对MongoLab的Android HTTP GET请求

我正在的沙盒db中开发一个测试应用程序MongoLab。执行REST查询时，我会得到正确的文档，但是在我的Android应用程序中执行该文档会抛出异常：

查询：（https://api.mongolab.com/api/1/databases/my-db/collections/my-col?q={id:"123"}&apiKey=***当然，定义了db，col和api键）。将此URI放在浏览器中会找回我要查找的文档。

安卓：

class RequestTask extends AsyncTask<String, String, String> {

    @Override
    protected String doInBackground(String... uri) {
        Log.i("URI", uri[0]);
        HttpClient httpclient = new DefaultHttpClient();
        HttpResponse response;
        String responseString = null;
        try {
            response = httpclient.execute(new HttpGet(uri[0]));
            StatusLine statusLine = response.getStatusLine();
            if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                response.getEntity().writeTo(out);
                responseString = out.toString();
                out.close();
            } else {
                // Closes the connection.
                response.getEntity().getContent().close();
                throw new IOException(statusLine.getReasonPhrase());
            }
        } catch (ClientProtocolException e) {
            Log.e(LOG_TAG, e.getMessage());
        } catch (IOException e) {
            Log.e(LOG_TAG, e.getMessage());
        }
        return responseString;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        Log.i(LOG_TAG, result);
    }
}

例外：

java.lang.RuntimeException: An error occured while executing doInBackground()
...
Caused by: java.lang.IllegalArgumentException: Illegal character in query at index 71: https://api.mongolab.com/api/1/databases/my-db/collections/my-col?q={"id":"123"}&apiKey=***

在索引71中的字符将是第一=后my-col?q，且有于该行的引用：response = httpclient.execute(new HttpGet(uri[0]));

为什么在浏览器上而不是在我的设备上能正常工作？我已经成功地拉出了所有文档而没有查询...