Android单选按钮

Question

I have a radio button group in Android which looks something like:

Choose Color:

• Red
• Blue
• Orange
• Green

I need to get selected radio button and also its value.

I have 4 radiobuttons in this manner within radiogroup rg

rb1a=(RadioButton)findViewById(R.id.rb1a);
rb1b=(RadioButton)findViewById(R.id.rb1b);
rb1c=(RadioButton)findViewById(R.id.rb1c);
rb1d=(RadioButton)findViewById(R.id.rb1d);
tv1=(TextView)findViewById(R.id.tv1);
next1=(Button)findViewById(R.id.next1);
rg=(RadioGroup)findViewById(R.id.rg);

// I have error after this line.please help
rg.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
    public void onCheckedChanged(RadioGroup group, int checkedId)
    {

    }

    @Override
    public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
        // TODO Auto-generated method stub

    }
});

Answer 1

您可以使用该isChecked()功能测试radion按钮.

对于前:

if(radio1_red.isChecked())
{
       txtView.setText("Red button is checked");
}

看看这个例子.

你也可以参考这个页面 -在android-sdk页面中给出的Form Stuff.

这样做是为了获取选定的单选按钮及其值:

 private OnClickListener radio_listener = new OnClickListener() {
    public void onClick(View v) {
        // Perform action on clicks
        RadioButton rb = (RadioButton) v;
        Toast.makeText(HelloFormStuff.this, rb.getText(), Toast.LENGTH_SHORT).show();
    }
};