Adding custom headers to a volleyball request

Question

I have a Volley request code

RequestQueue queue = Volley.newRequestQueue(this);
String url =<My URL>;

// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
            new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        // Display the first 500 characters of the response string.
        mTextView.setText("Response is: "+ response.substring(0,500));
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        mTextView.setText("That didn't work!");
    }
});
// Add the request to the RequestQueue.
queue.add(stringRequest);

How to set up a title called Authorization in this

Answer 1

you can write the extends Request class. (override getHeaders () and so on) exactly the same as

public abstract class AbsRequest<T> extends Request<T>{

    public AbsRequest(int method, String url, Response.ErrorListener listener) {
        this(method, url, null, listener);
    }

    public AbsRequest(int method, String url, Map<String, String> params, Response.ErrorListener listener) {
        this(method, url, params, null, listener);
    }

    public AbsRequest(int method, String url, Map<String, String> params, Map<String, String> head, Response.ErrorListener listener) {
        this(method, url, params, head, null, listener);
    }

    public AbsRequest(int method, String url, Map<String, String> params, Map<String, String> head, String bodyContentType, Response.ErrorListener listener) {
        this(method, url, params, null, head, bodyContentType, listener);
    }

    public AbsRequest(int method, String url, String body, Map<String, String> head, String bodyContentType, Response.ErrorListener listener) {
        this(method, url, null, body, head, bodyContentType, listener);
    }

    private AbsRequest(int method, String url, Map<String, String> params, String body, Map<String, String> head, String bodyContentType,  Response.ErrorListener listener) {
        super(method, url, listener);
    }
}

for more information you can see https://github.com/Caij/CodeHub/blob/master/lib/src/main/java/com/caij/lib/volley/request/AbsRequest.java how to use you can see https: //github.com/Caij/CodeHub/tree/master/app/src/main/java/com/caij/codehub/presenter/imp

Answer 2

Replace getHeaders in the request, for example:

 StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    // Display the first 500 characters of the response string.
                    mTextView.setText("Response is: "+ response.substring(0,500));
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            mTextView.setText("That didn't work!");
        }
    }){
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String,String> params =  super.getHeaders();
            if(params==null)params = new HashMap<>();
            params.put("Authorization","Your authorization");
            //..add other headers
            return params;
        }
    };

Answer 3

A call to super.getHeaders () throws a UnSupportedOperationException. remove super.getHeaders () to get rid of this.