按键事件

package com.vanceinfo.KeyEvent;

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 KeyEventActivity extends Activity
{
    private Button button;

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

    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();
    }
}

 

效果图