The include tag in the Android layout uses

The include tag in the Android layout uses

Recently in the layout, there are a lot of pages are common features, such as the title: a similar style!

As shown in the following:

If you give each page a separate title layout that would be too much trouble, if you can write a title layout, other pages reuse that much better!
This time, <include> it is a grand debut!

Write a title for the layout title.xml :

<?xml version= "1.0" encoding= "Utf-8"?><relativelayout xmlns:android="Http://schemas.android.com/apk/res/android" android:layout_width="Match_parent"android:layout_height="Wrap_content" android:background="@drawable/navigation_bar" >                <ImageViewandroid:id="@+id/img_backward"android:layout_alignparentleft ="true"android:layout_centervertical="true"android:layout_marginleft= "25DP" android:layout_gravity="center"android:layout_width="Wrap_content" android:layout_height="Wrap_content"android:src="@drawable/backward" />                                                                    <TextView        Android:id="@+id/tv_title"        Android:layout_width="Wrap_content"        Android:layout_height="Wrap_content"        android:textsize="20SP"        android:gravity="Center"        android:layout_centerinparent="true"        android:layout_gravity="Center"        Android:textcolor="@color/white"        Android:text="@string/tiltename"/></relativelayout>

On top of a few other similar pages <include> title.xml :

<linearlayout xmlns:android="Http://schemas.android.com/apk/res/android"  Xmlns:tools="Http://schemas.android.com/tools"android:layout_width="Match_parent"  android:layout_height="Match_parent"android:orientation="Vertical" >                    <!--titles --    <includeandroid:id="@+id/title_res"layout="@layout/title" / >                    <!--interface Content --    <framelayoutandroid:id="@+id/app_content"android:layout_width= "Match_parent" android:layout_height="match_parent" />                        </linearlayout>

It is important to note that in Google's official documentation there is a <include ...> last word:

However, if you want-to-override layout attributes using the tag, you must override both Android:layout_height and Android : Layout_width in order for other layout attributes to take effect.

The meaning is:

If you want to <include ...> use attributes in a tag layout_** , you must include and in the tags include android:layout_height android:layout_width , otherwise the layout_** properties will not take effect!

Summarize

In short, the label is to reuse the existing layout, no need to write redundant code! ———— multiplexing Layouts

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

The include tag in the Android layout uses