Question

我有一个CountDownTimer类来设置一个倒计时，当用户点击一些Button时，它将启动这是包含CountDownTimer

的代码

 public class play extends Activity implements View.OnClickListener{

        private TapCountDownTimer countDownTimer;   
        private final long startTime = 10;
        private final long interval = 1;
        private TextView countdowntext;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            this.requestWindowFeature(Window.FEATURE_NO_TITLE);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
            setContentView(R.layout.play);

        countDownTimer = new TapCountDownTimer(startTime, interval);
        countdowntext = (TextView)findViewById(R.id.countdowntext);
        countdowntext.setText(String.valueOf(startTime));

            Button buttonstart = (Button)findViewById(R.id.stopbutton);
                   buttonstart.setOnClickListener(new View.OnClickListener() {

                  public void onClick(View v){
                      countDownTimer.start();
                      }                
                });

            Button buttonstop = (Button)findViewById(R.id.stopbutton);
                   buttonstop.setOnClickListener(new View.OnClickListener() {

                  public void onClick(View v){
                      countDownTimer.cancel();
                      }                
                });

    public class TapCountDownTimer extends CountDownTimer {

        public TapCountDownTimer(long startTime, long interval)
            {
                super(startTime, interval);
            }

        @Override
        public void onTick(long millisUntilFinished)
            {
            countdowntext.setText(Long.toString(millisUntilFinished/1));

            }
        @Override
        public void onFinish()
            {
            countdowntext.setText("Time's up!");
            }
        }
    }

我在此行中设置了文字

countdowntext.setText(Long.toString(millisUntilFinished/1));

但它不起作用，文字显示＆＃34; Time＆＃39; Up＆＃34;而不是倒计时有谁知道如何解决这个问题？

Answer 1

您的startTime和interval被错误地设置为秒。
只需将两者乘以1000即可，因为您需要毫秒。

另请注意，您不需要长，以保持这么低的值整数会做。

    private final int startTime = 10000; // 10 secs
    private final int interval = 1000;   // 1s  = 1000 ms

这也没有意义：millisUntilFinished/1（将任何数字除以1会得到原始数字）必须是millisUntilFinished / 1000

文本在CountDownTimer中不显示字符串

1 个答案: