实例2---获得按键值

《手机游戏50例》第二个实例为将按键值显示在屏幕上,下面给出MainView.java的代码

package com.wjh.demon_2;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
import android.inputmethodservice.Keyboard.Key;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;

public class MainView extends View implements Runnable{
	private boolean  m_bRunning = false;
	public int m_nKeyCode;
	public String m_nKeyAction="";
	private Handler handler = null;
	public MainView(Context context) {
		super(context);
		// TODO Auto-generated constructor stub
		setFocusable(true);
		start();
	}
	public void start()
	{
		m_bRunning = true;
		//更新
		handler = new Handler(){

			@Override
			public void handleMessage(Message msg) {
				// TODO Auto-generated method stub
				super.handleMessage(msg);
				MainView.this.invalidate();
			}
			
		};
		Thread thread = new Thread(this);
		thread.start();
	}
	//线程启用方法
	public void run()
	{
		while(m_bRunning)
		{
				//重回图形
				handler.sendEmptyMessage(0);
				try {
					Thread.sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
		}
	}
	public void stop()
	{
		m_bRunning = false;
	}
	//画图方法
	@Override
	protected void onDraw(Canvas canvas) {
		// TODO Auto-generated method stub
		super.onDraw(canvas);
		//设置背景颜色
	
		Paint backGround = new Paint();
		backGround.setColor(Color.BLACK);
		//清屏
		canvas.drawRect(0, 0, getWidth(), getHeight(), backGround);
		//设置画笔颜色
		Paint cPaint = new Paint();
		cPaint.setColor(Color.BLUE);
		cPaint.setTextSize(20);
		//输出按键的设备码
		canvas.drawText("KeyCode:", 10, 20,cPaint);
		canvas.drawText(""+m_nKeyCode,120,20,cPaint);
		//输出按键的设备名
		canvas.drawText("KeyAction:", 10, 80, cPaint);
		canvas.drawText(m_nKeyAction, 120, 80, cPaint);
		
		
		
	}
	//获得按键输入
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		// TODO Auto-generated method stub
		m_nKeyCode = keyCode;
		switch(keyCode)
		{
		case KeyEvent.KEYCODE_DPAD_UP:
			m_nKeyAction = "UP";
			break;
		case KeyEvent.KEYCODE_DPAD_DOWN:
			m_nKeyAction = "DOWN";
			break;
		case KeyEvent.KEYCODE_DPAD_LEFT:
			m_nKeyAction = "LEFT";
			break;
		case KeyEvent.KEYCODE_DPAD_RIGHT:
			m_nKeyAction = "RIGHT";
			break;
		case KeyEvent.KEYCODE_DPAD_CENTER:
			m_nKeyAction = "CENTER";
			break;		
		default:
			m_nKeyAction="NONE";
			break;
		}
		return super.onKeyDown(keyCode, event);
	}
	
	
	

}

 代码包：Demon_2.rar

评论

2 楼 一口三个汉堡 2011-05-31  

zhang247124629 写道

适合新手..

因为我就是新手

1 楼 zhang247124629 2011-05-31  

适合新手..