searchcontroller.java

《j2me开发精解〉（詹健飞）CD-rom附带源码。用netbeans

package com.j2medev.chapter4;

import javax.microedition.lcdui.*;

public class SearchController implements CommandListener{
    
    private SearchMIDlet midlet = null;
    private RMSHandler database = null;
    private Display display = null;
    private InputUI input = new InputUI(this);
    private List result = new List("查询结果",List.IMPLICIT);
    public static final Command backCommand = new Command("返回",Command.BACK,1);
    public static final Command exitCommand = new Command("退出",Command.EXIT,2);
    
    public SearchController(SearchMIDlet midlet) {
        this.midlet = midlet;
        display = Display.getDisplay(midlet);
        database = new RMSHandler();
        input.addCommand(exitCommand);
        input.setCommandListener(this);
        result.addCommand(backCommand);
        result.addCommand(exitCommand);
        result.setCommandListener(this);
        display.setCurrent(input);
    }
    
    public String[] getResult(String query){
        return database.getResult(query);
    }
    
    public void displayResult(String[] queryResult){
        if(queryResult == null){
            queryResult = new String[]{"查询结果为空"};
        }
        result.deleteAll();
        for(int i = 0;i<queryResult.length;i++){
            result.append(queryResult[i],null);
        }
        display.setCurrent(result);
    }
    
    public void commandAction(Command cmd,Displayable displayable){
        if(cmd == backCommand){
            display.setCurrent(input);
        }else if(cmd == exitCommand){
            midlet.exit();
        }
    }
}