ci: Test Android NDK matrix combinations

.github/workflows/continuous_integration.yml

@@ -144,56 +144,38 @@ jobs:
                   cd ../Test && bash runtests
 
     android:
-        runs-on: ${{matrix.os}}
+        runs-on: ubuntu-22.04
         strategy:
-            fail-fast: false
-            matrix:
-                os: [ubuntu-20.04]
-                compiler: [{cc: clang, cxx: clang++}]
-                cmake_build_type: [Release]
+          matrix:
+            # Android NDK currently offers 2 different toolchains.
+            # Test both to ensure we are compatible with either approach.
+            LEGACY: [ON, OFF]
+            # Oldest/newest NDK currently provided by GitHub runners
+            # https://github.com/actions/runner-images/blob/main/images/linux/Ubuntu2204-Readme.md#android
+            NDK: [23.2.8568313, 25.2.9519653]
         steps:
-            - uses: actions/checkout@v2
-            - uses: actions/setup-python@v2
+            - uses: actions/checkout@v3
+            - uses: actions/setup-python@v4
               with:
                   python-version: '3.7'
-            - name: Install Ubuntu Package Dependencies
-              if: ${{matrix.os == 'ubuntu-20.04'}}
-              run: |
-                  sudo apt-get -qq update
-                  sudo apt-get install -y clang-6.0
-            - name: Install Android NDK
-              run: |
-                  export ANDROID_NDK=$HOME/android-ndk
-                  git init $ANDROID_NDK
-                  pushd $ANDROID_NDK
-                  git remote add dneto0 https://github.com/dneto0/android-ndk.git
-                  git fetch --depth=1 dneto0 r17b-strip
-                  git checkout FETCH_HEAD
-                  popd
-            - name: Install GoogleTest
-              run: |
-                  # check out pre-breakage version of googletest; can be deleted when
-                  # issue 3128 is fixed
-                  # git clone --depth=1 https://github.com/google/googletest.git External/googletest
-                  mkdir -p External/googletest
-                  cd External/googletest
-                  git init
-                  git remote add origin https://github.com/google/googletest.git
-                  git fetch --depth 1 origin 0c400f67fcf305869c5fb113dd296eca266c9725
-                  git reset --hard FETCH_HEAD
-                  cd ../..
+            - uses: lukka/get-cmake@latest
+            - name: Setup ccache
+              uses: hendrikmuhs/ccache-action@v1.2
+              with:
+                  key: android-${{ matrix.LEGACY }}-${{ matrix.NDK }}
             - name: Update Glslang Sources
+              run: ./update_glslang_sources.py
+            - name: Configure
               run: |
-                  ./update_glslang_sources.py
-            - name: Build
+                cmake -S . -B build/ \
+                --toolchain $ANDROID_HOME/ndk/${{ matrix.NDK }}/build/cmake/android.toolchain.cmake \
+                -D CMAKE_BUILD_TYPE=Release \
+                -D ANDROID_ABI=armeabi-v7a \
+                -D ANDROID_USE_LEGACY_TOOLCHAIN_FILE=${{ matrix.LEGACY }} \
+                -D BUILD_TESTING=OFF
               env:
-                  CC: ${{matrix.compiler.cc}}
-                  CXX: ${{matrix.compiler.cxx}}
-              run: |
-                  export ANDROID_NDK=$HOME/android-ndk
-                  export TOOLCHAIN_PATH=$ANDROID_NDK/build/cmake/android.toolchain.cmake
-                  echo $ANDROID_NDK
-                  echo $TOOLCHAIN_PATH
-                  mkdir build && cd build
-                  cmake -DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN_PATH} -DANDROID_NATIVE_API_LEVEL=android-14 -DCMAKE_BUILD_TYPE=${{matrix.cmake_build_type}} -DANDROID_ABI="armeabi-v7a with NEON" -DBUILD_TESTING=OFF ..
-                  make -j4
+                CMAKE_GENERATOR: Ninja
+                CMAKE_C_COMPILER_LAUNCHER: ccache
+                CMAKE_CXX_COMPILER_LAUNCHER: ccache
+            - name: Build
+              run: cmake --build build/