机器人：RecyclerView内的滚动型（或视差） [英] android: RecyclerView inside a ScrollView (or parallax)

问题描述

我是 2 cardviews 与内多个控件的片段。

下面第二cardview我有一个 recyclerview ，这个工程完美

的问题是，recyclerview启动屏幕的最底部，并滚动recylcerview很小

previously使用列表视图，这使我适合你的内容，从而使滚动在屏幕上一次，但recylclerview不能。

如何使我的时候滚动了recyclerview，控件上去像视差效果呢？

编辑：更清晰，想象2 cardviews的片段，这些占据了80％的屏幕，上面的这些，有100个项目列表的recyclerview，但滚动是如此的渺小......列表视图让我适应到内容和滚动整个屏幕上一次。

这是我的XML布局：

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT;滚动型的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：ID =@ + ID / svScroll
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =FILL_PARENT
    机器人：fillViewport =真正的＆GT;

    ＆LT; RelativeLayout的
        机器人：layout_width =FILL_PARENT
        机器人：layout_height =WRAP_CONTENT＆GT;

        ＆LT;包括
            机器人：ID =@ + ID / cvCampos1
            布局=@布局/ ctlcabeceralibreta/＆GT;

        ＆LT;包括
            机器人：ID =@ + ID / cvCampos2
            布局=@布局/ ctlcabeceralibreta2/＆GT;

        ＆LT; android.support.v7.widget.RecyclerView
            机器人：ID =@ + ID / rvRegistros
            机器人：layout_width =FILL_PARENT
            机器人：layout_height =1000dp
            机器人：layout_below =@ ID / cvCampos2
            机器人：滚动条=垂直/＆GT;
    ＆LT; / RelativeLayout的＆GT;

＆LT; /滚动型＆GT;
 

这是screenshoot：

解决方案

  

把一个固定的高度工作!!!但我需要计算的高度   项的列表中的数

这适用于列表视图（我不与recyclerview测试吧）

 公共静态无效setListViewHeightBasedOnChildren（ListView控件的ListView）{
        ListAdapter listAdapter = listView.getAdapter（）;
        如果（listAdapter == NULL）{
            // pre-条件
            返回;
        }

        INT totalHeight = listView.getPaddingTop（）+ listView.getPaddingBottom（）;
        的for（int i = 0; I＆LT; listAdapter.getCount（）;我++）{
            查看的listItem = listAdapter.getView（I，空，ListView控件）;
            如果（的listItem的instanceof的ViewGroup）{
                listItem.setLayoutParams（新ViewGroup.LayoutParams（ViewGroup.LayoutParams.WRAP_CONTENT，ViewGroup.LayoutParams.WRAP_CONTENT））;
            }
            listItem.measure（0，0）;
            totalHeight + = listItem.getMeasuredHeight（）;
        }

        ViewGroup.LayoutParams PARAMS = listView.getLayoutParams（）;
        params.height = totalHeight +（listView.getDividerHeight（）*（listAdapter.getCount（） -  1））;
        listView.setLayoutParams（PARAMS）;
    }
 

编辑：

完整的示例

I have a fragment with 2 cardviews with multiple controls within.

below the second cardview I have a recyclerview, this works perfect.

the problem is that the recyclerview starts very bottom of the screen, and scroll the recylcerview is very small.

previously used a listview, and this kept me fit your content and thus make scroll across the screen at once, but with recylclerview can not.

How to make when I scroll in the recyclerview, controls go up like parallax effect?

EDIT: more clear, imagine 2 cardviews in a fragment, these occupy 80% of the screen, above of these, a recyclerview with a list of 100 items, but the scroll is so tiny...the listview let me adapt to the "content" and scroll the entire screen at once.

this is my XML layout:

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/svScroll"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:fillViewport="true" >

    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <include
            android:id="@+id/cvCampos1"
            layout="@layout/ctlcabeceralibreta" />

        <include
            android:id="@+id/cvCampos2"
            layout="@layout/ctlcabeceralibreta2" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rvRegistros"
            android:layout_width="fill_parent"
            android:layout_height="1000dp"
            android:layout_below="@id/cvCampos2"
            android:scrollbars="vertical" />
    </RelativeLayout>

</ScrollView>

this is the screenshoot:

解决方案

putting a fixed height works !!! but I need to calculate the height of the number of items in the list

this works for listviews (i dont tested it with recyclerview)

public static void setListViewHeightBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null) {
            // pre-condition
            return;
        }

        int totalHeight = listView.getPaddingTop() + listView.getPaddingBottom();
        for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView);
            if (listItem instanceof ViewGroup) {
                listItem.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            }
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
    }

Edit:

Full example

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