嗨，我正在制作体育倒计时计时器，我想暂停和恢复它。但我不会在公共场合这么做，因为我的倒计时很复杂。我在这里粘贴代码，它是简单的倒计时，这样你就有代码，你可以尝试做它

public class MainActivity extends AppCompatActivity {
Button btn1, btn2, btn3;
TextView tv1, tv2;
int czasrundy = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tv1 = findViewById(R.id.textView);
    tv2 = findViewById(R.id.textView20);
    btn1 = findViewById(R.id.pausebutton);

    btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            CountDownTimer countDownTimer = new CountDownTimer(4000, 1000) {
                @Override
                public void onTick(long millisUntilFinished) {
                    tv1.setText(""+millisUntilFinished);

                }

                @Override
                public void onFinish() {

                }
            }

        }
    });

}

}