code: public static AppMsg makeText(Activity context, CharSequence text, Style style, float textSize) {
          return makeText(context, text, style, R.layout.app_msg, textSize);
      }
docs: @author mengguoqiang
  Make a {@link AppMsg} that just contains a text view.
  
  @param context The context to use. Usually your
  {@link android.app.Activity} object.
  @param text    The text to show. Can be formatted text.
  @param style   The style with a background and a duration.