源码

SDL使用版本是SDL2-2.0.3（找了许久才找到的SDL2-2.0.3-Android文档类资源-CSDN下载）

NDK版本是android-ndk-r20

编译脚本

在SDL2-2.0.3/build-scripts下新建androidbuildlibs.sh，也可拷贝SDL2-2.0.14/build-scripts下的androidbuildlibs.sh，因为我们只想编译libSDL2，所以需要将APP_MODULES修改为“APP_MODULES="SDL2"”

# Android.mk is in srcdir
srcdir=`dirname $0`/..
srcdir=`cd $srcdir && pwd`
cd $srcdir
echo $srcdir  "---------------------"


#
# Create the build directories
#

build=build
buildandroid=$build/android
obj=
lib=
ndk_args=

# Allow an external caller to specify locations.
for arg in $*
do
  if [ "${arg:0:8}" == "NDK_OUT=" ]; then
    obj=${arg#NDK_OUT=}
  elif [ "${arg:0:13}" == "NDK_LIBS_OUT=" ]; then
    lib=${arg#NDK_LIBS_OUT=}
  else
    ndk_args="$ndk_args $arg"
  fi
done

if [ -z $obj ]; then
  obj=$buildandroid/obj
fi
if [ -z $lib ]; then
  lib=$buildandroid/lib
fi

for dir in $build $buildandroid $obj $lib; do
    if test -d $dir; then
        :
    else
        mkdir $dir || exit 1
    fi
done


# APP_* variables set in the environment here will not be seen by the
# ndk-build makefile segments that use them, e.g., default-application.mk.
# For consistency, pass all values on the command line.
ndk-build \
  NDK_PROJECT_PATH=null \
  NDK_OUT=$obj \
  NDK_LIBS_OUT=$lib \
  APP_BUILD_SCRIPT=Android.mk \
  APP_ABI="armeabi-v7a arm64-v8a x86 x86_64" \
  APP_PLATFORM=android-16 \
  APP_MODULES="SDL2" \
  $ndk_args