【发布时间】：2016-03-29 06:59:16
【问题描述】：
我从发布参数到我的服务器时收到一个错误，就像我的参数根本没有传递到我的服务器一样......我得到的是：
D/Searching: Error: org.json.JSONException: Value {"error_msg":"please choose city to view taxi list"}
该消息仅在我的服务器端 isset($_POST['from'] 等时才会出现
这是我的代码：
// Creating volley request obj
JsonArrayRequest taxiReq = new JsonArrayRequest(Request.Method.POST, url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Taxi taxi = new Taxi();
taxi.settaxiname(obj.getString("taxiname"));
taxi.setThumbnailUrl(obj.getString("image"));
taxi.setdeparture(obj.getString("departure"));
taxi.setarrive(obj.getString("arrive"));
taxi.setseat(obj.getInt("seat"));
taxi.setcost(obj.getInt("cost"));
// adding taxi to taxi array
taxiList.add(taxi);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d(TAG, "Error: " + error.getMessage());
}
})
{
@Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<String, String>();
params.put("from", textfrom_btn);
params.put("to", textto_btn);
params.put("seat", totalpassenger);
return params;
}
};
// Adding request to request queue
MyApplication.getInstance().addToRequestQueue(taxiReq);
这是json：
[
{
"image": "http://localhost/androidapp/taxiprofile/1.jpg",
"taxiname": "Taxi 1",
"from": "PTK",
"to": "SGU",
"departure": "08:00:00",
"arrive": "13:00:00",
"seat": 7,
"cost": 12
},
{
"image": "http://localhost/androidapp/taxiprofile/default.jpg",
"taxiname": "Taxi 2",
"from": "PTK",
"to": "SGU",
"departure": "08:00:00",
"arrive": "13:00:00",
"seat": 2,
"cost": 15
},
{
"image": "http://localhost/androidapp/taxiprofile/2.jpg",
"taxiname": "Taxi Untung Selalu",
"from": "PTK",
"to": "SGU",
"departure": "09:00:00",
"arrive": "14:00:00",
"seat": 3,
"cost": 13
}
]
这里是我服务器中的 php 代码：
<?php
include './include/DbHandler.php';
$db = new DbHandler();
// json response array
$response = array();
if (isset($_POST['from']) && isset($_POST['to']) && isset($_POST['totalpassenger'])) {
// receiving the post params
$from = $_POST['from'];
$to = $_POST['to'];
$totalpassenger = $_POST['totalpassenger'];
// get the user by email and password
$taxilist = $db->getTaxi($from, $to, $totalpassenger);
if ($taxilist != false) {
// taxi is found
foreach( $taxilist as $data ){
$response[] = array(
"image" => "http://".$_SERVER['SERVER_NAME'].dirname($_SERVER['REQUEST_URI']).$data["image"],
"taxiname" => $data["taxiname"],
"from" => $data["from"],
"to" => $data["to"],
"departure" => $data["departure"],
"arrive" => $data["arrive"],
"seat" => $data["seat"],
"cost" => $data["cost"]
);
}
echo json_encode($response);
} else {
$response["error_msg"] = "Sorry taxi is not listed";
echo json_encode($response);
}
} else {
$response["error_msg"] = "please choose city to view taxi list";
echo json_encode($response);
}
?>
代码中有语法错误吗？
编辑 这是我使用 CustomJsonRequest 后的 logcat
03-29 16:11:06.070 25258-25258/com.testing W/EGL_genymotion: eglSurfaceAttrib not implemented
03-29 16:11:06.078 25258-25258/com.testing D/OpenGLRenderer: TextureCache::get: create texture(0xb85fe538): name, size, mSize = 389, 5184, 173360
03-29 16:11:06.082 25258-25258/com.testing D/OpenGLRenderer: TextureCache::get: create texture(0xb8489018): name, size, mSize = 391, 19264, 192624
03-29 16:11:55.714 25258-25258/com.testing D/Searching: []
【问题讨论】：
-
收到上述 json 响应后，您是如何发出 post 请求的？请提及帖子变量
-
它们是 textfrom_btn = "PTK", textto_btn = "SGU", totalpassenger = 2...这些是我试图传递给我的 php 的变量...这些是什么意思发布变量？
-
你能展示你服务器的完整代码吗？您的 JsonArrayRequest 看起来有效
-
似乎您没有将所有参数传递给服务器。再次检查您的
POST参数 -
再次查看我的帖子，我的服务器上已包含代码...
标签： android json android-volley