b1.setOnCheckedChangeListener(new?CompoundButton.OnCheckedChangeListener()?{ ????@Override ????public?void?onCheckedChanged(CompoundButton?compoundButton,?boolean?b)?{ ????????Log.i("msg0",?b+"?"); ????????if(b)?{ ????????????String?text?=?b1.getText().toString(); ????????????Log.i("msg",?text); ????????} ????} });b1.setOnCheckedChangeListener(new?CompoundButton.OnCheckedChangeListener()?{ ????@Override ????public?void?onCheckedChanged(CompoundButton?compoundButton,?boolean?b)?{ ????????Log.i("msg0",?b); ????????if(b)?{ ????????????String?text?=?b1.getText().toString(); ????????????Log.i("msg",?text); ????????} ????} });上下有段代碼有一處不同（第四行的b），為什么上面的可行，下面不可行。