java - 如何检查选择了哪个单选按钮？

Question

我在一个单选组中有三个单选按钮。我怎样才能告诉 Java 根据选择的按钮做不同的事情？我声明了组和所有按钮:

final RadioGroup size = (RadioGroup)findViewById(R.id.RGSize);
        final RadioButton small = (RadioButton)findViewById(R.id.RBS);
        final RadioButton medium = (RadioButton)findViewById(R.id.RBM);
        final RadioButton large = (RadioButton)findViewById(R.id.RBL);

我知道我会这样说:

if (size.getCheckedRadioButtonId().equals(small){

} else{

}

但是 equals 不是正确的语法...我如何询问 java 选择了哪个按钮？

Answer 1

尝试:

if (size.getCheckedRadioButtonId() == small.getId()){
 ....
}
else if(size.getCheckedRadioButtonId() == medium.getId()){
 ....
}