Hi,

I think I found another issue:

I have a grid layout with variable size cards. If the first card in the last line is bigger than the rest it is cut off. Also I can't scroll back to the top in this case.

The layout item is completely displayed if I first scroll down and then turn the display (probably repainting the view)

Edit: I am using the width-based version of the grid layout. Edit 2: If I scroll fast enough I will get the complete item visible

hi and thanks for your good library. I have a long recycle view that contain header simple text view and footers of it. however at the first it has no problem and works. but when i become to near the end of list it crashes with below message: 09-29 22:34:35.783 6065-6065/com.neganet.tst_superslim E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.neganet.tst_superslim, PID: 6065 java.lang.IllegalArgumentException: Scrapped or attached views may not be recycled. isScrap:false isAttached:true at android.support.v7.widget.RecyclerView$Recycler.recycleViewHolderInternal(RecyclerView.java:4243) at android.support.v7.widget.RecyclerView$Recycler.recycleView(RecyclerView.java:4193) at com.tonicartos.superslim.LayoutState.recycleCache(LayoutState.java:56) at com.tonicartos.superslim.LayoutManager.scrollVerticallyBy(LayoutManager.java:379) at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:3458) at android.view.Choreographer$CallbackRecord.run(Choreographer.java) at android.view.Choreographer.doCallbacks(Choreographer.java) at android.view.Choreographer.doFrame(Choreographer.java) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java) at android.os.Handler.handleCallback(Handler.java) at android.os.Handler.dispatchMessage(Handler.java) at android.os.Looper.loop(Looper.java) at android.app.ActivityThread.main(ActivityThread.java) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java) and at some shorter lists, at the end of list it stops and when try to scroll to up of the list it crashes with below message: 09-29 22:51:52.861 20513-20513/? E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.neganet.tst_superslim, PID: 20513 java.lang.StackOverflowError: stack size 8MB at android.support.v7.widget.ChildHelper.getOffset(ChildHelper.java:93) at android.support.v7.widget.ChildHelper.getChildAt(ChildHelper.java:156) at android.support.v7.widget.RecyclerView$LayoutManager.getChildAt(RecyclerView.java:6023) at com.tonicartos.superslim.LayoutManager.getAnchorAtStart(LayoutManager.java:1057) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:772) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.superslim.LayoutManager.fillNextSectionToStart(LayoutManager.java:825) at com.tonicartos.s 09-29 22:51:52.868 20513-20533/? I/art﹕ Background sticky concurrent mark sweep GC freed 40034(4MB) AllocSpace objects, 0(0B) LOS objects, 0% free, 73MB/73MB, paused 36.328ms total 66.022ms 09-29 22:51:53.353 20513-20528/? W/art﹕ Suspending all threads took: 12.977ms 09-29 22:51:53.360 20513-20513/? E/JavaBinder﹕ !!! FAILED BINDER TRANSACTION !!! 09-29 22:51:53.361 20513-20513/? E/AndroidRuntime﹕ Error reporting crash android.os.TransactionTooLargeException at android.os.BinderProxy.transactNative(Native Method) at android.os.BinderProxy.transact(Binder.java) at android.app.ActivityManagerProxy.handleApplicationCrash(ActivityManagerNative.java) at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java) at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693) at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690) 09-29 22:51:53.361 20513-20513/? I/Process﹕ Sending signal. PID: 20513 SIG: 9 what is the reason of that issue? how can i Fix it

at android.support.v7.widget.RecyclerView$Recycler.recycleViewHolderInternal(RecyclerView.java:4243) at android.support.v7.widget.RecyclerView$Recycler.recycleView(RecyclerView.java:4193) at com.tonicartos.superslim.LayoutState.recycleCache(LayoutState.java:52) at com.tonicartos.superslim.LayoutManager.scrollVerticallyBy(LayoutManager.java:367) at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:3458) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:777) at android.view.Choreographer.doCallbacks(Choreographer.java:590) at android.view.Choreographer.doFrame(Choreographer.java:559) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:763) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main(ActivityThread.java:5834) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)

Hi again!

