Develop Reference

Howto Add Integers to a Listview With Custom Adapter

i have one list view with two text views inside it, one edit text that is in the same activity but not in the list view and two buttons one to add to the list view and the other to delete from it.
how to add integers to the first text view, the sum of all integers to the second one, and to be from a custom adapter.
thank you.
Activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical">
<EditText
android:id="#+id/edit_ten"
android:hint="Score"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="#+id/btn_add"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Add"/>
<Button
android:id="#+id/btn_delete"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Undo"/>
</LinearLayout>
<ListView
android:id="#+id/list_sinhvien"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</LinearLayout>
item_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<LinearLayout
android:orientation="vertical"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text_ten"
android:textSize="20dp"
android:text="Score"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:id="#+id/text_sdt"
android:textSize="20dp"
android:text="Total"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
MainActivity.java
package com.example.addanddelete;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
ListView listSinhvien;
EditText editTen;
Button btnThem , btnSua;
ArrayList<Sinhvien> arraySinhvien;
CustomAdapter myadapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
anhxa();
arraySinhvien = new ArrayList<Sinhvien>();
myadapter = new CustomAdapter(this , R.layout.item_layout,arraySinhvien);
listSinhvien.setAdapter(myadapter);
btnSua.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final int count = myadapter.getCount();
myadapter.remove(myadapter.getItem(count -1));
myadapter.notifyDataSetChanged();
return;}});
}
private void anhxa(){
listSinhvien = (ListView)findViewById(R.id.list_sinhvien);
editTen = (EditText)findViewById(R.id.edit_ten);
btnThem = (Button)findViewById(R.id.btn_add);
btnSua = (Button)findViewById(R.id.btn_undo);
btnThem.setOnClickListener(this);
btnSua.setOnClickListener(this);
}
#Override
public void onClick(View view) {
switch (view.getId()){
case R.id.btn_add:
Toast.makeText(this, "clicked", Toast.LENGTH_SHORT).show();
String ten = editTen.getText().toString();
String sdt = editTen.getText().toString();
Sinhvien temp = new Sinhvien(R.mipmap.ic_launcher,ten , sdt);
arraySinhvien.add(temp);
myadapter.notifyDataSetChanged();
break;
}
}
}
CustomAdapter.java
package com.example.addanddelete;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.util.ArrayList;
public class CustomAdapter extends ArrayAdapter {
Activity activity;
int layout;
ArrayList<Sinhvien> arrSinhVien;
public CustomAdapter(#NonNull Activity activity, int layout, #NonNull ArrayList<Sinhvien> arrSinhVien) {
super(activity, layout, arrSinhVien);
this.activity = activity;
this.layout = layout;
this.arrSinhVien = arrSinhVien;
}
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
LayoutInflater layoutInflater = activity.getLayoutInflater();
convertView = layoutInflater.inflate(layout, null);
TextView ten = (TextView) convertView.findViewById(R.id.text_score);
TextView sdt = (TextView) convertView.findViewById(R.id.text_total);
ten.setText(arrSinhVien.get(position).getTenSinhvien());
sdt.setText(arrSinhVien.get(position).getSdtSinhvien());
return convertView;
}
}
Sinhvien.java
package com.example.addanddelete;
public class Sinhvien {
String tenSinhvien;
String sdtSinhvien;
public Sinhvien(String iclauncher,String ten, String sdt) {
}
public Sinhvien(int iclauncher,String tenSinhvien, String sdtSinhvien) {
this.tenSinhvien = tenSinhvien;
this.sdtSinhvien = sdtSinhvien;
}
public String getTenSinhvien() {
return tenSinhvien;
}
public void setTenSinhvien(String tenSinhvien) {
this.tenSinhvien = tenSinhvien;
}
public String getSdtSinhvien() {
return sdtSinhvien;
}
public void setSdtSinhvien(String sdtSinhvien) {
this.sdtSinhvien = sdtSinhvien;
}
}

The general behaviour/implementation that you've outlined in your question is very well documented. That said, I'd suggest considering utilising a RecyclerView with associated custom item view and adapter, as opposed to a ListView. There are a few reasons why I'd suggest this.
I did a little searching and found several examples that cover the general idea of your implementation. This example does a great job of illustrating how to achieve what you're seeking. The article begins by outlining some reasons to work with a RecyclerView over a ListView or GridView, then proceeds to give an in-depth run-down on how to implement a RecyclerView with custom adapter (and associated item view and item class).
At a glance, your implementation would require:
An Activity containing your RecyclerView, two Buttons (used for adding and deleting elements from the RecyclerView) and an EditText for taking user input.
A custom item View representing individual items of your RecyclerView list. This would contain the two TextView views (one for displaying the integer and the other for displaying the sum of all integers).
A custom item model Class to represent the data model for the above custom item View. This would hold an integer value and likely some logic for displaying the sum.
A custom RecyclerView adapter (which ties all of the above together). This will need to handle the task of binding data from your dataset (that grows and shrinks based on user input) to instances of your custom items that are to appear in the RecyclerView list. This adapter could also be used by your add and delete item buttons to modify the elements in the RecyclerView list.
The above is outlined in far greater depth in the link I provided earlier.
I sincerely hope that helps!

List item layout containing a CheckBox doesn't work as expected

I have a ListView whose layout contains a CheckBox.
I want both the CheckBox to be active, and list items themselves to be tappable.
It doesn't work.
Yes, I know about the typical solution (setting focusable to false on the CheckBox so that it doesn't steal focus). It doesn't help.
Here's the layout of my list item:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/rl_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp">
<ImageView
android:id="#+id/img_icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_margin="8dp"
android:contentDescription="#null"
android:scaleType="centerInside"
android:visibility="gone"/>
<RelativeLayout
android:id="#+id/rl_texts"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/img_icon"
android:layout_centerVertical="true">
<TextView
android:id="#+id/txt_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textIsSelectable="false"
android:textColor="#color/black"/>
<TextView
android:id="#+id/txt_subtitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/txt_name"
android:textIsSelectable="false"/>
</RelativeLayout>
<CheckBox
android:id="#+id/cb_toggle_switch"
android:focusable="false"
android:focusableInTouchMode="false"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/img_arrow"
android:layout_alignWithParentIfMissing="true"
android:layout_marginRight="25dp"/>
<ImageView
android:id="#+id/img_arrow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/arrow_button"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"/>
</RelativeLayout>
Here's the fragment hosting the list:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="#00000000"
android:clipToPadding="false"
android:divider="#null"
android:dividerHeight="0dp"
android:listSelector="#00000000"
android:paddingBottom="60dp"/>
</RelativeLayout>
Pretty simple.
Only removing CheckBox from the layout fixes the problem (tappability of the list items, obviously; I have no checkbox then, though).
Setting Visibility of the CheckBox to GONE (which I actually have to do for some items) doesn't fix it.
OnItemClickListener doesn't work at all.
OnClickListener of items - rl_container (the root view of the entire list item) and cb_toggle_switch (the checkbox) kind of works.
It's seems not to be deterministic. Clicking repeatedly sometimes fires the click listener of the container and the checkbox, and once you click several times in a row on the checkbox, you're able to force switching its state. But it's never immediate.
This made me suspect that behind the scenes we've got some complex logic regarding focus, but I attached OnFocusChangeListeners to both the container and the checkbox and they are never even notified.
I tried fiddling with descendantFocusability (on the ListView), disabling and enabling focusability and clickability of the container (root) layout.
Removing all subviews and leaving only the container and the checkbox leaves the same problem.
Any ideas? What would you try?

I answered a question similar to this a day or so ago, except it was with image buttons, this should work though if you modify the imagebuttons to checkbox's, check it out..
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
ListView lv;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list);
lv = (ListView) findViewById( R.id.list );
lv.setOnItemClickListener(
new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0,
android.view.View arg1, int arg2, long arg3) {
Toast.makeText( MainActivity.this,
arg2 + " clicked",
Toast.LENGTH_SHORT).show();
}
});
ArrayList<String> items = new ArrayList<String>();
items.add( "item1");
items.add( "item2");
items.add( "item3");
items.add( "item4");
items.add( "item5");
items.add( "item6");
items.add( "item7");
items.add( "item8");
items.add( "item9");
items.add( "item10");
items.add( "item11");
items.add( "item12");
items.add( "item13");
items.add( "item14");
items.add( "item15");
ListAdapter adapter = new ListAdapter( this, items);
lv.setAdapter( adapter );
}
}
and...
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.BaseAdapter;
import android.widget.Toast;
import java.util.List;
public class ListAdapter extends BaseAdapter {
public ListAdapter(Context context,
List<String> items ) {
inflater = LayoutInflater.from( context );
this.context = context;
this.items = items;
}
public int getCount() {
return items.size();
}
public Object getItem(int position) {
return items.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
String item = items.get(position);
View v = null;
if( convertView != null )
v = convertView;
else
v = inflater.inflate( R.layout.item, parent, false);
TextView itemTV = (TextView)v.findViewById( R.id.item);
itemTV.setText( item );
ImageButton button =
(ImageButton)v.findViewById( R.id.button);
button.setOnClickListener(
new OnClickListener() {
public void onClick(View v) {
Toast.makeText( context,
"ImageButton clicked",
Toast.LENGTH_SHORT).show();
}
});
return v;
}
private Context context;
private List<String> items;
private LayoutInflater inflater;
}
Good luck!

