Btoe co uk How-To Install Qt for Android on

Downloading the required files

Open a browser at www.qt.io

Now we navigate to the Developer’s page to read the desktop installation instructions.

Click Developers page

Click Installation (in Get Started)

Click Android

Android SDK

Click ‘Other download options’

Click to download android_sdk_rxx.tgz and save.

Android NDK

Click android-ndk-r-linux-x86_64.bin

Accept the T&C’s

Click Download

Qt

Open a browser at www.qt.io

Click Download. Here we will use the community edition for this demonstration.

Click Download under Community Edition (or edition required)

Click Download Now

Click Save file.

Linux Setup

Open a browser at www.qt.io

Now we navigate to the Developer’s page to read the desktop installation instructions.

Click Developers page

Click Installation (in Get Started)

Click Linux/X11

Library dependencies

sudo apt-get install build-essential libgl1-mesa-dev

Android

Click Developers page

Click Installation (in Get Started)

Click Android

Java

sudo apt-get install openjdk-7-jdk

Alternatively install oracle’s java7 JDK.

Ant

sudo apt-get install ant

ant -version

Android Setup

Using the File Manager, Open the ‘Home’ directory

Create new directory ‘develop/libs’

Move android files from ~/Downloads to ~/develop/libs

SDK

Extract SDK

Prerequisites

• 
  Navigate to www.android.com
  
• 
  Click Android SDK
  
• 
  Click Installing SDK
  
• 
  Click ‘Stand-alone SDK Tools’
  

Click ‘Troubleshooting Ubuntu’

Type the following:

sudo dpkg --add-architecture i386

sudo apt-get update

sudo apt-get install libncurses5:i386 libstdc++6:i386 zlib1g:i386

Note the ‘1’ is a one not an L.

Install SDK

Scroll down to instructions on updating SDK.

SDK Update

cd ~/develop/libs/android-sdk-linux

./tools/android update sdk

If you get Glib errors you can ignore them.

Under Tools:

Select:

• 
  Android SDK Tools
  
• 
  Android SDK Platform Tools
  
• 
  Android SDK Build-tools (Latest)
  

SDK API & Images Setup

In this How-To we are interested in supporting Android 5.0 to Android 4.4.2.

Select

• 
  ARM EABI v7a System Image
  
• 
  Intel x86 Atom System Image
  

Under Android 4.4.2 (API 19)

Select:

• 
  ARM EABI v7a System Image
  
• 
  Intel x86 Atom System Image
  

Click Install packages

Accept License

Click Install

Creating Virtual Android Devices

Let’s now create an ARM7 Device.

In the SDK Manager:

Click Tools-> Manage AVDs...

Click Create

Enter the following:

AVD Name: MyArm7

Device: 7” WSVGA

Target Android 5.0.1

CPU: ARM

Keyboard: set to present (ticked)

Skin: No skin

Use GPU: ticked

Click OK

Test the Device

Select MyArm7 in the list of virtual devices.

Click Start...

Click Launch

This can take up to 3 minutes to start the first time, and perhaps half that on subsequent start ups.

Close the Virtual Device.

Close the SDK Manager.

NDK

In browser locate instructions on NDK installation:

In the Android NDK tab, click Installing the NDK.

Type:

cd ~/develop/libs

chmod a+x android-ndk-r-linux-x86_64.bin

./android-ndk-r-linux-x86_64.bin

Qt Setup

Finally we are ready to setup Qt!

Navigate to the Developer’s page to read the Android installation instructions:

• 
  Click Developers page
  
• 
  Click Installation (in Get Started)
  
• 
  Click Android
  

Dependencies

In the Qt Getting started for Android tab, and show the library dependencies.

Type the following:

sudo apt-get install libgcc1:i386

Emulator

Type the following:

sudo apt-get install libsdl1.2debian:i386

Installing Qt

In the terminal type:

cd ~/Downloads

chmod a+x qt-opensource-linux-x64--online.run

./qt-opensource-linux-x64--online.run

Click Next.

Click Next to accept the installation directory.

Configuring components

To install a Qt kit component:

Expand the Qt version (e.g. 5.4)

Select the components:

• 
  gcc
  
• 
  Android x86
  
• 
  Android Arm 7
  

Note: If the latest version is a Release Candidate, is it highly recommended that you repeat the above selections to install the earlier stable release (e.g. 5.3).

Click Next

Accept the license agreement, and click Next.

Click Install (this may take up to 6 minutes to complete)

Untick the Readme.

Click Finish.

Note: You can use the Package Manager to change components later.

Qt Creator Setup

The Qt Creator should start automatically.

Click Tools->Options

Click Android (in the scroll panel)

In the Android Configurations tab:

Set the Android SDK Location by clicking Browse...

Browse to ~/develop/libs/android-sdk-linux, and click Open.

Set the Android NDK location by clicking Browse...

Browse to ~/develop/libs/android-ndk-

Click OK.

Note: the paths to Ant and Java should have been automatically found.

Running a Qt Example

Now we test an example application.

Click Examples

Click Qt Quick Demo – Clocks

In the Configure Project panel, we select only the stable release builds.:

• 
  Select Android for armeabi-v7a( e.g. GCC4.9, Qt 5.4)
  
• 
  Select Desktop Qt (e.g. 5.4)
  

Press Edit

Now we select the build type:

Select the Android Qt (e.g. 5.4) Kit (Release)

Press the Run button

Select the MyArm7 device. (Press refresh if this is not shown).

Click OK.

When the device has booted up, unlock the screen.

It may then take a few minutes to build and deploy to the device.

Final Note

This completes our How-To on installing Qt for Android on 64-bit Xubuntu.
Many developers prefer to run their Linux in a VM. Sadly, running the Android emulator in VirtualBox is fraught with difficulties, and although ARM7 devices may work in VMPlayer, it is very slow, and therefore practically unusable for any serious development work.
We recommend that you develop Android software on a Linux machine using an Android x86 Atom image, thereby allowing hardware and GPU acceleration to be turned on.

For more information, see: Use Android ICS Emulator for Ubuntu with KVM using Intel VT-x

Alternatively, use a real Android device (in developer mode) which is much faster.
Many Thanks,
Btoe

www.btoe.co.uk

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