Android游戏开发之处理按键的响应方式源码

package cn.m15.xys; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.view.Window; import android.view.WindowManager; public class SurfaceViewAcitvity extends Activity { AnimView mAnimView = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 全屏显示窗口 requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // 显示自定义的游戏View mAnimView = new AnimView(this); setContentView(mAnimView); } public class AnimView extends View { String mKeyDownEvent = "点击键盘方向键"; String mKeyDownTime = ""; String mKeyUpEvent = ""; String mKeyUpTime = ""; Paint mPaint = null; /** * 构造方法 * * @param context */ public AnimView(Context context) { super(context); mPaint = new Paint(); /**设置控制焦点 **/ setFocusable(true); } @Override protected void onDraw(Canvas canvas) { /**显示内容**/ mPaint.setColor(Color.WHITE); canvas.drawText(mKeyDownEvent, 100, 20, mPaint); canvas.drawText(mKeyDownTime, 100, 40, mPaint); canvas.drawText(mKeyUpEvent, 100, 60, mPaint); canvas.drawText(mKeyUpTime, 100, 80, mPaint); super.onDraw(canvas); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_DPAD_UP: mKeyDownEvent = "按下了上键"; break; case KeyEvent.KEYCODE_DPAD_DOWN: mKeyDownEvent = "按下了下键"; break; case KeyEvent.KEYCODE_DPAD_LEFT: mKeyDownEvent = "按下了左键"; break; case KeyEvent.KEYCODE_DPAD_RIGHT: mKeyDownEvent = "按下了右键"; break; case KeyEvent.KEYCODE_DPAD_CENTER: mKeyDownEvent = "按下了中键"; break; case KeyEvent.KEYCODE_1: mKeyDownEvent = "按下了数字键1"; break; case KeyEvent.KEYCODE_3: mKeyDownEvent = "按下了数字键2"; break; case KeyEvent.KEYCODE_7: mKeyDownEvent = "按下了数字键7"; break; default: mKeyDownEvent = String.valueOf(keyCode); break; } mKeyDownTime = "触发当前事件的时间为" + event.getEventTime(); /**通知UI线程重绘**/ postInvalidate(); return super.onKeyDown(keyCode, event); } @Override public boolean onKeyUp(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_DPAD_UP: mKeyUpEvent = "抬起了上键"; break; case KeyEvent.KEYCODE_DPAD_DOWN: mKeyUpEvent = "抬起了下键"; break; case KeyEvent.KEYCODE_DPAD_LEFT: mKeyUpEvent = "抬起了左键"; break; case KeyEvent.KEYCODE_DPAD_RIGHT: mKeyUpEvent = "抬起了右键"; break; case KeyEvent.KEYCODE_DPAD_CENTER: mKeyUpEvent = "抬起了中键"; break; case KeyEvent.KEYCODE_1: mKeyUpEvent = "抬起了数字键1"; break; case KeyEvent.KEYCODE_3: mKeyUpEvent = "抬起了数字键2"; break; case KeyEvent.KEYCODE_7: mKeyUpEvent = "抬起了数字键7"; break; default: mKeyUpEvent = String.valueOf(keyCode); break; } mKeyUpTime = "触发当前事件的时间为" + event.getEventTime(); /**通知UI线程重绘**/ postInvalidate(); return super.onKeyUp(keyCode, event); } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { return super.onKeyDown(keyCode, event); } }