本文介绍了如何在不在 xml 中的代码中设置 RelativeLayout 布局参数?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
例如我想在屏幕上添加 3 个按钮:一个左对齐，一个居中对齐，最后一个右对齐.
For example I want to add 3 buttons on screen: one align left, one align center, last one align right.
如何在代码中而不是在 xml 中设置它们的布局?
How can I set their layout in code, not in xml?
推荐答案
只是一个基本的例子:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
Button button1;
button1.setLayoutParams(params);
params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.RIGHT_OF, button1.getId());
Button button2;
button2.setLayoutParams(params);
如您所见，这是您必须做的:
As you can see, this is what you have to do:
- 创建一个
RelativeLayout.LayoutParams对象. - 使用
addRule(int)或addRule(int, int)来设置规则.第一种方法用于添加不需要值的规则. - 为视图设置参数(在本例中为每个按钮).
- Create a
RelativeLayout.LayoutParamsobject. - Use
addRule(int)oraddRule(int, int)to set the rules. The first method is used to add rules that don't require values. - Set the parameters to the view (in this case, to each button).
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