从Volley / AsyncTask返回值到调用方法

时间:2019-02-18 11:11:23

标签: android android-asynctask android-volley java-threads android-thread

所以说我有一个用于执行Api调用的类,该类扩展了volley Request类:

public class ApiCall extends Request<JSONObject> {

private Listener<JSONObject> listener;
private Map<String, String> params;

public ApiCall(int method, String url, Map<String, String> params,
               Listener<JSONObject> reponseListener, ErrorListener errorListener) {
    super(method, url, errorListener);
    this.listener = reponseListener;
    this.params = params;
}

protected Map<String, String> getParams()
        throws com.android.volley.AuthFailureError {
    return params;
}

@Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
}

@Override
protected void deliverResponse(JSONObject response) {
    listener.onResponse(response);
}
}

然后我在内部类中使用此实现不同api的实现

public class Website_A_Api {

    public getJson_foo(){
        addToRequestQueue(new ApiCall(Request.Method.GET, fullUri, header, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            //Do stuff here
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
           //Handle Errors
        }
    }));
    }}

只要我在onResponse中做我需要做的所有事情,它就可以正常工作。问题是我需要以某种方式将JSONObject返回到调用getJson_foo()的位置。我尝试将FutureRequests用于同步调用,但是不会在ui线程上运行。我将如何执行此操作/设置另一个线程以运行同步调用?

1 个答案:

答案 0 :(得分:0)

尝试

    JSONArray array = new JSONArray();
        JSONObject object = new JSONObject();
        object.put("Key","value");
        array.put(object);
     addToRequestQueue(new ApiCall(Request.Method.GET, fullUri, array, new Response.Listener<JSONObject>(){
 @Override
        public void onResponse(JSONObject response) {
            //Do stuff here
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
           //Handle Errors
        }
    }));
    }}