I found another issue: Sticky headers are somehow displayed below my cards. this may have something to do with the elevation level of a card on Android 5, but I am really not sure.. Could you have a look at it and make sure that headers are always on top? (telling me what may be wrong is also an option ;) )

The following stack trace occurs if I try to use the layoutManagers.findFirstCompletelyVisibleItemPosition to obtain the position of the first item on the screen.

java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.ViewGroup$LayoutParams android.view.View.getLayoutParams()' on a null object reference at android.support.v7.widget.RecyclerView$LayoutManager.getPosition(RecyclerView.java:5017) at com.tonicartos.superslim.LayoutManager.findFirstCompletelyVisibleItemPosition(LayoutManager.java:139)

I do not get a NPE if I switch the call to layoutManager.findFirstVisibleItemPosition().

I can use the later as a work around to obtain the position, but the former is preferable.

This is with version 4.12 of SuperSLiM.

Stack Trace

0 java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.ViewGroup$LayoutParams android.view.View.getLayoutParams()' on a null object reference 1 at com.tonicartos.superslim.LayoutManager.getAnchorAtEnd(SourceFile:1038) 2 at com.tonicartos.superslim.LayoutManager.fillNextSectionToEnd(SourceFile:725) 3 at com.tonicartos.superslim.LayoutManager.layoutChildren(SourceFile:3369) 4 onLayoutChildren 5 at android.support.v7.widget.RecyclerView.dispatchLayout(SourceFile:2847) 6 at android.support.v7.widget.RecyclerView.resumeRequestLayout(SourceFile:1599) 7 at android.support.v7.widget.RecyclerView$1.run(SourceFile:277) 8 at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 9 at android.view.Choreographer.doCallbacks(Choreographer.java:580) 10 at android.view.Choreographer.doFrame(Choreographer.java:549) 11 at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 12 at android.os.Handler.handleCallback(Handler.java:739) 13 at android.os.Handler.dispatchMessage(Handler.java:95) 14 at android.os.Looper.loop(Looper.java:135) 15 at android.app.ActivityThread.main(ActivityThread.java:5292) 16 at java.lang.reflect.Method.invoke(Native Method) 17 at java.lang.reflect.Method.invoke(Method.java:372) 18 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) 19 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)

Threads

Thread: pool-3-thread-1 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: Chrome_IOThread

Thread: fifo-pool-thread-0 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818) 10 at com.bumptech.glide.load.engine.executor.FifoPriorityThreadPoolExecutor$DefaultThreadFactory$1.run(SourceFile:118)

Thread: Chrome_FileUserBlockingThread

Thread: hwuiTask1

Thread: RenderThread

Thread: Signal Catcher

Thread: AsyncTask #2 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: Thread-9928

Thread: Thread-9929

Thread: Binder_2

Thread: HeapTrimmerDaemon 0 at dalvik.system.VMRuntime.trimHeap(Native Method) 1 at java.lang.Daemons$HeapTrimmerDaemon.run(Daemons.java:313) 2 at java.lang.Thread.run(Thread.java:818)

Thread: FinalizerDaemon 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Object.wait(Object.java:422) 2 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:101) 3 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:72) 4 at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:174) 5 at java.lang.Thread.run(Thread.java:818)

Thread: OPTMZ 0 at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method) 1 at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:318) 2 at com.android.okhttp.Connection.upgradeToTls(Connection.java:201) 3 at com.android.okhttp.Connection.connect(Connection.java:155) 4 at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:276) 5 at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211) 6 at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:382) 7 at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:106) 8 at com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:217) 9 at com.android.okhttp.internal.http.DelegatingHttpsURLConnection.getOutputStream(DelegatingHttpsURLConnection.java:218) 10 at com.android.okhttp.internal.http.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:25) 11 at crittercism.android.h.a(Unknown Source) 12 a 13 a 14 at crittercism.android.h.run(Unknown Source) 15 at crittercism.android.cy.a(Unknown Source) 16 at crittercism.android.dc.run(Unknown Source) 17 at java.lang.Thread.run(Thread.java:818)

Thread: Thread-9925

Thread: fifo-pool-thread-1 0 at com.android.org.conscrypt.NativeCrypto.SSL_read(Native Method) 1 at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.read(OpenSSLSocketImpl.java:699) 2 at crittercism.android.n.read(Unknown Source) 3 read 4 read 5 at com.android.okio.Okio$2.read(Okio.java:113) 6 at com.android.okio.RealBufferedSource.read(RealBufferedSource.java:48) 7 at com.android.okhttp.internal.http.HttpConnection$FixedLengthSource.read(HttpConnection.java:446) 8 at com.android.okio.RealBufferedSource$1.read(RealBufferedSource.java:168) 9 at java.io.FilterInputStream.read(FilterInputStream.java:118) 10 at com.bumptech.glide.util.ContentLengthInputStream.read(SourceFile:65) 11 at com.bumptech.glide.util.ContentLengthInputStream.read(SourceFile:60) 12 at com.bumptech.glide.load.resource.bitmap.RecyclableBufferedInputStream.fillbuf(SourceFile:132) 13 at com.bumptech.glide.load.resource.bitmap.RecyclableBufferedInputStream.read(SourceFile:309) 14 at java.io.InputStream.read(InputStream.java:162) 15 at com.bumptech.glide.load.resource.bitmap.RecyclableBufferedInputStream.fillbuf(SourceFile:132) 16 at com.bumptech.glide.load.resource.bitmap.RecyclableBufferedInputStream.read(SourceFile:309) 17 at com.bumptech.glide.util.ExceptionCatchingInputStream.read(SourceFile:84) 18 at java.io.FilterInputStream.read(FilterInputStream.java:118) 19 at com.bumptech.glide.util.MarkEnforcingInputStream.read(SourceFile:44) 20 at android.graphics.BitmapFactory.nativeDecodeStream(Native Method) 21 at android.graphics.BitmapFactory.decodeStreamInternal(BitmapFactory.java:635) 22 at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:611) 23 at com.bumptech.glide.load.resource.bitmap.Downsampler.getSampleSize(SourceFile:329) 24 decodeStream 25 at com.bumptech.glide.load.resource.bitmap.Downsampler.downsampleWithSize(SourceFile:2220) 26 decode 27 getSampleSize 28 at com.bumptech.glide.load.resource.bitmap.StreamBitmapDecoder.decode(SourceFile:1050) 29 decode 30 at com.bumptech.glide.load.resource.bitmap.ImageVideoBitmapDecoder.decode(SourceFile:39) 31 at com.bumptech.glide.load.resource.bitmap.ImageVideoBitmapDecoder.decode(SourceFile:20) 32 at com.bumptech.glide.load.resource.gifbitmap.GifBitmapWrapperResourceDecoder.decodeBitmapWrapper(SourceFile:121) 33 at com.bumptech.glide.load.resource.gifbitmap.GifBitmapWrapperResourceDecoder.decodeStream(SourceFile:1094) 34 decode 35 decode 36 at com.bumptech.glide.load.resource.gifbitmap.GifBitmapWrapperResourceDecoder.decode(SourceFile:22) 37 at com.bumptech.glide.load.engine.DecodeJob.decodeFromSourceData(SourceFile:2190) 38 decodeSource 39 at com.bumptech.glide.load.engine.DecodeJob.decodeFromSource(SourceFile:128) 40 at com.bumptech.glide.load.engine.EngineRunnable.decodeFromSource(SourceFile:1122) 41 decode 42 run 43 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422) 44 at java.util.concurrent.FutureTask.run(FutureTask.java:237) 45 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 46 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 47 at java.lang.Thread.run(Thread.java:818) 48 at com.bumptech.glide.load.engine.executor.FifoPriorityThreadPoolExecutor$DefaultThreadFactory$1.run(SourceFile:118)

Thread: Binder_1

Thread: OkHttp ConnectionPool 0 at java.lang.Object.wait(Native Method) 1 at com.squareup.okhttp.ConnectionPool.performCleanup(SourceFile:304) 2 at com.squareup.okhttp.ConnectionPool.runCleanupUntilPoolIsEmpty(SourceFile:241) 3 at com.squareup.okhttp.ConnectionPool.access$000(SourceFile:54) 4 at com.squareup.okhttp.ConnectionPool$1.run(SourceFile:97) 5 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 6 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 7 at java.lang.Thread.run(Thread.java:818)

Thread: Thread-9930

Thread: ReferenceQueueDaemon 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:134) 2 at java.lang.Thread.run(Thread.java:818)

Thread: GCDaemon 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Daemons$GCDaemon.run(Daemons.java:344) 2 at java.lang.Thread.run(Thread.java:818)

Thread: Thread-9891 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:197) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2055) 5 at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1060) 6 at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:776) 7 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 8 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 9 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 10 at crittercism.android.cy.a(Unknown Source) 11 at crittercism.android.dc.run(Unknown Source) 12 at java.lang.Thread.run(Thread.java:818)

Thread: Chrome_FileThread

Thread: AsyncTask #3 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: AsyncTask #4 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: fifo-pool-thread-3 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818) 10 at com.bumptech.glide.load.engine.executor.FifoPriorityThreadPoolExecutor$DefaultThreadFactory$1.run(SourceFile:118)

Thread: Chrome_CacheThread

Thread: OkHttp ConnectionPool 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:197) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2055) 5 at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:435) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: Okio Watchdog 0 at java.lang.Object.wait(Native Method) 1 at okio.AsyncTimeout.awaitTimeout(SourceFile:297) 2 at okio.AsyncTimeout.access$000(SourceFile:40) 3 at okio.AsyncTimeout$Watchdog.run(SourceFile:272)

Thread: fifo-pool-thread-2 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818) 10 at com.bumptech.glide.load.engine.executor.FifoPriorityThreadPoolExecutor$DefaultThreadFactory$1.run(SourceFile:118)

Thread: pool-2-thread-1 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: FinalizerWatchdogDaemon 0 at java.lang.Thread.sleep(Native Method) 1 at java.lang.Thread.sleep(Thread.java:1031) 2 at java.lang.Thread.sleep(Thread.java:985) 3 at java.lang.Daemons$FinalizerWatchdogDaemon.sleepFor(Daemons.java:258) 4 at java.lang.Daemons$FinalizerWatchdogDaemon.waitForFinalization(Daemons.java:269) 5 at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:217) 6 at java.lang.Thread.run(Thread.java:818)

Thread: AsyncTask #5 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: Chrome_ProcessLauncherThread

Thread: fifo-pool-thread-0 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818) 10 at com.bumptech.glide.load.engine.executor.FifoPriorityThreadPoolExecutor$DefaultThreadFactory$1.run(SourceFile:118)

Thread: Thread-9897 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at crittercism.android.cy.a(Unknown Source) 10 at crittercism.android.dc.run(Unknown Source) 11 at java.lang.Thread.run(Thread.java:818)

Thread: pool-4-thread-1 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: cr.CleanupReference 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Object.wait(Object.java:422) 2 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:101) 3 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:72) 4 at org.chromium.content.common.CleanupReference$1.run(CleanupReference.java:51)

Thread: hwuiTask2

Thread: Binder_3

Thread: AsyncTask #1 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: Chrome_DBThread

Thread: pool-5-thread-1 0 at java.lang.Object.wait(Native Method) 1 at java.lang.Thread.parkFor(Thread.java:1220) 2 at sun.misc.Unsafe.park(Unsafe.java:299) 3 at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 4 at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016) 5 at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410) 6 at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035) 7 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097) 8 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 9 at java.lang.Thread.run(Thread.java:818)

Thread: Thread-9924

Thread: Thread-9926

Thread: TXN Thread 0 at java.lang.Object.wait(Native Method) 1 at android.os.ConditionVariable.block(ConditionVariable.java:97) 2 at crittercism.android.ba.a(Unknown Source) 3 a 4 at crittercism.android.dc.run(Unknown Source) 5 at crittercism.android.cy.a(Unknown Source) 6 at crittercism.android.dc.run(Unknown Source) 7 at java.lang.Thread.run(Thread.java:818)

Hi!

first of all: a nice library. A bit hard to setup, but the result is amazing!

I have a little issue: The GridSectionLayoutManager ignores the margin on my layouts.

I have some CardViews that use a layout_margin of 8dp in the topmost view. The default layoutmanagers in the RecyclerView support library recognize this margin and render the views accordingly. However your manager requires another view wrapped around it to make the margin visible.

If notifyDataSetChanged() is called when the user has scrolled to the end of a long list, and several rows at the end of the list have been removed, the new list is laid-out improperly. You get a list that is scrolled past the end, presenting just white space. You can drag-down on the white space area and the tail-end of the list scrolls back into view.

The Android LinearLayoutManager handles this case by scrolling the list back to the first position, which isn't ideal, but it is better than scrolled past the (new) end.

I am getting index out of bounds exception when I sometimes update the recycler view. All I am doing is

1. Replacing the dataset in the recycler adapter
2. Calling notifyDataSetChanged();

My getItemCount returns just returns the count of the dataset.

I am not sure if there is a bug in my code or not. I only started noticing this issue after around 0.4.4 (or some other release near that). Here is the crash log. I am using the latest version 0.4.7.

java.lang.IndexOutOfBoundsException: Invalid item position 12(12). Item count:12 at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3614) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:3609) at com.tonicartos.superslim.LayoutState.getView(LayoutState.java:44) at com.tonicartos.superslim.LayoutManager.layoutChildren(LayoutManager.java:1306) at com.tonicartos.superslim.LayoutManager.onLayoutChildren(LayoutManager.java:262) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2118) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:2415) 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.support.v4.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:561) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1594) 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.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:907) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1076) 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:2086) 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(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Method.java) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Using the the 0.4.5 release. This is happening for some of our users, but unfortunately we are unable to reproduce it, so it's hard to say why it's happening. All reports are coming from devices running KitKat (4.4.2 and 4.4.4) and this apparently happens upon loading the activity (or shortly thereafter?).

This stack trace closely resembles https://github.com/TonicArtos/SuperSLiM/issues/4, but we're obviously using a more recent version.

I will update this issue as soon as I can find more useful information (sorry it's so vague!), but I thought I'd report it in the meantime in case anyone has ideas.

java.lang.NullPointerException at android.support.v7.widget.RecyclerView$LayoutManager.getPosition(SourceFile:5017) at com.tonicartos.superslim.LayoutManager.computeVerticalScrollOffset(SourceFile:555) at android.support.v7.widget.RecyclerView.computeVerticalScrollOffset(SourceFile:1115) at android.view.View.canScrollVertically(View.java:12016) at android.support.v4.view.ViewCompatICS.canScrollVertically(SourceFile:34) at android.support.v4.view.ViewCompat$ICSViewCompatImpl.canScrollVertically(SourceFile:907) at android.support.v4.view.ViewCompat.canScrollVertically(SourceFile:1192) at android.support.v7.widget.RecyclerView$LayoutManager.onInitializeAccessibilityEvent(SourceFile:6301) at android.support.v7.widget.RecyclerViewAccessibilityDelegate.onInitializeAccessibilityEvent(SourceFile:66) at android.support.v4.view.AccessibilityDelegateCompat$AccessibilityDelegateJellyBeanImpl$1.onInitializeAccessibilityEvent(SourceFile:228) at android.support.v4.view.AccessibilityDelegateCompatJellyBean$1.onInitializeAccessibilityEvent(SourceFile:56) at android.view.View.onInitializeAccessibilityEvent(View.java:5204) at android.view.View.sendAccessibilityEventUncheckedInternal(View.java:5077) at android.view.View$AccessibilityDelegate.sendAccessibilityEventUnchecked(View.java:19417) at android.support.v4.view.AccessibilityDelegateCompatIcs.sendAccessibilityEventUnchecked(SourceFile:117) at android.support.v4.view.AccessibilityDelegateCompat$AccessibilityDelegateIcsImpl.sendAccessibilityEventUnchecked(SourceFile:210) at android.support.v4.view.AccessibilityDelegateCompat.sendAccessibilityEventUnchecked(SourceFile:358) at android.support.v4.view.AccessibilityDelegateCompat$AccessibilityDelegateJellyBeanImpl$1.sendAccessibilityEventUnchecked(SourceFile:255) at android.support.v4.view.AccessibilityDelegateCompatJellyBean$1.sendAccessibilityEventUnchecked(SourceFile:82) at android.view.View.sendAccessibilityEventUnchecked(View.java:5062) at android.view.ViewRootImpl$SendWindowContentChangedAccessibilityEvent.run(ViewRootImpl.java:6615) at android.view.ViewRootImpl$SendWindowContentChangedAccessibilityEvent.runOrPost(ViewRootImpl.java:6641) at android.view.ViewRootImpl.postSendWindowContentChangedCallback(ViewRootImpl.java:5876) at android.view.ViewRootImpl.notifySubtreeAccessibilityStateChanged(ViewRootImpl.java:5949) at android.view.ViewGroup.notifySubtreeAccessibilityStateChanged(ViewGroup.java:2539) at android.view.ViewGroup.notifySubtreeAccessibilityStateChanged(ViewGroup.java:2539) at android.view.ViewGroup.notifySubtreeAccessibilityStateChanged(ViewGroup.java:2539) at android.view.ViewGroup.notifySubtreeAccessibilityStateChanged(ViewGroup.java:2539) at android.view.ViewGroup.notifySubtreeAccessibilityStateChanged(ViewGroup.java:2539) at android.view.View.notifySubtreeAccessibilityStateChangedIfNeeded(View.java:7434) at android.view.View.setFrame(View.java:15057) at android.view.View.layout(View.java:14944) at android.view.ViewGroup.layout(ViewGroup.java:4631) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) at android.widget.FrameLayout.onLayout(FrameLayout.java:388) at android.view.View.layout(View.java:14948) at android.view.ViewGroup.layout(ViewGroup.java:4631) at android.support.v4.view.ViewPager.onLayout(SourceFile:1594) at android.view.View.layout(View.java:14948) at android.view.ViewGroup.layout(ViewGroup.java:4631) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) at android.widget.FrameLayout.onLayout(FrameLayout.java:388) at android.view.View.layout(View.java:14948) at android.view.ViewGroup.layout(ViewGroup.java:4631) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525) at android.widget.LinearLayout.onLayout(LinearLayout.java:1434) at android.view.View.layout(View.java:14948) at android.view.ViewGroup.layout(ViewGroup.java:4631) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) at android.widget.FrameLayout.onLayout(FrameLayout.java:388) at android.view.View.layout(View.java:14948) at android.view.ViewGroup.layout(ViewGroup.java:4631) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1987) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1744) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5610) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761) at android.view.Choreographer.doCallbacks(Choreographer.java:574) at android.view.Choreographer.doFrame(Choreographer.java:544) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747) at android.os.Handler.handleCallback(Handler.java:733) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:212) at android.app.ActivityThread.main(ActivityThread.java:5137) at java.lang.reflect.Method.invokeNative(Method.java) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718) at dalvik.system.NativeStart.main(NativeStart.java)

I'd like to discuss the initialization process. Right now, the initialization code for SuperSLiM is a bit verbose:

layoutManager = new LayoutManager();
headerManager = new LinearSectionLayoutManager(layoutManager);
layoutManager.registerSectionLayoutManager(0, headerManager);
gridManager = new GridSectionLayoutManager(layoutManager, getActivity());
gridManager.setNumColumns(3);
layoutManager.registerSectionLayoutManager(1, gridManager);
recyclerView.setLayoutManager(layoutManager);

We currently have to initialize the all SLM's (including the default SLM's) ourselves, keep track of the index and correctly match these in our view binding/xml.

