public class MainActivity extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button bt = (Button) findViewById(R.id.button1);
        SharedPreferences pref= PreferenceManager.getDefaultSharedPreferences(getBaseContext());
        boolean check = pref.getBoolean("firstime", true);
        if(check==true){
            Intent i = new Intent(MainActivity.this, Tutorial_screen.class);//starting activity After timer stops
            startActivity(i);


        }
        bt.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                SharedPreferences pref1 = PreferenceManager
                        .getDefaultSharedPreferences(getBaseContext());
                Editor editor = pref1.edit();
                editor.putBoolean("firstime", true);
                editor.commit();

            }
        });

    }

}