按键事件处理

/**
* 控制事件通过设置其空间的监听器来监听并处理事件 按键按下事件：通过重写onKeyDown方法 按键弹起事件：通过重写onKeyUp方法
* 触笔点击事件：通过实现onTouchEvent方法
*
* @author chen_xhua
*
*/
public class KeyActivity extends Activity {
// private static final String TAG = "KeyActivity";
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_key);
// 获得button对象
Button button_ok = (Button) findViewById(R.id.button_ok);
// 设置Button控件监听器
button_ok.setOnClickListener(new Button.OnClickListener() {
public void onClick(View arg0) {
// 这里处理事件
DisplayToast("点击了OK按钮");
}
});
}

// 按键按下所触发的事件
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
DisplayToast("按下：中键");
break;
case KeyEvent.KEYCODE_DPAD_UP:
DisplayToast("按下：上方向键");
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
DisplayToast("按下：下方向键");
break;
case KeyEvent.KEYCODE_DPAD_LEFT:
DisplayToast("按下：左方向键");
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
DisplayToast("按下：右方向键 ");
break;
}
return super.onKeyDown(keyCode, event);
}

// 按键抬起所触发的事件：
public boolean onKeyUp(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
DisplayToast("弹起：中键");
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
DisplayToast("弹起：下方向键");
break;
case KeyEvent.KEYCODE_DPAD_LEFT:
DisplayToast("弹起：左方向键");
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
DisplayToast("弹起：右方向键");
break;
case KeyEvent.KEYCODE_DPAD_UP:
DisplayToast("弹起：上方向键");
break;
}
return super.onKeyUp(keyCode, event);
}

// 多次按下触发事件
public boolean onKeyMutiple(int keyCode, int repeatCount, KeyEvent event) {
return super.onKeyMultiple(keyCode, repeatCount, event);
}

// 触笔事件
public boolean onTouchEvent(MotionEvent event) {
int iAction = event.getAction();
if (iAction == MotionEvent.ACTION_CANCEL
|| iAction == MotionEvent.ACTION_DOWN
|| iAction == MotionEvent.ACTION_MOVE) {
return false;
}
// 得到触笔点击的位置
int x = (int) event.getX();
int y = (int) event.getY();
DisplayToast("触笔点击坐标：（" + Integer.toString(x) + ","
+ Integer.toString(y) + ")");
return super.onTouchEvent(event);

}

// 显示Toast
public void DisplayToast(String str) {
Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
}

}