Question

我正在尝试创建一个包含小图像的ImageView列表，并通过单击它们来显示大图。我在AsyncTask中使用解析器从站点下载。

在第一步（“doInBackground”）解析器从小图像中读取URL并将它们放到ArrayList<HashMap<String, String>>。我使用键“imgUrlSmall”

然后从大图像中读取URL并将其放到相同的ArrayList中。使用键“imgUrlBig”

在“onPostExecute”中，它会创建ImageView并设置图像imageViewArray[i].setImageDrawable(grabImageFromUrl(text));

然后设置ClickListener，在点击图片时启动新活动并将大图像的网址放在那里。

现在程序会显示所有图像（大小）。如何使用键“imgUrlSmall”将imageViewArray仅赋值。和putExtra的值是否正确？

可能是一些验证，例如map.containsKey?

对于第二部分，要使putExtra可以将所有带有键“imgUrlBig”的值放到标准ArrayList<String>然后单击图像使用v.getId()？

抱歉我的英文

这里是所有代码：

doInBackground

 protected ArrayList<HashMap<String, String>> doInBackground(String... params) {
           ArrayList<HashMap<String, String>> imgItems = new ArrayList<HashMap<String, String>>();
                /* --First Parser-- */
                 HtmlCleaner htmlCleaner = new HtmlCleaner();
                 URL url = new URL(BLOG_URL);
                 TagNode root = htmlCleaner.clean(url);
                 Object[] statsNode3 = root.evaluateXPath(XPATH_STATS3);

                for (Object tag : statsNode3){
                        TagNode aTag = (TagNode) tag;
                        String href = aTag.getAttributeByName("src").trim();

                        // creating new HashMap
                        HashMap<String, String> map = new HashMap<String, String>();

                        // adding each child node to HashMap key => value
                        map.put("imgUrlSmall", href);

                        // adding HashList to ArrayList
                        imgItems.add(map);
                 }
                /* --Second Parser-- */
                 HtmlCleaner htmlCleaner2 = new HtmlCleaner();
                 URL url2 = new URL(BLOG_URL);
                 TagNode root2 = htmlCleaner2.clean(url2);

                 Object[] statsNode_Full_Image = root2.evaluateXPath(XPATH_STATS4);
                 for (Object tag : statsNode_Full_Image){
                        TagNode aTag = (TagNode) tag;
                        String href = aTag.getAttributeByName("href").trim();

                        // creating new HashMap
                        HashMap<String, String> map = new HashMap<String, String>();

                        // adding each child node to HashMap key => value
                        map.put("imgUrlBig", href);

                        // adding HashList to ArrayList
                        imgItems.add(map);
                        }

        return imgItems;

     }

onPostExecute

protected void onPostExecute( ArrayList<HashMap<String, String>> imgItems) {
String text="";
int i=0;    
 ImageView[] imageViewArray = new ImageView[imgItems.size()];
    for (HashMap<String, String> map : imgItems)
         for (Entry<String, String> mapEntry : map.entrySet())
            {
                text = mapEntry.getValue();
                // create ImageView
                imageViewArray[i] = new ImageView(Test4.this);
                RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(50,50);
                imageViewArray[i].setImageDrawable(grabImageFromUrl(text));
                imageViewArray[i].setOnClickListener( new OnClickListener()
                    {
                        @Override
                        public void onClick(View v) {
                            System.out.println(v.getId());
                            Intent intent = new Intent(v.getContext(), Full_Image_Activity.class);
                            intent.putExtra("imgUrlBig", url); //Here i don`t know how to put the url
                            startActivityForResult(intent, 0);

                        }
                    });

                // Let's get the root layout and add our ImageView
                RelativeLayout layout = (RelativeLayout) findViewById(R.id.moreImages);
                layout.addView(imageViewArray[i], params);
                i++;
                }

}

Answer 1

您应该使用两个网址创建一个类，然后您可以使用ArrayList<HashMap<String, YourImageClass>>类应该是这样的

public class YourImageClass{
public String smallImageUrl;
public String bigImageUrl;
public String someNameOfImageMaybe;
etc.
}

仅使用右键使用HashMap中的值

1 个答案: