Android Format Decimal Number using XML

Question

I want to format the number with 2 decimal places. I don't know why my code is receiving an error.

this is my code.

strings.xml:

<resources>
    <string name="progress">%1$d / %2$d (%3.2f%%)</string>
</resources>

MainActivity.java:

int progressCount;
int totalCount = 3000;
double percentage;

for (int x = 0; x < totalCount; x++) {
   progressCount = x;
   percentage = ((((double) progressCount) / ((double) totalCount)) * 100);
   Log.i("MainActivity", "Percentage: " + String.format(getString(R.string.progress), progressCount, totalCount, percentage));
}

Error encounter:

Caused by: java.util.IllegalFormatConversionException: %f can't format java.lang.Integer arguments

I want the output like this. 1/100 (0.01%)

I think it must be (%3$.2f%%) instead of (%3.2f%%) in your resource string. Please, refer here: https://stackoverflow.com/a/32755921/1803222 . — Anhayt Ananun, Oct 09 '17 at 03:51
As far as I understand, %3$ part helps the system to identify that 3th passed parameter will be used there. — Anhayt Ananun, Oct 14 '17 at 02:20

score 2 · Accepted Answer · answered Oct 09 '17 at 09:09

2

replace

 <string name="progress">%1$d / %2$d (%3.2f%%)</string>

with

 <string name="progress">%1$d / %2$d (%3$.2f)</string>

answered Oct 09 '17 at 09:09

Ankit Aman

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Android Format Decimal Number using XML

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