Android:使用文本视图中显示的时间在时间​​选择器中设置时间 [英] Android: Setting time in time picker with the time shown in text view

问题描述

在我的应用中，我在文本视图中将时间显示为 07:00 PM.单击文本视图时，会弹出一个时间选择器对话框，在该时间选择器中，我必须显示与文本视图中显示的时间完全相同的时间.但是，我不知道该怎么做.

In my app, I am showing time in text view as 07:00 PM. On click of the text view, a time picker dialog pops up, In that time picker, I have to show exactly the same time as what is appearing in textview. But, I am not getting how to do that.

代码

SimpleDateFormat sdf = new SimpleDateFormat("HH:mm a");
        //int hr = 0;
        Date date = null;
        try 
        {
            date = sdf.parse(resDateArray[3]);
        } 
        catch (ParseException e) {
            e.printStackTrace();
        }
        final Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        //tp is reference variable for time picker

        tp.setCurrentHour(calendar.get(Calendar.HOUR));
        tp.setCurrentMinute(calendar.get(Calendar.MINUTE));

        }//else

推荐答案

你应该使用 SimpleDateFormat 从你的 String 获取一个 Date 对象>.然后只需调用

You should use a SimpleDateFormat to get a Date object from your String. Then just call

picker.setCurrentHour(date.getHours())

和

picker.setCurrentMinute(date.getMinutes())

由于 Date 对象已被弃用，您应该使用 Calendar 代替它.您可以通过以下方式实例化 Calendar:

Since the Date object is deprecated, you should use a Calendar instead of it. You can instantiate a Calendar this way:

Calendar c = Calendar.getInstance();
c.setTime(date);
picker.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
picker.setCurrentMinute(c.get(Calendat.MINUTE));

完整代码:

import java.util.Date;
import java.text.SimpleDateFormat; //Don't use "android.icu.text.SimpleDateFormat"
import java.text.ParseException; //Don't use "android.net.ParseException"

SimpleDateFormat sdf = new SimpleDateFormat("hh:mm");
Date date = null;
try {
    date = sdf.parse("07:00");
} catch (ParseException e) {
}
Calendar c = Calendar.getInstance();
c.setTime(date);

TimePicker picker = new TimePicker(getApplicationContext());
picker.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
picker.setCurrentMinute(c.get(Calendar.MINUTE));

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