The button in the fragment in my navigation drawer does not work. The application crashes

Question

The button in the fragment in my navigation drawer does not work. The application crashes.

I think the problem related to libraries import androidx.fragment.app.Fragment;

I want it to work when the button in my fragment is clicked.

2019-07-14 19:53:18.446 12619-12619/? E/alsix.doctorsi: Unknown bits set in runtime_flags: 0x8000
2019-07-14 19:53:19.136 12619-12682/com.medicalsix.doctorsix E/vndksupport: Could not load /vendor/lib/egl/libGLES_emulation.so from sphal namespace: dlopen failed: library "/vendor/lib/egl/libGLES_emulation.so" not found.
2019-07-14 19:53:19.136 12619-12682/com.medicalsix.doctorsix E/libEGL: load_driver(/vendor/lib/egl/libGLES_emulation.so): unknown
2019-07-14 19:53:19.696 12619-12681/com.medicalsix.doctorsix E/EGL_emulation: tid 12681: eglQueryString(923): error 0x3008 (EGL_BAD_DISPLAY)
2019-07-14 19:53:22.100 12619-12619/com.medicalsix.doctorsix E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.medicalsix.doctorsix, PID: 12619
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
        at com.medicalsix.doctorsix.First.onCreateView(First.java:40)
        at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2439)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1460)
        at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
        at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:802)
        at androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
        at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
        at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
        at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
        at androidx.fragment.app.FragmentManagerImpl$1.run(FragmentManager.java:733)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7116)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:925)

Please edit your question to create a Minimal, Reproducible Example. Read [How to create a Minimal, Reproducible Example](https://stackoverflow.com/help/minimal-reproducible-example) — nimi0112, Jul 14 '19 at 18:51

Roman · Accepted Answer · 2019-07-17T17:23:43.637

0

You have to change your code base like below:

    View view = inflater.inflate(R.layout.fragment_first, container, false);
    button = view.findViewById(R.id.button);
    text = view.findViewById(R.id.text);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

        }
    });
    return view;

edited Jul 17 '19 at 17:23

answered Jul 14 '19 at 19:00

Roman

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Hello Roman, your answer worked, thank you. I made some additions. The application crashed again. Sounds like a simple problem, please help me again. – user606 Jul 14 '19 at 19:32
button = view.findViewById(R.id.button); text = view.findViewById(R.id.text); – Roman Jul 17 '19 at 17:24

The button in the fragment in my navigation drawer does not work. The application crashes

1 Answers1