImageView)findViewById(R.id.imageview_squre_small3);
        fourSquareImageView[3] = (ImageView)findViewById(R.id.imageview_squre_small4);
        bigSuqareImageView = (ImageView)findViewById(R.id.imageview_squre_big);
    }

    /**
     * 이미지가 1개일땐 big image view를 사용해서 이미지를 크게 띄움
     * 이미지가 2개 이상일땐 4등분 된 small image view에 이미지를 띄움.
     *
     * @param dsPlayerTracks
     * getTracks().get(0).getImage_url()를 이용해서 이미지 url을 가져오기 위함
     */
    public void setSquareImage(DSPlayerTracks tracks, final OnRandomImageListener onRandomImageListener) {
        if (tracks == null
                || tracks.getTracks() == null
                || tracks.getTracks().size() == 0) return;

        final String []array = DSUtilities.removeDuplication(tracks.getTracksImgUrlToArray());
        if (array.length == 1) {
            randomImage.add(array[0]);
            setBigSuqareImageView(array[0]);
        } else {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    randomImage = DSUtilities.getFourRandomImagesFromTrackList(array);
                    onRandomImageListener.complete(randomImage);
                    ImageSetHandler.sendEmptyMessage(0);
                }
            }).start();
        }
    }

    private Handler ImageSetHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (randomImage != null) {
                setFourSquareImageView(randomImage);
            }
        }
    };

    /**
     * 이미지 리스트를 받아서 square이미지를 구성함
     * @param randomImage 랜덤 이미지 리스트
     */
    public void setRandomSquareImage(ArrayList<String> randomImage) {
        if(randomImage.size() == 1) {
            setBigSuqareImageView(randomImage.get(0));
        }
        else {
            setFourSquareImageView(randomImage);
        }
    }

    /**
     * 이미지가 1개일때
     * @param img_url
     */
    private void setBigSuqareImageView(String img_url) {
        DisplayImageOptions imageOption = DSUtilities.getManyUsingImageOptions(R.drawable.bg_cover_loading);
        ImageLoader.getInstance().displayImage(
                img_url,
                bigSuqareImageView,
                imageOption
        );
    }

    /**
     * 이미지가 1개 이상일때
     *
     * @param randomImage
     * DSUtilities.getFourRandomImagesFromTrackList 에서 나온 random 이미지 리스트
     */
    private void setFourSquareImageView(ArrayList<String> randomImage) {
        DisplayImageOptions imageOption = DSUtilities.getManyUsingImageOptions(R.drawable.bg_cover_loading_small);
        for(int i = 0; i < 4 && i < randomImage.size(); i ++) {
            String image_url = randomImage.get(i);
            if(image_url == null) break;

            ImageLoader.getInstance().displayImage(
                    image_url,
                    fourSquareImageView[i],
                    imageOption,
                    new FourSqureImageLoadingListener(i)
            );
        }
    }

    /**
     * 만약 이미지가 1개보다 많을 때, small image view중 1번 로딩이 끝나면 앞에서 가리고 있던 big image view를 사라지게한다.
     */
    private class FourSqureImageLoadingListener extends SimpleImageLoadingListener {
        private final int index;

        private FourSqureImageLoadingListener(int index) {
            this.index = index;
        }

        @Override
        public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
            if(bigSuqareImageView.getVisibility() == View.VISIBLE) {
                bigSuqareImageView.setVisibility(View.GONE);
            }
        }
    }

    /**
     * 랜덤 이미지 리스트 생성이 끝났을 때, 콜백함수.
     */
    public static interface OnRandomImageListener {
        public void complete(ArrayList<String> arrayList);
    }
}