?? myrms.java
字號:
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.rms.RecordStore;
import com.nokia.mid.ui.FullCanvas;
public class MyRms extends FullCanvas
{
//排行榜畫面
private Image back;
private static Displayable instance;
//創建并得到一個排行榜畫面的對象
synchronized public static Displayable getInstance()
{
if(instance == null)
instance = new MyRms();
return instance;
}
//排行榜畫面的構造方法,加入了2個按鈕
private MyRms()
{
super();
this.setFullScreenMode(true);
back = null;
try
{
back = Image.createImage("/res/back.png");
}
catch(Exception e)
{}
}
protected void paint(Graphics g)
{
//打開數據庫
try
{
GameMIDlet.rs = RecordStore.openRecordStore(GameMIDlet.RecordName,false);
}
catch (Exception e)
{
System.out.println("打開數據庫失敗");
}
GameRMS rd = new GameRMS();
g.setColor(0,0,0);
g.fillRect(0,0,getWidth(),getHeight());
g.setColor(255,255,0);
g.setFont(Font.getFont(Font.FACE_PROPORTIONAL,Font.STYLE_PLAIN,Font.SIZE_SMALL));
g.drawString("排行榜",getWidth()/2-25,10,Graphics.TOP|Graphics.LEFT);
g.drawString("名次 姓名 得分",10,31,Graphics.TOP|Graphics.LEFT);
g.drawString("---------------------------------------",-10,54,Graphics.TOP|Graphics.LEFT);
//使用排行榜數據解碼器,將從數據庫中得到的數據,轉換成玩家姓名和分數
for(int i=1;i<=5;i++)
{
try {
rd.decode(GameMIDlet.rs.getRecord(i));
} catch (Exception e)
{
System.out.println("讀取數據庫失敗");
}
//將得到的玩家姓名和分數在畫面上打印出來
g.drawString(" "+i+" "+rd.name,10,50+i*20,Graphics.TOP|Graphics.LEFT);
g.drawString(" "+rd.score,80,50+i*20,Graphics.TOP|Graphics.LEFT);
}
try {
rd.decode(GameMIDlet.rs.getRecord(10));
} catch (Exception e)
{
System.out.println("讀取數據庫失敗");
}
//關閉數據庫
try
{
GameMIDlet.rs.closeRecordStore();
}catch(Exception e)
{
System.out.println("關閉數據庫失敗");
}
g.drawImage(back,getWidth(),getHeight(),Graphics.BOTTOM|Graphics.RIGHT);
}
protected void keyPressed(int key)
{
if (key == -7)
{
GameMenu.flow("返回");
}
}
}
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