NDK compiles SDL

NDK compiles SDL

Get ready:

Hardware

a computer, experiment in Lenovo T430 on

a Android device, experiment at Samsung S3/a7

Compilation Environment:

Ubuntu 14.04 (Ant\java and other commands must be supported )

Tool Kit:

NDK:https://dl.google.com/android/ndk/android-ndk32-r10b-linux-x86_64.tar.bz2

SDK:https://dl.google.com/android/adt/adt-bundle-linux-x86_64-20140702.zip

SDL:http://www.libsdl.org/release/SDL2-2.0.3.tar.gz

Steps:

Unzip Sdl:

Tar-xvzfsdl2-2.0.3.tar.gz

cd~/work/study/ffmpeg/sdl2-2.0.3

Unzip NDK,SDK

SDK Path:/opt/adrd-stuff/adt-bundle-linux-x86_64-20130514/sdk

NDK Path:/opt/adrd-stuff/android-ndk-r10b

the compilation process is simple and has the following two ways: (Please read carefully Sdl2-2.0.3/readme-android.txt)

1. Compile An example of SDL directly:

2. define an APK yourself

1. Direct compilation of an example within SDL, two steps:

(1). Configure The two paths in the build-scripts/androidbuild.sh as follows:

#NDKBUILD = ' Whichndk-build '

Ndkbuild= "/opt/adrd-stuff/android-ndk-r10b/ndk-build"

#ANDROID = ' whichandroid '

Android= "/USR/LOCAL/SHARE/ADT-BUNDLE-LINUX-X86_64-20140702/SDK"

(2). Run commands directly

CD build-scripts

./androidbuild.shorg.libsdl.testgles. /test/testgles.c

2. define an APK yourself

cdandroid-project/jni/src/

in the test/testgles.c, write a c file containing the main function yoursourcehere.c

The experiment can be copied directly , executing the following command sequentially:

# # #pwd: android-project/jni/src/

Cp.. /.. /.. /TEST/TESTGLES.C yoursourcehere.c

Cd.. /jni

ln-s/home/zhou/work/study/ffmpeg/sdl2-2.0.3/sdl

/opt/adrd-stuff/android-ndk-r10b/ndk-build

Cd..

Ant Debug

this will be in bin/

Run APK:

ADB install: /sdl2-2.0.3/build/org.libsdl.testgles/bin/org.libsdl.testgles-debug.apk

ADB install: /sdl2-2.0.3/android-project/bin/sdlactivity-debug.apk

At this point you can see a rotating colored square, as follows

Problems encountered:

NDK version:

32bits for small machine:android-ndk32-r10b-linux-x86_64.tar.bz2

64bits for small machine:android-ndk64-r10b-linux-x86_64.tar.bz2

64bits compiled APK on the S3 run, there will be a flashback phenomenon,

Logcat tips are as follows:

E/DALVIKVM (15444):d lopen ("/data/app-lib/org.libsdl.app-1/libsdl2.so") Failed:dlopen Failed:cannot Locate symbol " Signal "referenced by" libsdl2.so "...

W/DALVIKVM (15444): Exception ljava/lang/unsatisfiedlinkerror; Thrown while initializinglorg/libsdl/app/sdlactivity;

W/DALVIKVM (15444): Class Init failed in newinstance call (lorg/libsdl/app/sdlactivity;)

E/androidruntime (15444):P Rocess:org.libsdl.app, pid:15444

E/androidruntime (15444): at Org.libsdl.app.sdlactivity.<clinit> (sdlactivity.java:49)

W/activitymanager (837): Force finishing Activity org.libsdl.app/. Sdlactivity

NDK compiles SDL