Develop Reference

How to get the id resource id of a view in a List view

I have Listview which is showing different images of animals,birds,reptiles. The list view is working fine. Now I want when user click to any picture it should appear in the ImageView.The ImageView is just below the listview. so when ever user will click any image in the listview it should appear in the Imageview.
Also there is a button. Now I want to achieve that when user select any image and press Ok button that paticular image should show on the image view of other activity also. I Know I can send the Id through intent.putextra(), but the problem is first place how to get the id of particular picture.
Source code
public class MainActivity2 extends ActionBarActivity {
private TypedArray ListIcons;
private HorizontalListView listView;
private ArrayList<AnimalsListItems> SuitItems;
private AnimalsListAdapter adapter1 = null;
/** An array of strings to populate dropdown list */
String[] actions = new String[] {
"Bookmark",
"Subscribe",
"Share"
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity2);
listView = (HorizontalListView) findViewById(R.id.suits_list);
AnimalsItems = new ArrayList<AnimalsListItems>();
/** Create an array adapter to populate dropdownlist */
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_spinner_dropdown_item, actions);
/** Enabling dropdown list navigation for the action bar */
getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
getSupportActionBar().setDisplayShowTitleEnabled(false)
;
getSupportActionBar().setDefaultDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle(" "+" "+" ");
/** Defining Navigation listener */
android.support.v7.app.ActionBar.OnNavigationListener navigationListener = new android.support.v7.app.ActionBar.OnNavigationListener() {
#Override
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
Toast.makeText(getBaseContext(), "You selected : " + actions[itemPosition], Toast.LENGTH_SHORT).show();
ListIcons = getResources()
.obtainTypedArray(R.array.ic_launcher);// load icons from
// strings.xml
for (int i = 0; i<=ListIcons.length(); i++) {
AnimalsItems.add(new AnimalsListItems(ListIcons.getResourceId(i,-1)));
}
adapter1 = new SuitsListAdapter(getApplicationContext(),SuitItems);
Log.v(adapter1.getCount()+"");
listView.setAdapter(adapter1);
return false;
}
};
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//With the position parameter, you can fetch the item at the clicked position like below. Cast it to whatever type your ListView is.
Object yourItem = (Object) listView.getItemAtPosition(position);
//Now you can assign the image to an imageview
}
});
/** Setting dropdown items and item navigation listener for the actionbar */
getSupportActionBar().setListNavigationCallbacks(adapter, navigationListener);
this.overridePendingTransition(R.anim.anim_slide_in_left,
R.anim.anim_slide_out_left);
}
}

For your ListView, you can set an onItemClickListener as below
ListView listView1 = (ListView) findViewById(R.id.listView1);
listView1.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//With the position parameter, you can fetch the item at the clicked position like below.
AnimalsListItems yourItem = (AnimalsListItems) listView1.getItemAtPosition(position);
//Now you can assign the image to an imageview
}
}

Not sure what you mean by "id", if you're talking about drawable id's, path to image files, or just any way to identify your image. It depends a lot on how you populate your list. You didn't supply any code at all.
But since you have a ListView I suppose you have an Adapter, and that you're backing that adapter with some data, such as an array, database etc. When you click on an item, you get an onItemClick callback with the index of the item you clicked on. You should be able to use this index to find which image you clicked on from your data source.
Then when it comes to passing that to another activity, well, again it depends on how you represent your images but you should be able to pass whatever data you need to represent the image in an intent extra to the second activity.

You can use the setOnItemClickListener method of ListView to get witch item clicked.Because one item one image, you can get the target image.

1.Step
Rather getting resource id you can create one integer array containing resource id's like,
int resourceID[] = [R.drawable.image1, R.drawable.image2, ...]
Assign this array to your ListView image item
2.Step
Now can easily get the postion of selected list item or image using Lists on item click method
listView.setOnItemClickListener(new OnItemClickListener() {} )
3.Step
Just pass your ResourceID array & tapped position to next/target activity & use it, rather passing resourceID
or
Otherwise make your ResourceID as static, pass only tapped position to next Activity & use this static ResourceID from previous Activity
i.e -> yourImageView.setImageResource(FirstActivity.ResourceID[position])

