no suitable method found for findViewById(TextView)

Question

Error:(43, 35) error: no suitable method found for findViewById(TextView) method Activity.findViewById(int) is not applicable (argument mismatch; TextView cannot be converted to int) method AppCompatActivity.findViewById(int) is not applicable (argument mismatch; TextView cannot be converted to int)

Why this error occurred in this code:

 lblName = (TextView) findViewById(lblName);
 lblEmail = (TextView) findViewById(lblEmail);

Are you using Activity or Fragment? For activity, you need to call `setContentView()` and for Fragment, you need to use LayoutView returned by `onViewCreated()` : `returnedLayout.findViewById(...)` — rupinderjeet, Jan 14 '17 at 15:14
No i am use this textView in nav_header.xml file so how i can use this @rupinderjeet @K Neeraj Lal — NewDev, Jan 14 '17 at 15:27
You need to inflate layouts with LayoutInflator unless `nav_header.xml` is an xml preference file. — rupinderjeet, Jan 14 '17 at 15:33
Are those `TextView`s in a `NavigationView` header layout? http://stackoverflow.com/questions/33194594/navigationview-get-find-header-layout — Mike M., Jan 14 '17 at 15:57

K Neeraj Lal · Answer 1 · 2017-01-14T15:09:30.333

1

The argument of findViewById should be an id like R.id.id_in_xml. You are passing a variable that is already defined as TextView as an argument of findViewById, hence the error.

You should write it as follows.

lblName = (TextView) findViewById(R.id.lblName);
lblEmail = (TextView) findViewById(R.id.lblEmail);

I'm not sure of the ids, you may have to change it.

Also Make sure the id is right and the TextView exists in the xml file. If it doesn't you will run into a NullPointerException.

edited Jan 14 '17 at 15:09

answered Jan 14 '17 at 15:03

K Neeraj Lal

6,768
3
24
33

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference its show this error – NewDev Jan 14 '17 at 15:06
In your TextView, define an ID : `android:id="@+id/lblName"` – rupinderjeet Jan 14 '17 at 15:09
Yes i done that its shows this --- java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference – NewDev Jan 14 '17 at 15:09
– NewDev Jan 14 '17 at 15:12

score 0 · Answer 2 · answered Jan 14 '17 at 16:01

0

You need to write- Name = (TextView)findviewbyid(R.id.name);

So just right R.id before sepicifying the Id name

answered Jan 14 '17 at 16:01

AshAR

228
1
14

no suitable method found for findViewById(TextView)

2 Answers2