Dinesh Kumar Dinesh Kumar - 9 days ago 6
Android Question

How to add radio button dynamically as per the given number of counts?

I have tried this code..It will display three radio buttons in a single row when the emulator starts. But I need a button event for this. i.e; if I click the button, it should ask for number of radio buttons. then If I give the count, it must display the radio buttons based on the count given. For example, If I give the count as 3, it must display the three radio buttons in a single row.
Your help is highly appreciated.
Thanks in advance.

public class MyActivity extends Activity {
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
for(int row=0; row < 1; row++)
{
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.HORIZONTAL);
for(int i = 1; i < 4; i++) {
RadioButton rdbtn = new RadioButton(this);
rdbtn.setId((row * 2) + i);
rdbtn.setText("Radio " + rdbtn.getId());
ll.addView(rdbtn);
}
((ViewGroup)findViewById(R.id.radiogroup)).addView(ll);
}
}
}


this is xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<RadioGroup
android:id="@+id/radiogroup"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"/>

</RelativeLayout>

Answer

Please find below the code, I have created an 'EditText' and a 'Button' in the xml layout. Input a number in the 'EditText' and click the Button , The same no. of radio buttons will be added in the Layout.

This is your ActivityMain

public class ActivityMain extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        final EditText editText=(EditText)findViewById(R.id.et_no);

        findViewById(R.id.btn).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub


                int number=Integer.parseInt(editText.getText().toString());
                addRadioButtons(number);
            }
        });

    }

    public void addRadioButtons(int number) {

    for (int row = 0; row < 1; row++) {
        RadioGroup ll = new RadioGroup(this);
        ll.setOrientation(LinearLayout.HORIZONTAL);

        for (int i = 1; i <= number; i++) {
            RadioButton rdbtn = new RadioButton(this);
            rdbtn.setId((row * 2) + i);
            rdbtn.setText("Radio " + rdbtn.getId());
            ll.addView(rdbtn);
        }
        ((ViewGroup) findViewById(R.id.radiogroup)).addView(ll);
    }

  }

}

and here is your layout file

<RadioGroup
    android:id="@+id/radiogroup"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:orientation="vertical" />



<LinearLayout
    android:layout_marginTop="20dp"
    android:layout_marginLeft="20dp"
    android:layout_height="wrap_content"
    android:layout_width="match_parent">

    <EditText android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:hint="Enter no."
        android:inputType="number"
        android:id="@+id/et_no"/>


    <Button

        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="Add Radio btn"
        android:id="@+id/btn"/>
</LinearLayout>