Android调用天气预报的WebService简单例子
阶段一:进行主界面布局,如下图:
具体代码如下:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/ba">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/input_city" />
<EditText
android:id="@+id/city"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/search"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/search"/>
<TextView
android:id="@+id/result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
阶段二:导入KSOAP包.
将ksoap2-android-assembly-2.5.2-jar-with-dependencies.jar包拷贝到libs文件夹下,然后点击右键Build Path –> Configure Build Path...,会出现
然后将添加的包勾上...
阶段三:调用天气预报的WebService
1.指定 WebService 的命名空间和调用方法
import org.ksoap2.serialization.SoapObject; private static final String NAMESPACE = "http://WebXml.com.cn/"; private static final String METHOD_NAME = "getWeatherbyCityName"; SoapObject soapObject = new SoapObject(NAMESPACE, METHOD_NAME);
SoapObject类的第一个参数表示WebService的命名空间,可以从WSDL文档中找到WebService的命名空间。
第二个参数表示要调用的WebService方法名。
2、设置调用方法的参数值,如果没有参数,可以省略,设置方法的参数值的代码如下:
rpc.addProperty("theCityName", "济宁");
要注意的是,addProperty方法的第1个参数虽然表示调用方法的参数名,但该参数值并不一定与服务端的WebService类中的方法参数名一致,只要设置参数的顺序一致即可。
3、生成调用Webservice方法的SOAP请求信息。
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11); envelope.bodyOut = soapObject; envelope.dotNet = true; envelope.setOutputSoapObject(soapObject);
创建SoapSerializationEnvelope对象时需要通过SoapSerializationEnvelope类的构造方法设置SOAP协议的版本号。
该版本号需要根据服务端WebService的版本号设置。
在创建SoapSerializationEnvelope对象后,不要忘了设置SOAPSoapSerializationEnvelope类的bodyOut属性,
该属性的值就是在第一步创建的SoapObject对象。
4、创建HttpTransportsSE对象。
这里不要使用 AndroidHttpTransport ht = new AndroidHttpTransport(URL); 这是一个要过期的类
private static String wsdlUrl = "http://www.webxml.com.cn/webservices/weatherwebservice.asmx"; HttpTransportSE ht = new HttpTransportSE(wsdlUrl);
ht.debug = true;
5、使用call方法调用WebService方法
private static String SOAP_ACTION = "http://WebXml.com.cn/getWeatherbyCityName"; ht.call(SOAP_ACTION, envelope);
网上有人说这里的call的第一个参数为null,但是经过我的测试,null是不行的。
第2个参数就是在第3步创建的SoapSerializationEnvelope对象。
6、获得WebService方法的返回结果
有两种方法:
a.使用getResponse方法获得返回数据。
private SoapObject detail;
detail =(SoapObject) envelope.getResponse();
b.使用 bodyIn 及 getProperty。
private SoapObject detail; SoapObject result = (SoapObject)envelope.bodyIn; detail = (SoapObject) result.getProperty("getWeatherbyCityNameResult");
7、 这时候执行会出错,提示没有权限访问网络
需要修改 AndroidManifest.xml 文件,赋予相应权限
简单来说就是增加下面这行配置:<uses-permission android:name="android.permission.INTERNET"></uses-permission>
关于SOAPUtil类的完整代码如下:
package com.lks.weathersearch.soap;
import java.io.IOException;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
public class SOAPUtil {
public static Object doTransport(final String wsdlUrl,
final String webMethod, String city) {
String nameSpace = "http://WebXml.com.cn/";
SoapObject soapObject = new SoapObject(nameSpace, webMethod);
soapObject.addProperty("theCityName", city);
System.out.println("city:"+city);
SoapSerializationEnvelope serializationEnvelope = new SoapSerializationEnvelope(
SoapEnvelope.VER11);
serializationEnvelope.bodyOut = soapObject;
serializationEnvelope.dotNet = true;
serializationEnvelope.setOutputSoapObject(soapObject);
HttpTransportSE httpTransportSE = new HttpTransportSE(wsdlUrl);
String SOAP_ACTION = "http://WebXml.com.cn/" + webMethod;
System.out.println("action:"+SOAP_ACTION);
try {
httpTransportSE.call(SOAP_ACTION, serializationEnvelope);
if (serializationEnvelope.getResponse() != null) {
SoapObject result = (SoapObject) serializationEnvelope.getResponse();
System.out.println(result);
return result;
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
阶段四:编写WeatherActivity,进行相应的事件处理.具体代码如下:
package com.lks.weathersearch.web;
import org.ksoap2.serialization.SoapObject;
import com.lks.weathersearch.soap.SOAPUtil;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.support.v4.app.NavUtils;
import android.text.Editable;
public class WeatherActivity extends Activity {
EditText cityText;
Button searchButton;
TextView resultView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_weather);
cityText = (EditText) this.findViewById(R.id.city);
searchButton = (Button) this.findViewById(R.id.search);
resultView = (TextView) this.findViewById(R.id.result);
searchButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String city = cityText.getText().toString();
String wsdlUrl = "http://www.webxml.com.cn/webservices/weatherwebservice.asmx";
String webMethod = "getWeatherbyCityName";
SoapObject result = (SoapObject) SOAPUtil.doTransport(wsdlUrl, webMethod, city);
resultView.setText(result.getProperty(4).toString()+"\n"+result.getProperty(10).toString());
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_weather, menu);
return true;
}
}
运行结果显示:
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