Android - java.lang.IndexOutOfBoundsException:项目位置0(0)无效.项目数:0

Question

我在日志中收到此异常 -

 java.lang.IndexOutOfBoundsException: Invalid item position 0(0). Item count:0
            at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4622)
            at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4617)
            at com.jivemap.app.CustomizedViews.MyLinearLayoutManager.measureScrapChild(MyLinearLayoutManager.java:66)
            at com.jivemap.app.CustomizedViews.MyLinearLayoutManager.onMeasure(MyLinearLayoutManager.java:30)
            at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:2614)
            at android.view.View.measure(View.java:15318)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1413)
            at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1061)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:599)
            at android.view.View.measure(View.java:15318)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1413)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:704)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:597)
            at android.view.View.measure(View.java:15318)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1413)
            at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1061)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:599)
            at android.view.View.measure(View.java:15318)
            at android.widget.ListView.setupChild(ListView.java:1849)
            at android.widget.ListView.makeAndAddView(ListView.java:1764)
            at android.widget.ListView.fillSpecific(ListView.java:1320)
            at android.widget.ListView.layoutChildren(ListView.java:1635)
            at android.widget.AbsListView.onLayout(AbsListView.java:2141)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.support.v4.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:596)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1695)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1672)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1530)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1443)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1672)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1530)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1443)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1672)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1530)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1443)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
            at android.view.View.layout(View.java:13874)
            at android.view.ViewGroup.layout(ViewGroup.java:4364)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:448)

我收到这个错误 -

View view = recycler.getViewForPosition(position);

在这里,在这个自定义LinearLayoutManager的方法中 -

  private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
                                   int heightSpec, int[] measuredDimension) {



        View view = recycler.getViewForPosition(position);
        if (view != null) {
            RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
            int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,
                    getPaddingLeft() + getPaddingRight(), p.width);
            int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,
                    getPaddingTop() + getPaddingBottom(), p.height);
            view.measure(childWidthSpec, childHeightSpec);
            measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;
            measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;
            recycler.recycleView(view);

        }
    }

以前,它运作良好.我最近将targetSdkVersion更改为23(Marshmallow),以及支持lib的版本.可能是出于同样原因的问题.

请指导我,如何解决这个问题.

Answer 1

我遇到了同样的问题,我找到了解决问题的更好方法.

setAutoMeasureEnabled(false);在自定义LayoutManager的构造函数中调用.