Layout Height AppCompat Not Full Screen

Question

What's wrong with AppCompat? My application does not use AppCompat and there are no problems with XML Layout But after I use AppCompat why is the XML Layout not full on the screen?

I tried by creating a new XML layout, but the results were the same.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="Hello World!"/>

</LinearLayout>

Answer 1

Add this theme to your activity

in style.xml

<style name="AppTheme" parent="@style/Theme.AppCompat.Light.NoActionBar">
<item name="android:windowNoTitle">true</item>
<item name="android:windowActionBar">false</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowContentOverlay">@null</item>
</style>

and define this style to your activity in AndroidManifest :

<activity
android:name=".YourActivity"
android:theme="@style/AppTheme"/>

Using this will remove the extra space coming for toolbar by default.

Answer 2

You can achieve fullscreen mode when you use AppCompact like this

Add this to your style file

<style name="Theme.AppCompat.Light.NoActionBar.FullScreen" 
  parent="@style/Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowActionBar">false</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

And in your manifest file add this to your Activity tag

android:theme="@style/Theme.AppCompat.Light.NoActionBar.FullScreen"