两种小提示信看

第一种:?????Toast.makeText(Calculator.this,?"The?buttonface?was?1.",?Toast.LENGTH_SHORT).show();????第二种?????private?void?openOptionsDialog()?{???????new?AlertDialog.Builder(this)???????.setTitle("weight?/?(height?*?height)?is?:"?+?BMI)???????.setMessage("Android?BMI?Calc")???????.show();???}???????openOptionsDialog();?