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[英]Android Volley JSONObjectRequest in Fragment outputs nothing
[英]android-Volley JSONObjectRequest return 401 error
我正在尝试将带有参数的POST请求发送到服务器。 但是post参数始终为null。
我从stackoverflow
尝试了几种解决方案,但是没有用。
我收到11.urlname的意外响应代码401
Map<String, String> jsonParams = new HashMap<String, String>();
jsonParams.put("username", "test@mail.com");
jsonParams.put("usertype", "userType");
jsonParams.put("apikey", "key");
JsonObjectRequest myRequest = new JsonObjectRequest(Request.Method.POST,apiURL, new JSONObject(jsonParams),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
String status=response.getString("status");
if (status.equals("success"))
{
txtResponse.setText("Valid user");
}
else {
txtResponse.setText("InValid USer");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=UTF-8");
return headers;
}
};
AppController.getInstance().addToRequestQueue(myRequest, "tag");
我的应用控制器代码是
public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();
private RequestQueue mRequestQueue;
private static AppController mInstance;
@Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static synchronized AppController getInstance() {
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
public <T> void addToRequestQueue(Request<T> req, String tag) {
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
getRequestQueue().add(req);
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag(TAG);
getRequestQueue().add(req);
}
public void cancelPendingRequests(Object tag) {
if (mRequestQueue != null) {
mRequestQueue.cancelAll(tag);
}
}
}
如果您的问题尚未解决,则可以参考以下代码来构建请求正文(参数)
private String buildRequestBody(Object content) {
String output = null;
if ((content instanceof String) ||
(content instanceof JSONObject) ||
(content instanceof JSONArray)) {
output = content.toString();
} else if (content instanceof Map) {
Uri.Builder builder = new Uri.Builder();
HashMap hashMap = (HashMap) content;
if (isValid(hashMap)) {
Iterator entries = hashMap.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry entry = (Map.Entry) entries.next();
builder.appendQueryParameter(entry.getKey().toString(), entry.getValue().toString());
entries.remove(); // avoids a ConcurrentModificationException
}
output = builder.build().getEncodedQuery();
}
}
return output;
}
然后...
Map<String, String> stringMap = new HashMap<>();
stringMap.put("username", "yourusername");
stringMap.put("password", "yourpassword");
...
String requestBody = buildRequestBody(stringMap);
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