Getting error "cannot resolve findViewById(int)'

android, android-fragments, button

Solution

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class laundry extends Fragment {
Button btn_service;
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub 
final View rootView = inflater.inflate(R.layout.activity_laundry, container,
                false);

    btn_service = (Button) rootView.findViewById(R.id.btn_service);
    btn_service.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

         //your Code Goes Here    
        }
    });
    return rootView;
}

Problem

I have a main activity and when I press a button, i am navigated to a swipe Tab view. Now I want to have a Clickable Button in these tabs and present a toast when the button is pressed. Here is the code I use: ``` import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; public class laundry extends Fragment { Button btn_service; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub return inflater.inflate(R.layout.activity_laundry, container,false); btn_service = (Button) findViewById(R.id.btn_service); btn_service.setOnClickListener(this); } ``` But the findViewById is not a know symbol to this activity. Is there an alternative way to incorporate clickable buttons in fragment activity like above? Ran the project and I get this error. ( I cant know if the suggested changes worked, my app crashed with the following error) This is a fragment activity and I am trying to generate a toast when a button is clicked. ``` public class in_room_dining extends Fragment { Button btn_order; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub btn_order.setOnClickListener(new OnClickListener() { public void onClick(View v) { Toast.makeText(getActivity(), "text", Toast.LENGTH_SHORT).show(); } }); return inflater.inflate(R.layout.activity_in_room_dining, container, false); } } ``` The error I got is : ``` 11-29 10:57:42.820 938-938/com.appt.shreyabisht.staymax E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.appt.shreyabisht.staymax, PID: 938 java.lang.NullPointerException at com.appt.shreyabisht.staymax.in_room_dining.onCreateView(in_room_dining.java:23) at android.support.v4.app.Fragment.performCreateView(Fragment.java:1504) ``` (in_room_dining.java:23) is btn_order.setOnClickListener(new OnClickListener()

Original source