findViewById marked red

Question

why is the word findViewById red ? i made a tabbed activity and this is one of the 3 screens that you can switch to.

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    AdView mAdView = (AdView) findViewById(R.id.adView);
    AdRequest adRequest = new AdRequest.Builder().build();
    mAdView.loadAd(adRequest);

    View rootView = inflater.inflate(R.layout.thekairi78, container, false);
    return rootView;
}

Now the rootView is red – Quentin Mayer Jun 16 '17 at 16:25 — Quentin Mayer, Jun 16 '17 at 16:25

score 2 · Answer 1 · answered Jun 16 '17 at 16:30

2

findViewById is a method of View or Activity, it cannot be called directly in fragments.

Corrected code:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.thekairi78, container, false);  
    AdView mAdView = (AdView) rootView.findViewById(R.id.adView);
    AdRequest adRequest = new AdRequest.Builder().build();
    mAdView.loadAd(adRequest);

    return rootView;  
}

Try to not only use this, but to understand why this change has to be made. It'll help you in further developing.

answered Jun 16 '17 at 16:30

F43nd1r

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Thanks but now the app crash i can't even launch it – Quentin Mayer Jun 16 '17 at 16:35
That means you're doing something fundamentally wrong. Debug your code. – F43nd1r Jun 16 '17 at 16:36
i did it and dat change nothing – Quentin Mayer Jun 16 '17 at 16:40
1

you don't seem to know what that means. Read some tutorials – F43nd1r Jun 16 '17 at 16:41
lol. @Quentin Mayer post your error log at least so we can help you better. – wick.ed Jun 16 '17 at 16:42
06-16 18:58:23.107 18929-18929/com.hendek.quentin.theapplication78 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.hendek.quentin.theapplication78, PID: 18929 java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.ads.AdView.loadAd(com.google.android.gms.ads.AdRequest)' on a null object reference – Quentin Mayer Jun 16 '17 at 17:00

findViewById marked red

1 Answers1