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();

                        }
                });

        }

}