findViewById(int id) is a method of the View and Activity classes. This method will take a resource Id usually in the form of R.id.mView and will return to you a View object that is a reference to that View. Note that the returned object will nearly always need to be cast to the correct type of View before you can start interacting with it. If a View by the given ID does not exist within the current activity or parent View then you will receive null.
Questions tagged [findviewbyid]
563 questions
-2
votes
2 answers
returns an object or a refrence to object
Does findViewById() and inflate() return a view object or "view reference" ?,
asking because we do
LinearLayout linear=(LinearLayout)inflate(R.layout.main,null);
So if inflate return view Object ,and view is parent of LinearLayout the how can…

Asim Khan
- 51
- 6
-2
votes
1 answer
How to pass a variable to findViewById method using classes and instances?
I've been trying to make this tic-tac-toe game on android studios recently, I only have basic knowledge about android studio and java so i wanted to accomplish this app by making classes and objects, but whenever i try to run my app the app crashes…

rohit901
- 110
- 11
-2
votes
1 answer
findViewById returns null on Nougat, but not Marshmallow
In Marshmallow, everything works as it should. However, in Nougat, I get a void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference error. The currentWorkoutDisplay remains null, even after TextView…

Ross Wardrup
- 311
- 1
- 9
- 26
-2
votes
2 answers
How make findViewByID global
Good evening,
I have a problem, I want to declare "finViewById" one time as global. But it only works as local one and so I have to copy and paste them, which is bad.
public class MainActivity extends AppCompatActivity {
//(I WANT…
user7026004
-2
votes
1 answer
Why RecyclerView is null?
I try to create a list of cards with info on it.
So, I have main activity, which starts card activity:
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if…

Admiral Land
- 2,304
- 7
- 43
- 81
-2
votes
2 answers
what is the implementation of function findViewById in android
I just start to learn Android.
I know Android is the open source OS.
I use android studio for develop the software.
I known the function findViewById.
I want to know the implementation of this function.
I just see below.
Could you please help to…

Android Dev
- 11
- 1
- 1
-2
votes
3 answers
error: cannot find symbol method findviewbyid
I have got an app with a tabLayout of 2 fragments with listView and I want to load the content from a URLConnection with Json but in the Fragment.java file I geht the Error: can't resolve method 'findViewByID(int)'.
public class Fragment1…

nolags
- 633
- 1
- 11
- 30
-2
votes
1 answer
cannot resolve 'findviewbyid(int)'
excuse me for repeating this question, but i saw the other answers and i just can't get it right. I'm new to android, and new to english :/
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import…

dreameral
- 121
- 1
- 9
-2
votes
1 answer
NullPointerExcpetion on findViewById
I'm trying to build a basic table view with a few rows and columns populated with textviews to represent a lesson timetable. I have written some code which works out what lesson I would have using date and time, then change the colour of its…

Harris Douglas
- 45
- 2
- 9
-2
votes
3 answers
Null pointer when I try to findViewById and call setAlpha
My Activity:
import android.support.v7.widget.Toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
…

quantumpotato
- 9,637
- 14
- 70
- 146
-2
votes
2 answers
FindViewByID - Null Pointer Exception! [ANDROID STUDIO]
I am very new with Android Studio, so there are many things I Need help for.
One of these is that annoying findViewById().
Here is the most important part of my MainActivity.java
public class MainActivity extends ActionBarActivity {
public Button…

Niemand
- 21
- 4
- 8
-2
votes
1 answer
findViewbyId returns null - but not when put into a button onClick listener
I want to access a TextView to exhange its label.
However, findViewById seems to return null when the code is in onCreate(), onResume() or onStart(). The application crashes only if the
//if(Day != null)
is not commented by //.
The code snippet…

Vince
- 3
- 3
-2
votes
3 answers
I Can't use my findViewById from AsyncClass
I Can't use findViewById() from my Kclass=( How can i use it? `
private class BackGroundTask extends AsyncTask{
@Override
protected Void doInBackground(Void... params) {
try {
//execute -…

Raqim
- 93
- 1
- 1
- 6
-2
votes
1 answer
android - findViewById using a String
I have many many ImageButtons,
and i want to use something to shortcut the code.
Like use findViewById method with a String value same findViewById("R.id.btn_name"),
or get button by tag,
or something like this.
Thanks in Advance.

Malek Alrwily
- 29
- 3
-2
votes
2 answers
getActivity.findViewById() or mView.findViewById()
I would like to know why sometime getActivity.findViewById() works and sometimes it returns null ?
And with myView.findViewById() it works ?
Thanks in advance :)

nsvir
- 8,781
- 10
- 32
- 47