Android 游戏开发 View框架
按键盘的上下键矩形就会上下移动；
通过实例化Handler对象并重写handkeMessage方法实现了一个消息接收器。然后再线程中通过sendMessage方法发送更新界面的消息，接收器收到更新界面的消息时便执行invalidate方法更新屏幕显示。
package com.yarin.android.TestOnView;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class GameView extends View
{
int miCount = 0;
int y = 0;
public GameView(Context context)
{
super(context);
}
public void onDraw(Canvas canvas)
{
if (miCount < 100)
{
miCount++;
}
else
{
miCount = 0;
}
//绘图
Paint mPaint = new Paint();
switch (miCount%4)
{
case 0:
mPaint.setColor(Color.BLUE);
break;
case 1:
mPaint.setColor(Color.GREEN);
break;
case 2:
mPaint.setColor(Color.RED);
break;
case 3:
mPaint.setColor(Color.YELLOW);
break;
default:
mPaint.setColor(Color.WHITE);
break;
}
//绘制矩形
canvas.drawRect((320-80)/2, y, (320-80)/2+80, y+40, mPaint);
}
}
package com.yarin.android.TestOnView;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class GameView extends View
{
int miCount = 0;
int y = 0;
public GameView(Context context)
{
super(context);
}
public void onDraw(Canvas canvas)
{
if (miCount < 100)
{
miCount++;
}
else
{
miCount = 0;
}
//绘图
Paint mPaint = new Paint();
switch (miCount%4)
{
case 0:
mPaint.setColor(Color.BLUE);
break;
case 1:
mPaint.setColor(Color.GREEN);
break;
case 2:
mPaint.setColor(Color.RED);
break;
case 3:
mPaint.setColor(Color.YELLOW);
break;
default:
mPaint.setColor(Color.WHITE);
break;
}
//绘制矩形
canvas.drawRect((320-80)/2, y, (320-80)/2+80, y+40, mPaint);
}
}上面是用来绘制界面的，我们还需要一个类来控制应用的操作
package com.yarin.android.TestOnView;
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 ControlView extends Activity
{
private static final int REFRESH = 0x000001;
private GameView mGameView = null;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
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 GameThread()).start();
}
Handler myHandler = new Handler()
{
//接收到消息后处理
public void handleMessage(Message msg)
{
switch (msg.what)
{
case ControlView.REFRESH:
mGameView.invalidate();
break;
}
super.handleMessage(msg);
}
};
class GameThread implements Runnable
{
public void run()
{
while (!Thread.currentThread().isInterrupted())
{
Message message = new Message();
message.what = ControlView.REFRESH;
//发送消息
Activity01.this.myHandler.sendMessage(message);
try
{
Thread.sleep(100);
}
catch (InterruptedException e)
{
Thread.currentThread().interrupt();
}
}
}
}
//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;
}
}
package com.yarin.android.TestOnView;
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 ControlView extends Activity
{
private static final int REFRESH = 0x000001;
private GameView mGameView = null;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
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 GameThread()).start();
}
Handler myHandler = new Handler()
{
//接收到消息后处理
public void handleMessage(Message msg)
{
switch (msg.what)
{
case ControlView.REFRESH:
mGameView.invalidate();
break;
}
super.handleMessage(msg);
}
};
class GameThread implements Runnable
{
public void run()
{
while (!Thread.currentThread().isInterrupted())
{
Message message = new Message();
message.what = ControlView.REFRESH;
//发送消息
Activity01.this.myHandler.sendMessage(message);
try
{
Thread.sleep(100);
}
catch (InterruptedException e)
{
Thread.currentThread().interrupt();
}
}
}
}
//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;
}
}
补充：移动开发 , Android ,
