0
我正在開發和andeoid應用程序，它會消耗一個寧靜的Web服務，從Mysql數據庫中檢索數據。 所以我試圖在我的ListView上顯示webMethode的結果，但列表總是空的。 結果是JSON格式，但是作爲字符串。Android：結果從Restful WS沒有顯示在我的ListView
我犯了一個包含列表視圖佈局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="La liste des DAB" />
<ListView
android:id="@+id/lstdab"
style="@style/Widget.AppCompat.ListView.DropDown"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible" />
</LinearLayout>
包含列表視圖的項目佈局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp" >
<TextView
android:id="@+id/id"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="@+id/libdab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="@+id/libe"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:textColor="#acacac" />
<TextView
android:id="@+id/zone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:textColor="#5d5d5d"
android:textStyle="bold" />
</LinearLayout>
這是我的活動，將填補從收到的ListView webMethode在Restful WebService上使用URL：
package com.example.projetmonitoringapplication;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.ArrayList;
import cz.msebera.android.httpclient.HttpResponse;
import cz.msebera.android.httpclient.client.HttpClient;
import cz.msebera.android.httpclient.client.methods.HttpGet;
import cz.msebera.android.httpclient.impl.client.DefaultHttpClient;
import cz.msebera.android.httpclient.util.EntityUtils;
/**
* Created by Emel on 24/04/2017.
*/
public class listez extends AppCompatActivity {
ListView list;
// BaseAdapter2 adapter;
ArrayList<Dabl> arrayOfWebData = new ArrayList<Dabl>();
//this is our result object
class Dabl {
int id ;
String libdab;
String etat;
String des ;
String zone ;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listezonelayout);
list = (ListView) findViewById(R.id.lstdab);
new TheTask().execute();
}
adapter aa ;
class adapter extends ArrayAdapter<listez.Dabl> {
adapter() {
super(listez.this, android.R.layout.simple_list_item_1, arrayOfWebData);
}
public View getView(int position, View convertView,
ViewGroup parent) {
ViewHolder holder;
if (convertView==null) {
LayoutInflater inflater=getLayoutInflater();
convertView=inflater.inflate(R.layout.listdabzitem, null);
holder=new listez.ViewHolder(convertView);
convertView.setTag(holder);
}
else
{
holder=(ViewHolder)convertView.getTag();
}
holder.populateFrom(arrayOfWebData.get(position));
return(convertView);
}
}
class ViewHolder {
public TextView idd=null;
public TextView lib=null;
public TextView et=null;
public TextView des=null;
public TextView zone=null;
ViewHolder(View row) {
idd=(TextView)row.findViewById(R.id.id);
lib=(TextView)row.findViewById(R.id.libdab);
et=(TextView)row.findViewById(R.id.tet);
des=(TextView)row.findViewById(R.id.libe);
zone=(TextView)row.findViewById(R.id.zone);
}
//notice we had to change our populate from to take an arguement of type person
void populateFrom(Dabl r) {
idd.setText(r.id);
lib.setText(r.libdab);
et.setText(r.etat);
des.setText(r.des);
zone.setText(r.zone);
}
}
class TheTask extends AsyncTask<Void, Void, String> {
@Override
protected String doInBackground(Void... params) {
String str = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpGet httppost = new HttpGet(
"http://10.0.2.2:8180/ProjetMonitoring/RestApp/DA/RechercherDABzTunis");
HttpResponse response = httpclient.execute(httppost);
str = EntityUtils.toString(response.getEntity());
Log.e("test", "----" + str);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return str;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
String response = result.toString();
try {
JSONArray jArray = new JSONArray(response);
for (int i = 0, count = jArray.length(); i < count; i++) {
//get our object, this is one person's worth of data
JSONObject json_data = jArray.getJSONObject(i);
Log.i("try jaaray ob ",json_data.toString());
//create a new person
Dabl resultRow = new Dabl();
//set that person's attributes
resultRow.id = json_data.getInt("id_DAB");
resultRow.libdab = json_data.getString("Libelle_DAB");
resultRow.etat = json_data.getString("etat");
resultRow.des= json_data.getString("description");
resultRow.zone= json_data.getString("zone");
//this is our arrayList object, we add our Person object to it
arrayOfWebData.add(resultRow);
}
ListView myListView = (ListView)findViewById(R.id.lstdab);
aa=new adapter();
myListView.setAdapter(aa);
String s=myListView.getItemAtPosition(1).toString();
Log.i("ITEM",s);
} catch (JSONException e) {
// TODO Auto-genrror2");
Log.e("ERROR", "ERROR IN CODE: " + e.toString());
e.printStackTrace();
}
}
}
}
