Crash in open the app.
Device: Nexus 6
Android version: 5.1.0

06-17 10:36:25.204    6023-6023/com.google.samples.apps.topeka E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.google.samples.apps.topeka, PID: 6023
    java.lang.OutOfMemoryError: Failed to allocate a 5017612 byte allocation with 2124244 free bytes and 2MB until OOM
            at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
            at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
            at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
            at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
            at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:988)
            at android.content.res.Resources.loadDrawableForCookie(Resources.java:2474)
            at android.content.res.Resources.loadDrawable(Resources.java:2381)
            at android.content.res.Resources.getDrawable(Resources.java:787)
            at android.content.Context.getDrawable(Context.java:403)
            at android.widget.ImageView.resolveUri(ImageView.java:747)
            at android.widget.ImageView.setImageResource(ImageView.java:398)
            `at com.google.samples.apps.topeka.adapter.AvatarAdapter.setAvatar(AvatarAdapter.java:52)`
            `at com.google.samples.apps.topeka.adapter.AvatarAdapter.getView(AvatarAdapter.java:47)`
            at android.widget.AbsListView.obtainView(AbsListView.java:2347)
            at android.widget.GridView.makeAndAddView(GridView.java:1433)
            at android.widget.GridView.makeRow(GridView.java:361)
            at android.widget.GridView.fillDown(GridView.java:302)
            at android.widget.GridView.fillFromTop(GridView.java:437)
            at android.widget.GridView.layoutChildren(GridView.java:1276)
            at android.widget.AbsListView.onLayout(AbsListView.java:2151)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2114)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
            at android.view.Choreographer$CallbackRecord.run(

Using 1d973e8 :

Upgrade plugin to 2.0.0-alpha1+

Launch topeka, edit first_name string resource, then hit "instant run":

App will crash with:

java.lang.NullPointerException: Attempt to invoke virtual method 'int com.google.samples.apps.topeka.model.Avatar.ordinal()' on a null object reference
at com.google.samples.apps.topeka.fragment.SignInFragment.onSaveInstanceState(SignInFragment.java:96)
at android.support.v4.app.Fragment.performSaveInstanceState(Fragment.java:2109)
at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1767)
at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1835)
at android.support.v4.app.FragmentController.saveAllState(FragmentController.java:125)
at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:523)
at android.app.Activity.performSaveInstanceState(Activity.java:1298)
at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1289)
at android.app.ActivityThread.callCallActivityOnSaveInstanceState(ActivityThread.java:4088)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4050)
at android.app.ActivityThread.-wrap15(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1350)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616

1607-1607/com.google.samples.apps.topeka E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.google.samples.apps.topeka, PID: 1607
java.lang.OutOfMemoryError: Failed to allocate a 5017612 byte allocation with 2124476 free bytes and 2MB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:988)
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2474)
at android.content.res.Resources.loadDrawable(Resources.java:2381)
at android.content.res.Resources.getDrawable(Resources.java:787)
at android.content.Context.getDrawable(Context.java:403)
at android.widget.ImageView.resolveUri(ImageView.java:747)
at android.widget.ImageView.setImageResource(ImageView.java:398)
at com.google.samples.apps.topeka.adapter.AvatarAdapter.setAvatar(AvatarAdapter.java:52)
at com.google.samples.apps.topeka.adapter.AvatarAdapter.getView(AvatarAdapter.java:47)
at android.widget.AbsListView.obtainView(AbsListView.java:2347)
at android.widget.GridView.makeAndAddView(GridView.java:1433)
at android.widget.GridView.makeRow(GridView.java:361)
at android.widget.GridView.fillDown(GridView.java:302)
at android.widget.GridView.fillFromTop(GridView.java:437)
at android.widget.GridView.layoutChildren(GridView.java:1276)
at android.widget.AbsListView.onLayout(AbsListView.java:2151)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2114)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
at android.view.Choreographer$CallbackRecord.run(

device： genymotion nexus6 5.1

Hi,

I've already played Topeka game and I noticed that if I answer the question with lowercase letters like "texas" when correct is "Texas" it returns false and no points.

Could you make a small change in code to make every first letter of user answer capital?

Cheers.

