scrollview 里面的 android-recycleview

Question

在我的 Activity 中，我想在我的页面上方放一个 slideShow，然后放 recycleview，为此，我在我的布局中编写了这段代码:

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#fff"
    android:orientation="vertical"
    android:padding="6dp">


    <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        card_view:cardBackgroundColor="#fff"
        card_view:cardCornerRadius="3dp"
        card_view:cardElevation="0dp">

        <cn.trinea.android.view.autoscrollviewpager.AutoScrollViewPager
            android:id="@+id/pager"
            android:layout_width="match_parent"
            android:layout_height="250dp" />
    </android.support.v7.widget.CardView>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    </android.support.v7.widget.RecyclerView>
</LinearLayout>

此代码的问题是，当我运行 Activity 时，只有回收 View 滚动，我不希望那样，我希望如果我向下滚动，整个页面都向下滚动，而不仅仅是回收。

如何让整个页面滚动？

Answer 1

三个步骤:

1. 将您的 ScrollView 替换为布局行为设置为 app:layout_behavior="@string/appbar_scrolling_view_behavior"
的 NestedScrollView

2. 将所有小部件保持在线性/相对布局下(因为嵌套 ScrollView 只接受一个 subview ) 3.使用此代码创建 CustomLinearLayoutManager.java:

   public class CustomLinearLayoutManager extends LinearLayoutManager {
   
   public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout)    {
       super(context, orientation, reverseLayout);
   }
   
   private int[] mMeasuredDimension = new int[2];
   
   @Override
   public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state,
                         int widthSpec, int heightSpec) {
       final int widthMode = View.MeasureSpec.getMode(widthSpec);
       final int heightMode = View.MeasureSpec.getMode(heightSpec);
       final int widthSize = View.MeasureSpec.getSize(widthSpec);
       final int heightSize = View.MeasureSpec.getSize(heightSpec);
       int width = 0;
       int height = 0;
       for (int i = 0; i < getItemCount(); i++) {
           measureScrapChild(recycler, i,
                   View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
                   View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
                   mMeasuredDimension);
   
           if (getOrientation() == HORIZONTAL) {
               width = width + mMeasuredDimension[0];
               if (i == 0) {
                   height = mMeasuredDimension[1];
               }
           } else {
               height = height + mMeasuredDimension[1];
               if (i == 0) {
                   width = mMeasuredDimension[0];
               }
           }
       }
       switch (widthMode) {
           case View.MeasureSpec.EXACTLY:
               width = widthSize;
           case View.MeasureSpec.AT_MOST:
           case View.MeasureSpec.UNSPECIFIED:
       }
   
       switch (heightMode) {
           case View.MeasureSpec.EXACTLY:
               height = heightSize;
           case View.MeasureSpec.AT_MOST:
           case View.MeasureSpec.UNSPECIFIED:
       }
   
       setMeasuredDimension(width, height);
   }
   
   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);
       }
   }
   

像这样将适配器设置为您的回收 View :

CustomLinearLayoutManager customLinearLayoutManager = new CustomLinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        updatesRecyclerView.setHasFixedSize(true);
        updatesRecyclerView.setLayoutManager(customLinearLayoutManager);
        updatesRecyclerView.setAdapter(yourAdapter);
        updatesRecyclerView.setNestedScrollingEnabled(false);

就是这样，它有效。