Android Activity 中菜单的操作

核心提示：R.string.menu_exit).setIcon(R.drawable.icon);//一进来是在选单界面，所以设定其他组别菜单不可见menu.setGroupVisible(MENU_GROUP_GAME, false);menu.setGroupVisible(MENU_GROUP_HELP, false);

R.string.menu_exit).setIcon(R.drawable.icon);

//一进来是在选单界面，所以设定其他组别菜单不可见

menu.setGroupVisible(MENU_GROUP_GAME, false);

menu.setGroupVisible(MENU_GROUP_HELP, false);

return true;

}

//动态修改在这里................

@Override

public boolean onPrepareOptionsMenu(Menu menu)

{

super.onPrepareOptionsMenu(menu);

switch(gameState)

{

case GAME_STATE_MENU:

menu.setGroupVisible(MENU_GROUP_MENU, true);

menu.setGroupVisible(MENU_GROUP_GAME, false);

menu.setGroupVisible(MENU_GROUP_HELP, false);

break;

case GAME_STATE_HELP:

menu.setGroupVisible(MENU_GROUP_MENU, false);

menu.setGroupVisible(MENU_GROUP_GAME, false);

menu.setGroupVisible(MENU_GROUP_HELP, true);

break;

case GAME_STATE_ABOUT:

menu.setGroupVisible(MENU_GROUP_MENU, false);

menu.setGroupVisible(MENU_GROUP_GAME, false);

menu.setGroupVisible(MENU_GROUP_HELP, true);

break;

default:

menu.setGroupVisible(MENU_GROUP_MENU, false);

menu.setGroupVisible(MENU_GROUP_GAME, true);

menu.setGroupVisible(MENU_GROUP_HELP, false);

break;

}

return true;

}

//点击菜单之后的效果

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case MENU_HELP:

//点击帮助菜单

initHelp();

return true;

case MENU_START:

initGame();

return true;

case MENU_ABOUT:

initAbout();

return true;

case MENU_OTHER:

return true;

case MENU_SET:

return true;

}

return false;

}