webservice(ksoap)的android.os.NetworkOnMainThreadException [英] android.os.NetworkOnMainThreadException for webservice (ksoap)
问题描述
我使用Android 4.1,我的IDE是Eclipse Juno。我认为编程的一部分是确定的,但可能是连接有问题。
package com.example.webserviceexample;
import java.io.IOException;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.SoapFault;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
final static String NAMESPACE =http://tempuri.org/;
final static String METHOD_NAME =CelsiusToFahrenheit;
final static String SOAP_ACTION =http://tempuri.org/CelsiusToFahrenheit;
final static String URL =http://www.w3schools.com/webservices/tempconvert.asmx;
TextView sonuc;
EditText deger;
按钮hesapla;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
deger =(EditText)findViewById(R.id.deger);
sonuc =(TextView)findViewById(R.id.flag);
hesapla =(Button)findViewById(R.id.hesapla);
hesapla.setOnClickListener(new OnClickListener(){
public void onClick(View v){
//请求信息
SoapObject Request = new SoapObject(NAMESPACE,METHOD_NAME);
Request.addProperty(Celcius,deger.getText()。toString());
//信封
SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
soapEnvelope.dotNet = true; //.NET = true,php = false
//向信封发送请求
soapEnvelope。 setOutputSoapObject(Request);
//传输数据
HttpTransportSE aht = new HttpTransportSE(URL); //准备
// start
try {
aht.call(SOAP_ACTION,soapEnvelope);
}
catch(IOException e){
e.printStackTrace();
}
catch(XmlPullParserException e)
{
e.printStackTrace();
}
//等待并获得响应。
字符串结果;
try {
//我们正在创建SoapPrimitive Object等待简单变量。
result =Fahrenheit:+ soapEnvelope.getResponse();
//将结果写入textView
sonuc.setText(result);
}
catch(SoapFault e){
e.printStackTrace();
}
}
});
}
@Override
public boolean onCreateOptionsMenu(菜单菜单){
getMenuInflater()。inflate(R.menu.activity_main,menu);
返回true;
}
}
但是,我收到这个错误:
08-15 11:45:26.294:E / AndroidRuntime(641):FATAL EXCEPTION:main
08-15 11:45 :26.294:E / AndroidRuntime(641):android.os.NetworkOnMainThreadException
08-15 11:45:26.294:E / AndroidRuntime(641):android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java: 1117)
08-15 11:45:26.294:E / AndroidRuntime(641):java.net.InetAddress.lookupHostByName(InetAddress.java:385)
08-15 11:45:26.294: E / AndroidRuntime(641):在java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
08-15 11:45:26.294:E / AndroidRuntime(641):在java.net.InetAddress.getAllByName (InetAddress.java:214)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpConnection。< init>(HttpConnection.java:70)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpConnection。< init>(HttpConnection.java:50)
08-15 11:45:26.294: E / AndroidRun时间(641):在libcore.net.http.HttpConnection $ Address.connect(HttpConnection.java:341)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http .HttpConnectionPool.get(HttpConnectionPool.java:87)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpEngine .sendSocketRequest(HttpEngine.java:289)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
08-15 11:45:26.294:E / AndroidRuntime(641):在libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
08-15 11:45:26.294:E / AndroidRuntime 641):在org.ksoap2.transport.ServiceCo nnectionSE.connect(ServiceConnectionSE.java:76)
08-15 11:45:26.294:E / AndroidRuntime(641):在org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:146)
08-15 11:45:26.294:E / AndroidRuntime(641):在org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:95)
08-15 11:45:26.294:E / AndroidRuntime (641):at com.example.webserviceexample.MainActivity $ 1.onClick(MainActivity.java:61)
08-15 11:45:26.294:E / AndroidRuntime(641):在android.view.View.performClick (View.java:4084)
08-15 11:45:26.294:E / AndroidRuntime(641):在android.view.View $ PerformClick.run(View.java:16966)
08- 15 11:45:26.294:E / AndroidRuntime(641):android.os.Handler.handleCallback(Handler.java:615)
08-15 11:45:26.294:E / AndroidRuntime(641):at android.os.Handler.dispatchMessage(Handler.java:92)
08-15 11:45:26.294:E / AndroidRuntime(641):android.os.Looper.loop(Looper.java:137)
08-15 11:45:26.294:E / AndroidRuntime(641):android.app.ActivityThread.main (ActivityThread.java:4745)
08-15 11:45:26.294:E / AndroidRuntime(641):java.lang.reflect.Method.invokeNative(Native Method)
08-15 11: 45:26.294:E / AndroidRuntime(641):在java.lang.reflect.Method.invoke(Method.java:511)
08-15 11:45:26.294:E / AndroidRuntime(641):at com .android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:786)
08-15 11:45:26.294:E / AndroidRuntime(641):在com.android.internal.os.ZygoteInit。 main(ZygoteInit.java:553)
08-15 11:45:26.294:E / AndroidRuntime(641):at dalvik.system.NativeStart.main(Native Method)
那么可能是什么问题?
