Android-Volley:为JsonArrayRequest设置HTTP标头 [英] Android-Volley : set HTTP Header for JsonArrayRequest
问题描述
所以我看过几个JsonObjectRequests的例子,其中添加了这个代码
so I've seen a couple of examples for JsonObjectRequests where either this code has been added
@Override
public String getBodyContentType() {
return "application/json";
}
有时使用此代码
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json");
return headers;
}
无论哪种方式,它总是与JsonObjectRequest结合使用。我真的不知道在JsonArrayRequest中添加 @Override
的方法。这就是我的JsonArrayRequest的样子
either way, it has always been used in combination with a JsonObjectRequest. I don't really know where to add the @Override
of the methods inside my JsonArrayRequest. This is how my JsonArrayRequest looks like
JsonArrayRequest localJReq = new JsonArrayRequest(localURL,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response){
try{
for (int i=0; i < response.length(); i++)
{
JSONObject jsonObject = response.getJSONObject(i);
String title = jsonObject.getString("Title");
data += "Beschreibung: "+title+"\n\n\n";
}
output.setText(data);
}catch (JSONException e){
e.printStackTrace();
}
}
},
new Response.ErrorListener(){
@Override
public void onErrorResponse(VolleyError error){
error.printStackTrace();
Toast.makeText(MainActivity.this, "No more Items Available",
Toast.LENGTH_LONG).show();
}
});
我试图将其添加到 {}
紧跟在最后一次结束)
之后,但这不起作用。我尝试将它放在 Response.Listener
中,这也无效。所以我有点困惑。
I've tried to add it in {}
just behind the last closing )
but that didn't work. I tried putting it inside the Response.Listener
which also didn't work. So I'm a little bit confused.
无论如何我觉得我做JsonArrayRequest真的很奇怪但是因为我的REST API正在接受HTML&作为响应的JSON,Volley似乎得到了HTML响应而不是JSON。这让我在我的应用程序中没有任何项目。这不是很奇怪吗?既然它是一个JsonRequest,那么Request不应该将内容类型设置为application / json吗?我希望通过将content-type设置为application / json,我将获得正确的响应类型。
Anyways I think it is really strange that I am making a JsonArrayRequest but since my REST API is accepting HTML & JSON as a response, Volley seems to get the HTML response instead of the JSON. Which is leaving me with no items inside my App. Isn't that kind of weird ? Since it is a JsonRequest shouldn't the Request set the content-type to application/json by its self? I'm hoping that by setting the content-type to application/json that I will get the correct response type.
推荐答案
您可以在请求结束时调用这些方法并在; $ c $之前调用c>
You can call those method at the end of the request and brefore;
JsonArrayRequest localJReq = new JsonArrayRequest(localURL,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {//here before semicolon ; and use { }.
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return super.getHeaders();
}
@Override
public String getBodyContentType() {
return super.getBodyContentType();
}
};
这篇关于Android-Volley:为JsonArrayRequest设置HTTP标头的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!