Fixed
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Comments
du...@google.com
我也遇到了，RecycleView数据太多，就滚动不到指定太远的位置
ap...@google.com
Also adding that I notice a crash while repro-ing this:
2021-01-25 11:47:32.315 17990-17990/paging.android.example.com.pagingsample E/AndroidRuntime: FATAL EXCEPTION: main
Process: paging.android.example.com.pagingsample, PID: 17990
java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
at java.util.ArrayList.get(ArrayList.java:437)
at androidx.paging.PageFetcherSnapshot.doLoad(PageFetcherSnapshot.kt:370)
at androidx.paging.PageFetcherSnapshot$collectAsGenerationalViewportHints$$inlined$collect$1.emit(Collect.kt:133)
at kotlinx.coroutines.flow.FlowKt__ChannelsKt.emitAllImpl$FlowKt__ChannelsKt(Channels.kt:61)
at kotlinx.coroutines.flow.FlowKt__ChannelsKt$emitAllImpl$1.invokeSuspend(Unknown Source:11)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7660)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
2021-01-25 11:47:32.501 14519-14615/com.google.android.googlequicksearchbox E/MDD: DownloadProgressMonitor: Can't find file for uri: android://com.google.android.googlequicksearchbox/files/sharedminusonemodule/shared/SharedMinusOneData.pb.tmp
2021-01-25 11:48:08.376 2197-9975/com.android.phone E/PhoneInterfaceManager: [PhoneIntfMgr] getCarrierPrivilegeStatus: Invalid subId
2021-01-25 11:48:28.470 914-914/? E/BatteryDefender: Failed to read /sys/class/power_supply/wireless/online
Description
We'd like to avoid insertSeparators reliance on filtering empty pages to simplify rest of pageIndex handling internally.
One idea for this is to have a separate internal Page type for separators that includes which source page indices it's dependent on, and if any of those are removed we can also remove the separator page.
Another implication of this is that originalPageOffsetFirst / Last in ViewportHint is incorrect when the last / first page is empty due and gets filtered out by insertSeparators.