AndroidManifest.xml

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

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

    <application
        android:name=".Home"
        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=".AccountActivity.DownloadActivity">
        </activity>
        <activity
            android:name=".AccountActivity.QuizOnlineActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".AccountActivity.FilesActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".AccountActivity.GalleryActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".DisabledActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".QuizActivity2"
            android:screenOrientation="portrait" />
        <activity
            android:name=".AccountActivity.ForgotPasswordActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".AccountActivity.ProfileActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".AccountActivity.SignUpActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".AccountActivity.LoginActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".AccountActivity.AdminActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".ResultsActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".RulesActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".QuizActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name=".MainActivity"
            android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>