Question

我有一个textView。在我的代码中，我在其中添加了一些文本行。我还想在这些行之间显示来自外部URL（而不是我的资源文件夹）的一些图像。每件事都是动态的，即生成的文本和图像URL将在流上生成。所以我必须通过我的代码获取图像并添加它。

想知道是否有办法在文本视图中插入来自外部URL的图像？也欢迎任何更好的方法。

Answer 1

你必须和asynctask一起使用它，在doInbackground()中打开连接在onPostExecute()

中将图片设置为textview

  try {
        /* Open a new URL and get the InputStream to load data from it. */
        URL aURL = new URL("ur Image URL");
        URLConnection conn = aURL.openConnection();
        conn.connect();
        InputStream is = conn.getInputStream();
        /* Buffered is always good for a performance plus. */
        BufferedInputStream bis = new BufferedInputStream(is);
        /* Decode url-data to a bitmap. */
        Bitmap bm = BitmapFactory.decodeStream(bis);
        bis.close();
        is.close();

        Drawable d =new BitmapDrawable(bm);
       d.setId("1");
 textview.setCompoundDrawablesWithIntrinsicBounds(0,0,1,0);// wherever u want the image relative to textview
        } catch (IOException e) {
        Log.e("DEBUGTAG", "Remote Image Exception", e);
        }

希望有所帮助

Answer 2

您可能希望使用asynctask来抓取图像。这将在您的其他任务的后台运行。您的代码可能如下所示：

    public class ImageDownloader extends AsyncTask<String, Integer, Bitmap>{

    private String url;
    private final WeakReference<ImageView> imageViewReference;

    //a reference to your imageview that you are going to load the image to
    public ImageDownloader(ImageView imageView) {
        imageViewReference = new WeakReference<ImageView>(imageView);
    }

    @Override
    protected Bitmap doInBackground(String... arg0) {
        if(isCancelled())
            return null;
        Bitmap retVal;

        url = arg0[0];//this is the url for the desired image
        ...download your image here using httpclient or another networking protocol..
        return retVal;
    }
    @Override
    protected void onPostExecute(Bitmap result) {
        if (isCancelled()) {
            result = null;
            return;
        }
        ImageView imageView = imageViewReference.get();
        imageView.setImageBitmap(result);
    }
    @Override
    protected void onPreExecute() {
        ...do any preloading you might need, loading animation, etc...
    }

如何在textView中显示URL中的图像

2 个答案: