This RadioGroup layout or its LinearLayout parent is useless

Question

I am trying to embed RadioGroup with LinearLayout, so to add elements dynamically to my Layout. My code goes here

`

<RadioButton
    android:id="@+id/dailyCheck"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/dailyCheck"/>

<RadioButton
    android:id="@+id/selectedCheck"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/selectedCheck" />

<RadioButton
    android:id="@+id/specificCheck"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/specificCheck" />

`

Doing this shows an exception:

This RadioGroup layout or its LinearLayout parent is useless

Please suggest me what to do.

Why can't LinearLayout and RadioGroup be together in one file.

Please post whole xml file. This warning is generally shown when you are not using any one layout of the two. — MysticMagicϡ, Jan 28 '13 at 05:49
Radiogroup is a subclass of LinearLayout. You can use it within LinerLayout. Post ur xml seems you are making some other mistake. — Shraddha Shravagi, Jan 28 '13 at 05:54
It's not like that we can not use LinerarLayout with RadioGroup. Please paste your entire layout file. Here I can see only RadioButtons hw I will understand parents and children in layout ??? — Hardik Trivedi, Jan 28 '13 at 05:51

score 2 · Accepted Answer · answered Jan 28 '13 at 05:52

package app.test;

import android.app.Activity;
import android.os.Bundle;

import android.view.Gravity;
import android.widget.LinearLayout;
import android.widget.RadioGroup;

public class Test extends Activity implements
RadioGroup.OnCheckedChangeListener {
  RadioGroup orientation;
  RadioGroup gravity;

  @Override
  public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);

orientation = (RadioGroup) findViewById(R.id.orientation);
orientation.setOnCheckedChangeListener(this);
gravity = (RadioGroup) findViewById(R.id.gravity);
gravity.setOnCheckedChangeListener(this);
  }

  public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.horizontal:
  orientation.setOrientation(LinearLayout.HORIZONTAL);
  break;

case R.id.vertical:
  orientation.setOrientation(LinearLayout.VERTICAL);
  break;

case R.id.left:
  gravity.setGravity(Gravity.LEFT);
  break;

case R.id.center:
  gravity.setGravity(Gravity.CENTER_HORIZONTAL);
  break;

case R.id.right:
  gravity.setGravity(Gravity.RIGHT);
  break;
}
  }
}

//main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <RadioGroup android:id="@+id/orientation"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5px">
<RadioButton
  android:id="@+id/horizontal"
  android:text="horizontal" />
<RadioButton
  android:id="@+id/vertical"
  android:text="vertical" />
  </RadioGroup>
  <RadioGroup android:id="@+id/gravity"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="5px">
    <RadioButton
      android:id="@+id/left"
      android:text="left" />
    <RadioButton
      android:id="@+id/center"
      android:text="center" />
    <RadioButton
      android:id="@+id/right"
      android:text="right" />
  </RadioGroup>
   </LinearLayout>

also you can see this example http://stackoverflow.com/questions/10461005/how-to-group-radiobutton-from-different-linearlayouts — kamal, Jan 28 '13 at 05:53
also see this example http://codecompiler.wordpress.com/2012/09/08/linear-layout/ — kamal, Jan 28 '13 at 05:57

This RadioGroup layout or its LinearLayout parent is useless

1 Answers1