I have a listview that is populated by a by objects from an "Offer" class I've written. Obviously, the toString() method is called and that's the text that's displayed in each list item. My question is, how do I implement an onItemClickListener that will call one of my getter or setter methods on the particular object whose toString method had been used to populate that item?
For example, I'd like to raise a toast or something when an item is clicked that retrieves a string my getClaimCode() method and displays in the toast (or whatever other dialog or even a new activity).
can I just call the methods by doing something like item.getClaimCode()...?
You don't have to implement AdapterView.OnItemClickListener, but I do, and in onCreate() I call myListView.setOnItemClickListener(this).
Then for the AdapterView.OnItemClickListener interface, I have the method:
#Override
public void onItemClick(AdapterView<?> arg0, View v, int arg2, long arg3) {
//Code
}
For you, you might do something like:
#Override
public void onItemClick(AdapterView<?> arg0, View v, int arg2, long arg3) {
//Arg2 is the position in the list so...
OfferObject offer = (OfferObject) arg0.getItemAtPosition(arg2);
//Go to town...
}
Of course your Activity doesn't have to implement the AdapterView.OnItemClickListener and you could create the listener on the fly.
yourList.setOnItemClickListener(new AdapterView.OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
OfferObject offer = (OfferObject) arg0.getItemAtPosition(arg2);
//Same idea here...
}
});
Related
I'm using a spinner in order to select a certain value, and in the activity that contains the spinnr, I've implemented OnItemSelectedListener.
in the OnCreate() method, I've defined:
spinner1.setOnItemSelectedListener(this);
but it doesn't get to the method onItemSelected(), my guess is that I'm not sending the right variable ("this").
what should I send to setOnItemSelectedListener in order for this to get to the method?
Thank You!
activity that contains the spinnr, I've implemented
OnItemSelectedListener
If OnItemSelectedListener listener is implemented in Activity then override onItemSelected in Activity :
#Override
public void onItemSelected(AdapterView<?> parent,
View selectedItemView, int position, long id) {
// your code here
}
Try this.
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
//Do something
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
Also you can look at this. http://developer.android.com/guide/topics/ui/controls/spinner.html
I have a Grid View that have 4 images .So i want to identify which image has been clicked so that corresponding to that i can start a new activity .
So please help me how can i get this
I have tried this
dataView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
}
});
getView can be used for this purpose.for this in getView find View and apply onClicklistner their.to make all views clickable you need to setFocusable(false) on all focusable views.
I have got the solution
dataView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View v, int arg2,
long arg3) {
// TODO Auto-generated method stub
Toast.makeText(
getApplicationContext(),
links[arg2], Toast.LENGTH_SHORT).show();
}
});
int arg2 in the OnItemClick method specifies the position.Using that you can get the item clicked.
I was developing a sample app in Android and came across below code, I am just wondering what part of Java,OOPS concept is used when this line is used , can any one please explain in detail this kind of declaration ? why its being declaraed like this
mainlistview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
} });
This is called an Anonymous class, in this example used as part of an Observer Pattern.
OnItemClickListener is an interface.
The ListView will save the interface implementation you gave (your new OnItemClick...).
And when the ListView detects a user click on item it will call the callback you gave (your implementation) via mOnItemClickCallback.onItemClick(params...)
In addition to what "metter" has stated,
this
mainlistview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
} });
can also be written as
mainlistview.setOnItemClickListener(this);
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
/// do the stuff for item click
}
Have a look at observer and command pattern. These pattern help you to understand the concept.
I know how can implement listview without using listactivity.But i dont know how get the clicked item from the listview.Please anyone tell me how listen the clicked item from the listview without using listactivity.
Please Follow this Link. Here you can find simple Listview example using Activity.
Using listview.setOnItemClickListener you can get Click on Listview.
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View view, int position,
long id)
{
}
You can implements OnItemClickListener and can write the method like below or just simply use eclipse to implement unimplemented method
public void onItemClick(AdapterView<?> arg0, View view, int position,
long id) {
}
First you have to make instance of list view Clickable like
lv.setClickable(true);
then
use following
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View view, int position,
long id)
{
}
use ListView.
Then with the listview object invoke
lv.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
//do your stuff
}
}
for click on listview in activiyt try this code...
ListView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
//write you action here
}
});
what I'm trying to do is make a selection from a spinner in android and then whatever is selected to be added to an edittext box. The code I have so far is this...
spinner.setOnItemSelectedListener(
new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
edittext.setText("");
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
//add some code here
}
);
Problem is this seems to be run even before the spinner is selected so it always sets my edittext to "". Ideally I would like to have it set the text to the selection made in the spinner. So, anyone have any ideas?
At startup, your spinner will get its defaultvalue, that counts as a selection.
Do a boolean FirstTime or something like that.
You probably initialize your spinner from some array or something?
The function actually looks like this
public void onItemSelected(AdapterView<?> parent,
View view, int position, long id);
So just use the position variable
{
edittext.setText(myArray[position]);
}
You can use the getItem method in the adapter to get the object that is shown. Like this:
onItemSelected(AdapterView<?> parent, View view, int position, long id) {
editText.setText((String) adapter.getItem(position));
}