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Android HttpClient : NetworkOnMainThreadExceptionAndroid應用客戶端採用Web服務
有麻煩林創建一個Android應用程序，它想成爲一個Web服務
我一個客戶端已經在java（eclipse）中創建。
這是很基本的，但它仍然無法正常工作..
Web服務類：
package com.ws;
public class Converter {
public Converter() {
}
public String sayHello(String name) {
return "Hello " + name + "!";
}
}
在Android應用程式類：（我用this教程爲）
package MyConverter.Android;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class access extends Activity {
private String METHOD_NAME = "";
// our webservice method name
private String NAMESPACE = "http://ws.com";
// Here package name in webservice with reverse order.
private String SOAP_ACTION = NAMESPACE + METHOD_NAME;
// NAMESPACE + method name
// private static final String URL =
private static final String URL = "http://my-ip:8080/ConverterWebSrvice/services/Converter";
// you must use ipaddress here, don’t use Hostname or localhost
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.access);
Button b2 = (Button) findViewById(R.id.button2);
b2.setOnClickListener(new OnClickListener(){
public void onClick(View v){
ws();
}});
}
public void ws() {
String name = "Dan";
METHOD_NAME = "sayHello";
try {
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
request.addProperty("name", name);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION, envelope);
Object result = envelope.getResponse();
((TextView) findViewById(R.id.textView1)).setText(name
+ " Longitude is : " + result.toString());
} catch (Exception E) {
E.printStackTrace();
((TextView) findViewById(R.id.textView1)).setText("ERROR:"
+ E.getClass().getName() + ":" + E.getMessage());
}
}
}
我這是怎麼運行整個事情：
1.我「運行方式>在服務器上運行」的轉換器項目
2.我做「身份運行> android應用程序'爲應用程序項目
模擬器運行，當我按下按鈕我收到「不幸」的消息。
在logcat的（在Eclipse）我看到以下消息：
10-19 22:29:41.250: W/System.err(643): android.os.NetworkOnMainThreadException
10-19 22:29:41.260: W/System.err(643): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
10-19 22:29:41.270: W/System.err(643): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
10-19 22:29:41.270: W/System.err(643): at libcore.io.IoBridge.connectErrno(IoBridge.java:144)
10-19 22:29:41.270: W/System.err(643): at libcore.io.IoBridge.connect(IoBridge.java:112)
10-19 22:29:41.270: W/System.err(643): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
10-19 22:29:41.280: W/System.err(643): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
10-19 22:29:41.280: W/System.err(643): at java.net.Socket.connect(Socket.java:842)
10-19 22:29:41.290: W/System.err(643): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:76)
10-19 22:29:41.290: W/System.err(643): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
10-19 22:29:41.300: W/System.err(643): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
10-19 22:29:41.300: W/System.err(643): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
10-19 22:29:41.300: W/System.err(643): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
10-19 22:29:41.300: W/System.err(643): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
10-19 22:29:41.310: W/System.err(643): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
10-19 22:29:41.310: W/System.err(643): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
10-19 22:29:41.320: W/System.err(643): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
10-19 22:29:41.320: W/System.err(643): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
10-19 22:29:41.320: W/System.err(643): at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188)
10-19 22:29:41.330: W/System.err(643): at org.ksoap2.transport.ServiceConnectionSE.openOutputStream(ServiceConnectionSE.java:109)
10-19 22:29:41.330: W/System.err(643): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:157)
10-19 22:29:41.350: W/System.err(643): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:96)
10-19 22:29:41.350: W/System.err(643): at MyConverter.Android.access.ws(access.java:53)
10-19 22:29:41.350: W/System.err(643): at MyConverter.Android.access$1.onClick(access.java:37)
10-19 22:29:41.360: W/System.err(643): at android.view.View.performClick(View.java:4084)
10-19 22:29:41.360: W/System.err(643): at android.view.View$PerformClick.run(View.java:16966)
10-19 22:29:41.370: W/System.err(643): at android.os.Handler.handleCallback(Handler.java:615)
10-19 22:29:41.380: W/System.err(643): at android.os.Handler.dispatchMessage(Handler.java:92)
10-19 22:29:41.390: W/System.err(643): at android.os.Looper.loop(Looper.java:137)
10-19 22:29:41.390: W/System.err(643): at android.app.ActivityThread.main(ActivityThread.java:4745)
10-19 22:29:41.402: W/System.err(643): at java.lang.reflect.Method.invokeNative(Native Method)
10-19 22:29:41.402: W/System.err(643): at java.lang.reflect.Method.invoke(Method.java:511)
10-19 22:29:41.410: W/System.err(643): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-19 22:29:41.410: W/System.err(643): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-19 22:29:41.410: W/System.err(643): at dalvik.system.NativeStart.main(Native Method)
10-19 22:29:41.420: D/AndroidRuntime(643): Shutting down VM
10-19 22:29:41.420: W/dalvikvm(643): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
10-19 22:29:41.450: E/AndroidRuntime(643): FATAL EXCEPTION: main
10-19 22:29:41.450: E/AndroidRuntime(643): java.lang.NullPointerException
10-19 22:29:41.450: E/AndroidRuntime(643): at MyConverter.Android.access.ws(access.java:60)
10-19 22:29:41.450: E/AndroidRuntime(643): at MyConverter.Android.access$1.onClick(access.java:37)
10-19 22:29:41.450: E/AndroidRuntime(643): at android.view.View.performClick(View.java:4084)
10-19 22:29:41.450: E/AndroidRuntime(643): at android.view.View$PerformClick.run(View.java:16966)
10-19 22:29:41.450: E/AndroidRuntime(643): at android.os.Handler.handleCallback(Handler.java:615)
10-19 22:29:41.450: E/AndroidRuntime(643): at android.os.Handler.dispatchMessage(Handler.java:92)
10-19 22:29:41.450: E/AndroidRuntime(643): at android.os.Looper.loop(Looper.java:137)
10-19 22:29:41.450: E/AndroidRuntime(643): at android.app.ActivityThread.main(ActivityThread.java:4745)
10-19 22:29:41.450: E/AndroidRuntime(643): at java.lang.reflect.Method.invokeNative(Native Method)
10-19 22:29:41.450: E/AndroidRuntime(643): at java.lang.reflect.Method.invoke(Method.java:511)
10-19 22:29:41.450: E/AndroidRuntime(643): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-19 22:29:41.450: E/AndroidRuntime(643): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-19 22:29:41.450: E/AndroidRuntime(643): at dalvik.system.NativeStart.main(Native Method)
10-19 22:29:44.060: I/Process(643): Sending signal. PID: 643 SIG: 9
任何幫助將不勝感激！
謝謝！它現在正在使用字符串，但是當我嘗試使用float時，例如，我得到：java.lang.RuntimeException：無法序列化：100.0。這是爲什麼？ – user1692261