Question

我目前正在使用可运行的处理程序和一个计时器，该计时器每秒更新一次文本视图。

public class TimerFragment extends Fragment {


    TextView tvTimer;
    long startTime = 0;
    Handler timerHandler = new Handler();
    Runnable timerRunnable = new Runnable() {
        @Override
        public void run() {
            long millis = System.currentTimeMillis() - startTime;
            int seconds = (int)(millis/1000);
            int minutes = seconds / 60;
            seconds = seconds % 60;
            tvTimer.setText(String.format("%d:%02d", minutes, seconds));
            timerHandler.postDelayed(this,500);
        }
    };



    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.frag_timer, null);

        tvTimer = (TextView)view.findViewById(R.id.tvTimer);
        Button btn = (Button)view.findViewById(R.id.btn1);

        btn.setText("Start");
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Button b = (Button) v;

                if (b.getText().equals("Stop")){
                    timerHandler.removeCallbacks(timerRunnable);
                    b.setText("Start Monitoring");
                }

                else {
                    startTime = System.currentTimeMillis();
                    timerHandler.postDelayed(timerRunnable, 0);
                    b.setText("Stop");
                    Toast.makeText(getActivity(),"Monitoring started.",Toast.LENGTH_SHORT).show();
                }
            }
        });
        return view;
    }
}

如何获取计时器的值？例如，当文本变为“ 0:15”时显示敬酒。我希望能够获得该值，以便可以使用它。我想到的功能是让用户设置时间，并在计时器经过该时间（例如15或30秒）时弹出祝酒词或通知。但是现在我想知道的是如何获取计时器的值。谢谢！

Answer 1

您应该使用CountDownTimer来根据您设置的间隔设置倒计时，并且在未来时间到来时将停止

protected void Page_Load(object sender, EventArgs e)
{
  _searchDT = _dtMgr.GetTicketsByKeyword(uxKeywordTextBox.Text, null);
      ....
      if (!Page.IsPostBack)
            {
                DataRow dr = null;
                dr = _searchDT.NewRow();
                _searchDT.Rows.Add();
                uxSearchGridView.DataSource = _searchDT;
                uxSearchGridView.DataBind();
            }
        }
     ...
}

For more insights refer the Android Developer reference for CountDownTimer

如何获取处理程序/可运行计时器的值？

1 个答案: