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我正在制作一个应用程序，它只需使用POST metod将数据发送到数据库。我遇到的问题是应用程序在发送时不做任何事情：没有崩溃，没有错误，什么都没有。我已经单独测试了PHP代码，并且它可以工作，所以我确定问题出在代码中，但是我找不到它。你可以帮我吗？我很抱歉var语言不是英语。Android应用程序无法将数据发送到远程服务器
的Android代码：
public class AggiungiProdotto extends Activity {
private static String indirizzo = "http://10.0.2.2/tesina/Aggiungi_Ordinazione";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.aggiungi_prodotto);
new AggiungoOrdinazione().execute();
}
private class AggiungoOrdinazione extends AsyncTask < String, Void, String > {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String...arg0) {
InputStream is = null;
String result = "";
JSONObject jsonResult = null;
TextView tv;
//Intent intent = getIntent();
String Nome = new String();
//String Tavolo = intent.getStringExtra("Tavolo");
int NumTavolo = 1;
String Tavolo = Integer.toString(NumTavolo);
Nome = "ciao";
HttpPost httppost = new HttpPost(indirizzo);
HttpParams httpParams = new BasicHttpParams();
int timeOutConnection = 5000;
HttpConnectionParams.setConnectionTimeout(httpParams, timeOutConnection);
int timeoutSocket = 5000;
HttpConnectionParams.setSoTimeout(httpParams, timeoutSocket);
HttpClient httpclient = new DefaultHttpClient(httpParams);
List <NameValuePair> Comanda = new ArrayList <NameValuePair>();
Comanda.add(new BasicNameValuePair("Nome", Nome));
Comanda.add(new BasicNameValuePair("Tavolo", Tavolo));
try {
httppost.setEntity(new UrlEncodedFormEntity(Comanda));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
StringBuilder sb = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result = sb.toString();
jsonResult = new JSONObject(result);
} catch(UnsupportedEncodingException e) {
e.printStackTrace();
} catch(ClientProtocolException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
} catch(JSONException e) {
e.printStackTrace();
}
return null;
}
}
protected void onPostExecute() {
}
}
PHP代码：
$Nome;
$Tavolo;
$Risposta = array();
//Apro la connessione con il server mySQL
$Conn = mysql_connect("localhost", "root", "");
if(!$Conn) {
die('Errore di connessione: '.mysql_error());
}
//Seleziono il mio database
$DBS = mysql_select_db('ordinazioni', $Conn);
if(!$DBS) {
die('Accesso al database non riuscito: '.mysql_error());
}
//echo "Mi sono connesso!";
$Nome = $_POST['Nome'];
$Tavolo = $_POST['Tavolo'];
$strSQL = mysql_query("INSERT INTO Comande (Nome, Tavolo) VALUES ('$Nome', '$Tavolo')");
if($strSQL) {
$Risposta["Esito"] = 1;
$Risposta["Messaggio"] = "Comanda aggiunta!";
echo json_encode($Risposta);
echo "Ho aggiunto!";
}
else {
$Risposta["Esito"] = 0;
$Risposta["Messaggio"] = "Errore nell'aggiunta!";
echo "Non ho aggiunto!";
echo json_encode($Risposta);
}
?>
清单：
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.gabriele.tesina.Menu_Iniziale"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.gabriele.tesina.Listino"
android:label="Il Nostro Menù" >
</activity>
<activity
android:name="com.gabriele.tesina.Ordinazioni_Cuoco"
android:label="Le pietanze da preparare" >
</activity>
<activity
android:name="com.gabriele.tesina.Ordinazioni_Pizza"
android:label="Le pizze da infornare" >
</activity>
<activity android:name="com.gabriele.tesina.Primi" />
<activity android:name="com.gabriele.tesina.Secondi" />
<activity android:name="com.gabriele.tesina.Contorni" />
<activity android:name="com.gabriele.tesina.Dolci" />
<activity android:name="com.gabriele.tesina.Pizze" />
<activity android:name="com.gabriele.tesina.Bevande" />
<activity
android:name="com.gabriele.tesina.AggiungiProdotto"
android:label="Aggiungi Prodotto" >
</activity>
</application>
logcat的：
03-09 14:43:09.347: W/Trace(771): Unexpected value from nativeGetEnabledTags: 0
03-09 14:43:09.737: W/System.err(771): org.json.JSONException: Value <!DOCTYPE of type java.lang.String cannot be converted to JSONObject
03-09 14:43:09.737: W/System.err(771): at org.json.JSON.typeMismatch(JSON.java:111)
03-09 14:43:09.737: W/System.err(771): at org.json.JSONObject.<init>(JSONObject.java:158)
03-09 14:43:09.747: W/System.err(771): at org.json.JSONObject.<init>(JSONObject.java:171)
03-09 14:43:09.747: W/System.err(771): at com.gabriele.tesina.AggiungiProdotto$AggiungoOrdinazione.doInBackground(AggiungiProdotto.java:113)
03-09 14:43:09.758: W/System.err(771): at com.gabriele.tesina.AggiungiProdotto$AggiungoOrdinazione.doInBackground(AggiungiProdotto.java:1)
03-09 14:43:09.758: W/System.err(771): at android.os.AsyncTask$2.call(AsyncTask.java:287)
03-09 14:43:09.767: W/System.err(771): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
03-09 14:43:09.767: W/System.err(771): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
03-09 14:43:09.777: W/System.err(771): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
03-09 14:43:09.777: W/System.err(771): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
03-09 14:43:09.777: W/System.err(771): at java.lang.Thread.run(Thread.java:856)
谢谢你的帮助。
这可能是因为你没有从服务器获得有效的JSON。使用调试进行检查。 – 2013-03-09 16:03:41
如何？我非常喜欢，但我找不到有关此的有用文档。 – Eulante 2013-03-09 16:07:12