android: onKeyDown以及获取屏幕的点的坐标

package com.lay1;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class LayoutDemo1Activity extends Activity
{
private Button button;

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(listener);
}

OnClickListener listener = new OnClickListener()
{
@Override
public void onClick(View v)
{
DisplayToast("点击了OK！");
}
};

public boolean onKeyDown(int keyCode, KeyEvent event)
{
switch (keyCode)
{
case KeyEvent.KEYCODE_BACK:
DisplayToast("弹起：返回键");
break;
case KeyEvent.KEYCODE_DPAD_CENTER:
DisplayToast("按下：中间键");
break;
case KeyEvent.KEYCODE_DPAD_UP:
DisplayToast("按下：向上键");
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
DisplayToast("按下：向下键");
break;
case KeyEvent.KEYCODE_DPAD_LEFT:
DisplayToast("按下：左方向键");
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
DisplayToast("按下：有方向键");
break;
default:
break;
}
//return super.onKeyDown(keyCode, event);
return false;
}

/* public boolean onKeyUp(int keyCode, KeyEvent event)
{
switch (keyCode)
{

case KeyEvent.KEYCODE_DPAD_CENTER:
DisplayToast("弹起：中间键");
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
DisplayToast("弹起：向下键");
break;
case KeyEvent.KEYCODE_DPAD_LEFT:
DisplayToast("弹起：向左键");
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
DisplayToast("弹起：向右键");
break;
case KeyEvent.KEYCODE_DPAD_UP:
DisplayToast("弹起：向上键");
break;
}
return super.onKeyDown(keyCode, event);
}*/

public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)
{
return super.onKeyMultiple(keyCode, repeatCount, event);
}

public boolean onTouchEvent(MotionEvent event)
{
int iAction = event.getAction();
if (iAction == MotionEvent.ACTION_CANCEL || iAction == MotionEvent.ACTION_DOWN
|| iAction == MotionEvent.ACTION_MOVE)
{
return false;
}
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);
}
public void DisplayToast(String str)
{
Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
}
}