Device: Nexus 4
Android version: 5.1.1

06-17 10:35:06.099 10078-10078/com.google.samples.apps.topeka E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.google.samples.apps.topeka, PID: 10078
java.lang.NullPointerException: Attempt to read from field 'android.os.Handler android.app.Activity.mHandler' on a null object reference
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1427)
at android.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:483)
at android.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:498)
at android.app.Activity.onBackPressed(Activity.java:2482)
at com.google.samples.apps.topeka.activity.QuizActivity.access$201(QuizActivity.java:42)
at com.google.samples.apps.topeka.activity.QuizActivity$2.onAnimationEnd(QuizActivity.java:127)
at android.view.ViewPropertyAnimator$AnimatorEventListener.onAnimationEnd(ViewPropertyAnimator.java:1116)
at android.animation.ValueAnimator.endAnimation(ValueAnimator.java:1171)
at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:722)
at android.animation.ValueAnimator$AnimationHandler.run(ValueAnimator.java:738)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:549)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Lint detects usage of v21 resources on pre-lollipop devices:

1. Animators using interpolators only used on v21, can be moved to animator-v21.
2. Same for transitions, only used on v21, can be moved to transitions-v21 to avoid lint errors.
3. List items need to use Appcompat, currently using Material Theme only avalaible on API 21+.
   
   

Used here:

Solution for ListItem:

Workaround for ListItemSecondary, currently not included in AppCompat, use directly Body1:

If you answer a question and then press the submit button two or three times, the app quickly performs the transition multiple times (looks pretty jumpy), several questions get answered (which is definitely not intended), and then sometimes the submit button's icon (either a cross or a checkmark) is rotated and / or skewed.

Like this:

hi,
first,tnx for new version(Support pre-lolipop)
second,how i can start blank activity(for example about activity) when user click one of the categories?

1 Only my answers are always correct, this minimal change demonstrates it :)

2 My teachers were stricter correcting my tests :(

3 Put a cat on your life 😸

The child views are recycled and not all are visible when using a gridView.

To reproduce a NPE, select the last avatar, rotate to landscape mode and press the fab button.
The childCount will be (using a nexus 5) 11 and the avatar.ordinal 16.

The issue is in this line and a better explanation and solution here and here.

java.lang.IllegalArgumentException: Shared element must not be null
  at android.app.ActivityOptions.makeSceneTransitionAnimation(ActivityOptions.java:561)
  at android.support.v4.app.ActivityOptionsCompat21.makeSceneTransitionAnimation(ActivityOptionsCompat21.java:45)
  at android.support.v4.app.ActivityOptionsCompat.makeSceneTransitionAnimation(ActivityOptionsCompat.java:171)
  at com.google.samples.apps.topeka.fragment.SignInFragment.performSignInWithTransition(SignInFragment.java:224)
  at com.google.samples.apps.topeka.fragment.SignInFragment.access$800(SignInFragment.java:48)
  at com.google.samples.apps.topeka.fragment.SignInFragment$3$1.run(SignInFragment.java:172)
  at android.view.ViewPropertyAnimator$AnimatorEventListener.onAnimationEnd(ViewPropertyAnimator.java:1119)
  at android.animation.ValueAnimator.endAnimation(ValueAnimator.java:1239)
  at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:766)
  at android.animation.ValueAnimator$AnimationHandler$1.run(ValueAnimator.java:801)
  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
  at android.view.Choreographer.doCallbacks(Choreographer.java:670)
  at android.view.Choreographer.doFrame(Choreographer.java:603)
  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
  at android.os.Handler.handleCallback(Handler.java:739)
  at android.os.Handler.dispatchMessage(Handler.java:95)
  at android.os.Looper.loop(Looper.java:148)
  at android.app.ActivityThread.main(ActivityThread.java:5417)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
  11-30 13:26:37.409 28287-28287/com.google.samples.apps.topeka I/Process: Sending signal. PID: 28287 SIG: 9

Hello,
I am wondering why you chose to use enum type for drawables in Avatar.java. According to Google's best practices for Android, enums are more memory hungry than TypeDefs at runtime. So wouldn't it be more prudent to use @DrawableRes as described here: http://tools.android.com/tech-docs/support-annotations?

