When I retrieve data from database, I have for each row unique ID I want match id with string in listview but ID I want it to be invisible, so that when i click any item in listview trans me to another activity have data about this item.
That means I have Two table in database match together I want to retrieve one as listview , when click item trans me to data match the item i have been clicked.one as listview , when click item trans me to data match the item i have been clicked.
How can I do this?
this should work
myAdapter.setViewBinder(new MyViewBinder());
public class MyViewBinder implements ViewBinder {
#Override
public boolean setViewValue(View view, Object data, String text){
//Since it iterates through all the views of the item, change accordingly
if(view instanceof TextView){
((TextView)view).setTag("whatever you want");
}
}
}
You can use custom adapter and use like this method to achive yor goal
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
if(vi == null){
vi = inflater.inflate(R.layout.row_layout, null);
}
final int id = idGetFuncttion(position);
vi.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
doSomethingWithID(id);
}
});
return vi;
}
1.set your unique id to each row by setTag property and retrieve it by getTag property
2.use custom adapter and custom listview layout for the listview and set your unique id to invisible textview in custom listview layout through custom adapter
Related
Hello guys I want to check through my GridView and see if any of the checkBox is checked or not. Eventually, I want to delete the rows in my database and update my custom adapter but I'm lost on what function to use or how to approach it. I know to use some kind of while/for loop but which data type can surf and iterate each list items? I was looking around and .getChildAt(index) seems like something that would be useful but it doesn't work/appear for my custom adapter variable in my MainActivity.
Here is my Custom Adapter class for reference
//variable responsible for making checkbox visible or not
private boolean displayCheckBox;
//constructor - it takes the context and the list of words
WordAdapter(Context context, ArrayList<WordFolder> word){
super(context, 0, word);
}
//sets the visibility of the checkBox
public void setCheckBoxVisibility(boolean visible){
this.displayCheckBox = visible;
}
#Override
public View getView(int position, View convertView, ViewGroup parent){
View listItemView = convertView;
if(listItemView == null){
listItemView = LayoutInflater.from(getContext()).inflate(R.layout.folder_view, parent, false);
}
//getting the checkBox view id
CheckBox checkBox = (CheckBox) listItemView.findViewById(R.id.check_box);
checkBox.setVisibility(displayCheckBox ? View.VISIBLE : View.GONE);
//Getting the current word
WordFolder currentWord = getItem(position);
//making the 3 text view to match our word_folder.xml
TextView date_created = (TextView) listItemView.findViewById(R.id.date_created);
TextView title = (TextView) listItemView.findViewById(R.id.title);
TextView desc = (TextView) listItemView.findViewById(R.id.desc);
//using the setText to get the text and set it in the textView
date_created.setText(currentWord.getDateCreated());
title.setText(currentWord.getTitle());
desc.setText(currentWord.getTitleDesc());
return listItemView;
}
}
I have a arraylist of buttons (reserveButtons) that I can display in a listview. I have made a search function which searches in my database and outputs a list of integers (resultID). They correspond to the indexes of reserveButtons I want to display.
Simply put, I want to do something like this when the search button is clicked:
ArrayAdapter<ReserveButton> adapter = new MyListAdapter();
ListView list = (ListView) myView.findViewById(R.id.resultslist);
list.setAdapter(adapter);
for (int result : resultID) {
adapter.add(reserveButtons.get(result));
}
So, for each result, I want to add the corresponding button to the listview.
Here is the private class MylistAadapter :
private class MyListAdapter extends ArrayAdapter<ReserveButton> {
public MyListAdapter() {
super(getActivity(), R.layout.list_item, reserveButtons);
}
#NonNull
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View itemView = convertView;
if(itemView == null) {
itemView = gettActivity().getLayoutInflater().inflate(R.layout.list_item, parent, false);
}
ReserveButton currentButton = reserveButtons.get(position);
//the resultItem is the id of the buttons
Button butt = (Button) itemView.findViewById(R.id.resultItem);
butt.setBackground(currentButton.getImage());
return itemView;
}
}
I know that getView will just display every reserveButton, but I want the code in getView to be executed when I add each button, but the position doesn't change since position = result in the for loop of the first code block.
//This code is inside MyListAdapter
#Override
public void add(ReserveButton object) {
/* What do I write here to inflate a list_item and give it
the background image reserveButton.get(result).getImage() */
super.add(object);
}
How do I override the add method of MyListAdapter so that I can add a reserveButton and change its background image for each result in the resultID list.
