您好，我正在以 json 格式向服务器发布数据， 但它在错误响应中返回 Volley 服务器错误`
RequestQueue queue = Volley.newRequestQueue(this);
JSONObject jobj=new JSONObject();
try {
jobj.put("id",”123”);
jobj.put("session","new");
JSONArray array = null;
array = new JSONArray();
for (int i = 0;i<3;i++){
JSONObject jsonObject = new JSONObject();
jsonObject.put("name","test");
jsonObject.put("content","test");
jsonObject.put("time"," 2016-04-07T11:44:22.407Z ");
array.put(jsonObject);
}
Log.e(" array "," arrr"+array.toString());
jobj.put("data",array);
} catch (JSONException e) {
e.printStackTrace();
}
Log.e("jsondata",jobj.toString());
JsonObjectRequest sr= new JsonObjectRequest(post_url, jobj, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
@OveRequestQueue queue = Volley.newRequestQueue(this);
JSONObject jobj=new JSONObject();
try {
jobj.put("id",”123”);
jobj.put("session","new");
JSONArray array = null;
array = new JSONArray();
for (int i = 0;i<3;i++){
JSONObject jsonObject = new JSONObject();
jsonObject.put("name","test");
jsonObject.put("content","test");
jsonObject.put("time"," 2016-04-07T11:44:22.407Z ");
array.put(jsonObject);
}
Log.e(" array "," arrr"+array.toString());
jobj.put("data",array);
} catch (JSONException e) {
e.printStackTrace();
}
Log.e("jsondata",jobj.toString());
JsonObjectRequest sr= new JsonObjectRequest(post_url, jobj, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}rride
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String,String> params = new HashMap<String, String>();
params.put("Content-Type","application/json");
return params;
}
};
queue.add(sr);`
最佳答案
有一个处理请求队列的单例。
public class VolleySingleton {
// Singleton object...
private static VolleySingleton instance;
final private RequestQueue requestQueue;
private static ImageLoader imageLoader;
//Constructor...
private VolleySingleton(Context context) {
requestQueue = Volley.newRequestQueue(context);
imageLoader = new ImageLoader(requestQueue, new ImageLoader.ImageCache() {
private final LruCache<String, Bitmap> cache = new LruCache<>(100000000);
@Override
public Bitmap getBitmap(String url) {
return cache.get(url);
}
@Override
public void putBitmap(String url, Bitmap bitmap) {
cache.put(url, bitmap);
}
});
}
// Singleton method...
public static VolleySingleton getInstance(Context context) {
if (instance == null) {
instance = new VolleySingleton(context);
}
return instance;
}
public RequestQueue getRequestQueue(Context context) {
if (requestQueue != null) {
return requestQueue;
} else {
getInstance(context);
return requestQueue;
}
}
private RequestQueue getRequestQueue() {
return requestQueue;
}
public static ImageLoader getImageLoader(Context context) {
if (imageLoader != null) {
return imageLoader;
} else {
getInstance(context);
return imageLoader;
}
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag("App");
getRequestQueue().add(req);
}
}
然后使用下面的方法你可以发送请求。
public void postVolley(final Context context, String url, JSONObject jsonObject) {
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST, url, jsonObject, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject responseJson) {
Log.e("success", "" + responseJson.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("error", "" + error);
}
}) {
/**
* Setting the content type
*/
@Override
public String getBodyContentType() {
return "application/json;charset=UTF-8";
}
};
VolleySingleton.getInstance(context).addToRequestQueue(jsonObjReq);
}
这对我来说很好。
关于android - 使用 volley 以 json 格式将数据发布到服务器，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36905705/