没有操作栏的Android窗口全屏

Question

我通过编写以下代码使我的应用程序全屏显示而没有标题

<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>

但我可以像往常一样从顶部打开操作栏和通知栏。有没有办法永远不显示顶部操作栏。

全屏应用:

可见的状态栏:

只要我触摸并从顶部向下滑动，移动状态栏就会变得可见。如何阻止它？

更新:

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.sampleapp">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTask"
            android:stateNotNeeded="true"
            android:theme="@style/AppTheme.Wallpaper">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.HOME" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity android:name=".LockScreenActivity" />
    </application>
</manifest>

样式.xml

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <!-- THIS IS THE MAIN THEME -->
    <style name="AppTheme.Wallpaper" parent="@style/Theme.AppCompat.Light.NoActionBar">
        <item name="android:windowShowWallpaper">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowFullscreen">true</item>
    </style>
</resources>

Answer 1

在 style.xml 中使用此代码

<style name="AppTheme" parent="Theme.AppCompat.NoActionBar">
</style>