神奇问题赏至0527

This Activity already has an action bar supplied by the window decor

solution:

Manifest:->add

    <item name="windowActionBar">false</item>

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

 

Styles.xml->add_

<item name="windowActionBar">false</item>

 

source:https://*.com/questions/26515058/this-activity-already-has-an-action-bar-supplied-by-the-window-decor