手把手叫你用android 调研web services

Step by Step Method to Access Webservice from Android

By Mihira Prasanna | 24 Sep 2010

Java Mobile Android

How to access webservice from Android mobile application

Part of The Mobile Zone

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System Requirements

The sections below describe the system and software requirements for developing Android applications using the Android

Supported Operating Systems

• Windows XP (32-bit) or Vista (32- or 64-bit)
• Mac OS X 10.5.8 or later (x86 only)
• Linux (tested on Linux Ubuntu Hardy Heron)

Supported Development Environments

Eclipse IDE

• Eclipse 3.4 (Ganymede) or 3.5 (Galileo)

Caution: There are known issues with the ADT plugin running with Eclipse 3.6. Please stay on 3.5 until further notice.

• Eclipse JDT plugin (included in most Eclipse IDE packages)
• If you need to install or update Eclipse, you can download it from http://www.eclipse.org/downloads/ . Several types of Eclipse packages are available for each platform. For developing Android
• Eclipse IDE for Java EE Developers
• Eclipse IDE for Java Developers
• Eclipse for RCP/Plug-in Developers
• Eclipse Classic (versions 3.5.1 and higher)
• JDK 5 or JDK 6 (JRE alone is not sufficient)
• Android (optional)
• Not compatible with Gnu Compiler for Java (gcj)

Hardware Requirements

The Android

Note that the disk-space requirements above are in addition to those of the Eclipse IDE, JDK, or other prerequisite tools that you may need to install on your development computer.

Installing the ADT Plugin for Eclipse

1. Start Eclipse, then select Help > Install New Software .
2. In the Available Software dialog, click Add... .
3. In the Add Site dialog that appears, enter a name for the remote site (for example, "Android

In the "Location" field, enter this URL:

https://dl-ssl.google.com/android

Note : If you have trouble acquiring the plugin, you can try using "http" in the URL, instead of "https" (https is preferred for security reasons).

Click OK .

1. Back in the Available Software view, you should now see "Developer Tools" added to the list. Select the checkbox next to Developer Tools, which will automatically select the nested tools Android DDMS and Android Development Tools. Click Next .
2. In the resulting Install Details dialog, the Android DDMS and Android Development Tools features are listed. Click Next to read and accept the license agreement and install any dependencies, then click Finish .
3. Restart Eclipse.

Configuring the ADT Plugin

Once you've successfully downloaded ADT as described above, the next step is to modify your ADT preferences in Eclipse to point to the Android

1. Select Window > Preferences... to open the Preferences panel (Mac OS X: Eclipse > Preferences ).
2. Select Android from the left panel.
3. For the SDK Location in the main panel, click Browse... and locate your downloaded SDK directory.

Click Apply , then OK .

Creating an Android

The ADT plugin provides a New Project Wizard that you can use to quickly create a new Android

1. Select File > New > Project .
2. Select Android > Android , and click Next .
3. Select the contents for the project:

• Enter 'Android '. This will be the name of the folder where your project is created.
• Under Contents, select Create new project in workspace . Select your project workspace location.
• Under Target, select an Android target to be used as the project's Build Target. The Build Target specifies which Android platform you'd like your application built against. Unless you know that you'll be using new APIs introduced in the latest SDK, you should select a target with the lowest platform version possible.
  Note: You can change your the Build Target for your project at any time: Right-click the project in the Package Explorer, select Properties , select Android and then check the desired Project Target.
• Under Properties, fill in all necessary fields.

• Enter an Application name as ' Android . This is the human-readable title for your application — the name that will appear on the Android
• Enter a Package name as 'com.test.android '. This is the package namespace (following the same rules as for packages in the Java programming language) where all your source code will reside.
• Select Create Activity (optional, of course, but common) and enter a name (give 'FirstAppUI ') for your main Activity class.
• Enter a Min SDK Version . This is an integer that indicates the minimum API Level required to properly run your application. Entering this here automatically sets the minSdkVersion attribute in the <uses-sdk> of your Android

4. Click Finish .

Tip: You can also start the New Project Wizard from the New icon in the toolbar.

