DecimalFormat无法正确格式化我的数字

Question

I want to round all of my numbers to 1 decimal place.

For example

22.0
-6.1

I am using:

DecimalFormat decimalFormat = new DecimalFormat("0.0");
middlePanelTextView.setText(decimalFormat.format(score.getElevationAngle()));

But whole numbers don't have a 0 appended to it.

-18 should be -18.0 etc.

instead my value shows up as -18.

Answer 1

.@ represents a significant digit 0 doesn't.
.# represents and optional digit So try "##@.@"

http://developer.android.com/reference/java/text/DecimalFormat.html

I'm not sure about the syntax: but the above article should give you all you need.

Answer 2

尝试

middlePanelTextView.setText(""+decimalFormat.format(score.getElevationAngle()));

Answer 3

My TextView was cutting off the digits. My fault. Shrank font size.

Answer 4

Try using

DecimalFormat decimalFormat = new DecimalFormat("#.#");

as the constructor parameter instead.

Answer 5

尝试使用以下代码：

DecimalFormat decimalFormat = new DecimalFormat("0.0#");