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      1 Library Project including compatibility GridLayout.
      2 
      3 This can be used by an Android project to provide
      4 access to GridLayout on applications running on API 7+.
      5 
      6 There is technically no source, but the src folder is necessary
      7 to ensure that the build system works.  The content is actually
      8 located in libs/android-support-v7-gridlayout.jar.
      9 The accompanying resources must also be included in the application.
     10 
     11 
     12 USAGE:
     13 
     14 Make sure you use <android.support.v7.widget.GridLayout> in your
     15 layouts instead of <GridLayout>.
     16 Same for <android.support.v4.widget.Space> instead of <Space>.
     17 
     18 Additionally, all of GridLayout's attributes should be put in the
     19 namespace of the app, as those attributes have been redefined in
     20 the library so that it can run on older platforms that don't offer
     21 those attributes in their namespace.
     22 
     23 To know which attributes need the application namespace, look at
     24 the two declare-styleable declared in res/values/attrs.xml
     25 
     26 
     27 
     28 For instance:
     29 
     30 <?xml version="1.0" encoding="utf-8"?>
     31 <android.support.v7.widget.GridLayout
     32     xmlns:android="http://schemas.android.com/apk/res/android"
     33     xmlns:app="http://schemas.android.com/apk/res-auto"  <==== the namespace used for the library project
     34     android:layout_width="match_parent"
     35     android:layout_height="match_parent"
     36     app:columnCount="6" >                                <===== notice how we're using app:columnCount here, not android:columnCount!
     37 
     38     <Button
     39         android:id="@+id/button1"
     40         app:layout_column="1"                            <=== again, note the app: namespace
     41         app:layout_columnSpan="2"
     42         app:layout_gravity="left"
     43         app:layout_row="1"
     44         android:text="Button" />
     45 
     46     <CheckBox
     47         android:id="@+id/checkBox1"
     48         app:layout_column="4"
     49         app:layout_gravity="left"
     50         app:layout_row="2"
     51         android:text="CheckBox" />
     52 
     53     <Button
     54         android:id="@+id/button2"
     55         app:layout_column="5"
     56         app:layout_gravity="left"
     57         app:layout_row="3"
     58         android:text="Button" />
     59 
     60     <android.support.v4.widget.Space                    <=== space widgets also need the full support package path
     61         android:layout_width="21dp"                     <=== use the android namespace for width, height etc -- only use app: for the grid layout library's new resources
     62         android:layout_height="1dp"
     63         app:layout_column="0"
     64         app:layout_gravity="fill_horizontal"
     65         app:layout_row="0" />
     66 
     67