midp1eventstand_canvas.java

MIDP1.0标准按键测试 MIDP1.0标准按键测试 MIDP1.0标准按键测试 MIDP1.0标准按键测试

/*
 *MIDP1.0标准按键测试
 *MIDP1EventStand_Canvas.java
 *Editer:Jinlong He
 *Date:2008-01-24
 */
 import javax.microedition.lcdui.*;
 public class MIDP1EventStand_Canvas extends Canvas{
 	private int width;		//mobile screen width
 	private int height;		//mobile screen height
 	
 	String text = "MIDP1.0标准按键测试";
 	
 	/*
 	 *1.构造
 	 *
 	 */
 	MIDP1EventStand_Canvas(){
 		width = this.getWidth();
 		height = this.getHeight();
 		
 		repaint();
 		
 	}
 	
 	/*
 	 *2.实现paint()方法
 	 *
 	 */
 	protected void paint(Graphics g){
 		g.setColor(0,0,255);
 		g.fillRect(0,0,width,height);
 		g.setColor(255,255,255);
 		g.drawString(text,0,height/2,Graphics.LEFT | Graphics.TOP);	//写字符四个参数：字符串、始宽、始高、格式
 		
 	}
 	
 	/*
 	 *3.响应按键事件
 	 *
 	 */
 	protected void keyPressed(int keyCode){
 		text = "您点击了数字按键: ";
 		switch(keyCode){
 			case KEY_NUM0:
 				text+="0";
 				break;
 			case KEY_NUM1:
 				text+="1";
 				break;
 			case KEY_NUM2:
 				text+="2";
 				break;
 			case KEY_NUM3:
 				text+="3";
 				break;
 			case KEY_NUM4:
 				text+="4";
 				break;
 			case KEY_NUM5:
 				text+="5";
 				break;
 			case KEY_NUM6:
 				text+="6";
 				break;
 			case KEY_NUM7:
 				text+="7";
 				break;
 			case KEY_NUM8:
 				text+="8";
 				break;
 			case KEY_NUM9:
 				text+="9";
 				break;
 			case KEY_STAR:
 				text+="*";
 				break;
 			case KEY_POUND:
 				text+="#";
 				break; 			
 		}	
 		repaint();
 	}
 	
 }