ActionBarActivity cannot be resolved to a type

Question

I am new to android-programming  I am following this tutorial to add an ActionBar to my Main Activity using the explanation in the  Support Android 2 1 and Above  section   I followed this tutorial to add a Library-Project  Then after adding the library  at the point  Add the library to your application project  I felt lost    basically because I don t have the  add  option by itself in my Eclipse     however I clicked on  add library  and moved on     now when I change Activity to ActionBarActivity    public class MainActivity extends ActionBarActivity           in my mainActivity java   it gives me error  a red line bellow the ActionBarActivity and  all methods  names and some functions     and again when i change    lt activity android theme   style Theme AppCompat Light       gt    in the Manifest  it also give me an error saying   No resource found that matches the given name     I am totally lost    what did I do wrong

User · Answer

Check if you have a android-support-v4 jar file in YOUR project s lib folder  it should be removed   In the tutorial  when you have followed the instructions of Adding libraries WITHOUT resources before doing the coorect Adding libraries WITH resources you ll get the same error    Don t know why someone would do something like that  lookingawayfrommyself       So what did fix it in my case  was removing the android-support-v4 jar from YOUR PROJECT  not the android-support-v7-appcompat project   since this caused some kind of library collision  maybe because in the meantime there was a new version of the suport library    Just another case  when this error might shows up

User · Answer

I got the same problem  but things got complicated when I added few other libraries like appcompat v7  recyclerView  CardView   Removing appcompat v4 from lib did not work for me   I had to create project from start and first step I did is to remove appcompat v4 from libs folder  and this worked   I had just started the project so creating a new project wasn t a big issue for me

User · Answer

It does not sound like you imported the library right especially  when you say at the point Add the library to your application project  I felt lost    basically because I don t have the  add  option by itself    however I clicked on  add library  and moved on     in eclipse you need to right click on the project  go to Properties  select Android in the list then Add to add the library  follow this tutorial in the docs  http   developer android com tools support-library setup html

User · Answer

This way work for me with Eclipse in Android developer tool from Google  -righ click - property - java build path - add external JAR  point to  android-support-v7-appcompat jar in  sdk extras android support v7 appcompat libs  Then   import android support v7 app ActionBarActivity

User · Answer

I was also following the instructions on http   developer android com training basics actionbar setting-up html  and even though I did everything in the tutorial  as soon as  extends Action  is changed to  extends ActionBarActivity  all sorts of errors appear in Eclipse  including the  ActionBarActivitycannot be resolved to a type   None of the above solutions worked for me  but what did work is adding this line to the top   import android support v7 app ActionBarActivity

User · Answer

Add this line to dependencies in build gradle   dependencies   compile  com android support appcompat-v7 18 0        Reference

User · Answer

UPDATE   Since the version 22 1 0  the class ActionBarActivity is deprecated  so instead use AppCompatActivity  For more details see here  Using ActionBarActivity      In Eclipse    1 - Make sure library project appcompat v7  is open  amp  is proper referenced  added as library  in your application project   2 - Delete android-support-v4 jar from your project s libs folder if jar is present    3 - Appcompat v7 must have android-support-v4 jar  amp   android-support-v7-appcompat jar inside it s libs folder      If jars are not present copy them from  sdk extras android support v7 appcompat libs folder of your installed      android sdk location   4- Check whether ActionBarActivity is properly imported    import android support v7 app ActionBarActivity       In Android Studio   Just add compile dependencies to app s build gradle  dependencies       compile fileTree dir   libs   include      jar        compile  com android support appcompat-v7 22 1 1

User · Answer

For Eclipse  modify project properties like this   your path please   android library reference 1             workspace appcompat v7 22   And remove android-support-v4 jar file in your project s libs folder

User · Answer

Instead of copy pasting the code from the tutorial  use the code suggestion in the IDE  Start typing  extends ActionBar     it will propose  ActionBarActivity  click enter  It worked for me

User · Answer

There is a mistake in your  andrroid-sdk  folder  You selected some features while creating new project which need some components to import  It is needed to download a special android library and place it in android-sdk folder  For me it works fine   1-Create a folder with name extras in your android-sdk folder 2-Create a folder with name android in extras 3-Download  this file  In my case I need this library  4-Unzip it and copy the content  support folder  in the current android folder 5-close Eclipse and start it again 6-create your project again  I hope it to work for you

[java] ActionBarActivity: cannot be resolved to a type

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