Android报错集锦之一：You need to use a Theme.AppCompat theme (or descendant) with this activity.

Android 报错提示：java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

报错原因：

Android新建工程MainActivity默认继承AppCompatActivity,而在AndroidManifest.xml里theme主题同样默认继承Theme.AppCompat.Light.DarkActionBar。如果没有修改MainActivity的继承类为Activity，而只修改activity:theme的属性，理所当然会报错。

解决问题：

1.直接修改@style/AppTheme的属性值，设置合理的item：

<style name="AppTheme">    <!-- Customize your theme here. -->    <item name="colorPrimary">@color/colorPrimary</item>    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>    <item name="colorAccent">@color/colorAccent</item>    <item name="windowActionBar">false</item>    <item name="windowNoTitle">true</item></style>

2.修改MainActivity的继承类为Activity