只要实现几个方法即可:
boolean onKeyDown(int keyCode,KeyEvent event) ; //按键按下事件
boolean onKeyUp(int keyCode,KeyEvent event) //按键弹起事件
boolean onTouchEvent(MotionEvent event) //触摸屏事件
package exam.apan;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.Toast;
public class KeyTestActivity extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
//按键按下触发的事件
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");
}
return false;
}
//按键弹起触发的事件
public boolean onKeyUp(int keyCode,KeyEvent event)
{
switch(keyCode)
{
case KeyEvent.KEYCODE_DPAD_CENTER:
DisplayToast("弹起:中键");
break;
case KeyEvent.KEYCODE_DPAD_UP:
DisplayToast("弹起:上方向键");
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");
}
return false;
}
//笔触事件
public boolean onTouchEvent(MotionEvent event)
{
int iAction = event.getAction();
if(iAction == MotionEvent.ACTION_CANCEL ||
iAction == MotionEvent.ACTION_DOWN||
iAction == MotionEvent.ACTION_MOVE)
{
return false;
}
//得到笔触的位置
int x = (int)event.getX();
int y = (int)event.getY();
DisplayToast("笔触的坐标:(" + x + "," + y + ")");
return false;
}
//显示Toast
public void DisplayToast(String string)
{
Toast.makeText(KeyTestActivity.this,string,Toast.LENGTH_SHORT).show();
}
}