I would love to be able to do something like:

layoutManager = LayoutManager.enableLinearSLM().enableGridSLM(context, 3).addCustomSLM(new MySLM()).build()
recyclerView.setLayoutManager(layoutManager);

We could then use some sort of tag so then

final LayoutManager.LayoutParams lp = (LayoutManager.LayoutParams) holder.itemView.getLayoutParams();
lp.sectionManager = 0

would become something like

lp.setSLM(LinearSLM.tag)

I'm not sure how this would work via XML, but this shows exactly what SLM is being used without having to switch from your adapter to recyclerview implementation to match up ids.

When you use this library with a RecyclerView that sits inside a swipe to refresh layout, or any other layout that handles vertical scrolling (i.e. a bottom sheet behavior), if you scroll up the list to the top and keep going, it will trigger the swipe to refresh or the bottom sheet dragging BEFORE the RecyclerView reaches the top of the list, so before it gets to the first header.

This issue seems to go away if I don't use the library, in both scenarios.

Hi,

I cannot find a license for this project here on GitHub. I would like to ask if there is one. There seems to be a project page here: https://tonicartos.nz/SuperSLiM/ in which you say that this is covered by the Apache 2.0 License. Is that correct. If so, would you mind adding the license file to the GitHub repo too? Thank you in advance.

Kind regards, Rafael

This is NPE crash log

--------- beginning of crash 06-25 19:54:19.959 4842 4842 E AndroidRuntime: FATAL EXCEPTION: main 06-25 19:54:19.959 4842 4842 E AndroidRuntime: Process: jp.naver.line.android, PID: 4842 06-25 19:54:19.959 4842 4842 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.ViewGroup$LayoutParams android.view.View.getLayoutParams()' on a null object reference 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.RecyclerView$LayoutManager.getPosition(RecyclerView.java:8294) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at com.linecorp.linekeep.opensrc.com.tonicartos.superslim.LayoutManager.onItemsUpdated(LayoutManager.java:545) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.RecyclerView$LayoutManager.onItemsUpdated(RecyclerView.java:9728) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.RecyclerView$6.dispatchUpdate(RecyclerView.java:943) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.RecyclerView$6.onDispatchFirstPass(RecyclerView.java:931) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.AdapterHelper.dispatchFirstPassAndUpdateViewHolders(AdapterHelper.java:314) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.AdapterHelper.dispatchAndUpdateViewHolders(AdapterHelper.java:300) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.AdapterHelper.applyUpdate(AdapterHelper.java:220) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.AdapterHelper.preProcess(AdapterHelper.java:104) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1753) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.support.v7.widget.RecyclerView$1.run(RecyclerView.java:356) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.view.Choreographer$CallbackRecord.run(Choreographer.java:930) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.view.Choreographer.doCallbacks(Choreographer.java:705) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.view.Choreographer.doFrame(Choreographer.java:637) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:916) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:751) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.os.Looper.loop(Looper.java:154) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6823) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1557) 06-25 19:54:19.959 4842 4842 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)

It looks like getChildAt(0) sometimes return null. Do we need to handle NPE here?

    @Override
    public void onItemsUpdated(RecyclerView recyclerView, int positionStart, int itemCount) {
        super.onItemsUpdated(recyclerView, positionStart, itemCount);

        View first = getChildAt(0);
        View last = getChildAt(getChildCount() - 1);
        if (positionStart + itemCount <= getPosition(first)) {
            return;
        }

        if (positionStart <= getPosition(last)) {
            requestLayout();
        }
    }

org.gradle.api.ProjectConfigurationException: A problem occurred configuring project ':library'.

Caused by: java.lang.NoSuchMethodError: com.android.build.gradle.internal.variant.BaseVariantData.getOutputs()Ljava/util/List;