不關注我的通訊ents或未使用的變量。 所以excuting這之後這就是我得到我的logcat的，即使我是顯示給測試沒有出現log.e：
04-24 20:51:29.355 20374-20636/com.example.projetmonitoringapplication E/test: ----["{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":22,\"etat\":\"En marche\",\"Libelle_DAB\":\"\"}","{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":26,\"etat\":\"En marche\",\"Libelle_DAB\":\"ooo\"}","{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":27,\"etat\":\"En marche\",\"Libelle_DAB\":\"\"}","{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":6660,\"etat\":\"En marche\",\"Libelle_DAB\":\"yyy\"}"]
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication E/ERROR: ERROR IN CODE: org.json.JSONException: Value {"zone":"Tunis","description":"le DAB fonctionne correctement.","id_DAB":22,"etat":"En marche","Libelle_DAB":""} at 0 of type java.lang.String cannot be converted to JSONObject
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: org.json.JSONException: Value {"zone":"Tunis","description":"le DAB fonctionne correctement.","id_DAB":22,"etat":"En marche","Libelle_DAB":""} at 0 of type java.lang.String cannot be converted to JSONObject
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at org.json.JSON.typeMismatch(JSON.java:100)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at org.json.JSONArray.getJSONObject(JSONArray.java:514)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at com.example.projetmonitoringapplication.listez$TheTask.onPostExecute(listez.java:141)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at com.example.projetmonitoringapplication.listez$TheTask.onPostExecute(listez.java:106)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at android.os.AsyncTask.finish(AsyncTask.java:632)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at android.os.AsyncTask.access$600(AsyncTask.java:177)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at android.os.Looper.loop(Looper.java:136)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5021)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at java.lang.reflect.Method.invokeNative(Native Method)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at java.lang.reflect.Method.invoke(Method.java:515)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)
04-24 20:51:29.365 20374-20374/com.example.projetmonitoringapplication W/System.err: at dalvik.system.NativeStart.main(Native Method)
這是我WebMethode：
// DAB zone Tunis
@GET
@Path("/RechercherDABzTunis")
@Produces(MediaType.APPLICATION_JSON)
// @Consumes(MediaType.APPLICATION_JSON)
public String DABtunis()
throws SQLException, JSONException {
JSONObject obj = new JSONObject();
JSONArray array=new JSONArray();
dbCoN = new DBConnection();
query = "SELECT dab.id_DAB, dab.libelle_DAB , etat.titre_etat , etat.libelle,zone.nom_zone FROM dab, agence,zone,etat where dab.id_agence=agence.id_agence and agence.id_zone=zone.id_zone and zone.nom_zone='Tunis' GROUP by dab.id_DAB;";
try {
conn = (Connection) DBConnection.createConnection();
rslt = dbCoN.getResutlSet(query, conn);
System.out.println("try here ! ! ! ");
if (rslt.next()) {
while (rslt.next()){
obj = DAB.DABzoneToJson(rslt.getInt("id_DAB"),rslt.getString("libelle_DAB"),rslt.getString("titre_etat"),rslt.getString("libelle"),rslt.getString("nom_zone"));
array.put(obj.toString());
System.out.println(rslt.getString(1).toString());
}
}
else {
obj=DAB.DABToJsonFaux();
array.put(obj.toString());
System.out.println("");
}
} catch (SQLException e){
System.out.println("exception here sql! ! "+e);
} catch (Exception ex){
System.out.println("exception here ! ! "+ex);
} finally {
if (conn != null) {
conn.close();
}
}
//JSONObject jobj=new JSONObject();
// jobj.put("array", array.toString());
return array.toString();
}
我認爲問題在於這兩個例外，但我沒有看到任何錯誤。 這是我webMethodeØ郵遞員的結果：
[
"{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":22,\"etat\":\"En marche\",\"Libelle_DAB\":\"\"}",
"{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":26,\"etat\":\"En marche\",\"Libelle_DAB\":\"ooo\"}",
"{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":27,\"etat\":\"En marche\",\"Libelle_DAB\":\"\"}",
"{\"zone\":\"Tunis\",\"description\":\"le DAB fonctionne correctement.\",\"id_DAB\":6660,\"etat\":\"En marche\",\"Libelle_DAB\":\"yyy\"}"
]
i'm using Android Studio , and wildfly 8 as a server, my web Service is a r
estful我有完美的作品相同的應用程序登錄的活動，我覺得probleme是在解析，但我看不出錯誤，有人可以請一下嗎？謝謝！
更新：我添加asyncTask，如你所說，沒有即時從日誌中的webService接收結果，但我仍然無法顯示它在ListView上，我更新了我的活動代碼，日誌也！
嘗試使用凌空用於檢索數據 – theSereneRebel