我在我的应用程序中使用rxJava。而且我经常使用这样的代码：
couponListInteractor.getObservableData(storeId)
.subscribe(data ->
data.forEach(item ->
{
if (!couponsCode.contains(item.getCode()))
{
couponsCode.add(item.getCode());
}
}
);
当我在我的模拟器中开发应用程序时，一切都很好。但是当我开始在设备中测试我的应用程序（4.0 android版本）。我得到了一些错误。
FATAL EXCEPTION: RxNewThreadScheduler-1
Process: com.mrrebates.cashback, PID: 20428
java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.Worker thread.
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:59)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NoClassDefFoundError: com.couponautoapplier.cashback.model.api.apistorage.DataConfigApiStorage$1$$Lambda$1
at com.couponautoapplier.cashback.model.api.apistorage.DataConfigApiStorage$1.call(DataConfigApiStorage.java:50)
at com.couponautoapplier.cashback.model.api.apistorage.DataConfigApiStorage$1.call(DataConfigApiStorage.java:28)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:41)
at retrofit2.adapter.rxjava.OperatorMapResponseToBodyOrError$1.onNext(OperatorMapResponseToBodyOrError.java:38)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:173)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)
at rx.Subscriber.setProducer(Subscriber.java:205)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:152)
at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$CallOnSubscribe.call(RxJavaCallAdapterFactory.java:138)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10200)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
at rx.Observable.unsafeSubscribe(Observable.java:10200)
at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)
我很容易纠正此错误：
couponListInteractor.getObservableData(storeId)
.subscribe(data -> {
for(CouponListItemViewModel item: data)
{
if(!couponsCode.contains(item.getCode()))
{
couponsCode.add(item.getCode());
}
}
});
我是否必须更正到处纠正？
我不想这样做，因为它看起来很漂亮：
couponsCode.forEach(value -> couponsCodes.add(new CouponsCode(value)));
答案 0 :(得分：4)
问题是您在低于24的API级别使用Java 8的For Each row As DataGridViewRow In dgvLosshours.Rows
If (row.Cells("losshrs").Value = "") Then
MsgBox("Losshours can't Empty", MsgBoxStyle.Critical)
Return
Else
Dim i As Integer = 0
Dim hd As Integer = row.Cells("headcount").Value * row.Cells("workhrs").Value - row.Cells("losshrs").Value
Dim cmd1 As New MySqlCommand
Dim mydt1 As New DataSet
Dim myadapt1 As New MySqlDataAdapter
openConnectionsMySQL()
cmd1 = New MySqlCommand("select * from whweek where periode = date_format(NOW(), '%m-%Y') ", connectMySQL)
myadapt1 = New MySqlDataAdapter(cmd1)
myadapt1.Fill(mydt1, "list")
connectMySQL.Dispose()
If (mydt1.Tables(0).Rows.Count = 19) Then
Dim c As String = "Update whweek losshours : " & row.Cells("losshrs").Value & ", RegularHours :" & hd
With dgvLosshours
dt = ctrl.ActionQuery("update whweek set workhrs = '" & row.Cells("workhrs").Value & "', losshours = '" & _
row.Cells("losshrs").Value & "', reghrs = '" & hd & "', Ke = '" & _
row.Cells("edate").Value & "', modifyby = '" & frmMenu.toolempno.Text & _
"', modifyon = '" & today & "' where CodeDept = '" & _
row.Cells("dept").Value & "' and class = '" & row.Cells("class").Value & "' ")
dt = ctrl.ActionQuery("INSERT INTO log (EmpNo, Tanggal, Ket) VALUES ('" & frmMenu.toolempno.Text & "', '" & today & "', '" & c & "')")
End With
MsgBox("LossHours had been updated!")
dgvLosshours.Rows.Clear()
ElseIf (mydt1.Tables(0).Rows.Count = 0) Then
Dim hd1 As Integer = row.Cells("headcount").Value * row.Cells("workhrs").Value - row.Cells("losshrs").Value
Dim c As String = "Add LossHrs By :" & frmMenu.toolempno.Text & " Period : " & period
dt = ctrl.ActionQuery("insert into whweek(codedept, class, workhrs, losshours, reghrs, Dari, Ke, createby, createon) values('" & _
row.Cells("dept").Value & _
"','" & row.Cells("class").Value & _
"','" & row.Cells("workhrs").Value & _
"','" & row.Cells("losshrs").Value & _
"','" & hd1 & "','" & _
row.Cells("sdate").Value & "', '" & _
row.Cells("edate").Value & "', '" & _
frmMenu.toolempno.Text & "','" & today & "')")
dt = ctrl.ActionQuery("INSERT INTO log (EmpNo, Tanggal, Ket) VALUES ('" & _
frmMenu.toolempno.Text & "', '" & today & "', '" & c & "')")
MsgBox("Successful Save LossHours")
dgvLosshours.Rows.Clear()
End If
End If
API。
目前仅支持API级别24。
Java 8功能支持机制最近已被改变，当时谷歌放弃了杰克和吉尔的新工具链，而lately announced支持Java 8功能使用旧的工具链，调用'desugar'来改变Java8类文件到Java 7兼容的类文件（可从Android Studio 2.4 Preview 6获得） 您可以阅读更多here。
答案 1 :(得分：1)
感谢 yosriz 。 我使用：https://github.com/aNNiMON/Lightweight-Stream-API。 我的代码看起来像那样：
couponsCode.forEach(value -> couponsCodes.add(new CouponsCode(value)));
我的代码现在看起来像这样：
Stream.of(couponsCode).forEach(value -> couponsCodes.add(new CouponsCode(value)));
所有错误都消失了。