If the same thing can be accomplished without the add method, please do tell.
P.S: I do not want to just list every reserveButton and then filter them with the search; I want to display ONLY the buttons that the user is looking for.
I figured it out myself!
Basically, what I did was create a separate ArrayList of ReserveButtons and do the foreach loop like so:
int index = 0;
for (int result : resultID) {
//result is the single ID of an answer
answerButtons.add(index,reserveButtons.get(result));
index ++;
}
populateListView();
So I end up storing ONLY the buttons I want to display in the answerButtons list. And here is what happens in populateListView()
private void populateListView() {
ArrayAdapter<ReserveButton> adapter = new MyListAdapter();
ListView list = (ListView) myView.findViewById(R.id.resultslist);
list.setAdapter(adapter);
}
and the getView() method:
public View getView(int position, View convertView, ViewGroup parent) {
View itemView = convertView;
if(itemView == null) {
itemView = getActivity().getLayoutInflater().inflate(R.layout.list_item, parent, false);
}
//Just set the image of the corresponding answerButton
ReserveButton currentButton = answerButtons.get(position);
Button butt = (Button) itemView.findViewById(R.id.resultItem);
butt.setBackground(currentButton.getImage());
return itemView;
}
Problem solved. I haven't seen any answers to a problem like this, so this post should make it easily google-able for any newcomer who stumbles upon this problem.
i have a listView that each row of that shows a text. each row fetched from database that has 2 fields:
1- id
2-text
now, in my list i have to show only my text not id. but i need when i click on a list row fetch each rows id that related to his text. in fact i fetch text,id pair from db and show the text and use id in on click event. but how i can do that? how i related id to each row?
Set id as a tag to each view inside the listView and in onClick retrieve it
In your Adapter, set the tag of the TextView.
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View listView = null;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if( convertView == null){
listView = inflater.inflate(R.layout.list_item, null);
}
else{
listView = convertView;
}
TextView tv = (TextView) listView.findview(R.id.textview);
tv.setText("my-text");
tv.setTag("my-id");
return listView;
}
Retrieve the id :
// Main Activity
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
TextView tv = (TextView)v.findViewById(R.id.textview);
String id = tv.getTag().toString();
}
I have this code inside my BaseAdapter Adapter:
public View getView(final int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.facebook_friends_layout, null);
TextView friendsName = (TextView)vi.findViewById(R.id.tvFacebookName); // Friends thumb
friend_image=(ImageView)vi.findViewById(R.id.ivFacebookPicture); // thumb image
song= new HashMap<String, String>();
song = data.get(position);
friendsName.setText(song.get(MyFriends.KEY_FBNAME));
//Log.i("Facebook Pangalan", ""+MyFriends.KEY_FBNAME);
FriendName = (String) friendsName.getText().toString();
FBID = song.get(MyFriends.KEY_FBID);
String fbAvatarUrl = "http://graph.facebook.com/"+ FBID +"/picture";
//Log.i("FBID", FBID);
BitmapManager.INSTANCE.loadBitmap(fbAvatarUrl, friend_image, 100,100);
Button btn=(Button)vi.findViewById(R.id.btnAdd);
if (FBID.equals(""))
{
btn.setVisibility(View.GONE);
}
else
{
btn.setVisibility(View.VISIBLE);
}
btn.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
LOCK_BASEDATA = MyFriends.LOCK_BASEDATA;
if (LOCK_BASEDATA.equals("0"))
{
//FACEBOOK FRIENDS
Log.i("", ""+FriendName);
//AddfromFacebookFriends();
}
else if (LOCK_BASEDATA.equals("1"))
{
//MY REQUEST
//((MyFriends)context).SetMyRequest();
//Log.i("LangYa", "Langya");
}
else if (LOCK_BASEDATA.equals("2"))
{
//FRIEND REQUEST
//((MyFriends)context).SetFriendRequest();
//d2papasok
AddFriendRequest();
}
}
});
return vi;
}
I am logging my friend's name whenever I click on the button. Now my problem starts when I click the button; I am not getting my desired string. It is getting the string from another row of my listview.
