Error incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager

Question

Error Error incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager is drving me nuts.

In my app,

Answer 1

Change

import android.app.Fragment;
import android.app.FragmentManager;

to

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;

in every class. you are facing problems because in your Fragment creation class you are using support v4 fragment and in your MainActivity class you are inflating as a simple fragment.

You also need to change getFragmentManager() to getSupportFragmentManager(), and make sure they're extending a FragmentActivity class.

Hope it will help you.