Start a FragmentActivity from a normal Activity.. java.lang.NoClassDefFoundError

Question

I am trying to start a FragmentActivity from a normal Activity, and I get this java.lang.NoClassDefFoundError in log, while the app crashes.

Should I change anything in manifest to be able to use a FragmentActivity in my app?

Has anyone else come across this error? How did you fix it?

happened to me. Targeting an Api level > of the Api level of the device where I tested. Do you use the compatibility library? — Blackbelt, Sep 26 '12 at 14:25
@blackbelt. Yes..I use compatibility lib.. app's minsdk version is 8.. — Ron, Sep 26 '12 at 14:51
Check your import. Be sure they are all coming from the compatibility library — Blackbelt, Sep 26 '12 at 14:52
@blackbelt Yes I added the library to lib folder and added to build path.. — Ron, Sep 26 '12 at 14:54
Check that you are importing all from android.support.v4.app.* and not from android.app.Fragment — Blackbelt, Sep 26 '12 at 14:57
@userSeven7s hey, did u find a solution for this? Can u pls share?? — Adarsh H S, May 23 '13 at 13:31

score 1 · Answer 1 · answered Sep 26 '12 at 15:39

1

Maybe is a stupid hint. But are you sure to have inserted the FragmentActivity into your Manifest file?

If so try to insert this into manifest:

<uses-sdk
    android:minSdkVersion="4"
    android:targetSdkVersion="8" />

answered Sep 26 '12 at 15:39

Oibaf it

score 0 · Answer 2 · edited May 23 '17 at 11:48

0

Please update the sdk tools. It should solve the problem.

edited May 23 '17 at 11:48

Community

answered Nov 21 '12 at 02:06

user802467

To be more precise, this is the combination that solved the issue for me (latest software downloads on Nov 21, 2012): sdk-tools rev 21, platform-tools rev 16, support-library rev 11. I also had to add below change in the .classpath file: – user802467 Nov 22 '12 at 02:48

score 0 · Answer 3 · edited Oct 27 '13 at 03:56

0

The android-support-v4 library contains a bug.

So, make a new project with android version 4.2.2. Copy the file which is android-support-v4.jar, and paste in your project.

I solve the problem this way!

edited Oct 27 '13 at 03:56

Radim Köhler

answered Oct 27 '13 at 03:35

AmazingRed

3 Answers3