Once you complete the New Project Wizard, ADT creates the following folders and files in your new project:

src/

Includes your stub Activity Java file. All other Java files for your application go here. <Android / (e.g., Android )

Includes the android file that your application will build against. This is determined by the build target that you have chosen in the New Project Wizard.

gen/

This contains the Java files generated by ADT, such as your R.java file and interfaces created from AIDL files.

assets/

This is empty. You can use it to store raw asset files. res/

A folder for your application resources, such as drawable files, layout files, string values, etc. Android

Android default.properties

This file contains project settings, such as the build target. This file is integral to the project, as such, it should be maintained in a Source Revision Control system. It should never be edited manually — to edit project properties, right-click the project folder and select "Properties".

Creating an AVD

An Android

To create an AVD from Eclipse:

1. Select Window > Android , or click the Android
2. In the Virtual Devices panel, you'll see a list of existing AVDs. Click New to create a new AVD.
3. Fill in the details for the AVD. Give it a name, a platform target, an SD card size, and a skin (HVGA is default).
   Note: Be sure to define a target for your AVD that satisfies your application's Build Target (the AVD platform target must have an API Level equal to or greater than the API Level that your application compiles against).
4. Click Create AVD .

Your AVD is now ready and you can either close the SDK and AVD Manager, create more AVDs, or launch an emulator with the AVD by selecting a device and clicking Start .

Code your FirstAppUI.java class like below:

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package
 com.test.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
.widget.ArrayAdapter;
import
 android
.widget.AutoCompleteTextView;

public
 class
 FirstAppUI extends
 Activity {

	
	private
 static
 final
 String NAMESPACE = "
com.service.ServiceImpl"
;
	private
 static
 final
 String URL = 
		"
http://192.168.202.124:9000/Android
WS/wsdl/ServiceImpl.wsdl"
;	
	private
 static
 final
 String SOAP_ACTION = "
ServiceImpl"
;
	private
 static
 final
 String METHOD_NAME = "
message"
;
	
	private
 static
 final
 String[] sampleACTV = new
 String[] {
	"
android
"
, "
iphone"
, "
blackberry"

	};

	@Override
	public
 void
 onCreate(Bundle savedInstanceState) {
		super
.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		ArrayAdapter<String> arrAdapter = new
 ArrayAdapter<String>
		(this
, android
.R.layout.simple_dropdown_item_1line, sampleACTV);

		AutoCompleteTextView ACTV = (AutoCompleteTextView)findViewById
						(R.id.AutoCompleteTextView01);
		ACTV.setAdapter(arrAdapter);

		SoapObject request = new
 SoapObject(NAMESPACE, METHOD_NAME); 		
		SoapSerializationEnvelope envelope = 
			new
 SoapSerializationEnvelope(SoapEnvelope.VER11); 

		envelope.setOutputSoapObject(request);
		HttpTransportSE android
HttpTransport = new
 HttpTransportSE(URL);

		try
 {
			android
HttpTransport.call(SOAP_ACTION, envelope);
			SoapObject resultsRequestSOAP = (SoapObject) envelope.bodyIn;
			ACTV.setHint("
Received :"
 + resultsRequestSOAP.toString());
		} catch
 (Exception e) {
			e.printStackTrace();
		}
	}
}

Insert AutoCompleteTextView to your res>layout >main.xml as:

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<?
xml
 version
="
1.0"
 encoding
="
utf-8"
?
>
  
<
LinearLayout
 android
:id
="
@+id/LinearLayout01"

     android
:layout_width
="
fill_parent"
     
     android
:layout_height
="
fill_parent"
     
     xmlns:android

="
http://schemas.android
.com/apk/res/android
"
>
  

     <
AutoCompleteTextView
     
         android
:id
="
@+id/AutoCompleteTextView01"
         
         android
:layout_width
="
wrap_content"
         
         android
:layout_height
="
wrap_content"
         
         android
:hint
="
This is Hint"
         
         android
:width
="
240px"
 /
>
  

 <
/
LinearLayout
>

Insert Internet access permission to your mobile application in Android file as:

