I sent request with postman its working, but volley doesn't work. I always get error! I searched stackoverflow volley returns error when response is empty but i added CustomJsonObjectRequest
still the issue remains.
Error message
Volley org.json.JSONException: End of input at character 0 of
CustomJsonObjectRequest
public class CustomJsonObjectRequest extends JsonObjectRequest {
public CustomJsonObjectRequest(int method, String url, JSONObject jsonRequest, Response.Listener<JSONObject> listener, Response.ErrorListener errorListener) {
super(method, url, jsonRequest, listener, errorListener);
}
@Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
try {
if (response.data.length == 0) {
byte[] responseData = "{}".getBytes("UTF8");
response = new NetworkResponse(response.statusCode, responseData, response.headers, response.notModified);
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return super.parseNetworkResponse(response);
}
}
Volley request
EcoElement ecoElement = ecoElementArrayList.get(position);
Map<String, String> params = new HashMap<String, String>();
params.put("Id", ecoElement.getId().toString());
params.put("Checked", ecoElement.getChecked().toString());
JSONObject ObjParams = new JSONObject(params);
try {
CustomJsonObjectRequest getRequest = new CustomJsonObjectRequest(Request.Method.PUT, "https://ourwebsite.sslbeta.de/api/gardenapi/updateecoelements", ObjParams,
response -> {
Toast.makeText(getContext(), ""+response, Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
},
error -> {
Toast.makeText(getContext(), ""+error.toString(), Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
}
);
RequestQueueSingleton.getInstance(getContext()).addToRequestQueue(getRequest);
} catch (Exception e) {
Toast.makeText(getContext(), e.toString(), Toast.LENGTH_LONG).show();
}
Here is the solution, just create this method and pass your value.
private void CustomJsonObjectRequest() {
String tag_string_req = "req__details";
StringRequest strReq = new StringRequest(Request.Method.POST, <API URL>, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
getPerspective().showErrorLogs(TAG, "Response Invest : " + response);
try {
// Parse your response here
} catch (Exception e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("Id", <ID VALUE HERE>);
params.put("Checked", <TRUE or FALSE>);
return params;
}
};
strReq.setRetryPolicy(new RetryPolicy() {
@Override
public void retry(VolleyError arg0) throws VolleyError {
}
@Override
public int getCurrentTimeout() {
return 0;
}
@Override
public int getCurrentRetryCount() {
return 0;
}
});
strReq.setShouldCache(false);
addToRequestQueue(strReq, tag_string_req);
}
Both ID and Checked must have String type.And create below methods in MainActivity:
private RequestQueue mRequestQueue;
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);
}
Finally i was able to fix the issues after hours of searching. There were two reasons to this, first is that api was returning null/empty so CustomJsonObjectRequest
fixed that, and then another issue is that i forgot to add authentication headers. that was a silly mistake i know!
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json");
headers.put("Authorization", "Bearer "+access_token);
return headers;
}
};
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