Karin (花梨) is a Twitter client for Android.
You have to create app/src/main/res/values/oauth.xml that contains Twitter OAuth consumer key and consumer secret.
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="twitter_consumer_key">TWITTER_CONSUMER_KEY</string>
<string name="twitter_consumer_secret">TWITTER_CONSUMER_SECRET</string>
</resources>