安卓的LinearLayout补这方面的中间人 [英] Android LinearLayout fill-the-middle

问题描述

我有一个垂直的，设置高度（300像素）的LinearLayout（LL）与3嵌套LLS。 1和第3的设置与Android：layout_height =WRAP_CONTENT和中间的一个与Android：layout_height =FILL_PARENT。令我失望的是，第3 LL被排挤出具有：第二个灌装父布局右底部。我如何达到预期的效果，因为我想有可能调整外容器的中间部分膨胀和收缩，以适应变化

I have a vertical, set height (300px) LinearLayout (LL) with 3 nested LLs. 1 and 3rd are set with android:layout_height="wrap_content" and the middle one with android:layout_height="fill_parent". To my dismay, 3rd LL gets pushed out with 2nd one filling parent layout right to the bottom. How do I achieve desired effect since I want potentially resize the outside container with the middle portion expanding and contracting to accommodate the change

推荐答案

横空出世（感谢马克·墨菲<一href="https://groups.google.com/group/android-developers/browse_thread/thread/a08e42713ce94f43/e9e31d27e3e31845?lnk=gst&q=droidin#e9e31d27e3e31845">for答案），所有我要买的是设置中间行

Turned out (Thanks Mark Murphy for the answer) that all I was looking for was to set middle row to

layout_height =0px​​和layout_weight =1

layout_height="0px" and layout_weight="1"

如果，毕竟WRAP_CONTENT和固定大小的项目分配给   沿着轴线（水平或垂直），仍有空间上轴   遗留，的LinearLayout然后分配的剩余空间的那些   部件与指定的权重，按比例的权重。

If, after all the wrap_content and fixed-sized items are allocated for along an axis (horizontal or vertical), there is still room on that axis left over, LinearLayout then allocates the remaining space to those widgets with specified weights, in proportion to the weight.

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