чек бокс

package amurdroid.schet1609;
import android.app.Activity;import android.os.Bundle;import android.widget.CheckBox;import android.widget.CompoundButton;

public class Main2Activity extends Activity
        implements CompoundButton.OnCheckedChangeListener {
    private CheckBox mCheckBox;    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);        mCheckBox = (CheckBox)findViewById(R.id.checkbox);// Регистрация слушателя события        mCheckBox.setOnCheckedChangeListener(this);    }

    // Обработчик события изменения состояния флажка    public void onCheckedChanged(
            CompoundButton buttonView, boolean isChecked) {
        if (isChecked)
            mCheckBox.setText("CheckBox ON");        else            mCheckBox.setText("CheckBox OFF");    }
}

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent">    <CheckBox        android:id="@+id/checkbox"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="CheckBox OFF"/></LinearLayout>