function download() {
  if hash curl 2>/dev/null; then
    curl -L -o $2 $1
  elif hash wget 2>/dev/null; then
    wget -O $2 $1
  else
    echo >&2 "No supported download tool installed. Please get either wget or curl."
    exit
  fi
}

function installsdk() {
  PROXY_ARGS=""
  if [[ ! -z "$https_proxy" ]]; then
    PROXY_HOST="$(cut -d : "$https_proxy" -f 1,1)"
    PROXY_PORT="$(cut -d : "$https_proxy" -f 2,2)"
    PROXY_ARGS="--proxy=http --proxy_host=$PROXY_HOST --proxy_port=$PROXY_PORT"
  fi

  yes | $ANDROID_HOME/tools/bin/sdkmanager $PROXY_ARGS $@
}

function installAndroidSDK {
  TMP=/tmp/sdk$$.zip
  download 'https://dl.google.com/android/repository/tools_r25.2.3-linux.zip' $TMP
  unzip -d $HOME/android-sdk $TMP
  rm $TMP

  export ANDROID_HOME=$HOME/android-sdk
  export PATH="$ANDROID_HOME/platform-tools:$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin:$PATH"

  mkdir -p $ANDROID_HOME/licenses/
  echo > $ANDROID_HOME/licenses/android-sdk-license
  echo -n 8933bad161af4178b1185d1a37fbf41ea5269c55 > $ANDROID_HOME/licenses/android-sdk-license

  installsdk 'build-tools;23.0.2' 'build-tools;25.0.2' 'build-tools;25.0.1' 'platforms;android-23' 'platforms;android-25' 'ndk-bundle' 'extras;android;m2repository'
}