Android using include[in Layout XML]

Source: Internet
Author: User

In the Android layout style definition, you can use the XML file for easy implementation, sometimes for the reuse of modules, the include tag can be used to achieve this purpose. For example:

<include layout="@layout/otherlayout"></div> 

The description of the official website for Android development is here.
Among them, there are references to:

Similarly, you can override all the layout parameters. This means, any android:layout_* attribute can is used with the <include> tag.

This means that any android:layout_* attribute can be applied to the tag.

If you use the following code:

<relativelayout android:layout_width= Fill_ Parent "android:layout_height=" wrap_content ">  <textview android:layout_width= "Fill_parent" android:layout_height= "wrap_content"  Android:text= "@string/somestring" android:id= "@ +id/top "/> <include layout=  "@layout/otherlayout" android:layout_below= @id /top "/></relativelayout >       

includeThe discovery of the otherlayout, and not in the id/top as we expected under this textview, but ignores the Android:layout_below attribute. After Google's discovery, many people encounter similar problems.

A workaround is to wrap the linearlayout outside of the include, as follows:

<Linearlayout    android:layout_width="fill_parent"    android:layout_height="wrap_content" android:layout_below="@id/top" > <include layout="@layout/otherlayout"></Linearlayout > 

A better solution was found on the Statckoverflow:
Solution: You must also overload layout_width and layoutheight familiar, other layout* properties will work, no this will be ignored. The above example should be written like this:

<include layout="@layout/otherlayout">    android:layout_height="wrap_content"    android:layout_width="fill_parent"    android:layout_below="@id/top" />

In addition, about the reuse of XML, you can also use the merge tag, the merge tag is mainly used to optimize the display, reduce the level of the view tree, you can refer to here: Layout-tricks-merge.html translation version here:


Android using include[in Layout XML]

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