Initial commit of paging component.
This commit introduces a paging component to enable gradual, lazy
loading from large data sources, including Room queries.
The primary entry points are:
1) CountedDataSource, the base class for defining a countable (i.e.
fixed, known size) source of items, such as a Database query.
2) LazyList, the lazy-loading List-like component which pages content
in on a background thread from a CountedDataSource.
3) LiveLazyListProvider, the class which produces DataSources, and
presents a LiveData<LazyList<T>>.
4) LazyListAdapterHelper, which takes a LiveData<LazyList>, and
presents the data simply to an adapter. It computes differences
between versions with DiffUtil, and signalling updates to the adapter.
Currently, Room only presents a limit-offset query as an easy means to
get a LiveData of a LazyList, but it's possible to write a custom data
source to page in data from keyed (including composite-keyed) queries.
Test: new tests
Change-Id: I415879a032d83786d734c26c429828da3b8bc76a
diff --git a/app-toolkit/settings.gradle b/app-toolkit/settings.gradle
index 15ed47c..d8d3d35 100644
--- a/app-toolkit/settings.gradle
+++ b/app-toolkit/settings.gradle
@@ -33,6 +33,15 @@
include ':arch:common'
project(':arch:common').projectDir = new File(supportRoot, "app-toolkit/common")
+include ':paging:common'
+project(':paging:common').projectDir = new File(supportRoot, "paging/common")
+
+include ":paging:runtime"
+project(':paging:runtime').projectDir = new File(supportRoot, "paging/runtime")
+
+include ':paging:integration-tests:testapp'
+project(':paging:integration-tests:testapp').projectDir = new File(supportRoot, "paging/integration-tests/testapp")
+
include ':arch:core-testing'
project(':arch:core-testing').projectDir = new File(supportRoot, "app-toolkit/core-testing")