gameviewactivity.java

Android游戏开发入门

package com.bgstudy.app.game.view;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.KeyEvent;
import android.view.MotionEvent;

public class GameViewActivity extends Activity
{
	private static final int	REFRESH		= 0x000001;
	
	/* 声明GameView类对象 */
	private GameView			mGameView	= null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);

		/* 实例化GameView对象 */
		this.mGameView = new GameView(this);

		// 设置显示为我们自定义的View(GameView)
		setContentView(mGameView);

		// 开启线程
		new Thread(new GameThread1()).start();
	}

	Handler	myHandler	= new Handler() 
	{
		//接收到消息后处理
		public void handleMessage(Message msg)
		{
			switch (msg.what)
			{
			case GameViewActivity.REFRESH:
				mGameView.invalidate();
				break;
			}
			super.handleMessage(msg);
		}			
	};

	class GameThread implements Runnable
	{
		public void run()
		{
			while (!Thread.currentThread().isInterrupted())
			{
				Message message = new Message();
				message.what = GameViewActivity.REFRESH;
				//发送消息
				GameViewActivity.this.myHandler.sendMessage(message);
				try
				{
					Thread.sleep(100);
				}
				catch (InterruptedException e)
				{
					Thread.currentThread().interrupt();
				}
			}
		}
	}
	/**
	 * 当然可以将GameThread类这样写
	 * 同样可以更新界面，并且不在需要
	 * Handler在接受消息
	 * */
	class GameThread1 implements Runnable
	{
		public void run()
		{
			while (!Thread.currentThread().isInterrupted())
			{
				try
				{
					Thread.sleep(100);
				}
				catch (InterruptedException e)
				{
					Thread.currentThread().interrupt();
				}
				//使用postInvalidate可以直接在线程中更新界面
				mGameView.postInvalidate();
			}
		}
	}
	
	
	//详细事件处理见第三章
	//当然这些事件也可以写在GameView中
	//触笔事件
	public boolean onTouchEvent(MotionEvent event)
	{
		return true;
	}
	
	//按键按下事件
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
    	return true;
    }
    
	//按键弹起事件
	public boolean onKeyUp(int keyCode, KeyEvent event)
	{
		switch (keyCode)
		{
		//上方向键
		case KeyEvent.KEYCODE_DPAD_UP:
			mGameView.y-=3;
			break;
		//下方向键
		case KeyEvent.KEYCODE_DPAD_DOWN:
			mGameView.y+=3;
			break;
		}
		return false;
	}
	
	public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)
	{
		return true;
	}
}