CountDownTimer的简单使用

下面是60秒的倒计时

activity

public class MainActivity extends AppCompatActivity {
    private TextView time;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        time = findViewById(R.id.timer);

        CountDownTimer timer = new CountDownTimer(1000L*60*60,1000L) {
            @Override
            public void onTick(long l) {
                //
                time.setText( (l/60)+"秒");
            }
            @Override
            public void onFinish() {
             
            }

        };
        timer.start();
    }
}

布局就是textview，用来设置显示的时间。