Question

这是我写的代码：

public class ResultsFragment extends Fragment implements RequestHandler {
    FragmentNameFactory nameFactory = new FragmentNameFactory();
    String status = "1" ;
    public ResultsFragment(){
        //Fragment needs a constructor, can be empty
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        ((MainActivity) getActivity()).setFragmentName(nameFactory.getNameNL(5));
        final View view = inflater.inflate(R.layout.fresults, container, false);
        RequestQueue rq = Volley.newRequestQueue(getActivity().getApplicationContext());
        String url= "http://grwn.ddns.net:1337/results";
        final String body = "{\"id\":1}";
        RequestHandler requestHandler = this;
        VolleyStringRequest volleyStringRequest = new VolleyStringRequest(url, body, requestHandler);
        rq.add(volleyStringRequest.createStringRequest());
        Log.e("CreateView status", status);
        return view;
    }
    @Override
    public void onViewCreated(View view, Bundle savedInstance){
        super.onViewCreated(view, savedInstance);
    }
    @Override
    public void onActivityCreated(Bundle savedInstance){
        super.onActivityCreated(savedInstance);
    }

    @Override
    public void onResponse(String response) {
        try{
            JSONObject jsonObject = new JSONObject(response);
            JSONArray values= jsonObject.getJSONArray("response");
            Log.e("RESPONSE", values.toString());
            Log.e("STATUS", jsonObject.get("status").toString());
            setStatus(jsonObject.get("status").toString());
            Log.e("status variable", status);
        }
        catch (JSONException e){
            e.printStackTrace();
        }
    }
    public void setStatus(String value){
        status += value;
        Log.e("setStatus", status);
    }
}

界面：

public interface RequestHandler {
    void onResponse(String response);
}

VolleyClass：

public class VolleyStringRequest {
    String url;
    String body;
    String value;
    RequestHandler requestHandler;
    public VolleyStringRequest(String url, String body, RequestHandler requestHandler){
        this.url = url;
        this.body = body;
        this.requestHandler = requestHandler;
        value= "";
    }
    public StringRequest createStringRequest(){
        return new StringRequest(Request.Method.POST, url,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        // Do something with the response
                        Log.e("Response", response);
                        try{
                            JSONObject o = new JSONObject(response);
                            JSONArray values=o.getJSONArray("response");
                            value += o;
                            if(requestHandler != null){
                                requestHandler.onResponse(value);
                            }
                        }  catch (JSONException ex){}

                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        // Handle error
                    }
                }) {
            @Override
            public byte[] getBody() throws AuthFailureError {
                return body.getBytes();
            };
            @Override
            public String getBodyContentType() {
                return "application/json";
            }
        };

    }
}

我想将响应中的对象分配给ResultsFragment中的全局变量，并在onCreateView内使用它，但不知怎的，我无法将值赋给onCreateView内的变量。稍后在运行期间，该值将分配给状态变量。谁能帮我解决这个问题？

Answer 1

一般来说，在onCreateView中，您会在布局中显示进度微调器或其他内容，然后在onResponse处理程序中更新布局并设置变量等，基于您从请求响应中获得的数据。

因此，不要求onCreateView中的数据，而是推迟到响应回来并处理它。

从Android Volley为变量赋值

1 个答案: