动态更改一个按钮相对于另一个按钮的位置

问题描述

我看过几个示例，这些示例用于通过程序(来自Java)为android中的视图设置相对位置.但是在我的特定情况下，我有2个按钮(不是视图)，分别说"button_tag"和"button_rate"，它们是通过xml制作的，并且默认情况下在"button_rate"上方排列为"button_tag".如果在任何时间点上都有一种机制，我可以通过该机制动态地使"button_rate"下面的"button_tag".

I had seen a couple of examples for setting the relative position through program (from java) for views in android. But in my particular case i have 2 buttons (which are not views) say "button_tag" and "button_rate" which are made via xml and are arranged such as "button_tag" above "button_rate" by default. If at any point of time is there a mechanism by which i can make "button_tag" below "button_rate" dynamically.

 <Button
     android:id="@+id/button_tag"
     android:layout_width="match_parent"
     android:layout_height="40dp"
     android:layout_marginTop="1dp"
     android:background="@drawable/img_whitebackground"
     android:gravity="left|center_vertical"
     android:paddingLeft="5dip"
     android:text="@string/string_tag"
     android:onClick="click_addscreen" >
 </Button>

 <Button
    android:id="@+id/button_rate"
    android:layout_marginTop="1dp"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:text="@string/string_rate"
    android:gravity="left|center_vertical"
    android:paddingLeft="5dip"
    android:onClick="click_addscreen"
    android:background="@drawable/img_whitebackground" >
</Button>

两个按钮的xml部分如图所示

The xml part of the two buttons are as shown

推荐答案

您可以添加规则以动态设置位置.

You can add rules to set position dynamically.

RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                    ViewGroup.LayoutParams.MATCH_PARENT);

p.addRule(RelativeLayout.BELOW, R.id.button_rate);
buttonTag.setLayoutParams(p);

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