automatic jump

public class MainActivity extends AppCompatActivity {
private int count=5;
private  Handler handler=new Handler(){

    @Override
    public void handleMessage(Message msg) {
        if (count>0){
            count--;
           tv.setText(count+"后自动跳转");
handler.sendEmptyMessageDelayed(1,1000);


        }else {
            Intent intent=new Intent();
            intent.setClass(MainActivity.this,Main2Activity.class);
            MainActivity.this.startActivity(intent);
            MainActivity.this.finish();

        }





        super.handleMessage(msg);
    }
};
    private TextView tv;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = findViewById(R.id.tv);
handler.sendEmptyMessageDelayed(0,1000);
    }

    public void tiaoguo(View view){
        handler.removeCallbacksAndMessages(null);
        Intent intent = new Intent(MainActivity.this,Main2Activity.class);
        startActivity(intent);
        finish();
    }


}