如何在我的 android 工作室项目中解析 object “rates”并从此 API（附图片）获取字符串“EUR”？

Question

This is the openexchangerate from where I want to parse the EUR Rate

@Override
protected Void doInBackground(Void... voids) {
    try {
        String uRl = "https://openexchangerates.org/api/latest.json?app_id=9d60a61dd1914783b037cc5835ee9829&symbols=EUR";
        JSONObject reader = new JSONObject(uRl);
        JSONObject sys = reader.getJSONObject("rates");
        EUR = sys.getString("EUR");
    } catch (JSONException e) {
        e.printStackTrace();
    }
    return null;
}

@Override
protected void onPostExecute(Void aVoid) {
    progressDialog.dismiss();
    textView.setText(EUR);
}

This is my code to parse the EUR Rate. I used a simple textview in xml to display the rate. But nothing is getting displayed in the emulator. Could someone please help me where I am making mistake?

Screenshot of my emulator

Answer 1

The point is you're trying to parse the API URL to JSON object, instead of the API response. You should call the API first, then parse the API response to JSON object. A similar problem has been solved here: Use JSON API in Java

Hope this is helpful.