Thanks,
Igor

I combined this project with LeakCanary,and find a memory leak, here are the details:

• com.google.samples.apps.topeka.activity.CategorySelectionActivity has leaked:
• GC ROOT static com.google.samples.apps.topeka.persistence.TopekaDatabaseHelper.mInstance
• references com.google.samples.apps.topeka.persistence.TopekaDatabaseHelper.mContext
• leaks com.google.samples.apps.topeka.activity.CategorySelectionActivity instance

And I don't know how to fix it...

Which classes I can change the questions that I want? How can I do that? I am reading the classes but not idea yet

Hoping to get some direction on how to fix issues like this. I often see this type of flickering and misaligned animations when using ActivityOptions to pass views.

You can add this to QuizActivity.onCreate(), but it only stops the status bar/nav bar flickering (and not the misaligned views). It's also a nasty little block of code that shouldn't be necessary everywhere, and I'm hoping there's a better way.

postponeEnterTransition();

final View decor = getWindow().getDecorView();
decor.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    @Override
    public boolean onPreDraw() {
        decor.getViewTreeObserver().removeOnPreDrawListener(this);
        startPostponedEnterTransition();
        return true;
    }
});

When I clicked a Category Item(Food & Drink, General Knowlegde, ... etc), QuizActivity represents mIcon to smaller size.

I'm running on Emulator(API21 / x86)

Sorry, That's all..

Hello Developers..Could any one help me with the necessary steps to compile topeka because i get an error that the project doesnot use the graddle build system

Floating label for TextInputLayout overlaps last initial on S2 API 4.4.4

and the hint is too close to the text field divider.

I don't know the best way to fix it but I solved it deleting the paddinTop and paddingBottom on both TextInputLayouts.

I tested this change on that device and confirmed that nexus5 and nexus7 still look good.
I can not test it on other devices due to either are not supported or the screen size is greater and are not affected.

Optionally I tried to follow the Material Design Spec ,like reducing text size to 16sp as recommended, it helped but it didn't solve the issue.

I can pull request the padding deletion but would be better that someone check it on more devices or propose a better solution. I'm not familiar with this new view.

This code is old and the app is different from the screenshots. There is no leaderboard or profile. Please update.

When I tried to run ./gradlew tasks, it said FAILURE: Build failed with an exception.

I am trying to replace the images in drawable. I am not being able, cause I choose new images and rename them, when I compile the project the images keep the same. Any help? I already tried clean and rebuild the project.

Hi,

I've already noticed:

Cheers

Hello,

I need help. I imported this project on android studio and after this i try to run but Android Studio showing me now 70 errors

Error:(97, 54) illegal start of type
Error:(241, 50) illegal start of type
Error:(411, 29) expected
Error:(411, 31) '{' expected
Error:(411, 46) not a statement
Error:(411, 47) ';' expected
Error:(416, 5) illegal start of expression
Error:(416, 13) illegal start of expression
Error:(416, 42) ';' expected
Error:(416, 60) ';' expected
Error:(416, 69) not a statement
Error:(416, 82) ';' expected
Error:(416, 84) not a statement
Error:(416, 95) ';' expected
Error:(429, 5) illegal start of expression
Error:(429, 47) ';' expected
Error:(429, 57) not a statement
Error:(429, 68) ';' expected
Error:(441, 5) illegal start of expression
Error:(441, 13) illegal start of expression
Error:(441, 30) ';' expected
Error:(441, 63) ';' expected
Error:(441, 64) not a statement
Error:(441, 70) ';' expected
Error:(442, 19) ';' expected
Error:(442, 20) not a statement
Error:(442, 30) ';' expected
Error:(442, 39) not a statement
Error:(442, 52) ';' expected
Error:(452, 5) illegal start of expression
Error:(452, 13) illegal start of expression
Error:(452, 40) ';' expected
Error:(452, 73) ';' expected
Error:(452, 74) not a statement
Error:(452, 80) ';' expected
Error:(453, 19) ';' expected
Error:(453, 20) not a statement
Error:(453, 30) ';' expected
Error:(453, 39) not a statement
Error:(453, 52) ';' expected
Error:(481, 5) illegal start of expression
Error:(481, 13) illegal start of expression
Error:(481, 35) ';' expected
Error:(481, 68) ';' expected
Error:(481, 69) not a statement
Error:(481, 73) ';' expected
Error:(482, 19) ';' expected
Error:(482, 20) not a statement
Error:(482, 30) ';' expected
Error:(482, 39) not a statement
Error:(482, 52) ';' expected
Error:(489, 2) reached end of file while parsing

That illegal type showing this "<>"

Are there any plans about migrating to kotlin? If there are, Would love to contribute migrating.

How can i update questions from a json file using a server

Is it possible to update "categories.json" in "raw" folder
I am New to programming hope someone will help
Thank u
(I know this is not the right place to ask.if is is inappropriate pls remove it) :)

Hi,
The application can not be installed on Android 5 down
I have Android 4.4 and 4, but the program is not installed
Please solve this problem.

On some conditions, all the visible category cards disappeared after coming back from QuizActivity. Like the screenshot below:

But you can still scroll up those left cards which are outside the screen previously.

Though not guaranteed, you may reproduce this bug as following:

1. Click one category card to go to QuizActivity;
2. Press back to go back to CategorySelectionActivity;
3. Repeat 1 & 2 until the bug occurs.

Or, you can do the following steps to make it easier to happen:

1. Go to Developer options in Settings;
2. Change Animator duration scale to 5x or 10x;
3. Back to Topeka;
4. Click one category card to go to QuizActivity;
5. Press back, and don't stop, press back a few more times duration the window transition;
6. Repeat 4 & 5 until the bug occurs.

What's strange is that it can be reproduced 100% consecutively sometimes even I kill the App from the overview screen.

Phone: Nexus 6P
Android version: 7.0
Code: latest of master branch

Hi,

I would like to suggest you to instead of using exisiting action menu with logout item try to implement nice -looking button in this place. I think it might improve a little an user experience of this app.

What do you think guys about this idea?

Cheers

Why can't I import the following dependencies?

compile 'com.android.support:cardview-v7:23.0.1'
compile 'com.android.support:recyclerview-v7:23.0.1'
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.google.apis:google-api-services-youtube:v3-rev149-1.20.0'
compile 'com.google.http-client:google-http-client-android:1.20.0'
compile 'com.google.api-client:google-api-client-android:1.20.0'
compile 'com.google.api-client:google-api-client-gson:1.20.0'

I keep getting these errors:

C:\Android\Projects\android-topeka-master-master\android-topeka-master-master\app\src\main\java\com\google\samples\apps\topeka\com\george\videos\GetPlaylistTitlesAsyncTask.java
Error:(13, 76) error: cannot find symbol class PlaylistListResponse
Error:(18, 13) error: cannot find symbol class YouTube
Error:(20, 39) error: cannot find symbol class YouTube
Error:(25, 15) error: cannot find symbol class PlaylistListResponse

Is possible to add image as part of question?

Process: com.google.samples.apps.topeka, PID: 8042
java.lang.OutOfMemoryError: Failed to allocate a 5017612 byte allocation with 2098356 free bytes and 2MB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:988)
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2474)
at android.content.res.Resources.loadDrawable(Resources.java:2381)
at android.content.res.Resources.getDrawable(Resources.java:787)
at android.content.Context.getDrawable(Context.java:403)
at android.widget.ImageView.resolveUri(ImageView.java:747)
at android.widget.ImageView.setImageResource(ImageView.java:398)
at com.google.samples.apps.topeka.adapter.AvatarAdapter.setAvatar(AvatarAdapter.java:52)
at com.google.samples.apps.topeka.adapter.AvatarAdapter.getView(AvatarAdapter.java:47)
at android.widget.AbsListView.obtainView(AbsListView.java:2347)
at android.widget.GridView.makeAndAddView(GridView.java:1433)
at android.widget.GridView.makeRow(GridView.java:361)
at android.widget.GridView.fillDown(GridView.java:302)
at android.widget.GridView.fillFromTop(GridView.java:437)
at android.widget.GridView.layoutChildren(GridView.java:1276)
at android.widget.AbsListView.onLayout(AbsListView.java:2151)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15671)
at android.view.ViewGroup.layout(ViewGroup.java:5038)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2114)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
at android.view.Choreographer$CallbackRecord.run(
06-19 01:40:29.310 8042-8056/com.google.samples.apps.topeka I/art﹕ Clamp target GC heap from 102MB to 96MB

