Android的：检索layout_marginBottom编程？ [英] Android: Retrieve layout_marginBottom programmatically?

问题描述

在我一个的LinearLayout我已设置的android：layout_marginBottom 在我的XML。我只是想找回价值。

In my a LinearLayout I have set android:layout_marginBottom in my XML. I just want to retrieve that value.

只是的LayoutParams 不给我访问 bottomMargin 。我试图强制转换：

Just LayoutParams doesn't give me access to bottomMargin . I tried to typecast :

row1 = (LinearLayout) findViewById(R.id.mainrow1); 
LinearLayout.LayoutParams row1Params = (android.widget.LinearLayout.LayoutParams) row1.getLayoutParams();

但是这给了我运行时异常ClassCastException异常。

but this gives me Runtime exception ClassCastException.

主要目标是我在嵌套LinearLayouts＆放按钮;我想设置的LinearLayout的高度/宽度编程按钮，即会自动inturn设定高度。我也第一次布局后添加bottomMargin - 所以有2行之间的空间。

The main aim is I got buttons in nested LinearLayouts & I want to set height/width of LinearLayout programmatically that will inturn auto set height of buttons. I have added bottomMargin after 1st layout - so there is space between 2 rows.

推荐答案

根据下面的逻辑改变你的按钮布局，

Change Your layout of Button according to following logic,

设置为Layout_Width 0dip
设置Layout_Weight 1
设置Layout_Height为WRAP_CONTENT

set Layout_Width to 0dip set Layout_Weight to 1 set Layout_Height to Wrap_Content

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