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<?
xml
 version
="
1.0"
 encoding
="
utf-8"
?
>

<
manifest
 xmlns:android

="
http://schemas.android
.com/apk/res/android
"

      package
="
com.test.android
"

      android
:versionCode
="
1"

      android
:versionName
="
1.0"
>

    <
application
 android
:icon
="
@drawable/icon"
 android
:label
="
@string/app_name"
>

        <
activity
 android
:name
="
.FirstAppUI"

                  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
>

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


<
/
manifest
>

ServiceImpl.wsdl :

Collapse | Copy Code

<?
xml
 version
="
1.0"
 encoding
="
UTF-8"
?
>

<
wsdl:definitions
 targetNamespace
=http://service.com
 
	xmlns:apachesoap
=http://xml.apache.org/xml-soap
 
	xmlns:impl
="
http://service.com"
 xmlns:intf
=http://service.com
 
	xmlns:wsdl
=http://schemas.xmlsoap.org/wsdl/
 
	xmlns:wsdlsoap
=http://schemas.xmlsoap.org/wsdl/soap/
 
	xmlns:xsd
="
http://www.w3.org/2001/XMLSchema"
>

<!--
WSDL created by Apache Axis version: 1.4
Built on Apr 22, 2006 (06:55:48 PDT)
-->

 <
wsdl:types
>

  <
schema
 elementFormDefault
="
qualified"
 
      targetNamespace
="
http://service.com"
 xmlns
="
http://www.w3.org/2001/XMLSchema"
>

   <
element
 name
="
message"
>

    <
complexType
/
>

   <
/
element
>

   <
element
 name
="
messageResponse"
>

    <
complexType
>

     <
sequence
>

      <
element
 name
="
messageReturn"
 type
="
xsd:string"
/
>

     <
/
sequence
>

    <
/
complexType
>

   <
/
element
>

  <
/
schema
>

 <
/
wsdl:types
>


   <
wsdl:message
 name
="
messageResponse"
>

      <
wsdl:part
 element
="
impl:messageResponse"
 name
="
parameters"
>

      <
/
wsdl:part
>

   <
/
wsdl:message
>

   <
wsdl:message
 name
="
messageRequest"
>

      <
wsdl:part
 element
="
impl:message"
 name
="
parameters"
>

      <
/
wsdl:part
>

   <
/
wsdl:message
>

   <
wsdl:portType
 name
="
ServiceImpl"
>

      <
wsdl:operation
 name
="
message"
>

         <
wsdl:input
 message
="
impl:messageRequest"
 name
="
messageRequest"
>

       <
/
wsdl:input
>

         <
wsdl:output
 message
="
impl:messageResponse"
 name
="
messageResponse"
>

       <
/
wsdl:output
>

      <
/
wsdl:operation
>

   <
/
wsdl:portType
>

   <
wsdl:binding
 name
="
ServiceImplSoapBinding"
 type
="
impl:ServiceImpl"
>

      <
wsdlsoap:binding
 style
="
document"
 
	transport
="
http://schemas.xmlsoap.org/soap/http"
/
>

      <
wsdl:operation
 name
="
message"
>

         <
wsdlsoap:operation
 soapAction
="
"
/
>

         <
wsdl:input
 name
="
messageRequest"
>

            <
wsdlsoap:body
 use
="
literal"
/
>

         <
/
wsdl:input
>

         <
wsdl:output
 name
="
messageResponse"
>

            <
wsdlsoap:body
 use
="
literal"
/
>

         <
/
wsdl:output
>

      <
/
wsdl:operation
>

   <
/
wsdl:binding
>

   <
wsdl:service
 name
="
ServiceImplService"
>

      <
wsdl:port
 binding
="
impl:ServiceImplSoapBinding"
 name
="
ServiceImpl"
>

         <
wsdlsoap:address
 location
=
		"
http://localhost:9000/Android
WS/services
/ServiceImpl"
/
>

      <
/
wsdl:port
>

   <
/
wsdl:service
>

<
/
wsdl:definitions
>

Thanks!

History

• 24^th September, 2010: Initial post

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)