将分页库从 3.0.0-alpha10 更新到 3.0.0-alpha12 时出现运行时错误

问题描述

我用 paging 3.0.0-alpha10 创建了我的 pagingSource 类并且它起作用了，但是当我将版本更改为 3.0.0-alpha12 时， 我收到这个错误 这是运行时异常：

java.lang.AbstractMethodError: abstract method "java.lang.Object androidx.paging.PagingDataDiffer.presentNewList(androidx.paging.NullPaddedList,androidx.paging.NullPaddedList,androidx.paging.CombinedLoadStates,int,kotlin.jvm.functions.Function0,kotlin.coroutines.Continuation)"
        at androidx.paging.PagingDataDiffer$collectFrom$2$invokeSuspend$$inlined$collect$1$lambda$1.invokeSuspend(PagingDataDiffer.kt:136)
        at androidx.paging.PagingDataDiffer$collectFrom$2$invokeSuspend$$inlined$collect$1$lambda$1.invoke(UnkNown Source:10)
        at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:91)
        at kotlinx.coroutines.BuildersKt__Builders_commonKt.withContext(Builders.common.kt:161)
        at kotlinx.coroutines.BuildersKt.withContext(UnkNown Source:1)
        at androidx.paging.PagingDataDiffer$collectFrom$2$invokeSuspend$$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$1.invokeSuspend(UnkNown Source:11)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.dispatchedTask.run(dispatchedTask.kt:106)
        at kotlinx.coroutines.EventLoop.processUnconfinedEvent(EventLoop.common.kt:69)
        at kotlinx.coroutines.dispatchedTaskKt.resumeUnconfined(dispatchedTask.kt:236)
        at kotlinx.coroutines.dispatchedTaskKt.dispatch(dispatchedTask.kt:161)
        at kotlinx.coroutines.CancellableContinuationImpl.dispatchResume(CancellableContinuationImpl.kt:362)
        at kotlinx.coroutines.CancellableContinuationImpl.completeResume(CancellableContinuationImpl.kt:479)
        at kotlinx.coroutines.channels.AbstractChannel$ReceiveElement.completeResumeReceive(AbstractChannel.kt:899)
        at kotlinx.coroutines.channels.ArrayChannel.offerInternal(ArrayChannel.kt:84)
        at kotlinx.coroutines.channels.AbstractSendChannel.send(AbstractChannel.kt:135)
        at androidx.paging.PageFetcherSnapshot.doInitialLoad(PageFetcherSnapshot.kt:315)
        at androidx.paging.PageFetcherSnapshot$doInitialLoad$1.invokeSuspend(UnkNown Source:11)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.dispatchedTask.run(dispatchedTask.kt:106)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6543)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:440)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:810)

这是我的 PaginSource：

import androidx.paging.PagingSource
import com.example.template.api.MyApi
import com.example.template.api.responses.ChatHistoryResponse
import retrofit2.HttpException
import java.io.IOException

class ChatHistoryPagingSource
constructor(
    private val myApi: MyApi,private val search: String,private val type: String,private val token: String,private val status: String,): PagingSource<Int,ChatHistoryResponse>() {

    override suspend fun load(params: LoadParams<Int>): LoadResult<Int,ChatHistoryResponse> {
        val position = params.key ?: 1
        return try {
            val response = myApi.chatHistoryList(token,status,position,20,type,search)
            LoadResult.Page(
                data = response,prevKey = if (position == 1) null else position -1,nextKey = if (response.isEmpty()) null else position +1
            )

        } catch (exception: IOException) {
            LoadResult.Error(exception)
        } catch (exception: HttpException) {
            LoadResult.Error(exception)
        }
    }

}

它在以前的版本中完全有效，但我必须迁移到新版本。

解决方法

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