问如何对来自不同LinearLayouts的RadioButton进行分组？

EN

class FooActivity {

    RadioButton m_one, m_two, m_three;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        ...
        m_one = (RadioButton) findViewById(R.id.first_radio_button);
        m_two = (RadioButton) findViewById(R.id.second_radio_button);
        m_three = (RadioButton) findViewById(R.id.third_radio_button);

        m_one.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                m_one.setChecked(true);
                m_two.setChecked(false);
                m_three.setChecked(false);
            }
        });

        m_two.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                m_one.setChecked(false);
                m_two.setChecked(true);
                m_three.setChecked(false);
            }
        });

        m_three.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                m_one.setChecked(false);
                m_two.setChecked(false);
                m_three.setChecked(true);
            }
        });

        ...     
    } // onCreate() 

}

import java.util.ArrayList;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Checkable;
import android.widget.LinearLayout;

public class MyRadioGroup extends LinearLayout {

private ArrayList mCheckables = new ArrayList();

public MyRadioGroup(Context context) {
    super(context);
}

public MyRadioGroup(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
}

public MyRadioGroup(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

@Override
public void addView(View child, int index,
        android.view.ViewGroup.LayoutParams params) {
    super.addView(child, index, params);
    parseChild(child);
}

public void parseChild(final View child)
{
    if(child instanceof Checkable)
    {
        mCheckables.add(child);
        child.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                for(int i = 0; i < mCheckables.size();i++)
                {
                    Checkable view = (Checkable) mCheckables.get(i);
                    if(view == v)
                    {
                        ((Checkable)view).setChecked(true);
                    }
                    else
                    {
                        ((Checkable)view).setChecked(false);
                    }
                }
            }
        });
    }
    else if(child instanceof ViewGroup)
    {
        parseChildren((ViewGroup)child);
    }
}

public void parseChildren(final ViewGroup child)
{
    for (int i = 0; i < child.getChildCount();i++)
    {
        parseChild(child.getChildAt(i));
    }
}
}

// add any number of RadioButton resource IDs here
GRadioGroup gr = new GRadioGroup(this, 
    R.id.radioButton1, R.id.radioButton2, R.id.radioButton3);

GRadioGroup gr = new GRadioGroup(rb1, rb2, rb3);
// where RadioButton rb1 = (RadioButton) findViewById(R.id.radioButton1);
// etc.

package pl.infografnet.GClasses;

import java.util.ArrayList;
import java.util.List;

import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewParent;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class GRadioGroup {

    List radios = new ArrayList();

    /**
     * Constructor, which allows you to pass number of RadioButton instances,
     * making a group.
     * 
     * @param radios
     *            One RadioButton or more.
     */
    public GRadioGroup(RadioButton... radios) {
        super();

        for (RadioButton rb : radios) {
            this.radios.add(rb);
            rb.setOnClickListener(onClick);
        }
    }

    /**
     * Constructor, which allows you to pass number of RadioButtons 
     * represented by resource IDs, making a group.
     * 
     * @param activity
     *            Current View (or Activity) to which those RadioButtons 
     *            belong.
     * @param radiosIDs
     *            One RadioButton or more.
     */
    public GRadioGroup(View activity, int... radiosIDs) {
        super();

        for (int radioButtonID : radiosIDs) {
            RadioButton rb = (RadioButton)activity.findViewById(radioButtonID);
            if (rb != null) {
                this.radios.add(rb);
                rb.setOnClickListener(onClick);
            }
        }
    }

    /**
     * This occurs everytime when one of RadioButtons is clicked, 
     * and deselects all others in the group.
     */
    OnClickListener onClick = new OnClickListener() {

        @Override
        public void onClick(View v) {

            // let's deselect all radios in group
            for (RadioButton rb : radios) {

                ViewParent p = rb.getParent();
                if (p.getClass().equals(RadioGroup.class)) {
                    // if RadioButton belongs to RadioGroup, 
                    // then deselect all radios in it 
                    RadioGroup rg = (RadioGroup) p;
                    rg.clearCheck();
                } else {
                    // if RadioButton DOES NOT belong to RadioGroup, 
                    // just deselect it
                    rb.setChecked(false);
                }
            }

            // now let's select currently clicked RadioButton
            if (v.getClass().equals(RadioButton.class)) {
                RadioButton rb = (RadioButton) v;
                rb.setChecked(true);
            }

        }
    };

}