[代码] Activity01.java
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package com.yarin.android.Examples_05_01;
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import android.app.Activity;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.view.KeyEvent;
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import android.view.MotionEvent;
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public class Activity01 extends Activity
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{
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private static final int REFRESH= 0x000001;
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/** 声明GameView类对象 */
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private GameViewmGameView = null;
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/** Called when the activity is first created. */
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@Override
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public void onCreate(Bundle savedInstanceState)
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{
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super.onCreate(savedInstanceState);
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/** 实例化GameView对象 */
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this.mGameView = new GameView(this);
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// 设置显示为我们自定义的View(GameView)
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setContentView(mGameView);
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// 开启线程
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new Thread(new GameThread()).start();
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}
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// Handler myHandler = new Handler()
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// {
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////接收到消息后处理
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//public void handleMessage(Message msg)
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//{ switch (msg.what)
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//{
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//case Activity01.REFRESH:
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//mGameView.invalidate();
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//break;}
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//super.handleMessage(msg);
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//}
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// };
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//
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// class GameThread implements Runnable
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// { public void run()
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//{while (!Thread.currentThread().isInterrupted())
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//{ Message message = new Message();
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//message.what = Activity01.REFRESH;
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////发送消息
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//Activity01.this.myHandler.sendMessage(message);
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//try
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//{Thread.sleep(100);
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//}
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//catch (InterruptedException e)
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//{Thread.currentThread().interrupt();
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//}
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//}
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//}
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// }
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// **
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//* 当然可以将GameThread类这样写
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//* 同样可以更新界面，并且不在需要
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//* Handler在接受消息
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class GameThread implements Runnable
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{
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public void run()
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{
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while (!Thread.currentThread().isInterrupted())
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{
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try
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{
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Thread.sleep(100);
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}
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catch (InterruptedException e)
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{
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Thread.currentThread().interrupt();
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}
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//使用postInvalidate可以直接在线程中更新界面
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mGameView.postInvalidate();
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//如果用invalidate()则会出错
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//mGameView.invalidate();
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//FATAL EXCEPTION: Thread-8
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//android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
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//at android.view.ViewRoot.checkThread(ViewRoot.java:2802)
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//at android.view.ViewRoot.invalidateChild(ViewRoot.java:607)
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//at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:633)
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//at android.view.ViewGroup.invalidateChild(ViewGroup.java:2505)
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//at android.view.View.invalidate(View.java:5139)
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//at com.yarin.android.Examples_05_01.Activity01$GameThread.run(Activity01.java:81)
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//at java.lang.Thread.run(Thread.java:1096)
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//查看View源文件
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//public void postInvalidate(int left, int top, int right, int bottom) {
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//postInvalidateDelayed(0, left, top, right, bottom);
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//}
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//
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//public void postInvalidateDelayed(long delayMilliseconds) {
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//// We try only with the AttachInfo because there's no point in invalidating
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//// if we are not attached to our window
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//if (mAttachInfo != null) {
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//Message msg = Message.obtain();
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//msg.what = AttachInfo.INVALIDATE_MSG;
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//msg.obj = this;
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//mAttachInfo.mHandler.sendMessageDelayed(msg, delayMilliseconds);
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//}
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}
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}
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}
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//详细事件处理见第三章
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//当然这些事件也可以写在GameView中
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//触笔事件
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public boolean onTouchEvent(MotionEvent event)
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{
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return true;
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}
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//按键按下事件
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public boolean onKeyDown(int keyCode, KeyEvent event)
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{
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return true;
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}
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//按键弹起事件
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public boolean onKeyUp(int keyCode, KeyEvent event)
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{
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switch (keyCode)
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{
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//上方向键
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case KeyEvent.KEYCODE_DPAD_UP:
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mGameView.y-=3;
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break;
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//下方向键
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case KeyEvent.KEYCODE_DPAD_DOWN:
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mGameView.y+=3;
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break;
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}
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return false;
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}
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public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)
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{
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return true;
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}
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}
