Question

因此，我正在尝试为用户制作一个应用程序来刷信用卡，它将蓝牙连接到设备来处理它。我正在使用PayPal SDK，但我似乎无法弄清楚如何获取访问令牌用于我的请求。这是我目前的代码：

    public String performPostCall(String requestURL, HashMap<String, String> postDataParams) {

    URL url;
    String response = "";
    try {
        url = new URL(requestURL);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(15000);
        conn.setConnectTimeout(15000);
        conn.setRequestMethod("POST");
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setRequestProperty("Accept", "application/json");


        OutputStream os = conn.getOutputStream();
        BufferedWriter writer = new BufferedWriter(
                new OutputStreamWriter(os, "UTF-8"));
        writer.write(getPostDataString(postDataParams));

        writer.flush();
        writer.close();
        os.close();
        int responseCode=conn.getResponseCode();

        if (responseCode == HttpsURLConnection.HTTP_OK) {
            String line;
            BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream()));
            while ((line=br.readLine()) != null) {
                response+=line;
            }
        }
        else {
            response="";

        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return response;
}

private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException {
    StringBuilder result = new StringBuilder();
    boolean first = true;
    for(Map.Entry<String, String> entry : params.entrySet()){
        if (first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
    }

    return result.toString();
}

public String getPaypalToken() {
    HashMap<String, String> params = new HashMap<String, String>();
    String CLIENT_ID = "no";
    String SECRET = "no";
    params.put("username", Base64.encodeToString((CLIENT_ID + ":" + SECRET).getBytes(), Base64.DEFAULT));
    params.put("grant_type", "client_credentials");
    System.out.println("Params: " + params);
    String output = performPostCall("https://api.sandbox.paypal.com/v1/oauth2/token", params);
    System.out.println("Output: " + output);
    return output;
}

我知道将client_id和secret置于Android设备本身是非常不安全的，但此应用程序唯一的用途就是我的设备。 PayPal什么也没回来，我也不知道为什么。如果有人能给我一些指针，甚至可能是一些非常好的代码。：）

在Lollipop中获取PayPal访问令牌

0 个答案: