Android排除请求无法正常工作
问题描述：
我必须使用排球库向网址发出POST请求。我已经建立了下面的自定义类凌空： - CustomJSONObjectRequestAndroid排除请求无法正常工作
import com.android.volley.AuthFailureError;
import com.android.volley.Response;
import com.android.volley.RetryPolicy;
import com.android.volley.toolbox.JsonObjectRequest;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.Map;
/**
* Created by user on 4/14/2016.
*/
public class CustomJSONObjectRequest extends JsonObjectRequest {
Map<String, String> mParams;
public CustomJSONObjectRequest(int method, String url, JSONObject jsonRequest,
Response.Listener<JSONObject> listener,
Response.ErrorListener errorListener) {
super(method, url, jsonRequest, listener, errorListener);
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
@Override
protected Map<String, String> getParams() throws AuthFailureError {
return mParams;
}
@Override
public RetryPolicy getRetryPolicy() {
// here you can write a custom retry policy
return super.getRetryPolicy();
}
}
CustomVolleyRequestQueue
import android.content.Context;
import com.android.volley.Cache;
import com.android.volley.Network;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.BasicNetwork;
import com.android.volley.toolbox.DiskBasedCache;
import com.android.volley.toolbox.HurlStack;
/**
* Created by Devastrix on 4/14/2016.
*/
public class CustomVolleyRequestQueue {
private static CustomVolleyRequestQueue mInstance;
private static Context mCtx;
private RequestQueue mRequestQueue;
private CustomVolleyRequestQueue(Context context) {
mCtx = context;
mRequestQueue = getRequestQueue();
}
public static synchronized CustomVolleyRequestQueue getInstance(Context context) {
if (mInstance == null) {
mInstance = new CustomVolleyRequestQueue(context);
}
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
Cache cache = new DiskBasedCache(mCtx.getCacheDir(), 10 * 1024 * 1024);
Network network = new BasicNetwork(new HurlStack());
mRequestQueue = new RequestQueue(cache, network);
// Don't forget to start the volley request queue
mRequestQueue.start();
}
return mRequestQueue;
}
}
我使用下面的函数使POST请求： -
RequestQueue mQueue = CustomVolleyRequestQueue.getInstance(context)
.getRequestQueue();
String url = "someURL";
Log.d("URL= ", url);
final CustomJSONObjectRequest jsonRequest = new CustomJSONObjectRequest(Request.Method.POST, url,
new JSONObject(), new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("post: ", response+"");
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String,String> params = new HashMap<String, String>();
params.put("A", "[[\"123\",\"456\",\"789\"]]"); // it is a json string actually
params.put("B", "23-11-2016");
params.put("C", "ABC");
return params;
//return query;
}
};
jsonRequest.setTag(TAG);
int socketTimeout = TIMEOUT;//30 seconds -
RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
jsonRequest.setRetryPolicy(policy);
mQueue.add(jsonRequest);
但问题是请求正在返回空数据，而当我使用某些第三方应用程序进行POST请求时，它会返回正确的结果。什么可能是可能的错误？
编辑 - 实际上，响应不为空。真实的回应是这样的。
{
"data" : ""
}
但数据的关键不应该有空洞value.SO我认为这是与PARAMS或PARAMS没有得到正确发送任何问题。但参数是完全正确的，我检查过。
答
请将此依赖项添加到您项目的build.gradle方法中。 之后添加您想要发送到服务器的参数。
compile 'com.android.volley:volley:1.0.0'
现在将此活动添加到您的项目中。
public class MainActivity extends AppCompatActivity {
private ProgressDialog progress_dialog;
private RequestQueue queue;
private HashMap<String, String> map = new HashMap<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
queue= Volley.newRequestQueue(getApplicationContext());
GetEventCodeResponse("[email protected]","4");
}
public void GetEventCodeResponse(String email,String event){
progress_dialog = new ProgressDialog(this);
progress_dialog.setMessage("Getting data, please wait a moment...");
progress_dialog.show();
map.put("username", email);
map.put("eventcode", event);
getResponseFromServer("your own url",map);
}
public void getResponseFromServer(String url, final HashMap<String, String> map) {
System.out.println("url----"+url);
StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.e("response reviw--",response);
progress_dialog.dismiss();
/* rating();*/
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
try{
Log.e("sign error password", new String(error.networkResponse.data));
}catch (Exception e){
Toast.makeText(MainActivity.this, "try again", Toast.LENGTH_SHORT).show();
}
progress_dialog.dismiss();
}
})
{
@Override
protected Map<String, String> getParams() {
return map;
}
};
queue.add(stringRequest);
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
100000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}
}
+0
无法正常工作...此代码实际上与我的工作相似 – devastrix
答
只是为了确认，请求绝对是成功的和你提供的请求被称为与响应是null的Response.Listener<JSONObject>实例的onResponse(JSONObject response)方法？
另外，是否有排球相关显示在logcat？
更新响应意见
我的感觉是，我们还没有锁定了您遇到的问题一个明确的根源，所以我不能保证下面的代码将解决它。但正如您所问，请尝试以下操作：
RequestQueue mQueue = CustomVolleyRequestQueue.getInstance(context).getRequestQueue();
String url = "someURL";
Log.d("URL= ", url);
final JSONObject requestBody;
try {
requestBody = new JSONObject();
requestBody.put("A", new JSONArray(new String[]{ "123", "456", "789" });
requestBody.put("B", "23-11-2016");
requestBody.put("C", "ABC");
} catch (JSONException exception) {
// error handling which, at least in theory, shouldn't be needed ...
}
final CustomJSONObjectRequest jsonRequest = new CustomJSONObjectRequest(Request.Method.POST, url,
requestBody, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("post: ", response+"");
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
jsonRequest.setTag(TAG);
int socketTimeout = TIMEOUT;//30 seconds -
RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
jsonRequest.setRetryPolicy(policy);
mQueue.add(jsonRequest);
您希望服务器响应成功的（2xx）POST而返回哪些数据？另外，该数据应该以何种格式存在？ JSON？ – clownba0t
数据为JSON格式。关键'数据'应该包含一些JSONObject，但是响应显示'数据'键具有空键。 – devastrix
我明白了。我能想到的唯一的事情是服务器真的没有为'data'属性返回任何东西。尝试在服务器端添加日志记录，以便您可以在构建响应时准确查看服务器打包到“数据”中的内容。或者，在应用程序方面，截取原始响应，然后将其中的数据转换为“JSONObject”，并检查其内容。你应该可以通过覆盖'protected Response parseNetworkResponse（NetworkResponse response）{'并使用调试器或日志记录来做到这一点。 –
clownba0t