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How to create custom array adapter when items defined dynamically

I have a custom adapter which is supposed to contain image buttons. However, I am bit confused on the implementation of the override for the getView() method. Since my image buttons are defined dynamically, I am able to recover an image button by using the code
#Override
public View getView(int i, View view, ViewGroup viewGroup){
ImageButton ibutton = (ImageButton) getItem(i);
How do I return its view? I have not specifically created an xml file for it since it is just an ImageButton (not in combination with anything else), but is it necessary to create an xml for it? Or is there a way to easily get the view from the imagebutton itself.
When I try this for getView(), the imagebutton is not clickable for some reason.
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageButton imageButton = getItem(position);
return imageButton ;
}

Try to build you adapter something like this:
public class ImageButtonAdapter extends BaseAdapter {
private Context mContext;
// Constructor
public ImageButtonAdapter(Context c) {
mContext = c;
}
public int getCount() {
return listCount;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageButton for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageButton imageButton ;
if (convertView == null) {
imageButton = new ImageButton (mContext);
imageButton.setLayoutParams(lp);
}
else
{
imageButton = (ImageButton ) convertView;
}
imageButton.setBackgroundColor(Color.TRANSPARENT)
return imageButton ;
}
}

Listview item click applying to other items

I have this on my main activity:
listView.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> av, View v, int position,
long id) {
TextView wrapper = (TextView) v.findViewById(R.id.title);
VideoModel o = (VideoModel) videoAdapter.getItem(position);
wrapper.setText(o.title);
}
});
This code (as you would guess) changes the textview of a list view row (which is a layout).
The problem is that for some reason when I click on the first row, the text changes, but it also changes on the third row (with the same text).
Any toughts?
If you want to see the whole code, refer to How to call method from activity to change layout?

Don't change Views in setOnItemClickListener instead change your data and notify adapter so that adapter will change your UI.
Example:
Model
class VideoModel {
public String title;
public String videoUrl;
public String imageUrl;
public boolean isTitleVisible;
}
Adapter
public class VideoAdapter extends BaseAdapter{
#Override
public View getView(final int position, View convertView, ViewGroup parent)
{
VideoLayout view;
if (convertView == null) {
view = (VideoLayout) LayoutInflater.from(context).inflate(R.layout.video, parent, false);
}else{
view = (VideoLayout) convertView;
}
VideoModel item = (VideoModel) getItem(position);
if (item != null) {
view.prepare(item);
if(item.isTitleVisible){
view.changeTitle("");
}
}
return view;
}
}
On click listener:
#Override
public void onItemClick(AdapterView<?> av, View v, int position,
long id) {
videoItems.get(position).isTitleVisible=! videoItems.get(position).isTitleVisible;
videoAdapter.notifyDatasetChange();
}
This is just an example in which you change your view model and just notify adapter to change the view in onITemClick

How to get selected spinner value from list view in android?

I have a listview with a textview and spinner which has same values for every spinner in the list.both values for textview and spinner are separately in xml files. how can i get selected spinner value for each row in the spinner..according to the relative textview..i m totally beginner to android ..

In your WhateverAdapter add these methods:
public void setOnSpinnerItemSelectedListener(OnItemSelectedListener listener){
this.mSpinnerItemSelectedListener = listener;
}
In your getView() method:
public View getView(int position, View convertView, ViewGroup parent){
//...
viewHolder.spinner.setOnItemSelectedListener(mSpinnerItemClickListener);
//.....
return convertView;
}
Then in your Activity or wherever:
MyAdapter adapter = new MyAdapter(Context....);
adapter.setOnSpinnerItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
// your code here
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
myListView.setAdapter(adapter)

OnItemClickEvent not fired in GridView in android

i m developing an application in which gridview contain list of button...
when i place images instead of button in gridview then onItemClickEvent get fired..but if i place button in gridView then click event not getting callled...i dont know what is the problem...even i m not getting exception..
here is my code...
public class MainMenu extends Activity
{
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.mainMenu);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
Toast.makeText(MainMenu.this, "hello" + position, Toast.LENGTH_SHORT).show();
}
});
}
//inner class for adapter
class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c)
{
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
//ImageView imageView;
Button btn;
if (convertView == null) { // if it's not recycled, initialize some attributes
btn=new Button(mContext);
// imageView = new ImageView(mContext);
btn.setLayoutParams(new GridView.LayoutParams(120,120));
// imageView.setLayoutParams(new GridView.LayoutParams(140,140));
//imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
btn.setPadding(10,15, 10,15);
btn.setImeActionLabel("hello",0);// actionId)
// imageView.setPadding(8,8, 8, 8);
} else
{
btn=(Button)convertView;
//imageView=(ImageView)convertView;
}
btn.setBackgroundResource(mThumbIds[position]);
//imageView.setImageResource(mThumbIds[position]);
//return imageView;
return btn;
}
// references to our images
private Integer[] mThumbIds =
{
R.drawable.pantrylocator_icon,
R.drawable.volunteeropportunity_icon,
R.drawable.volunteerlocator_icon,
R.drawable.volunteermanagement_icon,
R.drawable.donationform_icon,
R.drawable.donationviamsg_icon,
R.drawable.donationvideo_icon,
R.drawable.virtualfooddrive_icon,
R.drawable.newevent_icon,
R.drawable.pressrelease_icon,
R.drawable.volunteerphotos_icon,
R.drawable.aboutus_icon,
};
}
}

