AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.adi18.blood">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    firebaseDatabase.setPersistenceEnabled(true);
    <application
        android:allowBackup="true"
        android:hardwareAccelerated="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">
        <activity android:name=".Splash">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <activity android:name=".Donor" />
        <activity android:name=".First" />
        <activity android:name=".RegisterActivity" />
        <activity android:name=".OtpActivity" />
        <activity android:name=".Recipient" />
        <activity android:name=".ListDataActivity" />
        <activity android:name=".BloodBank" />
        <activity android:name=".Area" />
        <activity android:name=".Search" />
        <activity android:name=".FullData" />
        <activity android:name=".MainActivity"></activity>
    </application>

</manifest>