Hi, I started to study the development of Ubuntu for the mobile world. I write here what I did to install the development environment.
I hope someone can help me. Thanks to everyone!

1. Fresh installation of Ubuntu 16.04 LTS Desktop
2. Update and upgrade it
3. In according to communication of Zoltán Balogh of 2016-April and
the installation guide of Ubuntu SDK, I followed this instructions sequence:
Code:
sudo add-apt-repository ppa:ubuntu-sdk-team/ppa
sudo apt update && sudo apt install ubuntu-sdk
sudo apt update && sudo apt dist-upgrade
sudo apt install ubuntu-sdk-api-15.04-armhf
sudo apt update && sudo apt install ubuntu-sdk-ide ubuntu-sdk-dev
https://lists.ubuntu.com/archives/ub...il/039322.html

4. Well! I started to use IDE and I received the update notification of ubuntu-sdk-15.04-armhf kit.
I don't accepted the request update.

At this time I have this content for armhf kit:
Code:
ls -l /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/

    drwxr-xr-x 11 root root 4096 gen 22 20:29 Components
    drwxr-xr-x  2 root root 4096 gen 22 20:28 Content
    drwxr-xr-x  2 root root 4096 gen 22 20:30 DownloadManager
    drwxr-xr-x  2 root root 4096 gen 22 20:29 Layouts
    drwxr-xr-x  2 root root 4096 gen 22 20:28 MediaScanner.0.1
    drwxr-xr-x  3 root root 4096 gen 22 20:30 OnlineAccounts
    drwxr-xr-x  2 root root 4096 gen 22 20:29 PerformanceMetrics
    drwxr-xr-x  2 root root 4096 gen 22 20:30 PushNotifications
    drwxr-xr-x  2 root root 4096 gen 22 20:28 SyncMonitor
    drwxr-xr-x  3 root root 4096 gen 22 20:29 Telephony
    drwxr-xr-x  2 root root 4096 gen 22 20:29 Test
    drwxr-xr-x  3 root root 4096 gen 22 20:29 Unity
5. I created my first project from this template: QML App with Simple UI(qmake)
(QtQuick2 app with kit using 15.04 click root)

There is an error on Main.qml for import Ubuntu.Components 1.3

Code:
[11:58:52] ii click-reviewers-tools 0.42

    Warnings while parsing QML type information of /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/Components:
    Failed to parse "/var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/Components/plugins.qmltypes".
    Error: /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/Components/plugins.qmltypes:1443:39: Meta object revision without matching export.
    /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/Components/plugins.qmltypes:1452:39: Meta object revision without matching export.
    /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/Components/plugins.qmltypes:1470:39: Meta object revision without matching export.

    Warnings while parsing QML type information of /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/QtMultimedia:
    Failed to parse "/var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/QtMultimedia/plugins.qmltypes".
    Error: /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/QtMultimedia/plugins.qmltypes:0:0: Expected a single import.
6. Ok, I close ide and reopen it.
Well, I accept request update for kits: ubuntu-sdk-15.04-armhf and ubuntu-sdk-15.04-i386

Now I have this content for amrhf kit

Code:
ls -l /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml/Ubuntu/

    drwxr-xr-x 2 root root 4096 mag  1 12:16 Content
    drwxr-xr-x 2 root root 4096 mag  1 12:16 DownloadManager
    drwxr-xr-x 2 root root 4096 mag  1 12:16 Layouts
    drwxr-xr-x 2 root root 4096 mag  1 12:16 MediaScanner.0.1
    drwxr-xr-x 3 root root 4096 gen 22 20:30 OnlineAccounts
    drwxr-xr-x 2 root root 4096 mag  1 12:16 PerformanceMetrics
    drwxr-xr-x 2 root root 4096 mag  1 12:16 SyncMonitor
    drwxr-xr-x 3 root root 4096 gen 22 20:29 Unity
The following folders have been deleted after the update request---is it correct?
Code:
drwxr-xr-x 11 root root 4096 gen 22 20:29 Components
    drwxr-xr-x  2 root root 4096 gen 22 20:30 PushNotifications
    drwxr-xr-x  3 root root 4096 gen 22 20:29 Telephony
    drwxr-xr-x  2 root root 4096 gen 22 20:29 Test

7. Now I have this error on import Ubuntu.Components 1.3:

Code:
QML module not found
    import paths /var/lib/schroot/chroots/click-ubuntu-sdk-15.04-armhf/usr/lib/arm-linux-gnueabihf/qt5/qml
    For cmake project use QML_IMPORT_PATH variable to add import paths

8. My qtchooser and qmake version command output:

Code:
qtchooser -l
    4
    5
    default
    qt4-x86_64-linux-gnu
    qt4
    qt5-x86_64-linux-gnu
    qt5
    --------
    --------
    qmake -version
    QMake version 3.0
    Using Qt version 5.5.1 in /usr/lib/x86_64-linux-gnu