First Create New Project:)

• After That Create New Activity In Your Project.

• After That, We Have To Use MainActivity.java code And Create This Code.
• First Create Handler Object.

Handler handler=New Handler();

• After We Have To Use post Delayed Method.

handler.postDelayed(new Runnable()

• After That, we Have To Set The Time.

handler.postDelayed(new Runnable() {
            @Override
            public void run()
            {
                Intent intent=new Intent(MainActivity.this,HomePage.class);
                startActivity(intent);
            }
        },1000);

• After That, We Have To Use Intent Method For Moving One Activity To Second Activity

public void run()
            {
                Intent intent=new Intent(MainActivity.this,HomePage.class);
                startActivity(intent);
            }
        },1000);

• After That If You Want To Use Full-Screen Activity So You Can Use This Code In MainActivity.java Code.

The MainActivity.java  All codes Are.

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);
        Handler handler=new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run()
            {
                Intent intent=new Intent(MainActivity.this,HomePage.class);
                startActivity(intent);
            }
        },1000);
     }
}