Error while reading Edit Text content on Button click and displaying in a TextView

Question

I am implementing a fragment in a navigation drawer menu. I want to read the content of the edit text on clicking a button and display the read content in a text view. But, I am getting the following error: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View

Fragment class:

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

    editText = (EditText) getView().findViewById(R.id.id_editText);
    button = (Button) getView().findViewById(R.id.id_button);
    textView = (TextView) getView().findViewById(R.id.id_textView);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String Name = editText.getText().toString();
            textView.setText(Name);
        }
    });

    return inflater.inflate(R.layout.fragment_chat, container, false);

}

Fragment xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#566D7E"
tools:context="com.example.jr.mybluetoothchat.ChatFragment">


<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="textPersonName"
    android:text="Enter Text"
    android:ems="10"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="90dp"
    android:id="@+id/id_editText" />

<Button
    android:text="Click"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/id_editText"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="43dp"
    android:id="@+id/id_button" />

<TextView
    android:text="Entered Text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/id_button"
    android:layout_alignStart="@+id/id_editText"
    android:layout_marginStart="43dp"
    android:layout_marginTop="91dp"
    android:id="@+id/id_textView" />

Content Main xml

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/id_content_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#BCC6CC"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.example.jr.mybluetoothchat.MainActivity"
    tools:showIn="@layout/app_bar_main">


</RelativeLayout>

Main Activity

public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_home)
        {
            Toast.makeText(this,"Home",Toast.LENGTH_SHORT).show();
        } else if (id == R.id.nav_chat)
        {
            Toast.makeText(this,"Chat",Toast.LENGTH_SHORT).show();
            FragmentManager fragmentManager = getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            ChatFragment chatFragment = new ChatFragment();
            fragmentTransaction.replace(R.id.id_content_main,chatFragment);
            fragmentTransaction.commit();
        } else if (id == R.id.nav_invite)
        {
            Toast.makeText(this,"Invite",Toast.LENGTH_SHORT).show();
        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

View rootView = inflater.inflate(R.layout.fragment_layout, container, false); editText = (EditText) rootView.findViewById(R.id.id_editText); (In onCreateView) Try This — Mohd Asif Ahmed, Dec 21 '16 at 12:56
`getView()` always returns null inside onCreateView because it's that method that sets the view. There's nothing to get yet — OneCricketeer, Dec 21 '16 at 13:32

score 0 · Accepted Answer · answered Dec 21 '16 at 13:03

Change your this code

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

    editText = (EditText) getView().findViewById(R.id.id_editText);
    button = (Button) getView().findViewById(R.id.id_button);
    textView = (TextView) getView().findViewById(R.id.id_textView);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String Name = editText.getText().toString();
            textView.setText(Name);
        }
    });

    return inflater.inflate(R.layout.fragment_chat, container, false);

}

to this

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

    View view = inflater.inflate(R.layout.fragment_chat, container, false);
    editText = (EditText) view.findViewById(R.id.id_editText);
    button = (Button) view.findViewById(R.id.id_button);
    textView = (TextView) view.findViewById(R.id.id_textView);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String Name = editText.getText().toString();
            textView.setText(Name);
        }
    });

    return view;

}

@Meghna glad to know that. – Harshad Pansuriya Dec 21 '16 at 14:10 — Harshad Pansuriya, Dec 21 '16 at 14:10

Error while reading Edit Text content on Button click and displaying in a TextView

1 Answers1