Question

我正在使用Handler在Service类中创建一个倒数计时器。计时器通过减少剩余时间来工作并通过更新Recyclerview项目正在运行的Texview来工作。问题是，当应用程序关闭并重新打开时，计时器将无法再更新Recyclerview项目正在运行的Texview。

来自Recyclerview Adapter我正在从Service调用该函数来启动计时器。在Eventbus libray的帮助下，我能够改变Texview。

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这是调用计时器的Service类的一部分。

...
@Override
public PageAdapter.TheViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    if (!EventBus.getDefault().isRegistered(this)) { //Register the EventBus library
        EventBus.getDefault().register(this);
    }
    View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_item, parent, false);
    return new TheViewHolder(itemView);
}

@Override
public void onBindViewHolder(final PageAdapter.TheViewHolder holder, int position) {
    holder.btn_start_countdown.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            new ServiceHelper().startTimer(milliseconds, holder);//Call the Function in Service to Start the Timer
        }
    }
}

//The Pojo that help EventBus to post the new data
public static class CounterTextPojo {
    volatile private long duration;
    private TheViewHolder holder;
    public CounterTextPojo(long duration, TheViewHolder holder){
        this.duration = duration;
        this.holder = holder;
    }
    public long getDuration(){
        return duration;
    }
}

//EventBus function to change the Textview Duration
@Subscribe(threadMode = ThreadMode.MAIN)
public void onEvent(CounterTextPojo data) {
    long duration = data.getDuration();
    TheViewHolder holder =  data.getHolder();
    int seconds = (int) (duration / 1000) % 60 ;
    int minutes = (int) ((duration / (1000*60)) % 60);
    int hours   = (int) ((duration / (1000*60*60)) % 24);
    holder.durationTexview.setText(String.format("%02d:%02d:%02d",hours,minutes,seconds));

    if(duration < 1){
        //Countdown Finish... Do Some staf
    }
}

实现我想要的可能方式是什么？

Android后台计时器更新Recyclerview的Texview项目

0 个答案: