//按键按下，所触发的事件

public boolean onKeyDown(intkeyCode, KeyEvent event) {switch(keyCode) {caseKeyEvent.KEYCODE_DPAD_CENTER:

display("中键被按下");break;caseKeyEvent.KEYCODE_DPAD_DOWN:

display("下键被按下");break;caseKeyEvent.KEYCODE_DPAD_LEFT:

display("左键被按下");break;caseKeyEvent.KEYCODE_DPAD_RIGHT:

display("右键被按下");break;caseKeyEvent.KEYCODE_DPAD_UP:

display("上键被按下");break;

}return super.onKeyDown(keyCode, event);

}//按键弹起，所触发的事件

public boolean onKeyUp(intkeyCode, KeyEvent event) {switch(keyCode) {caseKeyEvent.KEYCODE_DPAD_CENTER:

display("中键被弹起");break;caseKeyEvent.KEYCODE_DPAD_DOWN:

display("下键被弹起");break;caseKeyEvent.KEYCODE_DPAD_LEFT:

display("左键被弹起");break;caseKeyEvent.KEYCODE_DPAD_RIGHT:

display("右键被弹起");break;caseKeyEvent.KEYCODE_DPAD_UP:

display("上键被弹起");break;

}return super.onKeyUp(keyCode, event);

}

// 按键按下，所触发的事件

public boolean onKeyDown(int keyCode, KeyEvent event) {

switch (keyCode) {

case KeyEvent.KEYCODE_DPAD_CENTER:

display("中键被按下");

break;

case KeyEvent.KEYCODE_DPAD_DOWN:

display("下键被按下");

break;

case KeyEvent.KEYCODE_DPAD_LEFT:

display("左键被按下");

break;

case KeyEvent.KEYCODE_DPAD_RIGHT:

display("右键被按下");

break;

case KeyEvent.KEYCODE_DPAD_UP:

display("上键被按下");

break;

}

return super.onKeyDown(keyCode, event);

}

// 按键弹起，所触发的事件

public boolean onKeyUp(int keyCode, KeyEvent event) {

switch (keyCode) {

case KeyEvent.KEYCODE_DPAD_CENTER:

display("中键被弹起");

break;

case KeyEvent.KEYCODE_DPAD_DOWN:

display("下键被弹起");

break;

case KeyEvent.KEYCODE_DPAD_LEFT:

display("左键被弹起");

break;

case KeyEvent.KEYCODE_DPAD_RIGHT:

display("右键被弹起");

break;

case KeyEvent.KEYCODE_DPAD_UP:

display("上键被弹起");

break;

}

return super.onKeyUp(keyCode, event);

}

原文：http://www.cnblogs.com/wjhblogs/p/4757300.html