如何计算的GridView所需的高度是Android上滚动型的内部？ [英] How do I calculate the required height of a GridView that is inside of a ScrollView on Android?

问题描述

我有一个GridView一个的LinearLayout内滚动型的内部，在从服务器上的数据页。下面的GridView控件是一个按钮来加载更多的数据。我的GridView将具有最终高度是大于屏幕。如果我把我的GridView的高度，要么WRAP_CONTENT或parent_fill，其大小本身的确切可用的屏幕高度，根本不滚动，裁剪掉多余的行。如果我明确地设置layout_height的东西大，像1000dip，滚动的行为不当，但我不能predict我的滚动视图先验的最终高度。

我如何编程方式确定一个GridView来获得所需的行为进行必要的高度？

下面是我下面的布局。正如你可以看到我设置的高度1000dip，但毕竟是假的，我需要的价值得到自动设置/编程方式：

 ＆LT;滚动型
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =FILL_PARENT
    机器人：fillViewport =真
    机器人：layout_weight =1
    ＆GT;
        ＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
            机器人：layout_width =FILL_PARENT
            机器人：layout_height =WRAP_CONTENT
            机器人：方向=垂直
            ＆GT;            ＆LT; GridView控件的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
                机器人：ID =@ + ID /格
                机器人：layout_width =FILL_PARENT
                机器人：layout_height =1000dip
                机器人：columnWidth时=70dp
                机器人：为numColumns =auto_fit
                机器人：verticalSpacing =0dp
                机器人：horizo​​ntalSpacing =0dp
                机器人：stretchMode =columnWidth时
                机器人：比重=中心
                机器人：背景=＃000000
                机器人：layout_weight =1
            /＆GT;
            ＆LT;按钮
            机器人：ID =@ + ID / load_more
            机器人：layout_width =FILL_PARENT
            机器人：layout_height =WRAP_CONTENT
            机器人：文字=载入更多富
            /＆GT;
        ＆LT; / LinearLayout中＆GT;
    ＆LT; /滚动型＆GT;
 

解决方案

显然GridView的内部ScrollViews不在Android的土地犹太教。开关与定制行的ListView。这似乎表现得更好。

I have a GridView inside of a LinearLayout inside of a ScrollView that pages in data from the server. Beneath the GridView is a button to load more data. My GridView will have an ultimate height that is larger than the screen. If I set the height of my GridView to either wrap_content or parent_fill, it sizes itself to the exact available on-screen height and does not scroll at all, cropping out the extra rows. If I explicitly set the layout_height to something large, like 1000dip, scrolling behaves properly, however I cannot predict the final height of my scroll view apriori.

How do I programmatically determine the necessary height of a GridView to get the desired behaviour?

Here is my layout below. As you can see I set the height to 1000dip, but that is bogus, I need that value to get set automatically/programmatically:

        <ScrollView
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:fillViewport="true"        
    android:layout_weight="1"       
    >   
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"    
            >

            <GridView xmlns:android="http://schemas.android.com/apk/res/android" 
                android:id="@+id/grid"
                android:layout_width="fill_parent" 
                android:layout_height="1000dip"
                android:columnWidth="70dp"
                android:numColumns="auto_fit"
                android:verticalSpacing="0dp"
                android:horizontalSpacing="0dp"
                android:stretchMode="columnWidth"
                android:gravity="center"
                android:background="#000000"
                android:layout_weight="1"
            />
            <Button
            android:id="@+id/load_more"
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content"
            android:text="Load More Foo" 
            />
        </LinearLayout>
    </ScrollView>

解决方案

Apparently GridViews inside ScrollViews are not kosher in Android-land. Switching to ListView with custom-made rows. That seems to behave better.

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