midlet9.java

实现发短信窗口

package Prjw;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;


public class MIDlet9 extends MIDlet implements CommandListener{
	
	private TextBox tbx=new TextBox("请输入短信","",255,TextField.ANY);//可以numeric试试效果
	private Display dis;
	private Alert alt1=null;
	private Command cmdDel = new Command("删除文本",Command.SCREEN,1);
	
	public MIDlet9(){
		Image img=null;
		try{
			img=Image.createImage("/img.png");
		}catch(Exception ex){
			ex.printStackTrace();
		}
		alt1=new Alert("提示","有短信是否阅读",img,AlertType.INFO);
	}
	
	
	//private Alert alt1=new Alert("提示","有短信是否阅读",img,AlertType.INFO);
	
	protected void startApp() throws MIDletStateChangeException {
		
		dis=Display.getDisplay(this);
		//dis.setCurrent(alt1,tbx);//消失之后到达tbx
		
		alt1.setTimeout(Alert.FOREVER);
		//alt1.setTimeout(5000);
		dis.setCurrent(alt1,tbx);
		
		tbx.addCommand(cmdDel);
		tbx.setTicker(new Ticker("欢迎参加本公司的活动"));
		tbx.setCommandListener(this);
	}
//看效果，可以删除，用键盘上面的backspace

	public void commandAction(Command c, Displayable d){
		if(c==cmdDel){
			//删除光标前的字符
			int position =tbx.getCaretPosition();
			tbx.delete(position-1, 1);
			//到最前面就会抛出异常
		}
	}
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

	protected void pauseApp() {
		// TODO Auto-generated method stub

	}

	
}