Radio Buttons control in Android
In this article, I am going to explain how to
create two mutually-exclusive (in a group) radio buttons
(enabling one disables the other), using the
RadioGroup and
RadioButton widgets. When either radio
button is pressed, a toast message will be displayed.
Start a new
project, named RadioButtonDemo.
Open the
res/layout/main.xml file and add two
RadioButtons, nested in a
RadioGroup (inside the
LinearLayout):
<?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:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<RadioButton
android:id="@+id/radio_male"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Male"/>
<RadioButton
android:id="@+id/radio_female"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Female"/>
</RadioGroup>
</LinearLayout>
Now when each
RadioButton is selected, you need a
View.OnClickListener. so add the following code in the
Activity:
import
android.app.Activity;
import
android.os.Bundle;
import
android.view.View;
import
android.view.View.OnClickListener;
import
android.widget.RadioButton;
import
android.widget.Toast;
public
class
RadioButtonActivity
extends Activity {
private OnClickListener
radioListener=
new OnClickListener()
{
public
void onClick(View v) {
RadioButton rb=(RadioButton)v;
Toast.makeText(RadioButtonActivity.this, rb.getText(),
Toast.LENGTH_SHORT).show();
}
};
@Override
public
void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final RadioButton
radioMale=(RadioButton)findViewById(R.id.radio_male);
final RadioButton
radioFemale=(RadioButton)findViewById(R.id.radio_female);
radioMale.setOnClickListener(radioListener);
radioFemale.setOnClickListener(radioListener);
}
}
Run the application
Your output is something like below:
When any radio button is
selected by the user, the radiobutton text will display in the toast message.