The button has its own OnClickListener:
public View getView(int position, View convertView, ViewGroup parent) {
//ImageView imageView;
Button btn;
if (convertView == null) { // if it's not recycled, initialize some attributes
btn=new Button(mContext);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
}
});
// imageView = new ImageView(mContext);
btn.setLayoutParams(new GridView.LayoutParams(120,120));
// imageView.setLayoutParams(new GridView.LayoutParams(140,140));
//imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
btn.setPadding(10,15, 10,15);
btn.setImeActionLabel("hello",0);// actionId)
// imageView.setPadding(8,8, 8, 8);
} else
{
btn=(Button)convertView;
//imageView=(ImageView)convertView;
}
btn.setBackgroundResource(mThumbIds[position]);
//imageView.setImageResource(mThumbIds[position]);
//return imageView;
return btn;
}

In your ImageAdapter-> getView method add the following line before returning newly created "convertView"
convertView.setClickable(false);
convertView.setFocusable(false);
If any of the views in gridview are clickable then they will block the grid's ItemClick listener from responding.

There is no onclick event written for the Buttons you are adding. Write code for the buttons to handle the click event! let us know then.

i have fece this problem also but finally got the solution i have follow the above suggession
and define button click event in base adapter class like as
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v;
if(convertView==null){
LayoutInflater li = LayoutInflater.from(mContext);
v = li.inflate(R.layout.icon, null);
tv = (Button)v.findViewById(R.id.icon_text);
iv = (ImageView)v.findViewById(R.id.icon_image);
iv.setImageResource(mThumbIds[position]);
tv.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Toast.makeText(mContext, "vim", Toast.LENGTH_LONG).show();
}
});
}
else
{
v = (View)convertView;
}
return v;
}

gridview = (GridView) findViewById(R.id.gameGrid);
gridview.setAdapter(ia);
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//Ur Code here
}
Add click events for the button added in gridView

Here's the cleanest way to do it: call performItemClick() on the GridView from within each button's click listener. That way you can still use the GridView's onItemClickListener like normal.
#Override
public View getView(final int position, final View convertView, final ViewGroup parent) {
...
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
((GridView) parent).performItemClick(v, position, 0);
}
});
}
http://www.migapro.com/click-events-listview-gridview/

I have solved my problem as i define button click event in base adpter class and my problem is solved......

ListAdapter to modify the datasource (which is an arraylist)

here's a problem that i've run into lately:
I have a listview with a custom adapter class, the adapter takes in a listview and populates the listview with elements from it. Now, i'd like to have a button on each row of a listview to remove the item from it. How should i approach this problem? Is there a way to remotely trigger a method in the activity class and call notifydatachanged() method on the adapter to refresh the listview?

I've done something like that:
public class MyAdapter extends Adapter {
private final ArrayList<String> items = new ArrayList<String>();
// ...
deleteRow(int position) {
items.remove(position);
notifyDataSetChanged();
}
//
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null) {
Tag tag = new Tag();
// inflate as usual, store references to widgets in the tag
tag.button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
deleteRow(position);
}
});
}
// don't forget to set the actual position for each row
Tag tag = (Tag)convertView.getTag();
// ...
tag.position = position;
// ...
}
class Tag {
int position;
TextView text1;
// ...
Button button;
}
}

In the getView() method, can't you just setOnClickListener() on the button?
Something like this:
static final class MyAdapter extends BaseAdapter {
/** override other methods here */
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
// inflate the view for row from xml file
// keep a reference to each widget on the row.
// here I only care about the button
holder = new ViewHolder();
holder.mButton = (Button)convertView.findViewById(R.id.button);
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
// redefine the action for the button corresponding to the row
holder.mButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// do something depending on position
performSomeAction(position);
// mark data as changed
MyAdapter.this.notifyDatasetChanged();
}
}
}
static final class ViewHolder {
// references to widgets
Button mButton;
}
}
If you're unsure about extending BaseAdapter, check out example List14 in ApiDemos. This techniques provides you with a flexible way to modify just about any aspect of your adapter, though it's quite some work.