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Android ListView Adapter returns NullPointerException


Android ListView Adapter returns NullPointerException

By : bryanslegend
Date : November 22 2020, 02:42 PM
I wish did fix the issue. The app crashes when trying to populate images in to a holder's ImageView or when I try to set an onclick listener to the holder imageview. It actually crashes if I try to do anything related to the holder's imageview. , you should modify your code as below :
code :
if (vi == null) {
    vi = inflater.inflate(R.layout.feed_single_picture, parent, false);
    holder = new Holder();
    holder.media = (ImageView) vi.findViewById(R.id.postphoto);
}


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Android: NullPointerException Custom ListView Adapter

Android: NullPointerException Custom ListView Adapter


By : azam embong
Date : March 29 2020, 07:55 AM
help you fix your problem You shouldn't be using the activity view within getView but instead the adapter's provided view.
code :
public View getView(int position, View convertView, ViewGroup parent) {

// stuff

ImageButton thumbnail = (ImageButton) itemView.findViewById(R.id.favoriteThumbnail);
Android. NullPointerException when I add adapter to ListView?

Android. NullPointerException when I add adapter to ListView?


By : hnldcey
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You're never initializing firstMessages, therefore it is null. Try changing the following part
code :
public List firstMessages;
public List firstMessages = new ArrayList();
Android - NullPointerException on ListView adapter when using SimpleDateFormat

Android - NullPointerException on ListView adapter when using SimpleDateFormat


By : Jack M
Date : March 29 2020, 07:55 AM
help you fix your problem I'm having trouble when displaying a custom ListView on a tab (fragment). If I just set the adapter (which is a separate class that extends BaseAdapter) and the fields downloaded from the server, it works just fine. If I set the application to use my custom DateFormat class and format the date taken from the server in dd/MM/aaaa, I get a NullPointerException related to "childMeasure" (full logcat of the error below). , change
code :
private DateFormat df;
private DateFormat df = new SimpleDateFormat("MM-dd kk:mm:ss");
Android NullPointerException in ListView Array Adapter

Android NullPointerException in ListView Array Adapter


By : RingCentralSE
Date : March 29 2020, 07:55 AM
like below fixes the issue My app is crashing when i run it with a NullPointerException. When i run the app in debug mode i add watchers on all variables in the reported line of code and they all have values in debug mode. i can step over the troubled line in the debugger and it does not crash, but then the app crashes when i return the view (which is also not null according to the debugger) but get no error it just crashes. ,
In your Inflater you need to give your Layout.
code :
convertView = inflater.inflate(mLayoutId, parent, false);
convertView.setTag(viewHolder);
Android: NullPointerException when adding an Adapter to a ListView

Android: NullPointerException when adding an Adapter to a ListView


By : Fred
Date : March 29 2020, 07:55 AM
With these it helps
I have tried setContentView(R.layout.list), but it throws the same error...
code :
View rootView = inflater.inflate(R.layout.list,container,false);
TextView title = (TextView) rootView.findViewById(R.id.title);
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