Hi I'm trying to develop an application which runs for every interval time, lets say for every 1 minute it will display some `Toast message`.

But problem is I'm using `RadioButton` functionality is perfect but when I tap on one radio button it will be green, but when I close and re-open the activity I'll get as none of the radio buttons selected.

Here is my `MainActivity.java`

```
public class MainActivity extends Activity {

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

public void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();

    // Check which radio button was clicked
    switch(view.getId()) {
        case R.id.radio_one_min:
            if (checked)
            {
                //some code
            }
            break;
        case R.id.radio_ten_min:
            if (checked)
            {
                //some code
            }  
            break;

        case R.id.radio_disable:
            if (checked)
            {
                //some code
            }  
            break;   
    }
}
}

```

and here is my `activity_main.xml`

```
<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/radio">
<RadioButton android:id="@+id/radio_disable"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Disable"
    android:onClick="onRadioButtonClicked"/>
<RadioButton android:id="@+id/radio_one_min"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="1 minute"
    android:onClick="onRadioButtonClicked"/>
<RadioButton android:id="@+id/radio_ten_min"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="10 minute"
    android:onClick="onRadioButtonClicked"/>
</RadioGroup>

```

Please help me to solve this riddle.

Thanks in advance...