private int SPLASHTIME = 3000; //in milliseconds
private ImageView splash;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        splash = (ImageView) findViewById(R.id.imageView1);
        Runnable r = new Runnable(){
public void run() {
Intent i = new Intent(MainActiity.this,MainClass.class);
startActivity(i);
finish();
}
       
        };
        Handler handler = new Handler();
        handler.postDelayed(r, SPLASHTIME);
    }