This test was not annotated:

com.google.samples.apps.topeka.activity.SignInActivityTest > signIn_performSignIn[Nexus 5 - 6.0] FAILED
        android.support.test.espresso.PerformException: Error performing 'single click' on view 'with id: com.google.samples.apps.topeka:id/done'.
        at android.support.test.espresso.PerformException$Builder.build(PerformException.java:83)

We can add a default avatar but then a new test would fail:

com.google.samples.apps.topeka.activity.SignInActivityTest > avatar_noneChecked[Nexus 5 - 6.0] FAILED
        android.support.test.espresso.base.DefaultFailureHandler$AssertionFailedWithCauseError: 'not with checkbox state: is <true>' doesn't match the selected view.
        Expected: not with checkbox state: is <true>

These latest changes and the next method seem to consider all the preferences required:

    /**
     * Check whether a user is currently signed in.
     *
     * @param context The context to check this in.
     * @return <code>true</code> if login data exists, else <code>false</code>.
     */
    public static boolean isSignedIn(Context context) {
        final SharedPreferences preferences = getSharedPreferences(context);
        return preferences.contains(PREFERENCE_FIRST_NAME) &&
                preferences.contains(PREFERENCE_LAST_INITIAL) &&
                preferences.contains(PREFERENCE_AVATAR);
    }

So getPlayer needs to be stricter and change && by || like this:

        if (null == firstName || null == lastInitial || null == avatar) {

Otherwise I think would be possible to be signed in and be considered signed out in some places.

The textWatcher currently only detects that one editText contains text.

It's necessary to only show the mFabDone when an avatar is selected and both editText contain text.

I added tests that detect these issues and offer a possible solution to fix it:

com.google.samples.apps.topeka.activity.SignInActivityTest > signIn_withoutFirstNameFailed[Nexus 5 - 6.0] FAILED
        android.support.test.espresso.base.DefaultFailureHandler$AssertionFailedWithCauseError: 'not is displayed on the screen to the user' doesn't match the selected view.
        Expected: not is displayed on the screen to the user

com.google.samples.apps.topeka.activity.SignInActivityTest > signIn_withoutLastInitialFailed[Nexus 5 - 6.0] FAILED
        android.support.test.espresso.base.DefaultFailureHandler$AssertionFailedWithCauseError: 'not is displayed on the screen to the user' doesn't match the selected view.
        Expected: not is displayed on the screen to the user

com.google.samples.apps.topeka.activity.SignInActivityTest > signIn_withoutAvatarFailed[Nexus 5 - 6.0] FAILED
        android.support.test.espresso.base.DefaultFailureHandler$AssertionFailedWithCauseError: 'not is displayed on the screen to the user' doesn't match the selected view.
        Expected: not is displayed on the screen to the user

11-18 13:46:51.797 25212-25212/com.google.samples.apps.topeka 
E/AndroidRuntime: FATAL EXCEPTION: main
 Process: com.google.samples.apps.topeka, PID: 25212
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Enum.name()' on a null object reference
    at com.google.samples.apps.topeka.helper.PreferencesHelper.writeToPreferences(PreferencesHelper.java:49)
    at com.google.samples.apps.topeka.fragment.SignInFragment.savePlayer(SignInFragment.java:238)
    at com.google.samples.apps.topeka.fragment.SignInFragment.access$200(SignInFragment.java:48)
    at com.google.samples.apps.topeka.fragment.SignInFragment$3.onClick(SignInFragment.java:161)
    at android.view.View.performClick(View.java:5198)
    at android.view.View$PerformClick.run(View.java:21147)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5417)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Hi,
here is a sample question

{
    "type": "single-select-item",
    "question": "What U.S. President committed an unpardonable sin by kissing the Queen Mother on the lips?",
    "options": [
      "George W. Bush",
      "Jimmy Carter",
      "Barack Obama",
      "Lyndon B. Johnson",
      "Ronald Reagan"
    ],
    "answer": [1]
  },

What the meaning of answer": [1] ?
is 1 stand for George W. Bush?
or
The answer only 1 ?
i tried answer George W. Bush but wrong...

And,
How to change image logo (Music,Sport,Entertaiment etc)
Should i change the png or the xml?
Thank you very much ^_^

I am unable to do a gradle build on the latest code. The app's build.gradle fails. See screenshot:

In Android Studio 2.0, in experimental Gradle settings, there is an option to enable all test artifacts at the same time. This removes the necessity to change to "Unit Tests" and "Instrumentation Tests" in Build Variants section every time.

