The following is the first few sections of a chapter from The Busy Coder's Guide to Android Development, plus headings for the remaining major sections, to give you an idea about the content of the chapter.
In the master-detail UI pattern, we are showing both the master and the detail fragment,
side-by-side, on larger screens, while showing only one at a time on smaller screens.
SlidingPaneLayout encapsulates that logic.
SlidingPaneLayout will detect the screen size. If the screen size is big enough,
SlidingPaneLayout will display its two children side-by-side. If the screen size
is not big enough,
SlidingPaneLayout will display one child at a time. However, by
default, when the “master” child is visible, a thin strip on the right will allow the
user to return to the “detail” child. Similarly, a swiping gesture can switch from
the “detail” back to the “master” child. These are in addition to any changes in context
you might introduce based on UI operations (e.g., tapping on an element in a master
RecyclerView automatically switching to the detail child).
SlidingPaneLayout is in the Support Library, in the
for 27.1.1 and its own
slidingpanelayout artifact in 28.0.0 and higher.
SlidingPaneLayout can go in your activity’s layout. It works like a horizontal
LinearLayout and is designed to hold two or more children. The first child is
considered to be “the pane” and is the portion that slides over top of everything
else in the
As with a
LinearLayout, you can use
android:layout_width to specify minimum
widths for your contents, plus
android:layout_weight to allocate any unused space:
<android.support.v4.widget.SlidingPaneLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/panes" android:layout_width="match_parent" android:layout_height="match_parent"> <fragment android:id="@+id/sensors" android:name="com.commonsware.android.sensor.monitor.SensorsFragment" android:layout_width="300sp" android:layout_height="match_parent"/> <fragment android:id="@+id/log" android:name="com.commonsware.android.sensor.monitor.SensorLogFragment" android:layout_width="400dp" android:layout_height="match_parent" android:layout_weight="1"/> </android.support.v4.widget.SlidingPaneLayout>
Here, we have two fragments inside of the
SlidingPaneLayout. If the current
screen width is
400dp or larger, both fragments will be shown side-by-side,
log fragment taking up all remaining space (courtesy of its
android:layout_weight="1" attribute). If the current width is smaller than
400dp, though, the two fragments will overlap, with the
fragment sliding over top of the
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