Doc: Describe creating Android App Bundles

Change-Id: I6c3e69511f2340753c9832e33e0e844e3690f7a5
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

doc/src/android/androiddev.qdoc

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2018 The Qt Company Ltd.
+** Copyright (C) 2019 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the Qt Creator documentation.
@@ -66,10 +66,10 @@
             \note Android SDK Tools have issues with JDK versions later than 8.
 
         \li \l{http://www.gradle.org}{Gradle} for building application packages
-            for Android devices (APK). Gradle is delivered with Qt 5.9, and
-            later. Because Gradle scripts are not delivered with Android SDK
-            Tools since version 26.0.0, they are delivered with Qt 5.9 and
-            5.6.3.
+            (APK) and app bundles (AAB) for Android devices. Gradle is delivered
+            with Qt 5.9, and later. Because Gradle scripts are not delivered
+            with  Android SDK tools since version 26.0.0, they are delivered
+            with Qt 5.9 and 5.6.3.
 
             \note Using Ant to build APKs is no longer supported.
 
@@ -77,6 +77,9 @@
             by the \l{http://developer.android.com/tools/sdk/ndk/index.html}
             {Android NDK} from Google.
 
+            \note To develop with Qt 5.14.0 or later, you need Android NDK r20
+            or later.
+
         \li \l{http://developer.android.com/sdk/index.html}{Android SDK Tools}
 
             The following Android SDK packages and tools are required for
@@ -167,7 +170,7 @@
 
         \li In the \uicontrol {JDK location} field, add the path to the JDK.
 
-            You can use the \inlineimage download.png
+            Select the \inlineimage icons/download-icon.png
             (\uicontrol Download) button to go to the site where you can
             download the JDK. \QC checks the JDK installation and reports
             errors.
@@ -175,9 +178,8 @@
         \li In the \uicontrol {Android Settings} group, add paths to the Android
             NDK and SDK.
 
-            You can use the \inlineimage download.png
-            (\uicontrol Download) buttons to go to the sites where you can download
-            the Android NDK and SDK.
+            Select \inlineimage icons/download-icon.png
+            to go to the sites where you can download the Android NDK and SDK.
 
             The SDK Manager checks the Android NDK and SDK installations,
             reports errors, and offers to install the necessary packages.
@@ -192,7 +194,8 @@
 
         \li Select \uicontrol File > \uicontrol {New File or Project} > \uicontrol Application >
             \uicontrol {Qt Quick Application} > \uicontrol Choose, and
-            follow the instructions of the wizard. For more information, see
+            follow the instructions of the wizard to create a project. For more
+            information, see
             \if defined(qtcreator)
             \l{Creating Qt Quick Projects}.
             \else

doc/src/android/deploying-android.qdoc

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2018 The Qt Company Ltd.
+** Copyright (C) 2019 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the Qt Creator documentation.
@@ -32,9 +32,19 @@
 
     \title Deploying Applications to Android Devices
 
-    On Android, applications are distributed in a specially structured type of
-    ZIP package called an APK. \QC supports the following methods of deployment
-    for Android applications:
+    On Android, applications are distributed in specially structured types of
+    ZIP packages called Application Packages (APK) or Android App Bundles (AAB).
+    APK files can be downloaded to and executed on a device, whereas AAB is
+    intended to be interpreted by the Google Play store and is used to generate
+    APK files.
+
+    \l{Qt for Android} has binaries for armv7a, arm64-v8a, x86, and x86-64.
+    To support several different ABIs in your application, build an AAB that
+    contains binaries for each of the ABIs. The Google Play store uses the
+    AAB to generate optimized APK packages for the devices issuing the download
+    request and automatically signs them with your publisher key.
+
+    \QC supports the following methods of deployment for Android applications:
 
      \list
 
@@ -44,6 +54,9 @@
             The Ministro tool downloads the necessary Qt libraries from a
             repository of your choice.
 
+        \li Since Qt 5.14.0, as an app bundle (AAB), intended for distribution
+            in the Google Play store.
+
     \endlist
 
     To specify settings for application packages, select \uicontrol Projects >
@@ -137,6 +150,23 @@
     the \uicontrol {Compile Output} pane. To view additional information, select the
     \uicontrol {Verbose output} check box.
 
+    \section3 Building AABs
+
+    For testing the application locally, use the APK format, because
+    the package can be uploaded directly to the device and run. For
+    distribution to the Google Play store, create an AAB by selecting
+    the \uicontrol {Build .aab (Android App Bundle)} check box.
+
+    When building with CMake, you can select the ABIs to build the application
+    for in the \uicontrol CMake settings:
+
+    \image qtcreator-android-cmake-settings.png "CMake settings for building AABs"
+
+    When building with qmake, you can select the ABIs in the \uicontrol ABIs
+    field in the \uicontrol {Build Steps}:
+
+    \image qtcreator-android-build-steps.png "Android Build Steps"
+
     \section3 Selecting API Level
 
     In the \uicontrol {Android build SDK} field, you can select the API level to use