When this is enabled, the source sets in both test and androidTest folders are included. And this causes conflicts in class names. Here is the screenshot.

In the question "Which letter other than X scores 8 in Scrabble?" it crashes when moving the SeekBar to the end past Z.

06-16 19:27:08.304 15982-15982/com.google.samples.apps.topeka E/InputEventReceiver﹕ Exception dispatching input event.
06-16 19:27:08.305 15982-15982/com.google.samples.apps.topeka D/AndroidRuntime﹕ Shutting down VM
06-16 19:27:08.327 15982-15982/com.google.samples.apps.topeka E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.google.samples.apps.topeka, PID: 15982
java.lang.IndexOutOfBoundsException: Invalid index 26, size is 26
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.Arrays$ArrayList.get(Arrays.java:66)
at com.google.samples.apps.topeka.widget.quiz.AlphaPickerQuizView.onProgressChanged(AlphaPickerQuizView.java:83)
at android.widget.SeekBar.onProgressRefresh(SeekBar.java:95)
at android.widget.ProgressBar.doRefreshProgress(ProgressBar.java:1262)
at android.widget.ProgressBar.refreshProgress(ProgressBar.java:1274)
at android.widget.ProgressBar.setProgress(ProgressBar.java:1321)
at android.widget.AbsSeekBar.trackTouchEvent(AbsSeekBar.java:661)
at android.widget.AbsSeekBar.onTouchEvent(AbsSeekBar.java:581)
at android.view.View.dispatchTouchEvent(View.java:8471)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2369)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1719)
at android.app.Activity.dispatchTouchEvent(Activity.java:2742)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2330)
at android.view.View.dispatchPointerEvent(View.java:8666)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4123)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3989)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3544)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3597)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3563)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3680)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3571)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3737)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3544)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3597)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3563)
at android.view.ViewRootImpl$InputStage.apply(Vi

Hi@keyboardsurfer,

I saw that you experimented this day with Drone.io CI tool. Why did you deleted this branch? If drone.io was not enough good for you, too much complicated, lack in features or ..., please check Travis. I find this CI tool very useful.

Cheers.

Device: Nexus 4
Android version: 5.1.1

06-17 10:09:14.906 29419-29419/com.google.samples.apps.topeka E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.google.samples.apps.topeka, PID: 29419
java.lang.IllegalStateException: Fragment QuizFragment{25fbd5d1} not attached to Activity
at android.app.Fragment.getResources(Fragment.java:788)
at android.app.Fragment.getString(Fragment.java:823)
at com.google.samples.apps.topeka.fragment.QuizFragment.setProgress(QuizFragment.java:119)
at com.google.samples.apps.topeka.fragment.QuizFragment.showNextPage(QuizFragment.java:200)
at com.google.samples.apps.topeka.activity.QuizActivity.submitAnswer(QuizActivity.java:217)
at com.google.samples.apps.topeka.activity.QuizActivity.proceed(QuizActivity.java:212)
at com.google.samples.apps.topeka.widget.quiz.AbsQuizView$3.run(AbsQuizView.java:345)
at android.view.ViewPropertyAnimator$AnimatorEventListener.onAnimationEnd(ViewPropertyAnimator.java:1121)
at android.animation.ValueAnimator.endAnimation(ValueAnimator.java:1171)
at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:722)
at android.animation.ValueAnimator$AnimationHandler.run(ValueAnimator.java:738)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:549)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

UPD. the same issue if press back button right after press press floating action button

Which part of the code I can add more categories? Thanks in advanced

hi,
If I make any change to

categories.json

private static final int DATABASE_VERSION = 1;
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

Hi,

after run an Topeka app on my Genymotion emulator: Samsung S2 - 4.1.1 - API 16, 480x800, 240dpi and played a little I noticed that strange effect:

I think it could be better if this drawable would be whole solid, not with blurred edges.

