android - Caused by: java.lang.UnsatisfiedLinkError: Cannot load library -


i writing game, , have huge native library, trying load native library in main activity like

 static {         try {             system.loadlibrary("mylib");         } catch (unsatisfiedlinkerror e) {             log.d(tag, "unsatisfied link error: " + e.tostring());         }     }

i have tested code on many devices in house, don't error. published logs "caused by: java.lang.unsatisfiedlinkerror: cannot load library". note: crash not universal, few people getting crash

  • is problem library put in exported apk ? have library put /libs/armabi/libmylib.so automatically eclipse?
  • is thing version of android ? supporting android versions since 2.3 (api level 9)
  • or need load library different place?
  • or missing important
  • is problem whole app being installed on sdcard ?

more info on crash : load_segments: 68 failed map segment mylib.so

considering app works correctly on of devices , gives error, it's safe assume library packaged correctly in apk , size/memory footprint acceptable.

as such, i'll go on whim , suggest problem build/compile architecture of library. newer android devices use arm7 processor. it's quite library compiled against arm7 architecture well. older devices, running android 2.3, use arm6 processor (i have 1 such device use testing - lg gt540 running android 2.3.3), not forward-compatible arm7 architecture. have seen crash error similar 1 indicated (load_segments: 68 failed map segment mylib.so) when attempted run app designed arm7 on old arm6 phone.

there 3 ways of going around issue:

  1. compile library against both architectures , include 2 separate .so files apk. @ runtime determine type of processor , load correct one. frankly, don't know if possible.

  2. create 2 separate apk files - 1 arm6 , 1 arm7 - use filters in manifest specify corresponding architecture. can upload both of them google play same app - , filters in manifest control 1 downloaded device.

  3. only support arm7 architecture specifying device requirements in manifest. loose customer audience, have less work maintaining 2 versions of app.

edit: according ndk documentation, can produce multiple libraries different architectures in 1 go. can control cpus want target adding following line application.mk file:

app_abi := arch1 arch2 arch3 ...

for example,

app_abi := armeabi armeabi-v7a mips

then build process create different versions of native library. these versions need placed in final apk in directory

lib/<abi>/lib<name>.so

where name of architecture. load library with

system.loadlibrary("<name>");

alternatively can build separate apk files each architecture use multi-apk functionality on google play.

you can find information on architecture targeting in file cpu-arch-abis.html file in docs subdirectory of ndk.


Comments

Post a Comment

Popular posts from this blog

php - cannot display multiple markers in google maps v3 from traceroute result -

i'm newbie in php mysql , google maps v3. have problems in google maps v3. made traceroute web based , map traceroute's result in google maps v3 final project of college education. have try many tutorials didn't work. have tried tutorials in forum nothing worked. problem cannot display multiple markers got location data database. maybe because i'm newbie , not know how do. confuse looping show markers. here code <?php error_reporting(e_all ^ (e_notice)); ini_set('max_execution_time', 360); $enable_log_user = false; global $ip, $host_name, $host_ip; $host = @$_post['host']; $trace = @$_post['trace']; $self = $_server['php_self']; include("phpsqlajax_dbinfo.php"); $connection = mysql_connect ('127.0.0.1', $username, $password); if (!$connection) { die('not connected : ' . mysql_error());} $db_selected = mysql_select_db($database, $connection); if (!$db_selected) { die ('can\'t use db :
Read more

c# - DetailsView in ASP.Net - How to add another column on the side/add a control in each row? -

i have detailsview control on page used edit various fields of record, works in respect. i looking way add 1 column (and if works, why not more) right, absolutely read-only, show same fields of record comparison purposes. i aware there no obvious way such thing out of box detailsview . have looked other controls (transposed gridview , recommended formview , listview ), nothing satisfies. have special data binding setup using detailsview , can't out of without losing features. anyone on how "hack in" additional columns (for display only) on detailsview ? the solution have now, use second detailsview , visible set false in aspx. in code, make sure databind hidden detailsview hosts data third column first, initial detailsview named itemdetails . and in item created event, pass third column html rendering of hidden controls (in last code block) : protected void itemdetails_itemcreated(object sender, eventargs e) { if (dataite
Read more

javascript - firefox memory leak -

i have following script (i use raphaeljs also) draws circle, waits 1 second, draws circle again, etc (you can copy paste - functional, need include raphael raphaeljs.com): <div id="holder"> </div> <script src="raphael.js" type="text/javascript"></script> <script> var paper = raphael(10, 50, 320, 200); var rad = math.pi / 180; var finangle = 0; function sector(cx, cy, r, startangle, endangle, params) { var x1 = cx + r * math.cos(-startangle * rad), x2 = cx + r * math.cos(-endangle * rad), y1 = cy + r * math.sin(-startangle * rad), y2 = cy + r * math.sin(-endangle * rad); return ["m", cx, cy, "l", x1, y1, "a", r, r, 0, +(endangle - startangle > 180), 0, x2, y2]; } var path = sector(100,100,50,0,180); var arc = paper.path(path); function draw() { path = sector(100,100,50,0,finangle);
Read more