set your RTMP url in local.properties
## This file is automatically generated by Android Studio.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must *NOT* be checked into Version Control Systems,
# as it contains information specific to your local configuration.
#
# Location of the SDK. This is only used by Gradle.
# For customization when using a Version Control System, please read the
# header note.
#Sat Feb 03 15:58:12 JST 2018
ndk.dir=/Users/takusemba/Library/Android/sdk/ndk-bundle
sdk.dir=/Users/takusemba/Library/Android/sdk
streaming_url = your rtmp url