Converting Activity to Fragment

Question

I am converting an activity to a fragment so that I can use it within the Android Studio Navigation Drawer template.

I have changed all my activities to extend from fragment, and ensured that I am importing v4 support for fragments.

I have resolved most of the issues that Android Studio has raised...but I am really stuck on the final issue:

I have a fragment that used to be the mainActivity (now called liveview_fragment.java), which calls a class called ApplicationController in a file called ApplicationController.java. However, the line in liveview_fragment that calls ApplicationController gives the following error:

screenshot of error

I am new to android/java, with most of my learning coming from tutorials and trial/error. Please could someone point out what I have missed in order to resolve this issue?

Thanks

Your ApplicationController constructor expects an Activity, but you're passing a Fragment to it. — earthw0rmjim, Sep 24 '16 at 20:45
Also, please post some code, including the constructor for ApplicationController and the code where you create an instance of it. — Code-Apprentice, Sep 24 '16 at 20:45

score 0 · Answer 1 · answered Sep 24 '16 at 20:45

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You'll probably need to pass a context to the ApplicationController. Try with getActivity() or getContext() instead of this

answered Sep 24 '16 at 20:45

quiro

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score 0 · Answer 2 · answered Sep 24 '16 at 20:46

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The problem is that liveview_fragment is now a Fragment instead of an Activity. In order to get the hosting Activity, you can call getActivity(). This will probably fix the error.

answered Sep 24 '16 at 20:46

Code-Apprentice

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score 0 · Answer 3 · edited May 23 '17 at 10:27

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Always use the getActivity() method to get the context of your attached activity, but always remember one thing: Fragments are slightly unstable and getActivity returns null some times, so for that, always check the isAdded() method of fragment before getting context by getActivity() refer Using context in a fragment

edited May 23 '17 at 10:27

Community

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answered Sep 24 '16 at 21:21

Pallav Grover

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Converting Activity to Fragment

3 Answers3