java.lang.NullPointerException Error when trying to set and editText widget

Question

I have a strange error, I get NullPointerException error when I set text to EditText. Code is something like below:

EditText editTxt;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    editTxt = (EditText) findViewById(R.id.edtTxt);
    if(someCondition) {
        if (editTxt!=null)
            editTxt.setText("HelloWorld");
        }
    }
}

Post your logcat please.

Ghost
– Ghost

2012-02-07 10:59:02 +00:00
Commented Feb 7, 2012 at 10:59 — Ghost
– Ghost, Commented Feb 7, 2012 at 10:59
Post your layout and Exception log please.

Shaiful
– Shaiful

2012-02-07 10:59:10 +00:00
Commented Feb 7, 2012 at 10:59 — Shaiful
– Shaiful, Commented Feb 7, 2012 at 10:59
Please post the original code.

ndeverge
– ndeverge

2012-02-07 11:01:21 +00:00
Commented Feb 7, 2012 at 11:01 — ndeverge
– ndeverge, Commented Feb 7, 2012 at 11:01

Tofeeq Ahmad · Accepted Answer · 2012-02-07 11:01:33Z

1

in this small code,There should be one Error only

    editTxt = (EditText)findViewById(R.id.edtTxt);

that your id in xml doesnot match with edtTxt.If yes then try to clean it once then run

answered Feb 7, 2012 at 11:01

Tofeeq Ahmad

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4 Comments

Karthik Over a year ago

there is a check for if(editTxt!=null), so it should not cause the exception.

Tofeeq Ahmad Over a year ago

when you will setValue then it gave exception.If you check it it did not satisfy null condition if(editTxt!=null)

Manju Over a year ago

//Got it working like this, String hello = "HelloWorld!"; EditText editTxt; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); editTxt = (EditText)findViewById(R.id.edtTxt); if(someCondition) {if(editTxt!=null) editTxt.setText(hello); } }

Tofeeq Ahmad Over a year ago

so that means there was not error.Will you consider to accept this answer?

duffymo · Accepted Answer · 2012-02-07 11:00:46Z

0

The object that's cited in the stack trace wasn't initialized. You never asked it to point to a new object on the heap.

I'm putting my money on that reference R. I don't see where that's initialized.

answered Feb 7, 2012 at 11:00

duffymo

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Comments

Sergei Glotov · Accepted Answer · 2012-02-07 13:20:30Z

0

Please try this code:

EditText editTxt = (EditText) findViewById(R.id.text);

if (editTxt!=null) {
    editTxt.setText("HelloWorld");
}

edited Feb 7, 2012 at 13:20

Sergei Glotov

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answered Feb 7, 2012 at 11:28

Nitesh Khosla

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Comments

Manju · Accepted Answer · 2012-02-08 15:17:51Z

0

//Got it working like this, 
String hello = "HelloWorld!"; 
EditText editTxt; 
@Override public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    editTxt = (EditText)findViewById(R.id.edtTxt); 
    if(someCondition) {
        if(editTxt!=null) editTxt.setText(hello); 
    } 
}

answered Feb 8, 2012 at 15:17

Manju

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1 Comment

Manju Over a year ago

No clue why string constant entered directly was not working thou !!

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