android - 无法从网址下载图片

Question

你好请帮忙

Bitmap 在设备上运行时为空，但在 Genymotion(模拟器)上运行时运行良好

我正在尝试从 URL 下载图像当我在 Genymotion(模拟器)中运行它时，它运行良好并显示图像，但是当我在设备上运行它时，位图为空。

下面是代码

public void DisplayImage(String url, ImageView imageView)
{
    imageViews.put(imageView, url);
    Bitmap bitmap = memoryCache.get(url);
    if (bitmap != null)
        imageView.setImageBitmap(bitmap);
    else {
        queuePhoto(url, imageView);
        imageView.setImageResource(stub_id);
    }
}

这是网址

url=http://www.hugosys.in/www.nett-torg.no/wp-content/uploads/2014/04/Lighthouse3-300x225.jpg

请帮帮我。

Answer 1

您应该使用 jsoup.jar 文件从服务器下载图像。

例如

    String baseUrl = "URL Here";
    try 
    {
        Document doc = Jsoup.connect(baseUrl).get();
        Elements content = doc.select("a");
        Element last = content.last();
        lastEle=last.text();
        String temp="";
        int totalSize;
        //
        while (!a)
        {
            temp = content.get(i).text();
            a=lastEle.equals(temp);
            File f1 = new File(path);

            File f = new File(f1, temp);
            //Log.d("Image path", f+"");    
            tmpUrl = baseUrl + temp;
        //  Log.d("Full URL", tmpUrl);
            if(!f.exists())
            {
                url = new URL(tmpUrl);
                HttpURLConnection urlConnection=(HttpURLConnection)url.openConnection();

                urlConnection.setRequestMethod("GET");
                urlConnection.setDoOutput(true);
                urlConnection.connect();

                FileOutputStream fileOutput=new FileOutputStream(f);

                InputStream inputStream = urlConnection.getInputStream();
                totalSize = urlConnection.getContentLength();

                int downloadedSize = 0;
                byte[] buffer = new byte[1024];
                int bufferLength = 0;
                str= "";
                while ( (bufferLength = inputStream.read(buffer)) > 0 ) 
                {
                    fileOutput.write(buffer, 0, bufferLength);
                    downloadedSize += bufferLength;
                }
            }
            else
            {
                Log.d("Image Available", "Available");
            }
            i++;
        }    
    } 
    catch (IOException e) 
    {
        Log.e(TAG, "Failed to load HTML code", e);
    }