I will sound stupid to most of you by asking this, but I haven't been able to figure it out on my own and can't pass to my next task until I found an answer.
So far I have downloaded the LazyList project from https://github.com/thest1/LazyList made by Fedor, I'm trying to understand how it works so I can implement it on my own project. My problem is that I don't know where to implement the onitemclicklistener part:
AdapterView.OnItemClickListener onitemClick = new AdapterView.OnItemClickListener()public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
noteId= //the item id from the list
Toast.makeText(getApplicationContext(), noteId, 2000).show();
}
I have try to add it on my mainActivity but then I can't find how to connect to my LazyAdapter to find the item id to be displayed in a toast. My project will contain some other information in the list (as a table several columns) so I want to be able to access an specific columns from that rows using the item id. and testing with a simple toast will help.
Thanks, I hope you don't laugh to much and help me a little.
I think you are going about it in the wrong manner: AdapterView.OnItemClickListener is an interface and the onItemClick() method takes four parameters... I assume this is what you are trying to do:
ListView listView = (ListView) findViewById(R.id.list);
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(), id + "", 2000).show();
}
});
Related
I am using android built in layout android.R.layout.simple_list_item 2. I wanted to perform onItemclicklistner() for the items in this layout. I couldn't find the resource id for this layout without which I couldn't find a way to perform the listner function. The examples I have seen so far is
ListView list = (ListView) findViewById(R.id.mylist); // Since I am using built in layout I couldn't figure out the resourse id as in this case.
list.setOnItemClicklistner();
So my problem is without knowing the resourse id of the built in layout "simple_list_item 2" how can I create a Listview object. and without having a ListView Object I am unable to access setOnItemClickListner(). Hope I delivered the question in a meaningful way. Thanks
Use setOnItemClickListener() instead of setOnClickListener()
If you want to perform clicks on items in the ListView, try using OnItemClickListener in place of OnClickListener. The OnItemClickListener can be set on the ListView as shown below.
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
// Perform the required tasks here
}
});
for list item click u should set onItemClickListener like below
listview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int position,
long id) {
}
});
also you can set onItemClickListener Interface to your Activity and override method in activity
use setonItemClickListner();
listview.setOnItemClickListner(new OnItemClick(){});
I'm using notifyDataSetChanged with my custom GridViewAdapter which updates the listView however when I click on something with my updated listView, the old links are still there. I have the following ClickListener in my onCreate method.
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(getBaseContext(), SpiceList.class);
intent.putExtra("INGREDIENTS_CALL", true);
intent.putExtra("INGREDIENTS_SELECTED", position + 1);
if (recipeCall) {
intent.putExtra("RECIPE_CALL", true);
}
startActivity(intent);
}
});
I've tried duplicating this inside the buttons that update the listView but this does not work. Any ideas for how I can best update my listener to reflect my changed listView?
Thanks! :)
Not sure if i understand your question but let me see if i can try. You are changing the listviews views when you click on one?
Are you deleting any element in the array or List you are using for your adapter? So you remove an item and then call notifyDataSetChange()? or you add an item to the array and call the notify method?
Turns out the problem was in the way I was retrieving my SQL queries. I was making the position of my listener equal to the ID of the SQL entry I was retrieving. Therefore, even though my list changed, item 1 was still pulling SQL items with an ID of 1.
When I designed my queries in Android, I originally did not expect that I would run into this problem. However, now I've linked my SQL queries to the actual item ID and not the listener position. My new listener is now:
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(getBaseContext(), SpiceList.class);
intent.putExtra("INGREDIENTS_CALL", true);
intent.putExtra("INGREDIENTS_SELECTED", Integer.parseInt(resultsID.get(position)));
if (recipeCall) {
intent.putExtra("RECIPE_CALL", true);
}
startActivity(intent);
}
});
Thanks for your help!
Up front: This is my first attempt at an Android app. I'm in that strange place of not knowing what to search for to find the answer to my question.
What I have accomplished is:
Created a custom class myCustomClass with properties of 'title' and 'youTubeUrl'
Created an ArrayList<myCustomClass>
Added multiple elements to ArrayList<myCustomClass>
Created a custom ArrayAdapter and attached it to the the arraylist.
Added an onItemClickListener to the custom ArrayAdapter.
All of that works good. I would like to show the title in the ListView and then when the user clicks the list view item, I'd like to get a reference to the youtubeUrl property.
Here's what I have for the adapter code:
MyListAdapter myListAdapter = new MyListAdapter(this, R.layout.my_list, elements);
myList.setAdapter(myListAdapter);
myList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String item = ((TextView)view).getText().toString();
Toast.makeText(getBaseContext(), item, Toast.LENGTH_LONG).show();
}
});
myListAdapter.notifyDataSetChanged();
Thanks for your help.
You can use the position property in onItemClick to go back to your data source and find the relevant item. From there you should be able to retrieve the Url.
As another poster implied, it depends on what you are using in your adapter. Assuming it's MyCustomClass. You can do something like this in your onItemClick method:
MyCustomClass selection = (MyCustomClass) getListView().getItemAtPosition(position);
I have a ListView in my activity.
Each row includes three TextViews in this pattern: (RowId) (Name) (Phone number)
I need to get row id when user clicks on a row. I did so many things and search the net, however i didn't find a solution. I have no idea how to get row id from following method:
listView = (ListView) findViewById(R.id.listview);
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Log.i(TAG, "item " + position + " clicked.");
}
});
Any suggestion would be appreciated.
You also could use v.findViewById(R.id.yourTextViewId)
you could also use v.getChildAt(0) if you are sure that the ListView item is formed directly by those three TextView's
to get row element
use v.findViewById(<id of row element>);
you can use get get object data in list ...........
<your_adapter>.getItem(position);
or
parent.getItemAtPosition (position);
both will return the Object....
I am new to android programming. I need some help here. I have used this site example on creating a listview. What I want to achieve is when the user clicks a particular row, the row clicked will perform its respective action. (Eg. When clicked row 1 will show a toast. When clicked row 2 will direct the user to another new view, etc.)
I have set a OnItemClickListener to the listview but am lost on how to do it. Any help will be appreciated. Thanks!
Below is my code:
.......
final ListView list = new ListView(this);
list.setOnItemClickListener(new OnItemClickListener(){
#Override
public void onItemClick(Adapter<?> arg0, View v, int i, long l){
// At implementation
}
});
.......
It looks like you're on the right track, everything should be clearer with onItemClick's parameter names :
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(), "Clicked row " + position,
Toast.LENGTH_SHORT).show();
}
So you actually get the position of the item clicked, and can have a different action for each item.
To get the index of the selected item:
int selected_item = myListView.getPositionForView(view);
or to get the string:
String chosen_item = (myListView.getItemAtPosition(selected_item).toString());
If your class is extending ListActivity replace "myListView" with "this".