This Activity already has an act

  Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar
 to false in your theme to use a Toolbar instead.

姐姐解决办法,给其所在Activity添加

 <item name="windowNoTitle">true</item>

即可。