android studio如何取消xml布局文件里面最上面的一条东西？

Question

在布局文件的代码里面是没有的，一跑在真机上顶部就会出现一条白色的东西。请问怎么把它去掉》？

Answer 1

Set the theme to NoActionBar and set it in style.xml:

<style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>

Then set the theme in the Activity in the AndroidManifest.xml file:

android:theme="@style/AppTheme.NoActionBar"

Answer 2

Baidu or Google search keyword "android cancel title"

Answer 3

It has nothing to do with the xml layout file. The white bar above is called the activity default title bar. It has a title bar by default. You can set the theme attribute of the activity (@xxx.NoTitleBar) or set the Window flag to FLAG_NO_TITLE before the activity setContentView

Answer 4

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.xxxx);
    }

Answer 5

This position is also related to the style of the theme. Does the project example you are looking for use toolbar?