Cheers

That's my issues:
Error:(23, 27) error: package android.databinding not found
Error:(40, 50) error: package com.google.samples.apps.topeka.databinding not found
Error:(71, 9) error: not found
符号: class ActivityCategorySelectionBinding
位置: class CategorySelectionActivity
Error:(71, 52) error: not found
符号: 变量 DataBindingUtil
位置: class CategorySelectionActivity

All model classes implement Parcelable interface.
In fact "parcelability" of those classes not used anywhere in production code.
It's used only in tests that are testing if those Parcelable classes are being parcelarized correctly.
Why?

Hi,
im sorry this is really bad question.
but how to change the questing and answer?

Thanks

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.google.samples.apps.topeka, PID: 26114
java.lang.NullPointerException: Attempt to invoke a virtual method on a null object reference
at com.google.samples.apps.topeka.helper.PreferencesHelper.writeToPreferences(PreferencesHelper.java:49)
at com.google.samples.apps.topeka.fragment.SignInFragment.savePlayer(SignInFragment.java:238)
at com.google.samples.apps.topeka.fragment.SignInFragment.access$200(SignInFragment.java:48)
at com.google.samples.apps.topeka.fragment.SignInFragment$3.onClick(SignInFragment.java:161)
at android.view.View.performClick(View.java:4820)
at android.view.View$PerformClick.run(View.java:20157)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5576)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)

I wrote a name and last initial, and then clicked the 'choose an avatar' button, and the app crashed:

FATAL EXCEPTION: main
Process: com.google.samples.apps.topeka, PID: 24314
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.google.samples.apps.topeka/com.google.samples.apps.topeka.activity.CategorySelectionActivity}: android.content.res.Resources$NotFoundException: File res/drawable/avatar_1.xml from drawable resource ID #0x7f020000
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2345)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2407)
    at android.app.ActivityThread.access$800(ActivityThread.java:149)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1324)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:211)
    at android.app.ActivityThread.main(ActivityThread.java:5321)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1016)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)
Caused by: android.content.res.Resources$NotFoundException: File res/drawable/avatar_1.xml from drawable resource ID #0x7f020000
    at android.content.res.Resources.loadDrawableForCookie(Resources.java:2648)
    at android.content.res.Resources.loadDrawable(Resources.java:2525)
    at android.content.res.Resources.getDrawable(Resources.java:799)
    at android.content.Context.getDrawable(Context.java:402)
    at com.google.samples.apps.topeka.activity.CategorySelectionActivity.setUpToolbar(CategorySelectionActivity.java:81)
    at com.google.samples.apps.topeka.activity.CategorySelectionActivity.onCreate(CategorySelectionActivity.java:59)
    at android.app.Activity.performCreate(Activity.java:5933)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
    ... 10 more
Caused by: java.lang.NumberFormatException: Invalid float: ".2.1"
    at java.lang.StringToReal.invalidReal(StringToReal.java:63)
    at java.lang.StringToReal.initialParse(StringToReal.java:160)
    at java.lang.StringToReal.parseFloat(StringToReal.java:323)
    at java.lang.Float.parseFloat(Float.java:306)
    at android.util.PathParser.getFloats(PathParser.java:178)
    at android.util.PathParser.createNodesFromPathData(PathParser.java:59)
    at android.graphics.drawable.VectorDrawable$VFullPath.updateStateFromTypedArray(VectorDrawable.java:1439)
    at android.graphics.drawable.VectorDrawable$VFullPath.inflate(VectorDrawable.java:1421)
    at android.graphics.drawable.VectorDrawable.inflateInternal(VectorDrawable.java:542)
    at android.graphics.drawable.VectorDrawable.inflate(VectorDrawable.java:458)
    at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:1126)
    at android.graphics.drawable.Drawable.createFromXml(Drawable.java:1033)
    at android.content.res.Resources.loadDrawableForCookie(Resources.java:2638)
    ... 18 more

I'm using a Sony Xperia Z3 Compact, with Android 5.0. Let me know if I can provide any more information.

Whether can be down more compatible version

transitionAnimationScale, windowAnimationScale, animatorDuration scale are always 0, regardless of what the actual settings are.

Tested on real device on M (5x), emulator on L + M

p.s. huge fan of your twitter table flipping

edit 2: found the source of the problem: if the animation settings have never been touched, Settings.Global.getFloat(resolver, setting) will trigger SettingNotFoundException. The rule works fine after any of the animation settings are changed at least once. Any solution to this?