Let me explain myself:
As you know, when you've a view which have to be inflated several times, but changing values, you use a GridView or a ListView. Those two Composite views, have some methods like onItemClick. This method is so useful, as it returns the position of the view clicked.
With this position you can perform some concrete tasks, like retreiving from an ArrayList, the information of that object. Here's an example:
ArrayList<DocumentInfo> documents;
And when you set a setOnItemClickListener() you can get the correct values:
gallery.setOnItemClickListener(new OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> arg0, View v, int pos, long arg3) {
getDocumentInfoOf(pos);
}
});
public void getDocumentInfoOf(int position){
DocumentInfo doc = documents.get(position);
}
However, when you aren't using a GridView or a ListView, you're in your own. You don't have a clear way (AFAIK) to know which layout inflated is the one clicked (I mean like the previous example, the "position" value).
What I am currently doing, is the following:
for (int i=0; i<10;i++){
RelativeLayout documentInflated = (RelativeLayout) this.mInflater.inflate(R.layout.open_document_per_inflar, null);
documentInflated.setContentDescription(""+i);
documentInflated.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
openDocument(v);
}
});
container.addView(documentInflated);
}
public void openDocument(View v){
int idDocument = Integer.parseInt(v.getContentDescription());
//idDocument is the view clicked
}
Do you guys think this is a clear way of doing this?
Thank you!!!
If I'm not mistaken you want to get some data from your created Relative Layout when you click on it. The best solution here is to use the method setTag(Object tag). After that you get the informatiom with the method getTag(). This method allows you to add extra information to your view. As it says in the documentation:
Tags
Unlike IDs, tags are not used to identify views. Tags are essentially an extra piece of information that can be associated with a view. They are most often used as a convenience to store data related to views in the views themselves rather than by putting them in a separate structure.
Also depending on your needs you can seperate every tag with a key -> value pair with the method setTag(int key, Object tag), after that you can retrieve this object with getTag(int key);
So in your case you will have
documentInflated.setTag(i)
in the onClick yo will then have:
int i = (int)v.getTag();
Unless I'm not understanding your desire...
#Override
public void onClick(View v) {
openDocument(v);
}
v IS the view being clicked. Your code looks like it should do what you're hoping it will do. What are you actually seeing happen?
Related
I have an activity which lists objects from an array objects through a custom adapter. The row of this adapter contains several EditText's and a layout which is clickable and does the deleting of that object selected. My intention is the object can be updated by clicking on the item (which shows another activity) and deleting by clicking on the layout. So that, I have to implement the updating and the deleting by differents setOnItemClickListener's.
I have done the updating just setting an setOnItemClickListener to the listView of objects and sending the whole object to a new activity through putExtra and getIntent.
The problem is with the deleting. I have implemented an OnClickListener directly on the adapter, like this:
holder.layoutEliminar.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//Here call to an Async Task to delete the object but, what about t the id object???
}
That code goes fine when I click on the layout of the row but I don't know the way to obtain the id of the object selected in the listView. Does anybody know how??
Do not hesitate to ask me for more code or details.
Please excuse my English, not native.
You can set a tag for the view on your getView:
holder.layoutEliminar.setTag(theIdOfYourObject);
Note that View.setTag(Object tag) takes an Object as parameter (documentation). I will assume that you want to set the id of the object to delete as String for the tag.
And then, on your onClick
holder.layoutEliminar.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
LinearLayout layoutEliminar;
// Retrieve your layoutEliminar from v
// ...
// Get the id of the object to delete from the tag
String id = (String) layoutEliminar.getTag();
}
};
I already did with the help of #Antonio. I didn't use Tag's, I have used the instruction getItem(position).getId() into the method onClick to refer the id of the object (don't know if it's the best and more efficient way to do). Like this:
holder.btnEliminar.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Log.i("PedidosAdapter dd: ",String.valueOf(getItem(position).getId()));
//Async Task for deleting the object with that ID
}
});
How to use Multiple spinners in a single layout i.e., setting set On Item Selected Listener in on create
Welcome to SO. You definitely should read the FAQ to learn what kind of questions to ask and how. If you want good answers and don't want your privileges to be revoked you need to be more specific about your questions and add relevant code and error messages showing that you have tried. But since you are new I'm going to give you this one. The easiest way to do this is attach the listener to each one in onCreate() after getting a reference to each spinner through your xml
spinner1.setOnItemSelectedListener(this);
spinner2.setOnItemSelectedListener(this;
then put the methods outside of onCreate()
#Override
public void onItemSelected(AdapterView<?> parent, View view, int arg2,
long arg3)
{
// do whatever you need here depending on what is selected
// you can use a case statement and switch on the id to get the spinner (parent) or view
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
and add Implements OnItemSelectedListener in your Activity signature. Good luck and please ask more specific questions in the future and add code showing that you have made an attempt.
