3

こんにちは、Android を使用して Web サービスからデータを読み込もうとしましたが、試行するたびに問題に直面します

今日、私は 3schools サイトから Web サービスを読み取ろうとしています

このコードを使用する

package com.example.lo2i03;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;

import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
//import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

public class MainActivity extends Activity {

    private static String SOAP_ACTION = "http://tempuri.org/CelsiusToFahrenheit";
    private static String NAMESPACE = "http://tempuri.org/";
    private static String METHOD_NAME = "CelsiusToFahrenheit";
    private static String URL = "http://www.w3schools.com/webservices/tempconvert.asmx?WSDL";
    TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         tv = (TextView)findViewById(R.id.txt);
         SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);             
         request.addProperty("Celsius","32"); 
         SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);
         envelope.setOutputSoapObject(request);
         envelope.dotNet = true;
         try
         {
               HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);          
               androidHttpTransport.call(SOAP_ACTION, envelope);             
               SoapObject result = (SoapObject)envelope.getResponse();
               tv.setText(result.getProperty(0).toString());
         }
         catch (Exception e) 
         {
              tv.setText("Error");
         }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

インターネットにアクセスするためのマニフェストに許可を追加したことを知って

それはキャッチブロックに直接行きます...

マニフェスト ファイル

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.lo2i03"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="16" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.lo2i03.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
        <uses-permission android:name="android.permission.INTERNET"></uses-permission>
</manifest>

Android バージョン: 4.2 - 4.2

LogCat エラーは次のようになります

11-24 01:28:29.065: E/Trace(13408): error opening trace file: No such file or directory (2)
11-24 01:28:29.195: D/AndroidRuntime(13408): Shutting down VM
11-24 01:28:29.195: W/dalvikvm(13408): threadid=1: thread exiting with uncaught exception (group=0x412862a0)
11-24 01:28:29.195: E/AndroidRuntime(13408): FATAL EXCEPTION: main
11-24 01:28:29.195: E/AndroidRuntime(13408): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lo2i03/com.example.lo2i03.MainActivity}: android.os.NetworkOnMainThreadException
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.os.Handler.dispatchMessage(Handler.java:99)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.os.Looper.loop(Looper.java:137)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.ActivityThread.main(ActivityThread.java:4898)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at java.lang.reflect.Method.invokeNative(Native Method)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at java.lang.reflect.Method.invoke(Method.java:511)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at dalvik.system.NativeStart.main(Native Method)
11-24 01:28:29.195: E/AndroidRuntime(13408): Caused by: android.os.NetworkOnMainThreadException
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at org.ksoap2.transport.ServiceConnectionSE.connect(ServiceConnectionSE.java:76)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:146)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:95)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at com.example.lo2i03.MainActivity.onCreate(MainActivity.java:35)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.Activity.performCreate(Activity.java:5191)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
11-24 01:28:29.195: E/AndroidRuntime(13408):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
11-24 01:28:29.195: E/AndroidRuntime(13408):    ... 11 more

新しいログキャット (1.0)

11-24 16:28:28.850: E/Trace(25195): error opening trace file: No such file or directory (2)
11-24 16:28:28.995: D/libEGL(25195): loaded /system/lib/egl/libEGL_mali.so
11-24 16:28:28.995: D/libEGL(25195): loaded /system/lib/egl/libGLESv1_CM_mali.so
11-24 16:28:29.000: D/libEGL(25195): loaded /system/lib/egl/libGLESv2_mali.so
11-24 16:28:29.000: D/(25195): Device driver API match
11-24 16:28:29.000: D/(25195): Device driver API version: 10
11-24 16:28:29.000: D/(25195): User space API version: 10 
11-24 16:28:29.000: D/(25195): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Wed Sep 12 17:53:53 KST 2012 
11-24 16:28:29.030: D/OpenGLRenderer(25195): Enabling debug mode 0
11-24 16:28:31.215: D/dalvikvm(25195): GC_CONCURRENT freed 214K, 10% free 12330K/13575K, paused 13ms+13ms, total 40ms
11-24 16:28:39.615: W/IInputConnectionWrapper(25195): getSelectedText on inactive InputConnection
11-24 16:28:39.615: W/IInputConnectionWrapper(25195): setComposingText on inactive InputConnection
11-24 16:28:39.615: W/IInputConnectionWrapper(25195): getExtractedText on inactive InputConnection

インターネットにアクセスするために (WiFi) を使用することを知っている。

何かアドバイス？

4

4 に答える 4

2

NetworkOnMainThreadException は、UI スレッド内で http 要求コードを実行していることを意味します。

このようなことを試してください：

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         tv = (TextView)findViewById(R.id.txt);
         final SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);             
         request.addProperty("Celsius","32"); 
         final SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);
         envelope.setOutputSoapObject(request);
         envelope.dotNet = true;
         new AsyncTask<Void, Void, Boolean>() {
            SoapObject obj;

            @Override
            protected Boolean doInBackground(Void... params) {
                   //here you can do your background network job
                try
                 {
                       HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);          
                       androidHttpTransport.call(SOAP_ACTION, envelope);             
                       obj = (SoapObject)envelope.getResponse();

                       return true;
                 }
                 catch (Exception e) 
                 {
                     e.printStackTrace();   
                         return false;                    
                 }
            }
            @Override
            protected void onPostExecute(Boolean result) {
             //here you can do your UI job
                if (!result) 
                    tv.setText("Error");
                else 
                    tv.setText(obj.getProperty(0).toString());
                super.onPostExecute(result);
            }
        }.execute();

    }
于 2012-11-23T23:21:25.560 に答える
1

マニフェスト ファイルにインターネットへのアクセス許可を追加します

   <uses-permission android:name="android.permission.INTERNET"></uses-permission>

次に、httpリクエストを実行しているアクティビティで、setContentViewの直前にこの行を追加します

 setContentView(R.layout.activity_profile);
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }
于 2015-05-14T07:51:59.650 に答える
1

SOAP Web サービスからオブジェクトを取得するには:

    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
    envelope. dotNet= true;
    envelope.setOutputSoapObject(request);
    HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
    try {
        androidHttpTransport.call(SOAP_VERATENDIMENTO, envelope);                    
        SoapObject result = (SoapObject) envelope.getResponse();            
        YourClass yourClass = new YourClass();
        if (result == null){
            return null;
        } else {
            yourClass.setName(result.getProperty("name").toString());
            yourClass.setEmail(result.getProperty("email").toString());
            return yourClass;               
        }                       
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (XmlPullParserException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }               
    return null;

配列リストを返すには、次のようにします。

    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
    envelope. dotNet= true;
    envelope.setOutputSoapObject(request);
    HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
    try {
        androidHttpTransport.call(SOAP_VERMENSAGENS, envelope);                    
        SoapObject result = (SoapObject) envelope.getResponse();            

        List<YourClassObject> yourList = new ArrayList<YourClassObject>();
        if (result == null){
            return null;
        } else {
            for(int i =0; i < result.getPropertyCount(); i++){
                SoapObject soap = (SoapObject) result.getProperty(i);
                YourClassObject yourClass = new YourClassObject();
                yourClass.setName(soap.getProperty("name").toString()));
                yourClass.setEmail(soap.getProperty("email").toString()));
                yourList.add(yourClass);
            }
            return yourList;
        }                       
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (XmlPullParserException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }               
    return null;
于 2012-11-26T10:28:54.790 に答える