Question

我正在尝试实现无尽的适配器样式RecyclerView。我提供的OnScrollListener在用户到达数据集的上限和下限时请求更多内容。

因为数据集预计包含多达10k-30k的项目，所以我试图在任何时候只保留几百个项目。我遇到的问题是RecyclerView在修剪数据时会产生异常。这些是我的适配器中的自定义方法。

public void addToStart(final MyObject[] newItems) {
    handler.post(new Runnable() {
        @Override
        public void run() {
            items.addAll(0,Arrays.asList(newItems));
            trimEnd(newItems.length);
            notifyDataSetChanged();
        }
    });
}

public void addToEnd(final MyObject[] newItems) {
    handler.post(new Runnable() {
        @Override
        public void run() {
            items.addAll(Arrays.asList(newItems));
            trimStart(newItems.length);
            notifyDataSetChanged();
        }
    });


}

private void trimStart(int trimAmount) {
    items = items.subList(items.size() - trimAmount, items.size());
}

private void trimEnd(int trimAmount) {
    items = items.subList(0, items.size() - trimAmount);
}

在项目更新后滚动。抛出以下错误。

java.lang.IndexOutOfBoundsException：检测到不一致。无效项目位置90（偏移量：90）.state：100 在android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4320）在android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4278）在android.support.v7.widget.LinearLayoutManager $ LayoutState.next（LinearLayoutManager.java:1947）在android.support.v7.widget.GridLayoutManager.layoutChunk（GridLayoutManager.java:434）在android.support.v7.widget.LinearLayoutManager.fill（LinearLayoutManager.java:1322）在android.support.v7.widget.LinearLayoutManager.scrollBy（LinearLayoutManager.java:1150）在android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy（LinearLayoutManager.java:1007）在android.support.v7.widget.RecyclerView.scrollByInternal（RecyclerView.java:1355）在android.support.v7.widget.RecyclerView.onTouchEvent（RecyclerView.java:2209）在android.view.View.dispatchTouchEvent（View.java:8393）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2426）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2158）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2432）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2172）在com.android.internal.policy.impl.PhoneWindow $ DecorView.superDispatchTouchEvent（PhoneWindow.java:2314）在com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent（PhoneWindow.java:1692）在android.app.Activity.dispatchTouchEvent（Activity.java:2749）在android.support.v7.internal.view.WindowCallbackWrapper.dispatchTouchEvent（WindowCallbackWrapper.java:59）在android.support.v7.internal.view.WindowCallbackWrapper.dispatchTouchEvent（WindowCallbackWrapper.java:59）在com.android.internal.policy.impl.PhoneWindow $ DecorView.dispatchTouchEvent（PhoneWindow.java:2275）在android.view.View.dispatchPointerEvent（View.java:8583）在android.view.ViewRootImpl $ ViewPostImeInputStage.processPointerEvent（ViewRootImpl.java:4091）在android.view.ViewRootImpl $ ViewPostImeInputStage.onProcess（ViewRootImpl.java:3957）在android.view.ViewRootImpl $ InputStage.deliver（ViewRootImpl.java:3509）在android.view.ViewRootImpl $ InputStage.onDeliverToNext（ViewRootImpl.java:3562）在android.view.ViewRootImpl $ InputStage.forward（ViewRootImpl.java:3528）在android.view.ViewRootImpl $ AsyncInputStage.forward（ViewRootImpl.java:3638）在android.view.ViewRootImpl $ InputStage.apply（ViewRootImpl.java:3536）在android.view.ViewRootImpl $ AsyncInputStage.apply（ViewRootImpl.java:3695）在android.view.ViewRootImpl $ InputStage.deliver（ViewRootImpl.java:3509）在android.view.ViewRootImpl $ InputStage.onDeliverToNext（ViewRootImpl.java:3562）在android.view.ViewRootImpl $ InputStage.forward（ViewRootImpl.java:3528）在android.view.ViewRootImpl $ InputStage.apply（ViewRootImpl.java:3536）在android.view.ViewRootImpl $ InputStage.deliver（ViewRootImpl.java:3509）在android.view.ViewRootImpl.deliverInputEvent（ViewRootImpl.java:5806）在android.view.ViewRootImpl.doProcessInputEvents（ViewRootImpl.java:5745）在android.view.ViewRootImpl.enqueueInputEvent（ViewRootImpl.java:5716）在android.view.ViewRootImpl $ WindowInputEventReceiver.onInputEvent（ViewRootImpl.java:5896）在android.view.InputEventReceiver.dispatchInputEvent（InputEventReceiver.java:192）在android.view.InputEventReceiver.nativeConsumeBatchedInputEvents（InputEventReceiver.java）在android.view.InputEventReceiver.consumeBatchedInputEvents（InputEventReceiver.java:183）在android.view.ViewRootImpl.doConsumeBatchedInput（ViewRootImpl.java:5867）在android.view.ViewRootImpl $ ConsumeBatchedInputRunnable.run（ViewRootImpl.java:5919）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:767）在android.view.Choreographer.doCallbacks（Choreographer.java:580）在android.view.Choreographer.doFrame（Choreographer.java:548）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:753）在android.os.Handler.handleCallback（Handler.java:739）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:135）在android.app.ActivityThread.main（ActivityThread.java:5312）在java.lang.reflect.Method.invoke（Method.java）在java.lang.reflect.Method.invoke（Method.java:372）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:901）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:696）

如果我不缩小items数组，而只是添加它。 RecyclerView按预期显示不断增长的数据集。我在网上看到的所有例子都只显示添加项目。除了在用户滚动到上/下边界时重新创建适配器的分页以外，是否无法保持数据大小？

＆＃34;无尽的适配器＆＃34;。如何从RecyclerView中删除批量商品？

0 个答案: