Android size package decimals (java)

Question

i can display the size of a app package in MB but i have too much decimal numbers..

 ApplicationInfo appInfo = packageInfo.applicationInfo;

        try{
            File file = new File(appInfo.sourceDir);
            double sizeInBytes = file.length();  // size in Byte
            double sizeInMb = sizeInBytes / (1024 * 1024);
            physicalsize.setText(""+sizeInMb);
        } catch( Exception e ) {
            //e.printStackTrace();
        }

How can i have only 2 decimals like:

4.3 MB instead 4.35652148952

?

score 0 · Answer 1 · answered Nov 06 '13 at 16:23

0

Wouldn't something like this work?

String.format("%.1f", sizeInMb);

answered Nov 06 '13 at 16:23

Xaver Kapeller

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i tryied put your code before `physicalsize.setText(""+sizeInMb);` but not works :( – David_D Nov 06 '13 at 16:25
1

You have to do it like this: physicalsize.setText(String.format("%.1f", sizeInMb)); – Xaver Kapeller Nov 06 '13 at 16:26

score 0 · Answer 2 · answered Nov 06 '13 at 16:26

0

This should format the double into two decimal places.

DecimalFormat df = new DecimalFormat("#.00"); 
physicalsize.setText(df.format(sizeInMb))

James

answered Nov 06 '13 at 16:26

James Reeves

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Aaron C · Answer 3 · 2013-11-06T16:39:59.627

0

How about something along the lines of:

double a = 123.4567;
double roundOff = Math.round(a * 10.0) / 10.0;

The resulting output is "123.4"

You could just adapt this to your code.

edited Nov 06 '13 at 16:39

answered Nov 06 '13 at 16:32

Aaron C

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Android size package decimals (java)

3 Answers3