What Is The One Line Max Length Limit In Xml Files?

Recently I've faced an issue related to max line (string) length limit in a path attribute of vector xml. In my case 51k chars appears to be an overlimit while 29k is OK. Anyway,

Solution 1:

My guess reading your question was that the limit would be somewhere between 29k and 51k but clipped to a logical number

I might have found the answer by testing it. As you said, a char is stored on two bytes. So 29k char would be 58k bytes and 51k would be 102k bytes. The "logical" limit would be 65536 as it is 2^16. so the limit in char is 2^16 / 2 or 2^15 which is 32768

I tested to put strings in my string.xml (basically a long line of 'a')

<stringname="length_test32000">(32 000 a)</string><stringname="length_test32767">(32 767 a)</string><stringname="length_test32768">(32 768 a)</string><stringname="length_test32769">(32 769 a)</string><stringname="length_test33000">(33 000 a)</string>

Then i tried to log their size :

String test32k = getString(R.string.length_test32000);

String test32k767 = getString(R.string.length_test32767);
String test32k768 = getString(R.string.length_test32768);
String test32k769 = getString(R.string.length_test32769);

String test33k = getString(R.string.length_test33000);

Log.i("tag", "32000 : "+test32k.length());
Log.i("tag", "32767 : "+test32k767.length());
Log.i("tag", "32768 : "+test32k768.length());
Log.i("tag", "32769 : "+test32k769.length());
Log.i("tag", "33000 : "+test33k.length());

Here are the results :

I/tag: 32000 : 32000
I/tag: 32767 : 32767
I/tag: 32768 : 16
I/tag: 32769 : 16
I/tag: 33000 : 16

From 32768 it seems to be truncated so i log what was inside

Log.i("tag", "32768 : "+test32k768.length() + " content : " + test32k768);

And the result is :

I/tag: 32768 : 16 content : STRING_TOO_LARGE

The maximum char seems to be 32767 (2^15 - 1) characters. I didn't find any official doc that say that, but it is what i found while testing