Friendica is a great decentralized social network. For android smartphones there are several clients available. For example there is the Friendica App for Android and Mustard (a StatusNet/Twitter client that can also be used with Friendica). Now it is also possible to run Friendica with in my opinion the best Twitter client for Android available, called Twidere. In this short tutorial you will see, how do it:
Add the address of your friendica server plus /api, f.e. https://www.snarl.de/api if you have a user account on snarl.de.
Then choose Basic for Auth type.
Click Sign in.
Open your phone keyboard and dial *#*#8943373#*#*
to access a secret settings page of Twidere.
Note: On tablets you will need to use something like the SecretCodes Launcher. In this app you must enter the number only. Omit the *#*#-stuff.
On the secret settings page do the following:
Optional: Define a different text limit clicking on Tweet text limit as friendica is not limited to 140 characters as Twitter is.