I have a custom ListView with two TextViews both containing different values. What I want to be able to do it get the contents from one of these TextViews when an item is clicked.
This is the code I have so far:
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String value;
// value = (get value of TextView here)
}
});
I want to be able to assign value to the text of one of the TextView's.
Although #Sam's suggestions will work fine in most scenarios, I actually prefer using the supplied AdapterView in onItemClick(...) for this:
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Person person = (Person) parent.getItemAtPosition(position);
// ...
}
I consider this to be a slightly more fool-proof approach, as the AdapterView will take into account any header views that may potentially be added using ListView.addHeaderView(...).
For example, if your ListView contains one header, tapping on the first item supplied by the adapter will result in the position variable having a value of 1 (rather than 0, which is the default case for no headers), since the header occupies position 0. Hence, it's very easy to mistakenly retrieve the wrong data for a position and introduce an ArrayIndexOutOfBoundsException for the last list item. By retrieving the item from the AdapterView, the position is automatically correctly offset. You can of course manually correct it too, but why not use the tools provided? :)
Just FYI and FWIW.
You have a few options. I reference the code from your previous question.
You can access this data from the row's layout view:
ViewHolder holder = (ViewHolder) view.getTag();
// Now use holder.name.getText().toString() and holder.description as you please
You can access the Adapter with position:
Person person = mAdapter.getItem(position);
// Now use person.name and person.description as you please
(By the way in your Person class, name and description are public so you don't need the get methods.)
Override following method in adaterclass.
public String[] getText() {
return text;
}
I have a list view that uses different layout sheets for different rows. Each sheet has different variables on them. So, when I want to implement the click listener for my list I need to know which type of row I am clicking on so that I can try to access to the correct values. For example:
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//do this for layout A
//......
// do that for layout B
//......
}
});
How can I access to the layout information and the corresponding values ?
Make sure that you have a variable in your activity where you've kept the data with which you've populated the adapter.
Then, based on the position variable, you'll be able to get the exact row which was clicked. Then based on the row, you'll be able to figure out what type of row it is, right? :)
you can use the method:
public abstract int getItemViewType (int position) of your custom adapter.
So, is there any easy way to identify the tablerow clicked?
I have a tablelayout with static data, like a menu. When the user click any tablerow I want to start the specified activity.
I've googled a couple of hours but everyone seem to use the view inside the tablerows text property to identify it, which sucks if you translate the app. I tried to find some getIndex property of the TableLayouit but no luck, and the views .getId property is useless.
I guess the solution is to have specific onclicklisteners on each tablerow but that will generate a lot of (unnecessary) code and there must be a better solution?
Regards
if you make your activity as an extension of ListView() and you put your options in a list you can actually override the method
public void onListItemClick(ListView parent, View v, int position, long id) {
}
and the position attribute of that method is an int which indicates what row you actually click
this is a solution that i am sure actually works, so if your table layout is not too complicated i suggest you to make a list and override this method!
ok, I'll try another one since that one causes you other problems, you could make something like this:
in the onCreate():
firstTextVIew = (TextView) findViewById(R.id.firstText);
firstTextView.setOnClickListener(this);
secondTextVIew = (TextView) findViewById(R.id.secondText);
secondTextView.setOnClickListener(this);
after the onCreate():
public void onClick(View v) {
/*make a list of cases for any text view, where __TextView is the name you gave to the textview when you made the getViewById() on the start of the activity*/
if(v == firstTextView){
//start activity
}
if(v == secondTextView){
//start activity
}
}