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I'm trying to add some radio buttons to a Navigation Drawer.
This is what I've been trying so far :
activity_main_drawer.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 tools:showIn="navigation_view">

 <group
 android:id="@+id/radio_button_group"
 android:checkableBehavior="single"
 android:visible="true">
 <item
 android:id="@+id/radio_buttonX-axis"
 android:icon="@drawable/ic_x_axis"
 android:title="Show x-axis"
 app:actionViewClass="android.widget.RadioButton"/>
 <item
 android:id="@+id/radio_buttonY-axis"
 android:icon="@drawable/ic_y_axis"
 android:title="Show y-axis"
 app:actionViewClass="android.widget.RadioButton" />
 <item
 android:id="@+id/radio_buttonZ-axis"
 android:icon="@drawable/ic_z_axis"
 android:title="Show z-axis"
 app:actionViewClass="android.widget.RadioButton" />
 </group>
</menu>

Reference this and this answers.

Method 1: Add Radio Group after the Radio Buttons are created

Is this even possible?

int ids = R.id.radio_buttonX_axis, R.id.radio_buttonY_axis, R.id.radio_buttonZ_axis;
RadioGroup radioGroup = new RadioGroup(navigationView.getContext());
radioGroup.setOrientation(RadioGroup.VERTICAL);
for (int id : ids) 
 MenuItem menuItem = navigationView.getMenu().findItem(id);
 RadioButton radioButton = (RadioButton) menuItem.getActionView();
 radioGroup.addView(radioButton);

But it gives an error of :

The specified child already has a parent. You must call removeView()
on the child's parent first.

But I wasn't able to figure out how to call it

Method 2: Add Radio Buttons to Navigation Drawer dynamically

navigationView.getMenu().removeGroup(R.id.radio_button_group);
RadioGroup radioGroup = new RadioGroup(navigationView.getContext());
for (int i = 0; i < 3; i++) 
 RadioButton radioButton = new RadioButton(navigationView.getContext());
 radioButton.setText("Show X - Axis");
 radioGroup.addView(radioButton);

navigationView.addView(radioGroup);

But it doesn't works as expected (See Image).

I tried to add the radioGroup to Menu, but I couldn't figure out how to do it either. This is what I was trying to do :

Menu testMenu = navigationView.getMenu();
testMenu.add(R.id.radio_button_group, testMenu.findItem(R.id.radio_buttonX_axis).getActionView().getId(), 1, "Show X - Axis");

But it just adds an option to NavigationDrawer, not a radio button.

Method 3

This is just hypothetical, I don't know if it's even possible or not.

1. Copy the instances of all radio_buttons and store in some RadioButton array.


2. Remove Group (as done in Method 2)


3. Create a RadioGroup, and add all the RadioButtons to it.


4. Add this new RadioGroup to navigationView
   

But none has been helpful. Please tell me what to do?

You can add a radiobuttons in the menu drawer. First create an xml layout (radio_button.xml):

 <RadioGroup android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 xmlns:android="http://schemas.android.com/apk/res/android">

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

 <RadioButton
 android:id="@+id/radioButton2"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text="RadioButton" />
</RadioGroup>

Then add it to the drawer:

 <item android:title="Radios">
 <menu>
 <item
 app:actionLayout="@layout/radio_button"
 android:id="@+id/nav_radios"
 android:title=""
 />

 </menu>
 </item>