android.support.v5.app.Fragment or android.app.Fragment? -

im using android studio 1.0 rc1.

i have created mainactivity (tabbedactivity):

public class mainactivity extends actionbaractivity implements actionbar.tablistener 

it imports:

... import android.support.v4.app.fragment; ... 

so heres problem: ive made fragmentactivity:

public class blankfragment extends fragment { 

this on imports:

now want this:

public fragment getitem(int position) {     // getitem called instantiate fragment given page.     // return placeholderfragment (defined static inner class below).      switch (position){         case 0:             return scoutlogfragment.newinstance("a","b");         case 1:             return  blankfragment.newinstance("a", "b");         case 2:             return placeholderfragment.newinstance(position + 1);         default:             return placeholderfragment.newinstance(position + 1);      }  } 

but tells me:

"required: import android.support.v4.app.fragment; found : de.example.local.scouttools.blankfragment"

if change main activity import android.app.fragment; t tells me return type of getitem(int position) wrong.

i dont why 1 imports android.app.fragment , other android.support.app.v4.fragment, how fix that?

it depends devices runs fragments.

support v4 used support library.

it can imported in build.gradle

compile 'com.android.support:support-v4:21.0.0' 

if dont use support library devices android 3.0 or newer may use fragments.

if use support library devices @ least 2.1 can use fragments.

take care: if use support library app little big bigger in filesize.

make sure import proper fragment class support library. is

import android.support.v4.app.fragment; 

if device impor actionbar need support library v7.

the import

import android.support.v7.app.actionbaractivity; 

the required library can imported gradle with

compile 'com.android.support:appcompat-v7:21.0.0' 

oh, , blankfragment seems import wrong classes. validate uses v4 fragment in blankfragment class aswell.