Move android and rpi examples to others

examples/others/android/example/README.md

@@ -0,0 +1,36 @@
+### Android example
+
+To compile example to shared library you will need [Android NDK](https://developer.android.com/ndk/downloads/index.html).
+To build Android apk you will need [Android SDK](http://developer.android.com/sdk/index.html#Other).
+
+Export path to Android NDK, point to location where you have unpacked archive:
+
+    export ANDROID_NDK_HOME=/opt/android-ndk
+
+Add toolchain bin directory to PATH:
+
+    export PATH=${ANDROID_NDK_HOME}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin:${PATH}
+
+Export sysroot path:
+    
+    export ANDROID_SYSROOT=${ANDROID_NDK_HOME}/platforms/android-16/arch-arm
+
+And compile shared library:
+
+    CC=arm-linux-androideabi-gcc \
+    CGO_CFLAGS="-I${ANDROID_SYSROOT}/usr/include --sysroot=${ANDROID_SYSROOT}" \
+    CGO_LDFLAGS="-L${ANDROID_SYSROOT}/usr/lib --sysroot=${ANDROID_SYSROOT}" \
+    CGO_ENABLED=1 GOOS=android GOARCH=arm \
+    go build -buildmode=c-shared -ldflags="-s -w -extldflags=-Wl,-soname,libexample.so" \
+    -o=android/libs/armeabi-v7a/libexample.so
+
+To build apk export path to Android SDK, point to location where you unpacked archive:
+
+    export ANDROID_HOME=/opt/android-sdk
+
+And build apk with ant:
+
+    cd android
+    ant clean debug
+
+If everything is successfully built apk can be found in bin/ directory.