Android沉浸式顶部实现代码及效果

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"

  tools:context=".MainActivity">

  <TextView
    android:layout_width="match_parent"
    android:layout_height="70dp"
    android:text="Hello World!"

    android:gravity="center"
    android:background="@color/colorAccent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
  <!-- android:fitsSystemWindows="true" android:clipToPadding="true"-->
</android.support.constraint.ConstraintLayout>

<style name="TranslucentTheme" parent="AppTheme">
    <!--在Android 4.4之前的版本上运行，直接跟随系统主题-->

  </style>

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <style name="TranslucentTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowTranslucentStatus">true</item>
    <item name="android:windowTranslucentNavigation">true</item>
  </style>

</resources>

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <style name="TranslucentTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowTranslucentStatus">false</item>
    <item name="android:windowTranslucentNavigation">true</item>
    <item name="android:statusBarColor">@android:color/transparent</item>
  </style>

</resources>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="controller.hzl.com.dingbu2">

  <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:theme="@style/TranslucentTheme"
      >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
  </application>

</manifest>