Adapter.java

public class MyAdapter {
	private List<MyItem> mDataSource;
	private int mSelectedPosition;
	
	private void selectPosition(int position) {
		// Set the selected position.
		this.mSelectedPosition = position;
		
		// Loop through our data source.
		for(int i = 0; i < mDataSource.size(); i++) {
			// If the index of our loop is the position that was selected, set isChecked to true.
			// Otherwise, isChecked should be false.
			// Replace with necessary code to shutoff radio button.
			mDataSource.get(i).isChecked = (i == mSelectedPosition);
		}
		
		// May need to revalidate
		notifyDataSetChanged();
	}
	
	public class MyViewHolder implements View.OnClickListener {
		public MyViewHolder(View view) {
			super(view);
			
			view.setOnClickListener(this);
		}
	
		@Override
		public void onClick() {
			// Select position that was clicked.
			selectPosition(getAdapterPosition);
		}
	}
}