add sdk android without android studio

android_sdk.sh

#!/bin/bash

mkdir -p /opt/android/sdk && \
wget https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip -O tools.zip && \
unzip tools.zip -d /opt/android/sdk && \
rm tools.zip

# Set environment variable
echo #skd android > ~/.zprofile
echo export ANDROID_SDK_ROOT=/opt/android/sdk > ~/.zprofile
echo export ANDROID_HOME=$ANDROID_SDK_ROOT > ~/.profile
echo export PATH="$ANDROID_SDK_ROOT/tools/bin:$PATH" > ~/.zprofile
echo export PATH="$ANDROID_SDK_ROOT/platform-tools:$PATH" > ~/.zprofile

export ANDROID_SDK_ROOT=/opt/android/sdk 
export ANDROID_HOME=$ANDROID_SDK_ROOT

$ANDROID_HOME/tools/bin/sdkmanager --licenses && \
$ANDROID_HOME/tools/bin/sdkmanager "tools" "platform-tools" && \
$ANDROID_HOME/tools/bin/sdkmanager "build-tools;28.0.3" "build-tools;27.0.3" && \
$ANDROID_HOME/tools/bin/sdkmanager "platforms;android-28" "platforms;android-27" && \
$ANDROID_HOME/tools/bin/sdkmanager "extras;android;m2repository" "extras;google;m2repository"