public class OverlayView
{

public static View initOverlay(LayoutInflater layoutInflater,
            WindowManager windowManager)
{
    TextView overlayTextView = (TextView) layoutInflater.inflate(
    R.layout.selection_overlay_textview, null);
    overlayTextView.setVisibility(View.INVISIBLE);
    WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.TYPE_APPLICATION,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
            PixelFormat.TRANSLUCENT);
    windowManager.addView(overlayTextView, lp);
    return overlayTextView;
}
}

//Activity
onCreate()
{
....
overlayTextView = (TextView) OverlayView.initOverlay(this.getLayoutInflater(),
(WindowManager) this.getSystemService(Context.WINDOW_SERVICE));
overlayTextView.setVisibility(View.INVISIBLE);
....
sidebar.setTextView(overlayTextView);`
}