Android ViewPager 维度

问题描述

ViewPager 是否必须是活动布局中唯一存在的对象?我正在尝试实现这样的东西:

Does the ViewPager have to be the only object present inside the activity layout? I'm trying to implement something like this:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/reader_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<android.support.v4.view.ViewPager
    android:id="@+id/page_viewer"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

<Gallery
    android:id="@+id/miniatures_gallery"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" /></LinearLayout>

我应该在哪里有一个在顶部滚动的大寻呼机(我有它)和一个较小的画廊在它下面滚动.这仅显示寻呼机而不显示图库.有什么建议吗?

Where should I have a big pager scrolling in the top (and I have it) and a smaller gallery scrolling under that. This shows me only the pager and not the gallery. Any suggestion?

推荐答案

ViewPager 不支持 wrap_content 因为它(通常)永远不会同时加载所有子项，因此不能获得适当的大小(选项是让寻呼机在每次切换页面时都会改变大小).

The ViewPager does not support wrap_content as it (usually) never have all its children loaded at the same time, and can therefore not get an appropriate size (the option would be to have a pager that changes size every time you have switched page).

但是，您可以设置精确的尺寸(例如 150dp)，match_parent 也可以.
您还可以通过更改 LayoutParams 中的 height 属性从代码中动态修改尺寸.

You can however set a precise dimension (e.g. 150dp) and match_parent works as well.
You can also modify the dimensions dynamically from your code by changing the height-attribute in its LayoutParams.

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