AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="ml.coinlist.android"
    android:versionCode="12"
    android:versionName="1.2-dev">

    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="30" />

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

    <application android:label="@string/app_name"
        android:icon="@mipmap/ic_launcher"
        android:theme="@style/Theme.App">

        <activity android:name=".MainActivity"
            android:launchMode="singleTask"
            android:configChanges="orientation|screenSize|screenLayout|smallestScreenSize">

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

        <activity android:name=".SettingsActivity"
            android:parentActivityName=".MainActivity"
            android:launchMode="singleTop"
            android:configChanges="orientation|screenLayout|screenSize|smallestScreenSize" />
    </application>
</manifest>