package com.example.lenovo.mnyk01;

import android.content.Intent; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private static final int FLAG = 123;

    private Handler handler = new Handler(){         @Override         public void handleMessage(Message msg) {             super.handleMessage(msg);

           if(msg.what==FLAG){                Intent intent = new Intent(MainActivity.this,ShowActivity.class);                startActivity(intent);            }         }     };

    @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);

     TextView txt = findViewById(R.id.text);

    handler.sendEmptyMessageDelayed(FLAG,3000);

    } }