[使用JSON从URL添加图像

Question

*我是JSON新手。感谢您的帮助。如何通过Json在图像中添加解析。有人可以告诉我我在这里想念什么吗？我希望每个新闻链接的图像都显示在我的imageview上（xml中的占位符），这里是链接和api。 https://newsapi.org/v2/top-headlines?country=us&apiKey=6a6f7c77766442acb20c86157a152131“

非常感谢您的帮助*

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这是我在Query.Java中的代码

try {
    JSONObject baseJsonResponse = new JSONObject(bookJson);
    JSONArray newsArray = baseJsonResponse.getJSONArray("articles");

    for (int i = 0; i < newsArray.length(); i++) {

        JSONObject currentNews = newsArray.getJSONObject(i);
        /*JSONObject properties = currentNews.getJSONObject("articles");*/
        JSONObject newsSource = currentNews.getJSONObject("source");

        String title = currentNews.getString("title");
        String description = currentNews.getString("description");
        String url = currentNews.getString("url");
        /*String name = properties.getString("name");*/
        String name = newsSource.getString("name");
        String time = currentNews.getString("publishedAt");

        String image = currentNews.getString("urlToImage");



        News news = new News (title, description, url, name, time, image);


here is the code in custom class

package com.example.trynews;

public class News {

    private String mTitle;
    private String mDescription;
    private String mUrl;
    private String mSource;
    private String mTime;
    private String mUrlImage;




    public News (String title, String description, String url, String name, String time, String images) {
        mTitle = title;
        mDescription = description;
        mUrl = url;
        mSource = name;
        mTime = time;
        mUrlImage = images;
 }

    public String getTitle() {
        return mTitle;
    }

    public String getDescription() {
        return mDescription;
    }

    public String getURL() {
        return mUrl;
    }


    public String getName() {
        return mSource;
    }
    public String getTIME() {
        return mTime;
    }

    public String getImageUrl() {
        return mUrlImage;
    }


}


and here is the code in adapter (listview)

public class NewsAdapter extends ArrayAdapter<News> {
    public NewsAdapter(Context context, List<News> newss) {
        super(context, 0, newss);
    }

    @Override
    public View getView(int position,  View convertView, ViewGroup parent) {
        View listItemView = convertView;
        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(
                    R.layout.news_list_item, parent, false);
        }

        News currentNews = getItem(position);


        TextView titleView = (TextView) listItemView.findViewById(R.id.title);
        titleView.setText(currentNews.getTitle());


        TextView descripView = (TextView) listItemView.findViewById(R.id.description);
        descripView.setText(currentNews.getDescription());




        TextView sourceView = (TextView) listItemView.findViewById(R.id.newsSource);
        sourceView.setText(currentNews.getName());


        TextView timeView = (TextView) listItemView.findViewById(R.id.date);
        timeView.setText(currentNews.getTIME());



        ImageView imageView = (ImageView) listItemView.findViewById(R.id.imageView);
        imageView.setImagerResource(currentNews.getImageUrl());

        I am getting an error here it says I cant add a String inside setImageResource. 



        return listItemView;
    }

Answer 1

   ImageView imageView = (ImageView) listItemView.findViewById(R.id.imageView);
   URL url = new URL(currentNews.getImageUrl());
   Bitmap bitmap = 
   BitmapFactory.decodeStream(url.openConnection().getInputStream());
   imageView.setImageBitmap(bitmap);

尝试上面的代码

Answer 2

如果要显示来自url的图像，简单的方法是使用图像库。

例如Glide

添加build.gradle

repositories {
  mavenCentral()
  google()
}

dependencies {
  implementation 'com.github.bumptech.glide:glide:4.9.0'
  annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'
}

以及在适配器中，

imageView.setImagerResource(currentNews.getImageUrl());

更改为

Glide.with(getContext).load(currentNews.getImageUrl()).into(imageView);