I extended a class form LinearLayout, and I add two buttons in it(width- fill_parent, weight-1). But they can t place right. If I use LinearLayout insteadof my customClass, it is working right. What Should I do??

这是我的班子。

public class SplitButtonController extends LinearLayout
    implements
        OnClickListener {

// Toggle buttons
private Vector<XButton2> buttons;

// Listener
private OnClickListener listener;

public SplitButtonController(Context context, AttributeSet attrs) {
    super(context, attrs);
    LayoutInflater layoutInflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = layoutInflater.inflate(R.layout.xbutton2, this);

}

public SplitButtonController(Context context) {
    super(context);
}

@Override
protected void onFinishInflate() {
    super.onFinishInflate();
    init();
}

/**
 * Initialize the toggle buttons (set images and listeners). It s
 * responsibility of the user call this method after he add a ne
 */
public void init() {
    buttons = new Vector<XButton2>();
    addLayoutButtons();
    changeButtonsImage();
    setListeners();
}
private void addLayoutButtons() {
    int n = getChildCount();
    for (int i = 0; i < n; i++) {
        View v = getChildAt(i);
        if (v instanceof XButton2) {
            buttons.add((XButton2) v);
        }
    }
}

private void changeButtonsImage() {
    if (buttons.size() > 1) {
        buttons.get(0)
                .setBackgroundResource(
                        com.matriksdata.bavul.R.drawable.schedule_left_button_drawable);

        for (int i = 1; i < buttons.size() - 1; i++) {
            // buttons.get(i).setBackgroundResource(R.drawable.schedule_left_button_drawable);
        }
        buttons.get(buttons.size() - 1)
                .setBackgroundResource(
                        com.matriksdata.bavul.R.drawable.schedule_right_button_drawable);
    } else {
        // TODO:set an image with rounded sides
    }
}

private void setListeners() {
    for (int i = 0; i < buttons.size(); i++) {
        buttons.get(i).setOnClickListener(this);
        buttons.get(i).setFocusable(true);
    }
}

@Override
public void onClick(View v) {
    for (int i = 0; i < buttons.size(); i++) {
        XButton2 b = buttons.get(i);
        b.setChecked(v == b);
    }

}

}