我想发出一个服务器POST请求,发送一个JSON有效负载,并接收一个字符串响应。我到处寻找,似乎没有一种简单的方法来使用Volley库来做到这一点,而不是实现一个自定义请求(当我试图实现它时,我完全迷失了它)。执行此POST请求的“正确”方法是什么?
发布于 2016-07-29 06:02:18
final JSONObject body = new JSONObject();
try {
// Todo: populate JSON body
} catch (JSONException e) {
e.printStackTrace();
}
StringRequest stringRequest = new StringRequest(Request.Method.POST, "http://...",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}
) {
@Override
public byte[] getBody() throws AuthFailureError {
return body.toString().getBytes();
}
@Override
public String getBodyContentType() {
return "application/json";
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
发布于 2016-07-29 05:49:44
Volley有JsonObjectRequest和JsonArrayRequest。
/**
* Making json object request
* */
public void makeJsonObjReq(String url) {
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET,
url,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG, response.toString());
// msgResponse.setText(response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
}
}) {
/**
* Passing some request headers
* */
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json");
return headers;
}
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("name", "android@android.com");
return params;
}
};
// Adding request to request queue
ApplicationController.getInstance().addToRequestQueue(jsonObjReq,
tag_json_obj);
// Cancelling request
// ApplicationController.getInstance().getRequestQueue().cancelAll(tag_json_obj);
}
/**
* Making json array request
* */
public void makeJsonArryReq(String url, final int _type) {
JsonArrayRequest req = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
apiTaskListener.onTaskComplete("error",_type);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
apiTaskListener.onTaskComplete("error",_type);
}
});
// Adding request to request queue
ApplicationController.getInstance().addToRequestQueue(req,
tag_json_arry);
// Cancelling request
// ApplicationController.getInstance().getRequestQueue().cancelAll(tag_json_arry);
}
https://stackoverflow.com/questions/38651055
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