计算设备充满电的剩余时间 android

Question

我有一个 activity，其中包含一个 TextView，它应该显示 android 设备的剩余时间，该设备已插入并充满电... 我使用 BatteryManager class 来实现这个......我从那个 class 创建了一个对象并发现有一个方法叫做 ComputeChargeTimeRemaining 唯一的问题是该方法的结果是 long 数据类型，我不知道如何将这种数据类型转换为时间值......这正是我决定寻求帮助的原因......这是我正在使用代码...

class Notes : AppCompatActivity{
//TextView to show remaining charge time
TextView mytext;
//Timer to update the value of the TextView every Second 
System.Timers.Timer _timer;
protected override void OnCreate(Bundle SavedInstanceState){
  mytext=(TextView)FindViewById(Resource.Id.textView1);
_timer=new System.Timers.Timer(1000);
_timer.Enabled =true;
_timer.Elapsed += Timer_Elapsed;
  } 
private void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) {
RunOnUiThread(()=>{
BatteryManager batteryManager=(BatteryManager)GetSystemService(Context.BatteryService);
long remaining_time=batteryManager.ComputeRemainingChargeTime();
//Here is where I have a problem converting the long to real hours,minutes time format, please help
}) ;
} 
}

Answer 1

让我们访问文档：

computeChargeTimeRemaining

Compute an approximation for how much time (in milliseconds) remains until the battery is fully charged. Returns -1 if no time can be computed: either there is not enough current data to make a decision or the battery is currently discharging.

那我们该如何应对呢？

一个TimeSpan应该做

var timeSpan = TimeSpan.FromMilliseconds(remaining_time);

现在您拥有 TimeSpan 个赞 Hours、Minutes、Seconds 的特征。 TotalMinutes 等等，您还有格式说明符 Standard TimeSpan format strings:

    var hours timeSpan.Hours;
    var minutes = timeSpan.Minutes;
    // or
    var str = timespan.ToString("hh\:mm\:ss"));

计算设备充满电的剩余时间 android

Calculate Time left for Device to be fully Charged android

c#

android

battery