我正在开发一个Android应用程序和java Jax rs Restful Web服务。当我的应用程序发送json服务时发生错误。如果我从Restful Client浏览器发送json服务成功接收数据但无法从Android应用程序接收.... 我的应用和服务代码在这里。这是我的Android活动。
public class feedback extends SameCodeClass implements View.OnClickListener {
String f_name, f_mobile, f_description, f_ratVel;
double f_rating;
RequestQueue requestQueue;
String responseServer;
feedbackModel fbModel;
private String TAG = feedback.class.getSimpleName();
private String tag_json_obj = "jobj_req", tag_json_arry = "jarray_req";
private ProgressDialog pDialog;
EditText name, mobile, des;
TextView rating;
RatingBar ratingBar;
Button submint_fb;
protected void onCreate(Bundle b) {
super.onCreate(b);
setContentView(R.layout.feedback);
Initialize();
addListenerOnRatingBar();
}
protected void Initialize() {
name = (EditText) findViewById(R.id.name);
mobile = (EditText) findViewById(R.id.mobile);
des = (EditText) findViewById(R.id.des);
rating = (TextView) findViewById(R.id.rating);
ratingBar = (RatingBar) findViewById(R.id.ratingBar);
submint_fb = (Button) findViewById(R.id.fsbutton);
submint_fb.setOnClickListener(this);
pDialog = new ProgressDialog(this);
pDialog.setMessage("Loading...");
pDialog.setCancelable(false);
requestQueue = Volley.newRequestQueue(this);
}
private void showProgressDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideProgressDialog() {
if (pDialog.isShowing())
pDialog.hide();
}
protected void setValues() {
f_name = name.getText().toString();
f_mobile = mobile.getText().toString();
f_description = des.getText().toString();
f_ratVel = rating.getText().toString();
f_rating = Double.parseDouble(f_ratVel);
if (f_name != null && f_mobile != null && f_description != null && f_rating != 0.0) {
// Toast.makeText(getBaseContext(),f_name+","+f_mobile+","+f_description+","+f_rating,Toast.LENGTH_LONG).show();
createJsonObj();
} else {
if (f_name.isEmpty()) {
Toast.makeText(getBaseContext(), "Enter Name First.", Toast.LENGTH_LONG).show();
} else if (f_mobile.isEmpty()) {
Toast.makeText(getBaseContext(), "Enter Mobile Number.", Toast.LENGTH_LONG).show();
} else if (f_description.isEmpty()) {
Toast.makeText(getBaseContext(), "Enter Your Message.", Toast.LENGTH_LONG).show();
} else if (f_ratVel.isEmpty()) {
Toast.makeText(getBaseContext(), "0.0 Rating Not Acceptable.", Toast.LENGTH_LONG).show();
}
}
}
// Volley Json Request...
private void createJsonObj() {
String url = "http://192.168.23.1:8080/RESTfulExample/rest/file/feedback";
showProgressDialog();
Map<String, String> jsonParams = new HashMap<String, String>();
//jsonParams.put("param1", youParameter);
jsonParams.put("name", f_name);
jsonParams.put("mobile", f_mobile);
jsonParams.put("description", f_description);
jsonParams.put("rating", f_ratVel);
JsonObjectRequest myRequest = new JsonObjectRequest(
Request.Method.POST,
url,
new JSONObject(jsonParams),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
// verificationSuccess(response);
Toast.makeText(getBaseContext(), response.toString(), Toast.LENGTH_LONG).show();
hideProgressDialog();
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// verificationFailed(error);
VolleyLog.d(TAG, "Error: " + error.getMessage());
hideProgressDialog();
NetworkResponse networkResponse = error.networkResponse;
if (networkResponse != null) {
Log.e("Volley", "Error. HTTP Status Code:" + networkResponse.statusCode);
}
if (error instanceof TimeoutError) {
Log.e("Volley", "TimeoutError");
} else if (error instanceof NoConnectionError) {
Log.e("Volley", "NoConnectionError");
} else if (error instanceof AuthFailureError) {
Log.e("Volley", "AuthFailureError");
} else if (error instanceof ServerError) {
Log.e("Volley", "ServerError");
} else if (error instanceof NetworkError) {
Log.e("Volley", "NetworkError");
} else if (error instanceof ParseError) {
Log.e("Volley", "Parse Error: "+ error.getMessage());
}
}
}) {
@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");
// headers.put("User-agent", "My useragent");
return headers;
}
@Override
public Priority getPriority() {
return Priority.IMMEDIATE;
}
};
requestQueue.add(myRequest);
}
public void addListenerOnRatingBar() {
ratingBar = (RatingBar) findViewById(R.id.ratingBar);
rating = (TextView) findViewById(R.id.rating);
//if rating value is changed,
//display the current rating value in the result (textview) automatically
ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
public void onRatingChanged(RatingBar ratingBar, float rat,
boolean fromUser) {
rating.setText(String.valueOf(rat));
}
});
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.fsbutton: {
if(isOnline()){
setValues();
// requestData("http://192.168.23.1:8080/RESTfulExample/rest/file/show");
}else{
Toast.makeText(this,"Network isn't available", Toast.LENGTH_LONG).show();
}
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id != R.id.fdb) {
DealMenu(id);
}
return super.onOptionsItemSelected(item);
}
@Override
public void onBackPressed() {
BackButtonHandle();
return;
}
protected boolean isOnline() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
return true;
} else {
return false;
}
}
}
现在我的服务方法接收了这个类的服务方法。
@POST
@Path("/feedback")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.TEXT_PLAIN)
public void postFeedback(newFeedModel fbkModel){
String name, mobile,description;
int rating;
f_name = fbkModel.getName();
f_mobile = fbkModel.getMobile().toString();
f_description = fbkModel.getDescription();
f_rating = fbkModel.getRating();
dataService.insertFeedback(f_name, f_mobile, f_description, f_rating);
}
我的反馈模型就在这里，......
package com.live.rest.Model;
import java.io.Serializable;
public class newFeedModel implements Serializable{
public String id;
public String name;
public String mobile;
public String description;
public String rating;
public void setId(String id) {
this.id = id;
}
public newFeedModel() {
super();
}
public newFeedModel(String name, String mobile, String description, String rating) {
super();
this.name = name;
this.mobile = mobile;
this.description = description;
this.rating = rating;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getRating() {
return rating;
}
public void setRating(String rating) {
this.rating = rating;
}
}
答案 0 :(得分：1)
您收到空白/空白回复。你没有得到异常，但json编码的文本是空的。
检查发布请求/获取请求 - 您在服务器端使用的内容。
检查API是否通过调试返回有效的json。
检查响应是否应该是有效的json。你可以在下面的链接中检查json是否有效。 Json Validator
检查您是否在Android Manifest中添加了以下权限。
<uses-permission android:name = "android.permission.INTERNET"/>
检查您是否有互联网连接。
参考链接：
Happpy Coding .. !!