Question

我尝试加载图片从网址和显示imageview.i写代码女巫可以下载图像并显示它。但现在我想下载Facebook用户图像并显示它。我知道如何检查Facebook用户图像“喜欢这个 http://graph.facebook.com/user id / picture？width = 80＆amp; height = 80 当我运行programm时，我有RuntimeException 这是我的来源

private class GetXMLTask extends AsyncTask<String, Void, Bitmap> {
    @Override
    protected Bitmap doInBackground(String... urls) {
        Bitmap map = null;
        for (String url : urls) {
            map = downloadImage(url);
        }
        return map;
    }

    // Sets the Bitmap returned by doInBackground
    @Override
    protected void onPostExecute(Bitmap result) {
        user_img.setImageBitmap(result);
    }

    // Creates Bitmap from InputStream and returns it
    private Bitmap downloadImage(String url) {
        Bitmap bitmap = null;
        InputStream stream = null;
        BitmapFactory.Options bmOptions = new BitmapFactory.Options();
        bmOptions.inSampleSize = 1;

        try {
            stream = getHttpConnection(url);
            bitmap = BitmapFactory.decodeStream(stream, null, bmOptions);
            stream.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return bitmap;
    }

    // Makes HttpURLConnection and returns InputStream
    private InputStream getHttpConnection(String urlString)
            throws IOException {
        InputStream stream = null;
        URL url = new URL(urlString);
        URLConnection connection = url.openConnection();

        try {
            HttpURLConnection httpConnection = (HttpURLConnection) connection;
            httpConnection.setRequestMethod("GET");
            httpConnection.connect();

            if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                stream = httpConnection.getInputStream();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return stream;
    }
}



new GetXMLTask().execute((new String[] { URL }));

如果我的网址是例如http://mywebsite./pic.jpg，那么程序工作正常但我想要显示facebook用户图像

Answer 1

你应该使用毕加索。在项目中添加依赖项。而且只需要一行代码即可完成任务。 Picasso.with（上下文）.load（＆＃34; http://somepath/someimage.png＆＃34）。到（ImageView的）; 无需编写线程和优化位图。

您可以参考：http://square.github.io/picasso/

Android从url加载图片并显示imageview

1 个答案: