这是我的spinner下拉列表，它从server.Json响应就像那样
[{"ServiceId":"1","ServiceName":"AC"},
{"ServiceId":"5","ServiceName":"Plumbing"},
{"ServiceId":"27","ServiceName":"Others"}]
我正在尝试为ref发送服务ID。相应的服务名称对数据库，但到目前为止只有最后一个服务ID保存在数据库中。即。服务ID没有得到相应的服务名称。如何解决这个问题？
adapter = new ArrayAdapter<String>(this, R.layout.spinner_layout_adapter, R.id.txt, listItems);
// adapter.add("Select Service");
// service_need.setAdapter(adapter);
Bundle bundle = getIntent().getExtras();
String stuff1 = bundle.getString("local");
autoCompView.setText(stuff1);
String name = bundle.getString("name");
adapter.add(name);
service_need.setAdapter(adapter);
}
private void registerUser() {
final SharedPreferences mSharedPreference= PreferenceManager.getDefaultSharedPreferences(getBaseContext());
final String value=(mSharedPreference.getString("customerId", "Default_Value"));
final String customer_id =value.toString().trim();
final String username = editname.getText().toString().trim();
final String house = houseNo.getText().toString().trim();
final String local_area = autoCompView.getText().toString().trim();
final String service = obj.getBytes().toString().trim();
final String mobile_no = mobile.getText().toString().trim();
final String email_id = email.getText().toString().trim();
final String prob = problem.getText().toString().trim();
StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
hidePDialog();
try {
//String result="";
//Do it with this it will work
JSONArray jsonarray = new JSONArray(response);
for (int i = 0; i < jsonarray.length(); i++) {
JSONObject person = jsonarray.getJSONObject(i);
String excep = person.getString("Exception");
String message1 = person.getString("Message");
String job = person.getString("JobNo");
if (excep.equalsIgnoreCase("True")) {
Toast.makeText(Form.this, excep, Toast.LENGTH_LONG)
.show();
} else {
Toast.makeText(Form.this, excep, Toast.LENGTH_LONG)
.show();
editname.setText("");
// if email and mb is valid than login
Intent i1 = new Intent(Form.this, Suceessful.class);
i1.putExtra("job_id", job);
startActivity(i1);
finish();
Toast.makeText(Form.this, excep.toString(), Toast.LENGTH_LONG).show();
Toast.makeText(Form.this, message1.toString(), Toast.LENGTH_LONG).show();
Toast.makeText(Form.this, job.toString(), Toast.LENGTH_LONG).show();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(Form.this, error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(CUSTOMERID,customer_id);
params.put(USERNAME, username);
params.put(HOUSENO, house);
params.put(LOCALITY, local_area);
params.put(SERVICE, obj);
params.put(MOBILE, mobile_no);
params.put(EMAIL, email_id);
params.put(PROBLEM, prob);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
public void onStart() {
super.onStart();
BackTask bt = new BackTask();
bt.execute();
}
private class BackTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected void onPreExecute() {
super.onPreExecute();
list = new ArrayList<>();
}
protected Void doInBackground(Void... params) {
InputStream is = null;
String result = "";
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://my_url/GetServiceList");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
// Get our response as a String.
is = entity.getContent();
} catch (IOException e) {
e.printStackTrace();
}
//convert response to string
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "utf-8"));
String line = null;
while ((line = reader.readLine()) != null) {
result += line;
}
is.close();
//result=sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
// parse json data
try {
JSONArray jArray = new JSONArray(result);
for (int i = 0; i < jArray.length(); i++) {
JSONObject jsonObject = jArray.getJSONObject(i);
// add interviewee name to arraylist
list.add(jsonObject.getString("ServiceName"));
// list.add(jsonObject.getString("ServiceId"));
obj =jsonObject.getString("ServiceId");
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Void result) {
listItems.addAll(list);
adapter.notifyDataSetChanged();
}
}
}
日志
09-01 14:21:41.243 5800-6053/com.enventpc_03.service99 I/System.out: URL: https://maps.googleapis.com/maps/api/place/autocomplete/json?key=AIzaSyBdNoHzzo8PlGtv8Xa96uMZdKJbv6N8m8Q&components=country:in&components=administrative_area_level_3:lucknow&input=ddfss
09-01 14:21:41.643 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"AC","ServiceId":"1"}
09-01 14:21:41.653 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Plumbing","ServiceId":"5"}
09-01 14:21:41.673 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Refrigerator","ServiceId":"3"}
09-01 14:21:41.683 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Appliances","ServiceId":"7"}
09-01 14:21:41.763 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"RO","ServiceId":"21"}
09-01 14:21:42.363 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Electrical","ServiceId":"6"}
09-01 14:21:42.393 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Mobile","ServiceId":"4"}
09-01 14:21:42.663 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Computers","ServiceId":"9"}
09-01 14:21:42.693 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Tablets","ServiceId":"8"}
09-01 14:21:42.693 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Home Security","ServiceId":"22"}
09-01 14:21:42.704 5800-6131/com.enventpc_03.service99 D/jsonObject: {"ServiceName":"Others","ServiceId":"27"}
09-01 14:21:43.273 302-424/system_process A/NetworkStats: problem reading network stats
java.lang.IllegalStateException: problem parsing line: null
at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:313)
at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1271)
at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:810)
at com.android.server.net.NetworkStatsService.performPoll(NetworkStatsService.java:771)
at com.android.server.net.NetworkStatsService.access$100(NetworkStatsService.java:128)
at com.android.server.net.NetworkStatsService$3.onReceive(NetworkStatsService.java:610)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.os.HandlerThread.run(HandlerThread.java:60)
Caused by: java.io.FileNotFoundException: /proc/net/xt_qtaguid/stats: open failed: ENOENT (No such file or directory)
at libcore.io.IoBridge.open(IoBridge.java:406)
at java.io.FileInputStream.<init>(FileInputStream.java:78)
at java.io.FileReader.<init>(FileReader.java:42)
at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:272)
at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1271)
at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:810)
at com.android.server.net.NetworkStatsService.performPoll(NetworkStatsService.java:771)
at com.android.server.net.NetworkStatsService.access$100(NetworkStatsService.java:128)
at com.android.server.net.NetworkStatsService$3.onReceive(NetworkStatsService.java:610)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.os.HandlerThread.run(HandlerThread.java:60)
Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:98)
at libcore.io.IoBridge.open(IoBridge.java:390)
at java.io.FileInputStream.<init>(FileInputStream.java:78)
at java.io.FileReader.<init>(FileReader.java:42)
at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:272)
at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1271)
at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:810)
at com.android.server.net.NetworkStatsService.performPoll(NetworkStatsService.java:771)
at com.android.server.net.NetworkStatsService.access$100(NetworkStatsService.java:128)
at com.android.server.net.NetworkStatsService$3.onReceive(NetworkStatsService.java:610)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.os.HandlerThread.run(HandlerThread.java:60)
答案 0 :(得分：0)
You have to initialize list inside the for loop this is call by reference problem. So do the following :
....
// parse json data
try {
JSONArray jArray = new JSONArray(result);
for (int i = 0; i < jArray.length(); i++) {
list = new ArrayList<>();
JSONObject jsonObject = jArray.getJSONObject(i);
// add interviewee name to arraylist
list.add(jsonObject.getString("ServiceName"));
list.add(jsonObject.getString("ServiceId"));
obj =jsonObject.getString("ServiceId");
}
} catch (JSONException e) {
e.printStackTrace();
}
...