- General writing:
//可以在setContentView()之前,也可以之后。
getActionBar().hide();
There is a pit, that is, a null pointer exception will be reported, the reason is whether the ActionBar exists in the Theme. For example, if Theme is set as follows, there will be a null pointer exception.
//AndroidManifest.xml文件中的application标签下,设置的AppTheme
android:theme="@style/AppTheme"
//具体设置
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
In this case, you need to use getSupportActionBar(), so you can cut the mess quickly.
if (getActionBar() != null) {
getActionBar().hide();
}
if (getSupportActionBar() != null) {
getSupportActionBar().hide();
}