Android Studio Layout Preview Default Theme

Question

Maybe this is well known option in Android Studio but I couldn't find it and Google has not helped me with this :( Every time I open a layout preview in Android Studio it's applying Material.Light theme to every layout in my project and I need manually apply my own theme to see how it will look like in a real app. Does somebody know how to change default Material.Light theme to be my custom theme when previewing layout with Layout Previewer in Android Studio so I don't need to apply it manually every time?

Thanks in advance.

Answer 1

Click here and change theme to your theme.

If you want a single theme to always open, give

android:theme="@style/YourTheme" in your <application> tag in Manifest file.

From next time onwards, when you create a new xml file, this will be your default theme.

Answer 2

You need to provide default theme on application tag in AndroidManifest.xml file. If you don't provide android:theme="@style/{themeName} there will be added Material.Light default theme.

Please check example of code snippet from my manifest file

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

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


    <application
        android:allowBackup="true"
        android:icon="@drawable/iqall_main"
        android:label="@string/app_name"
        android:logo="@drawable/logo"
        android:theme="@style/AppTheme" <!--in Preview you will see this as default preview-->
        android:name=".IQallApp">
  </application>

</manifest>