amazondemo.java

JAVAME Core technology and best practices_mingjava.rar

package org.ksoap2.samples.amazon;

import java.util.Vector;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import org.ksoap2.*;
import org.ksoap2.serialization.*;
import org.ksoap2.transport.*;

/**
 * @author Stefan Haustein
 */

public class AmazonDemo extends MIDlet implements CommandListener, Runnable {
    
    Display display;
    Form mainForm = new Form("Amazon Sample");
    TextField tagField = new TextField("Developer-Tag", "0G7AJ85A74ZDRSP838R2", 64, TextField.ANY);
    TextField symbolField = new TextField("Keyword", "pattern", 64, TextField.ANY);
    StringItem statusItem = new StringItem("Status", "idle");
    
    static Command getCommand = new Command("Get", Command.SCREEN, 1);
    static Command detailCommand = new Command("Details", Command.SCREEN, 1);
    static Command newCommand = new Command("New", Command.SCREEN, 1);
    static Command backCommand = new Command("Back", Command.BACK, 1);
    Vector resultVector;
    List resultList;
    
    public AmazonDemo() {
        mainForm.append(tagField);
        mainForm.append(symbolField);
        mainForm.append(statusItem);
        mainForm.addCommand(getCommand);
        mainForm.setCommandListener(this);
    }
    
    public void startApp() {
        display = Display.getDisplay(this);
        display.setCurrent(mainForm);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }

    public void run(){
        try {
            String symbol = symbolField.getString();
            statusItem.setText("building request");
            SoapObject rpc =
                    new SoapObject("urn:PI/DevCentral/SoapService", "KeywordSearchRequest");
            SoapObject ro = new SoapObject("urn:PI/DevCentral/SoapService", "KeywordRequest");
            
            ro.addProperty("keyword", symbol.trim().toLowerCase());
            ro.addProperty("tag", "webservices-20");
            ro.addProperty("type", "lite");
            ro.addProperty("mode", "book");
            ro.addProperty("page", "1");
            //如果你没有amazon的开发者标示，那么可以用"0G7AJ85A74ZDRSP838R2"
            ro.addProperty("devtag", tagField.getString());
            rpc.addProperty("KeywordSearchRequest", ro);
            SoapSerializationEnvelope envelope =
                    new SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.bodyOut = rpc;
            HttpTransport ht = new HttpTransport("http://soap.amazon.com/onca/soap3");
            ht.debug = true;
            statusItem.setText("submitting request");
            
            try{
                ht.setProxy(false);
                ht.call(null, envelope);
                statusItem.setText("analyzing results...");
                System.err.println(ht.responseDump);
                SoapObject result = (SoapObject) envelope.getResult();
                resultVector = (Vector) result.getProperty("Details"); 
                resultList = new List("Result", List.IMPLICIT);
                resultList.addCommand(newCommand);
                resultList.addCommand(detailCommand);
                resultList.setCommandListener(this);
                
                for(int i = 0; i < resultVector.size(); i++){
                    SoapObject detail = (SoapObject) resultVector.elementAt(i);
                    resultList.append((String) detail.getProperty("ProductName"), null);
                }
                display.setCurrent(resultList);
            } catch (SoapFault f) {
                f.printStackTrace();
                System.err.println(ht.requestDump);
                System.err.println(ht.responseDump);
                statusItem.setText("Error (perhaps keyword not found): "+f.faultstring);
            }  
        } catch (Exception e) {
            e.printStackTrace();
            statusItem.setText("Error: "+ e.toString());
        }
    }
    
    
    public void commandAction(Command c, Displayable d) {
        if(c == getCommand){
            new Thread(this).start();
        } else if(c == newCommand){
            display.setCurrent(mainForm);
            statusItem.setText("idle");
        } else if(c == backCommand){
            display.setCurrent(resultList);
        } else {
            int sel = resultList.getSelectedIndex();
            SoapObject details = (SoapObject) resultVector.elementAt(sel);
            Form detailForm = new Form("Details: "+resultList.getString(sel));
            detailForm.setCommandListener(this);
            detailForm.addCommand(backCommand);
            PropertyInfo pi = new PropertyInfo();
            for(int i = 0; i < details.getPropertyCount(); i++) {
                details.getPropertyInfo(i, null, pi);
                if(pi.name.toLowerCase().indexOf("url")==-1)
                    detailForm.append(new StringItem(pi.name, ""+details.getProperty(i)));
            }
            display.setCurrent(detailForm);
        }
    }
}