settings.java

是sun公司做的开源项目

package org.bubblebreaker.config;

import org.bubblebreaker.model.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;

public class Settings
{
	public static int ballsType=Ball.IMAGE;
	public static int level = 0;
	public static int modelBuilder = Model.RANDOM_BUILDER;
	public static int musicStateOnOrOff=1;
	public static boolean isMusicOff(){
		return musicStateOnOrOff == 1;
	}
	public static void setBallsType(int type)
	{
		ballsType=type;
		Ball.createBalls(type);
	}
	public static int getBallsType()
	{
		return ballsType;
	}
	public static int getModelBuilder()
	{
		return modelBuilder;
	}
	public static int getLevel()
	{
		return level;
	}
	public static Form getSettingsForm()
	{
		ChoiceGroup cgroup=new ChoiceGroup(
				"Ball type",
				ChoiceGroup.EXCLUSIVE,
				new String[]{
					"2D",
			    		"Solid",
			    		"Glass"
				},
				null
			    );
		cgroup.setSelectedIndex(ballsType,true);//select the existing
		ChoiceGroup cgroup1=new ChoiceGroup(
				"Board type",
				ChoiceGroup.EXCLUSIVE,
				new String[]{
					"Random",
			    		"Square"
				},
			null);
		cgroup1.setSelectedIndex(0,true);//select the existing
		ChoiceGroup cgroup2=new ChoiceGroup(
				"Music",
				ChoiceGroup.EXCLUSIVE,
				new String[]{
					"On",
			    		"Off"
				},
			null);
		cgroup2.setSelectedIndex(musicStateOnOrOff,true);
		Item[] levelItem = {
			new Gauge("Level", true, 5, level),
			cgroup,
			cgroup1,
			cgroup2

		};
		Form f = new Form("Settings", levelItem);
		return f;
	}
	public static void applySettingsForm(Form f)
	{
		Gauge g = (Gauge)f.get(0);
		level=g.getValue();//TODO : set it in canvas
		ChoiceGroup cgroup=(ChoiceGroup)f.get(1);
		int index=cgroup.getSelectedIndex();
		switch(index)
		{
			case 1:
				setBallsType(Ball.IMAGE);
				break;
			case 2:
				setBallsType(Ball.IMAGE_GLASS);
				break;
			case 0:
			default:
				setBallsType(Ball.DRAW2D);
				break;
		}
		cgroup=(ChoiceGroup)f.get(2);
		index=cgroup.getSelectedIndex();
		switch(index)
		{
			case 0:
				modelBuilder=Model.RANDOM_BUILDER;
				break;
			case 1:
				modelBuilder=Model.SQUARE_BUILDER;
				break;
		}
		cgroup=(ChoiceGroup)f.get(3);
		musicStateOnOrOff = cgroup.getSelectedIndex();
		writeToRecordStore();
	}
	public static void readFromRecordStore()
	{
		try
		{
			RecordStore store=RecordStore.openRecordStore("Bubble Breaker", true);
			int size=store.getNumRecords();
			for(int i=0;i<size;i++)
			{
				byte data[]=store.getRecord(i);
				String str=new String(data);
				if(str.startsWith("balls type:")){
					ballsType=Integer.parseInt(str.substring(10));
				}else if(str.startsWith("level:")){
					level=Integer.parseInt(str.substring(5));
				}else if(str.startsWith("modelBuilder:")){
					modelBuilder=Integer.parseInt(str.substring(12));
				}else if(str.startsWith("music:")){
					musicStateOnOrOff=Integer.parseInt(str.substring(5));
				}
			}
			store.closeRecordStore();
		}catch(Exception e)
		{
			System.out.println(e);
			e.printStackTrace();
		}
	}
	private static void writeToRecordStore()
	{
		try
		{
			RecordStore.deleteRecordStore("Bubble Breaker");
			RecordStore store=RecordStore.openRecordStore("Bubble Breaker", true);
			addRecord("balls type:"+ ballsType, store);
			addRecord("level:"+ level, store);
			addRecord("modelBuilder:"+ modelBuilder, store);
			addRecord("music:"+ musicStateOnOrOff, store);
			store.closeRecordStore();
		}catch(Exception e)
		{
			System.out.println(e);
			e.printStackTrace();
		}
	}
	private static void addRecord(String str, RecordStore store) throws Exception
	{
		byte []data=str.getBytes();
		store.addRecord(data,0,data.length);
	}
}