您不能在主线程上执行网络操作。
结帐: http://developer.android.com/reference/ android / os / AsyncTask.html
无痛背景线程:)
编辑:我仍然得到这个答案的投票,即使这是几年,我不再建议使用AsyncTask。这里有许多已知的问题( http ://blog.danlew.net/2014/06/21/the-hidden-pitfalls-of-asynctask/ )。相反,我会敦促你使用Retrofit或其他一些很好的http客户端来处理线程。
I am new to android programming and trying to use webservice in this sample program:
I use Android 4.1 and my IDE is Eclipse Juno. I think the programming part is ok, but may be there is a problem about connecting.
package com.example.webserviceexample;
import java.io.IOException;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.SoapFault;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
final static String NAMESPACE = "http://tempuri.org/";
final static String METHOD_NAME = "CelsiusToFahrenheit";
final static String SOAP_ACTION = "http://tempuri.org/CelsiusToFahrenheit";
final static String URL = "http://www.w3schools.com/webservices/tempconvert.asmx";
TextView sonuc;
EditText deger;
Button hesapla;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
deger = (EditText) findViewById(R.id.deger);
sonuc = (TextView) findViewById(R.id.flag);
hesapla = (Button) findViewById(R.id.hesapla);
hesapla.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//request info
SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME);
Request.addProperty("Celcius",deger.getText().toString());
//envelope
SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
soapEnvelope.dotNet = true; //.NET = true, php = false
//putting request to the envelope
soapEnvelope.setOutputSoapObject(Request);
//transferring data
HttpTransportSE aht = new HttpTransportSE(URL); //prepare
//start
try {
aht.call(SOAP_ACTION, soapEnvelope);
}
catch (IOException e) {
e.printStackTrace();
}
catch (XmlPullParserException e)
{
e.printStackTrace();
}
//waiting and getting response.
String result;
try {
// we are creating SoapPrimitive Object as waiting for simple variable.
result = "Fahrenheit:" + soapEnvelope.getResponse();
//writing the result to the textView
sonuc.setText(result);
}
catch (SoapFault e) {
e.printStackTrace();
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
However, I get this error:
08-15 11:45:26.294: E/AndroidRuntime(641): FATAL EXCEPTION: main
08-15 11:45:26.294: E/AndroidRuntime(641): android.os.NetworkOnMainThreadException
08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
08-15 11:45:26.294: E/AndroidRuntime(641): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
08-15 11:45:26.294: E/AndroidRuntime(641): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
08-15 11:45:26.294: E/AndroidRuntime(641): at java.net.InetAddress.getAllByName(InetAddress.java:214)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
08-15 11:45:26.294: E/AndroidRuntime(641): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
08-15 11:45:26.294: E/AndroidRuntime(641): at org.ksoap2.transport.ServiceConnectionSE.connect(ServiceConnectionSE.java:76)
08-15 11:45:26.294: E/AndroidRuntime(641): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:146)
08-15 11:45:26.294: E/AndroidRuntime(641): at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:95)
08-15 11:45:26.294: E/AndroidRuntime(641): at com.example.webserviceexample.MainActivity$1.onClick(MainActivity.java:61)
08-15 11:45:26.294: E/AndroidRuntime(641): at android.view.View.performClick(View.java:4084)
08-15 11:45:26.294: E/AndroidRuntime(641): at android.view.View$PerformClick.run(View.java:16966)
08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.Handler.handleCallback(Handler.java:615)
08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.Handler.dispatchMessage(Handler.java:92)
08-15 11:45:26.294: E/AndroidRuntime(641): at android.os.Looper.loop(Looper.java:137)
08-15 11:45:26.294: E/AndroidRuntime(641): at android.app.ActivityThread.main(ActivityThread.java:4745)
08-15 11:45:26.294: E/AndroidRuntime(641): at java.lang.reflect.Method.invokeNative(Native Method)
08-15 11:45:26.294: E/AndroidRuntime(641): at java.lang.reflect.Method.invoke(Method.java:511)
08-15 11:45:26.294: E/AndroidRuntime(641): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
08-15 11:45:26.294: E/AndroidRuntime(641): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-15 11:45:26.294: E/AndroidRuntime(641): at dalvik.system.NativeStart.main(Native Method)
So what can be the problem?
You can't do Network operations on the main thread. Checkout : http://developer.android.com/reference/android/os/AsyncTask.html
for painless background threading :)
EDIT: Since I am still getting up-votes for this answer even though it's several years old I would no longer suggest using AsyncTask. It has many known problems which are described here (http://blog.danlew.net/2014/06/21/the-hidden-pitfalls-of-asynctask/). Instead I would urge you to use Retrofit or one of the other nice http clients which handles the threading for you.
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