Null pointer exception for TextView?

Asked Apr 22 '16 at 13:08

Active Apr 22 '16 at 13:26

Viewed 63 times

So i'm trying to display a TextView whenever a user clicks an item on a ListView. However, when i click a list item, i get this error...

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference.

What causes this to occur in regards to "TextViews" specifically and are there any possible solutions to solving it? Thanks.

Update

Here's how i set the TextViews..

Activity

@Override
public void onTextFooterListener(String String1, String String2) {

    tab1.setLabels(String1, String2);

}

Tab1Fragment

public void setLabels(String mString1, String mString2) {

    title1 = mString1;
    title2= mString2;

    title1Footer.setText(title1);
    title2Footer.setText(title2);
    updateTimerLabel();
}

TextViews

title1Footer= (TextView) rootView.findViewById(R.id.title1_footer);
title2Footer= (TextView) rootView.findViewById(R.id.title2_footer);

tab1 is declared as public Tab1Fragment tab1 = new Tab1Fragment();

If i comment out the onTextFooterListener, the code seems to work just fine...

edited Jun 20 '20 at 09:12

Community

asked Apr 22 '16 at 13:08

Jamie Smith

you have not initialized the textView...... – Opiatefuchs Apr 22 '16 at 13:09
Please post the relevant code. – Prerak Sola Apr 22 '16 at 13:10
just do like this TextView.setText(""+yourtext) and check if it returns null – Mahesh Giri Apr 22 '16 at 13:10
just debug it and see what you are passing on the textview – Saurabh Vardani Apr 22 '16 at 13:13
@NongthonbamTonthoi...I think you can not say it is duplicate one...ya..i know...Exception is same but the situation is different... – Saurabh Vardani Apr 22 '16 at 13:15
I've updated the post – Jamie Smith Apr 22 '16 at 13:16
you are setting string to textview using textview.setText(YOUR STRING)...But string is null.. So that NullPointerException is occurring. Check your String Data and also check if your textview is initialized or not. Hope it will help :) – Onkar Nene Apr 22 '16 at 13:18
If you comment out the onTextFooterListener means you are not calling the function setLables...Try to debug and check what values you are getting in setLabels method – Saurabh Vardani Apr 22 '16 at 13:18
Post your code where you declare 'tab1' – Joel Min Apr 22 '16 at 13:18
Actually the error is saying that your `TextView` is null, not the string. It means that you don't initialize the `TextView` or initialize it in a wrong way, please paste the code where you initialize the `TextView` – Max Zavernutiy Apr 22 '16 at 13:19
Check the post. Thanks. – Jamie Smith Apr 22 '16 at 13:25

Null pointer exception for TextView?

Update

0 Answers0