android - java.lang.RuntimeException with Facebook Login example -

-

i'm following facebook guide make login app android. after:

  1. install facebook app (unnecessary) on virtual device
  2. import facebook sdk android studio module
  3. import previous module project and
  4. modify code guide says

the project compiles. when run machine , try open application crash showing:

unfortunately, application has stopped.

i couldn't find solution after read similar posts this , this.

i'm using android 0.5.8, oracle jdk 7 , api 16 target, min , max.

the main files activity_main.xml, mainactivity.java , mainfragment.java.

here latest logcat output:

05-30 03:15:54.127      647-664/com.jdk8.minifacebookloginapp.app e/androidruntime﹕ fatal exception: asynctask #1     java.lang.runtimeexception: error occured while executing doinbackground()             @ android.os.asynctask$3.done(asynctask.java:299)             @ java.util.concurrent.futuretask$sync.innersetexception(futuretask.java:273)             @ java.util.concurrent.futuretask.setexception(futuretask.java:124)             @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:307)             @ java.util.concurrent.futuretask.run(futuretask.java:137)             @ android.os.asynctask$serialexecutor$1.run(asynctask.java:230)             @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1076)             @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:569)             @ java.lang.thread.run(thread.java:856)      caused by: java.lang.nullpointerexception             @ java.util.concurrent.concurrenthashmap.containskey(concurrenthashmap.java:781)             @ com.facebook.internal.utility.queryappsettings(utility.java:372)             @ com.facebook.widget.loginbutton$1.doinbackground(loginbutton.java:676)             @ com.facebook.widget.loginbutton$1.doinbackground(loginbutton.java:673)             @ android.os.asynctask$2.call(asynctask.java:287)             @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:305)             at java.util.concurrent.futuretask.run(futuretask.java:137)             at android.os.asynctask$serialexecutor$1.run(asynctask.java:230)             at java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1076)             at java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:569)             at java.lang.thread.run(thread.java:856)

the problem not coming code facebook sdk. can tell looking @ top of nullpointerexception

caused by: java.lang.nullpointerexception         @ java.util.concurrent.concurrenthashmap.containskey(concurrenthashmap.java:781)         @ com.facebook.internal.utility.queryappsettings(utility.java:372)

the error last 2 triggering lines facebook sdk (com.facebook.internal) , java.util package neither of code.

to fix this, need finish setup in facebook's getting started tutorial android register app after generating android key hash. after you've done that, open androidmanifest.xml , add meta-data line 

<application     android:allowbackup="true"     android:icon="@drawable/ic_launcher"     android:label="@string/app_name"     android:theme="@style/apptheme" >     <meta-data android:name="com.facebook.sdk.applicationid" android:value="@string/app_id"/>     <activity         android:name=".mainactivity"         android:label="@string/app_name" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity> </application>

then add app_id strings.xml file (found settings page in your facebook developer account app id on facebook developer account.

once you've done should compile


Comments

Post a Comment

Popular posts from this blog

c++ - OpenCV Error: Assertion failed <scn == 3 ::scn == 4> in unknown function, -

-
i read alot other solution still confused should mine... #include <opencv2/objdetect/objdetect.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> #include <iostream> #include <stdio.h> using namespace std; using namespace cv; int main(int argc, const char** argv) { //create cascade classifier object used face detection cascadeclassifier face_cascade; //use haarcascade_frontalface_alt.xml library face_cascade.load("haarcascade_frontalface_alt.xml"); //setup video capture device , link first capture device videocapture capturedevice; capturedevice.open(0); //setup image files used in capture process mat captureframe; mat grayscaleframe; //create window present results namedwindow("outputcapture", 1); //create loop capture , find faces while (true) { //capture new image frame capturedevice >> captureframe; ...
Read more

php - render data via PDO::FETCH_FUNC vs loop -

-
i've been using 2 methods render data. the first one: function name($id,$name){ return '<div id="'.$id.'">'.$name.'</div>'; } echo implode($pdo->query("select id,name user")->fetchall(pdo::fetch_func,'name')); the second one: $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); foreach($users $user){ echo name($user->id,$user->name); } i don't understand how pdo::fetch_func works. tried figure out. however, not well-documented. could please explain fetch mode? , also, 1 performs better? thank you. both methods wrong , have learn how use templates , how separate business logic presentation logic. $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); tpl::assign('users', $users); is code business logic part. then in template <?php foreach $users $row): ?> <div id="<?=$...
Read more

The canvas has been tainted by cross-origin data in chrome only -

-
uncaught securityerror: failed execute 'getimagedata' on 'canvasrenderingcontext2d': canvas has been tainted cross-origin data i getting above error in chrome. code(following) works fine in mozilla. have not corss domain issue. why above error in chrome? var wheel_canvas, wheel_context, can_w, can_h, wheel_grd; var large_radius = 160; var small_radius = 120; var wheel_canvas = document.getelementbyid('wheel_canvas'); var wheel_context = wheel_canvas.getcontext('2d'); var can_w = $(wheel_canvas).width(); var can_h = $(wheel_canvas).height(); var centerx = can_w / 2, centery = can_h / 2; var wheel_grd = null; test('#ff0000'); function test(hex) { $('#clrpicker').css({'left': 210, 'top': 210 }); inverted = hexbw(hex); $('#color_val_show').val(hex); current_color_hex_val_selected = hex; $('#color_val_show').css({'color':inverted,'background':hex}); fillgradient...
Read more