Radio Button style programmatically

Question

I would to create a number of radio button dinamically in a fragment, I only have problem with style. If I put radiobutton code in the xml file, default style is applied correctly, but when I create radiobutton through a function I see different style!

XML

<RadioGroup
            android:id="@+id/radiogroup"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:orientation="vertical"
            android:animationCache="false">

            <RadioButton
                android:text="RadioButton 1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/radioButton3" />

            <RadioButton
                android:text="RadioButton 2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/radioButton4" />


</RadioGroup>

RESULT

JAVA CODE

This code is put in onCreateView in the fragment

public void addRadioButton(Context ctx,int num){

    RadioGroup radioGroup= (RadioGroup) alertInflatedView.findViewById(R.id.radiogroup);

    for (int i = 1; i <= num; i++) {
        RadioButton radioButton  = new RadioButton(ctx);
        radioButton.setId(1+i);
        radioButton.setText("Radio " + radioButton.getId());
        radioButton.setTextColor(getResources().getColor(R.color.black));

        radioGroup.addView(radioButton);

    }

}

RESULT

As you can see radio buttons have different style, someone could help me, if is possibile, to apply default style programmatically?

Answer 1

you have to create style on drawable or style.xml, as your requirement.

drawable/null_selector.xml

  <?xml version="1.0" encoding="utf-8"?> 
  <selector xmlns:android="http://schemas.android.com/apk/res/android" > 
         <item android:drawable="@android:color/transparent" /> 
  </selector> 

Set each button to use it (and to center the text) like this (R.drawable.null_selector is selector XML):

Now, In your Activity, you must be implement such style.

  RadioButton radioButton = new RadioButton(ctx);
  radioButton.setText(Integer.toString(i));
  radioButton.setGravity(Gravity.CENTER); 
  radioButton.setButtonDrawable(R.drawable.null_selector); 

I think, this will help you for implementing custom style in Radio Button.