Android : Create View Without Using Xml in Android

I have a abstract class:

public abstract class Component {
public abstract View addComponent();
public abstract void setAttribute(String attributeName, Object attributeValue);

}

And I have a sub class is EditText:

public class TextBox extends Component {

private EditText txt;

@Override
public EditText addComponent() {

    //Error message: The constructor EditText(TextBox) is undefined.
    txt = new EditText(this);

    return txt;
}

@Override
public void setAttribute(String attributeName, Object attributeValue) {

    switch (attributeName) {
    case "Width":
        txt.setWidth((int) attributeValue);
        break;
    case "Height":
        txt.setHeight((int) attributeValue);
        break;
    case "Top":
        txt.setY((float) attributeValue);
        break;
    case "Left":
        txt.setX((float) attributeValue);
        break;
    case "Name":
        txt.setText((String) attributeValue);
    default:
        break;
    }

}

}

Finally, in the MainACtivity:

public class MainActivity extends ActionBarActivity {

LinearLayout LinLay;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ScrollView sv = new ScrollView(this);

    LinLay = new LinearLayout(this);
    sv.addView(LinLay);

    TextBox t = new TextBox();
    EditText v = t.addComponent();

    LinLay.addView(v);


}
}

I want to create a EditText without xml in MainActivity class. But in the EditText class have a error. The program do not run.