Create Splash Screen or Welcome Screen in Android

 To create Splash Screen for your Android App

1. Create Handler Class
2. Use PostDelayed() function
3. Use Runnable (Code) & Time Delay

Steps:

A) Add Empty Activity

1. Go to java -> New -> Activity -> Empty Activity
2. Enter Activity Name: SplashActivity
3. Hit Finish Button

B) Design Splash Screen

1. Open layout -> activity_splash.xml
2. Cope the Background Image you want to use
3. Paste at drawables folder
4. Choose a file name for your image.
5. File name must be [a-z] in lowercase 0-9 digits or underscore. Capital Letter not allowed.
6. Now open activity_splash.xml file
7. Enter android:background="@drawable/bg_splash_screen"
8. You are done

Structure of activity_splash

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SplashActivity">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bg_splash_screen"
    />

C) Add Code in SplashActivity.java file

Here we use a Handler Class

PostDelayed Function to delay the display of the screen by 2500 milli second

And Runnable Method to end with.

Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    @Override
    public void run() {

    }
},2500);

This is how SplashActivity.java file look like:-

package xx.xxx.xxx; (It should be the name you choose while creating your android project)

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;

public class SplashActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);

        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {

            }
        },2500);
    }
}

D) Load MainActivity after 2.5 Second

Use Intent like this

public void run() {
    Intent intent = new Intent( SplashActivity.this,MainActivity.class);
    startActivity(intent);
}

Finally our SplashActivity.java looks like this:-

public class SplashActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);

        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Intent intent = new Intent( SplashActivity.this,MainActivity.class);
                startActivity(intent);
            }
        },2500);
    }
}

NOTE IF YOU GET RED COLOR IN Intent, hit Option + Enter button. This will import related class automatically.