显示无线电组中单选按钮的选择值

Question

我有一个单选按钮组，有四个单选按钮。我正在尝试创建一个场景，当用户点击单选按钮时，该单选按钮的值将显示给他。但我的代码无效。

这是我的单选按钮组，调用onclick侦听器

buttongroup.setOnClickListener(buttongroupListener);

上面的行放在onCreate View中。

private OnClickListener buttongroupListener = new OnClickListener(){

@Override
public void onClick(View view) {
    // TODO Auto-generated method stub
    String selectedValue = "";
    // Is the button now checked?

  if(view.getId() == R.id.buttoncontainer){
    boolean checked = ((RadioButton) view).isChecked();
    int selectedRadioID = buttongroup.getCheckedRadioButtonId();

    if(checked){

        switch(selectedRadioID){

            case R.id.radioButton1:
                selectedValue = "A";
                break;
            case R.id.radioButton2:
                selectedValue = "B";
                break;
            case R.id.radioButton3:
                selectedValue = "C";
                break;
            case R.id.radioButton4:
                selectedValue = "D";
                break;
        }
    }
 }



    Toast.makeText(context, selectedValue,Toast.LENGTH_SHORT).show();
}

};

Answer 1

我建议的更好的选择是使用RadioGroup事件如下：

 RadioGroup radioGroup = (RadioGroup) findViewById(R.id.yourRadioGroup);        
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() 
{
    public void onCheckedChanged(RadioGroup group, int checkedId) {
       switch(checkedId){

        case R.id.radioButton1:
            selectedValue = "A";
            break;
        case R.id.radioButton2:
            selectedValue = "B";
            break;
        case R.id.radioButton3:
            selectedValue = "C";
            break;
        case R.id.radioButton4:
            selectedValue = "D";
            break;
    }
    }Toast.makeText(context, selectedValue,Toast.LENGTH_SHORT).show();

});