Checked Checkbox dynamically in Android

Setting the checkbox uncheck dynamically from java file;

Declaring the check box in layout XML file;

<CheckBox

                  android:id="@+id/chkActiveCall"

                  android:layout_width="wrap_content"

                  android:layout_height="wrap_content"

                  android:layout_above="@+id/buttonOk"

                  android:layout_alignParentLeft="true"

                  android:text="  Active Call Notification"

                  android:textSize="22sp" />

Unchecking Checkbox by

private void CheckedEnableCheckbox()

    {

       chkActiveCall.setChecked(false);

    }