OnItemClick not working properly in listview

Using the following code, when an item from the list is selected it updates a data table. The problem is when there are several items listed, regardless of which one is selected, it always updates the first listed item showing rather than the one selected. Thanks in advance!
Edited-Updated. Incorporated (position) and tried to simplify a bit of the code. Still will not capture the selected item, always returns the top item showing on the listview, regardless. The DB controller is working fine, all else is good except this...
setContentView(R.layout.list_messages);
ArrayList<HashMap<String, String>> phraseList = controller
.getUnreadMessage();
ListView lv = getListView();
ListAdapter adapter = new SimpleAdapter(
ReadUnReadMessages.this,
phraseList,
R.layout.view_list_messages,
new String[] { "mFromName", "mToAddress", "mBody",
"mToName", "messageTime", "mFromAddress", "mRead",
"messageId" },
new int[] { R.id.messageFrom, R.id.messageToAdd,
R.id.messageBody, R.id.messageTo, R.id.messageTime,
R.id.messageFromAdd, R.id.readCode, R.id.messageId });
setListAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long arg) {
#SuppressWarnings("unchecked")
HashMap<String, String> queryValues = (HashMap<String, String>)parent.getItemAtPosition(position);
messageBody = (TextView) findViewById(R.id.messageBody);
readCode = (TextView) findViewById(R.id.readCode);
messageId = (TextView) findViewById(R.id.messageId);
String readCode = "1";
queryValues
.put("messageId", messageId.getText().toString());
queryValues.put("mRead", readCode);
queryValues.put("mBody", messageBody.getText().toString());
controller.markMessage(queryValues);
this.callSplash(view);
}
public void callSplash(View view) {
Intent objSplash = new Intent(getApplicationContext(),
Splash.class);
startActivity(objSplash);
}
});

It's hard to tell exactly how you were expecting it to work, but it seems like your central problem is that you are ignoring the 'position' parameter to onItemClick. This is Android's way of telling you which item was clicked. Somehow you need to pass that parameter, or else the corresponding item object that you fetch first from the adapter, on to the functions you call from onItemClick:
this.insertData(position);
Otherwise those functions would have to guess which item was clicked. And apparently that is what they are doing: they are assuming the first item was clicked.

Android:Checked Listview Item Goes at Last

My ListView looks like this:
[CheckBox] [TextView]
My question is, how can I change the item position when CheckBox is checked? I mean to say, if the user checked any item from ListView, then the checked item goes to the end, so its position changes from current to last.
Thanks in Advance.

Use Custom adapter for listView. here is an example. Now from your ListActivity class
final ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
HashMap<String, Object> map = (HashMap<String, Object>)
lv.getItemAtPosition(position);
// get the item Position from here and make the nacessary changes
// and update the listview again.
}

Without posting any code, this will have to be a brief overview of the pseudo steps you need to take
You simply need to update the ordering of your data set being used by your adapter (usually an arraylist or array of objects), and then called
notifyDataSetChanged()
on your adapter.
So in your case, you want to take the element at the position that was clicked, and put it at the end of your arrayList of objects.
If you post some code, you may get more detailed answers however

Here is the step you can follow. I have not tested it but you can try this.
// your value array you are binding with listview
private final String[] values;
// put default value to "n". size will be the same as for values array.
private final String[] valuesChecked;
onClick of Checkbox Listview
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//get checkbox is checked or not
if it is checked then{
valuesChecked[position]="y";
}else{
valuesChecked[position]="n";
}
// short your values array by first "n" and after "y".
// call your adapter.notifyDataSetChanged();
}
Good Luck :)

Filtering list view and getting correct onclick item

I have a list view and I've implemente filtering.
Lets say I have items A, B and C. If I type B in the filter box, only item B will be displayed and it is the position 0 of the list (before it was in position 1). So when I call the onClick item, I get the the id/position 0, which leads to displaying details about A instead of B.
This is the onclick code:
ListView lv = getListView();
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Poi poi = pois.get((int)id);
goPOIDETAIL(poi);
}
});
id and position have the same value.
is there a way to get the original position, or get some other value indicating the real item that I clicked?
Thanks

flashsearchList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Integer temp=flashSearchNameMap.get(adapter.getItem(position));
navigateSearch(temp);
}
});
(adapter.getItem(position) will return you the exact list name and in flashSearchNameMap i have stored names and position at beginning from oncreate before applying filtering.So you can get exact position by this

I think the problem is in the way you manage your filter. You should get the object with selected id not from the original List (or array) but from the filtered one.
I used something like it in this post from my blog. Hope this help you

ID and Index are not the same. Of course, you can return item index in getItemId() method of your adapter, but don't expect your items to be identified correctly by this method if you do.
Try providing unique ID for each of your items. The idea is somewhat similar to ID of each record in the database, which never changes (and lets you reliably identify each record), and it is easily implemented when you get your data from database.
But if your items don't have unique IDs, and you don't want to bother providing them, there's another approach (see this example code for Adapter below):
public MyAdapter extends BaseAdapter {
private List<Item> items;
private List<Item> displayedItems;
public MyAdapter(List<Item> items) {
this.items=items;
this.displayedItems=items;
}
public filter(String query) {
if(query.isEmpty()) {
displayedItems=items;
} else {
displayedItems=new ArrayList<Item>();
for (Item item : items) {
displayedItems.add(...) //add items matching your query
}
}
notifyDataSetChanged();
}
//...
//NOTE: we use displayedItems in getSize(), getView() and other callbacks
}

You can try:
#Override
public boolean hasStableIds() {
return false;
}
in your adapter

if you are using datbase you have the _id key that you can load in a filtered list as invisible field. Once you click on the item you can query data with _id key.
If you aren't using a database you could add a hidden id element in your row element as well.

Get reference to an object within a ListView

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);