错误信息: 

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.goatpm.app/com.zhihu.matisse.ui.MatisseActivity}: 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.

首先定义样式

    <style name="AppTheme" parent="Theme.AppCompat.Light">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
        <item name="android:windowActionBar">false</item>
        <item name="android:windowNoTitle">true</item>
    </style>

在AndroidManifest.xml的application标签中引用AppTheme样式