andy-tai/bgfx-android-activity

Android glue for bgfx

bgfx android activity - Android glue for bgfx

A minimal Android Activity using NativeActivity class which allows to run bgfx's examples onto Android platforms.

Prerequisites

Remark: Although those build instructions assume a linux platform to generate the APKs, the used tools are available for OSX and MSWindows. As a result, the specified commands should be easily adapted to work for those platforms.

Android Studio

This project uses Android Studio build system, Gradle, to generate Android's APK files, so you need to download it and install it properly. Android Studio comes with Android SDK, so no need to install it separatly.

Following commands assume it was installed to ~/android/android-studio directory.

Android NDK

Android NDK is required to compile bgfx for android platforms:

chmod +x ./android-ndk-r10e-linux-x86_64.bin
./android-ndk-r10e-linux-x86_64.bin

Following commands assume it was installed to ~/android/android-ndk-r10e directory.

Environment variables

sudo gedit /etc/profile.d/ndk.sh

Add the following lines:

export ANDROID_NDK_ROOT=~/android/android-ndk-r10e
export ANDROID_NDK_ARM=$ANDROID_NDK_ROOT/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
export ANDROID_NDK_MIPS=$ANDROID_NDK_ROOT/toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64
export ANDROID_NDK_X86=$ANDROID_NDK_ROOT/toolchains/x86-4.9/prebuilt/linux-x86_64

You can also extend the PATH variable to be able to access Android platform tools (adb, dmtracedump, etc) from the shell:

export ANDROID_SDK_ROOT=~/android/sdk
export PATH=$PATH:$ANDROID_SDK_ROOT/platform-tools

You may need to reboot in order to reload those environment variables.

Setup project

Clone repositories

mkdir bgfx-android
cd bgfx-android
clone https://github.com/bkaradzic/bx.git
clone https://github.com/bkaradzic/bgfx.git
clone https://github.com/nodrev/bgfx-android-activity.git

Compile

Compile BGFX samples for every android abi we want to support:

cd bgfx
make
make android-arm & make android-mips & make android-x86

Build APK

Copy bgfx files

Copy the libraries corresponding to the bgfx sample you want to try to the jniLibs directory.

cp ./build/android-arm/bin/libexample-00-helloworldRelease.so ../bgfx-android-activity/app/src/main/jniLibs/armeabi-v7a
cp ./build/android-mips/bin/libexample-00-helloworldRelease.so ../bgfx-android-activity/app/src/main/jniLibs/mips
cp ./build/android-x86/bin/libexample-00-helloworldRelease.so ../bgfx-android-activity/app/src/main/jniLibs/x86

Import the project to Android Studio

TODO Launch android studio, and import the project.

Modify application ID

Edit bgfx-android-activity/app/build.gradle, and replace applicationId with your own application id:

    defaultConfig {
        applicationId 'com.nodrev.bgfx.examples.helloworld'
        minSdkVersion 14
        targetSdkVersion 23
        versionCode 100 // Application version, 3 digits, major/minor/revision
        versionName "1.0.0"
    }

Edit bgfx-android-activity/app/src/main/AndroidManifest.xml, and set package value to the same application id:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.nodrev.bgfx.examples.helloworld">
    [...]
</manifest>

Modify application name

Edit bgfx-android-activity/app/src/main/res/values/strings.xml, and replace app_name value with your application name

<resources>
    <string name="app_name">BGFX Helloworld</string>
</resources>

Define the library name

To define the .so file to load by the native activity, you have to edit bgfx-android-activity/app/src/main/AndroidManifest.xml

<activity android:name="android.app.NativeActivity"
    <!-- Tell NativeActivity the name of our .so (strip 'lib' and '.so') -->
    <meta-data android:name="android.app.lib_name"
               android:value="example-00-helloworldRelease" />
</activity>

## Examples resource files Some examples requires resource files, you will need to copy them to the Android device (physical or emulator) SDCard using adb:

adb push bgfx/examples/runtime /sdcard/bgfx/examples/runtime

Remark: This is not the official way to do for a real application, runtime files should be embedded into APK, but for bgfx examples, we go that way.

Packaging

Rebuild the project, build APK, and test the application!

Remark: Generated APKs goes to bgfx-android-activity/app/build/outputs/apk directory.

License (BSD 2-clause)

Copyright 2016 Jean-François Verdon. All rights reserved.

https://github.com/nodrev/bgfx-android-activity

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
EVENT SHALL COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.