news_client/app/src/main/java/com/example/myapplication/ImageLoader.java

package com.example.myapplication;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

import javax.net.ssl.HttpsURLConnection;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

public class ImageLoader {

    private ImageView mImageView;
    private String murl;
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(mImageView.getTag().equals(murl)) {
                mImageView.setImageBitmap((Bitmap) msg.obj);
            }
        }
    };

    public void showImagerByThread(ImageView imageView, final String url){
        mImageView = imageView;
        murl = url;
        new Thread(){
            @Override
            public void run() {
                super.run();
                Bitmap bitmap = getBitmapFromURL(url);
                Message message = Message.obtain();
                message.obj = bitmap;
                handler.sendMessage(message);
            }
        }.start();
    }

    public Bitmap getBitmapFromURL(String urlString){
        Bitmap bitmap;
        InputStream is = null;
        try {
            URL url = new URL(urlString);
            HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
            is = new BufferedInputStream(connection.getInputStream());
            bitmap = BitmapFactory.decodeStream(is);
            connection.disconnect();
            return bitmap;
        } catch (java.io.IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }
}