Java 如何在android中格式化longs以始终显示两位数
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How to format longs in android to always display two digits
提问by Akshat Agarwal
I have a countdown timer which shows seconds from 60 to 0 (1 min countdown timer). When it reaches 1 digit numbers such as 9,8,7.. it shows 9 instead of 09. I tried using String.format("%[B]02d[/B]", x);
where I converted x from long to string. It didn't work.
我有一个倒数计时器,它显示从 60 到 0 的秒数(1 分钟倒数计时器)。当它达到 1 位数字时,例如 9,8,7.. 它显示 9 而不是 09。我尝试使用String.format("%[B]02d[/B]", x);
将 x 从 long 转换为 string 的地方。它没有用。
I want an equivalent of String.format("%2d", 1)
我想要一个相当于 String.format("%2d", 1)
采纳答案by Simon Dorociak
You can accomplish it with DecimalFormat:
您可以使用DecimalFormat完成它:
NumberFormat f = new DecimalFormat("00");
long time = 9;
textView.setText(f.format(time));
Output:
输出:
09
Or you can use String.format()as well:
或者你也可以使用String.format():
String format = "%1d"; // two digits
textView.setText(String.format(format, time));
回答by Joel Fernandes
Use: text.setText(String.format("%02d", i));
where i
is the integer value
用途:text.setText(String.format("%02d", i));
其中i
是整数值
回答by CodeWarrior
Try using this:
尝试使用这个:
tv.setText(new DecimalFormat("##").format(var));
回答by jonstaff
Why not just use an if statement?
为什么不直接使用 if 语句?
String str = x < 10 ? "0" + String.valueOf(x) : String.valueOf(x);
That should do the trick.
这应该够了吧。
回答by Sander Berloo van
TextView time;
int hour=0,minute=0,second=0;
time.setText((String.format("%02d", hour))+":"+(String.format("%02d", minute))+":"+(String.format("%02d", second)));
time to TextView
文本视图的时间