public class MainActivity extends Activity {
 private int i=5;
 private Handler handler=new Handler(){
  @Override
  public void handleMessage(Message msg) {
   super.handleMessage(msg);
   
  }
 };
 private TextView text;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  text = (TextView) findViewById(R.id.text);
  Timer timer = new Timer();
  
  TimerTask task=new TimerTask() {
   
   @Override
   public void run() {
    handler.post(new Runnable() {
     
     @Override
     public void run() {
      if(i>=0){
       text.setText((i--)+"");
      }
     }
    });
    if(i==0){
     finish();
     Intent intent = new Intent(MainActivity.this, Main2Activity.class);
     startActivity(intent);
    }
   }
  };
  timer.schedule(task, 0, 1000);
 }