EDIT
Thanks, actually ive just aaded this code
public void onClick(View arg0) {
LOCK_BASEDATA = MyFriends.LOCK_BASEDATA;
if (LOCK_BASEDATA.equals("0"))
{
//Object x =btn.getTag();
//String sa = x.toString();
View parentView = (View) arg0.getParent();
String textviewtext = ((TextView) parentView.findViewById(R.id.hiddentv)).getText().toString();
//FACEBOOK FRIENDS
AddfromFacebookFriends(textviewtext);
}
else if (LOCK_BASEDATA.equals("1"))
{
I am just getting my parents View to get my desired textview and now it works. Thanks anyway
You are trying to get the FriendName using this code:
TextView friendsName = (TextView)vi.findViewById(R.id.tvFacebookName);
FriendName = (String) friendsName.getText().toString();
This is not The FriendName of the ListView item you clicked. Its the FriendName of the newly created ListView item. Because in getView(), the ListView item you get is the newly created one.
One way to solve this is:
Use tags like KunalK suggested. I am not sure if it works...i never tried it.
Or the other way is:
onButtonClicked get the Position of the ListView item you clicked, and get the respective Name from the ArrayList you are using.
Here the Position is not the position parameter in the getView(). That gives the position of the newly created ListView item again.
Use this to get the actual position of the clicked item:
int clickedItemPosition = yourListView.getPositionForView((View) yourButton.getParent());
you should go with this by setting the "FriendName" in your button's setTag property. and whenever you handle your button click event fetch your FriendName String by using getTag property of button. for e.g. something like this:
....
btn.setTag(FriendName);
btn.setOnClickListener(new OnClickListener(){
public void onClick(View arg0) {
LOCK_BASEDATA = MyFriends.LOCK_BASEDATA;
if (LOCK_BASEDATA.equals("0"))
{
//FACEBOOK FRIENDS
Log.i("", ""+btn.getTag().toString());
//AddfromFacebookFriends();
}
else if (LOCK_BASEDATA.equals("1"))
{
//MY REQUEST
//((MyFriends)context).SetMyRequest();
//Log.i("LangYa", "Langya");
}
else if (LOCK_BASEDATA.equals("2"))
{
//FRIEND REQUEST
//((MyFriends)context).SetFriendRequest();
//d2papasok
AddFriendRequest();
}
}
});
....
Getting the name from the list can be accompished by using an onListItemClick method as follows (not in your adapter, but in the class with your list):
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
TextView friendsName = (TextView)v.findViewById(R.id.tvFacebookName);
FriendName = (String) friendsName.getText().toString();
}
Since this code is the onListItemClick method, the View v parameter is the view of the row you clicked. Once you have that, you search that particular row view for the TextView you want and then pull the string from that.
You had the right idea, you just put it in the wrong place.
I am new to Android, so this may seem like a basic question. But what I got is a very simple class called SingleItem, which has an integer and a String and a getter and setter for each. In my application, I got an ArrayList which holds a collection of SingleItem objects. I also have a layout with a ListView widget.
What I am trying to do is populate the ListView with my String value in SingleItem, but when a user selects an item from the ListView, I need the integer ID from that SingleItem value. How do I do this in Android development?
If you are using your own adapter to populate the list then in the getView() function when building the view to return you can call setTag() on the view you are returning and store the entire "SingleItem" object. Then in the onClickListener of the views you return you can retrieve your info using the getTag() method of the view that has been clicked.
EDIT:
Specified which onClickListener I am referring to
here is a bunch of pseudo code: create your own adapter. This will give the flexibility to do all kinds of things but important to you here is displaying only the relevant fields from your custom class and make more complicated listviews. a decent tutorial is here: http://developerlife.com/tutorials/?p=327
You will have to handle the other overrides of baseadapter but the key is assigning the value of singleItem.getString()
public class SingleItemAdapter extends BaseAdapter{
private ArrayList<SingleItem> m_items= new ArrayList<SingleItem>();
private Context mContext;
public SingleItemAdapter (Context c,ArrayList<SingleItem> items) {
mContext = c;
m_items= items;
}
.
.
.
#Override
public Object getItem(int arg0) {
return m_items.get(arg0);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.singleitemview, null);
}
SingleItem i=(SingleItem) getITem(position)
if(v!=null){
TextView tv=(TextView) v.findViewById(R.id.yourListItemView);
tv.setText(i.getStringValue());
}
}
}
After defining your custom adapter, you can then assign it to the listview and assign a listener to the OnItemSelectedListener. since this returns the position, you can tie that back to the position in your ArrayList of SingleItems.
.
.
.
SingleItemAdapter sia=new SingleItemAdapter(this,yourArray);
yourArrayList.setAdapter(sia);
yourArrayList.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View v, int position, long row) {
SingleItem si= yourArray.getItem(position);
//do something with si.getValue();
}
.
.
.
});