android - 如何在android对话框中放置一个计时器

Question

如何在 android 对话框中放置一个计时器？我已经构建了所有对话框方法，但我似乎无法弄清楚每次计时器触发时如何更新对话框 View 中的文本。我的更新方法已经被另一个类每秒调用一次。

到目前为止，这是我的代码:

    public class PlaybackTimerEndingDialog extends DialogFragment implements TimerCallbacks.updateTimer {
    private AlertDialog.Builder mBuilder;
    private long mTime;
    private Context mContext;
    private View mTimerEndingView;

    public PlaybackTimerEndingDialog(long startTime, Context context){
        this.mTime = startTime;
        this.mContext = context;
    }


    private void updateView(String message_text){
        LayoutInflater inflater = this.getActivity().getLayoutInflater();
        this.mTimerEndingView = inflater.inflate(R.layout.playback_timer_ending, null);
        TextView messageView = (TextView) this.mTimerEndingView.findViewById(R.id.timer_ending_message);
        messageView.setText(message_text);
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the Builder class for convenient dialog construction
        this.updateView("The sleep timer will expie in "+ this.formatTime(this.mTime));

        this.mBuilder = new AlertDialog.Builder(this.mContext)
        //      this.mBuilder.setMessage("The sleep timer will expie in "+ this.formatTime(this.mTime))
        .setPositiveButton("Add more time", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id) {
                TimerCallbacks.createTimer listener = (TimerCallbacks.createTimer) PlaybackTimerEndingDialog.this.mContext;
                listener.createTimerDialog();
            }
        })
        .setNegativeButton("Cancel timer", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id) {
                TimerCallbacks.createTimer listener = (TimerCallbacks.createTimer) PlaybackTimerEndingDialog.this.mContext;
                listener.stopTimer();
            }
        });
        this.mBuilder.setView(this.mTimerEndingView);
        // Create the AlertDialog object and return it
        return this.mBuilder.create();
    }

    @Override
    public void finished() {
        // TODO Auto-generated method stub
    }

    @Override
    public void update(long time) {
        // TODO Auto-generated method stub
        //      this.getDialog().set
        this.updateView("The sleep timer will expie in "+ this.formatTime(time));
        this.mTime = time;
        Log.d("current time", Long.toString(time));
        //      this.mBuilder.setMessage("The sleep timer will expie in "+ this.formatTime(time));
    }

    private String formatTime(long time) {
        int seconds = (int) (time / 1000) % 60 ;
        int minutes = (int) ((time / (1000*60)) % 60);
        String mnStr = (minutes<10 ? "0" : "")+minutes;
        String secStr = (seconds<10 ? "0" : "")+seconds;
        return "-"+mnStr +":"+ secStr;
    }
}

如有任何帮助，我们将不胜感激。

Answer 1

将其放在您想要启动计时器的某个函数中。

        final Handler handler = new Handler();
        handler.postDelayed(new Runnable()
        {
            @Override
            public void run()
            {
               updateView("fired");

            }
        }, 1000);

Update:当dialog使用的是第一个inflated布局时，它是每次inflate新布局的update方法。