<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bg"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:adjustViewBounds="true"
        android:contentDescription="@string/app_name"
        android:padding="15dp"
        app:srcCompat="@drawable/app_name" />

    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:adjustViewBounds="true"
        android:contentDescription="@string/app_name"
        android:padding="50dp"
        app:srcCompat="@drawable/icon_phone" />

</FrameLayout>

public class SplashScreenActivity extends Activity {
    // Время в милесекундах, в течение которого будет отображаться Splash Screen
    private final int SPLASH_DISPLAY_LENGTH = 3000;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash_screen);
        //getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                // По истечении времени, запускаем главный активити, а Splash Screen закрываем
                Intent mainIntent = new Intent(SplashScreenActivity.this, MainActivity.class);
                SplashScreenActivity.this.startActivity(mainIntent);
                SplashScreenActivity.this.finish();
            }
        }, SPLASH_DISPLAY_LENGTH);
    }
}