I have a ListView with CheckBoxes in the rows. Here's what I did:
For the root view in the row.xml, I added:
android:descendantFocusability="blocksDescendants"
For the child elements (CheckBoxes) in the hierarchy, I added:
android:clickable="false"
android:focusable="false"
android:focusableInTouchMode="false"

If you don't want select it when you press on your list item, you can add an attribute to the checkbox attributes:
android:enabled="false"

Using a layout xml as a template of repeated content in Android

I have a template layout which represents each of my rows in a ListView in my app.
Here is the photorow.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/bodylay"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="#+id/leftbigsquare"
android:layout_width="0dp"
android:layout_height="140dp"
android:layout_weight="1"
android:background="#1000b0"
android:src="#drawable/test1"
/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#d0b0b0"
android:textSize="15sp" >
<ImageView
android:id="#+id/righttupperleft"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#b170b0"
android:src="#drawable/test1" />
<ImageView
android:id="#+id/rightupperright"
android:layout_width="0dp"
android:layout_height="70dp"
android:layout_weight="1"
android:background="#b110b0"
android:src="#drawable/test1" />
</LinearLayout>
<ImageView
android:id="#+id/righthorizontal"
android:layout_width="match_parent"
android:layout_height="70dp"
android:src="#drawable/test1" />
</LinearLayout>
It is repeated row by row. What I want to do is to change "ImageView" child, when I load the image from my server not redesign the row layout each time. Each row will show different "leftbigsquare", "rightupperleft", "rightupperright", "righthorizontal" (look at ImageViews ids) photos.
I researched and saw some examples, but they did that by hardcoding the layout such as :
LinearLayout A = new LinearLayout(this);
A.setOrientation(LinearLayout.HORIZONTAL);
I want to use my photorow.xml as template and just change its attributes such as source in each row.
Is it possible to use my photorow.xml as the template of a row ?
EDIT
My custom adapter :
package com.example.test2;
import java.util.List;
import com.squareup.picasso.Picasso;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class PhotoAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private List<PhotoRow> rowList;
Activity context = null;
public PhotoAdapter(Activity activity, List<PhotoRow> rows) {
mInflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
rowList = rows;
context = activity;
}
#Override
public int getCount() {
return rowList.size();
}
#Override
public Object getItem(int position) {
return rowList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView;
rowView = mInflater.inflate(R.layout.photorow, null);
//Here I get the ImageView of my photorow xml
ImageView leftBigSquare = (ImageView) rowView
.findViewById(R.id.leftbigsquare);
// Here I get the proper URL from rowList by using Picasso framework
Picasso.with(context).load(rowList.get(position).getUrls().get(0))
.resize(50, 50).centerCrop().into(leftBigSquare);
//So how can I put the leftBigSquare ImageView to my photorow template with its proper attributes
return rowView;
}
}

Yes, of course, you can use same rowview XML and still have different data in every row.
You must use a custom adapter and then inflate your row s from that adapter and based on several conditions change your data.
Paste your custom adapter code and I will show you how to do it.

Android GridMenu layout - images not showing up

I am creating a simple app for my own use. I want to have a simple menu using GridLayout, using arrays and ArrayAdapter.
Here is my java code:
package com.jlo.love;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
public class Love extends Activity implements OnItemClickListener{
/** Called when the activity is first created. */
GridView menu;
private String[] menu_text = {
"Location",
"Rotate",
"Gallery",
"View",
"My Places",
"Search"};
Integer[] menu_icon = {
android.R.drawable.ic_menu_mylocation,
android.R.drawable.ic_menu_rotate,
android.R.drawable.ic_menu_gallery,
android.R.drawable.ic_menu_view,
android.R.drawable.ic_menu_myplaces,
android.R.drawable.ic_menu_search};
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
menu = (GridView)findViewById(R.id.Menu);
menu.setOnItemClickListener(Love.this);
menu.setAdapter(new MenuItem(Love.this, R.layout.menu_item, menu_text));
}
public class MenuItem extends ArrayAdapter<String> {
public MenuItem(Context context, int textViewResourceId, String[] objects) {
super(context, textViewResourceId, objects);
}
}
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater=getLayoutInflater();
View row=inflater.inflate(R.layout.menu_item, parent, false);
TextView tv=(TextView)row.findViewById(R.id.text);
ImageView iv = (ImageView)row.findViewById(R.id.Menu);
tv.setText(menu_text[position]);
iv.setImageResource(menu_icon[position]);
return row;
}
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
}
}//end class
these are my XMLs
menu_item.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal|top"
android:maxLines="2"
android:textColor="#000"
android:drawablePadding="5dp"
android:minLines="2"
android:background="#null">
</TextView>
My second XML - menu.xml
<?xml version="1.0" encoding="utf-8"?>
<GridView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/Menu"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:verticalSpacing="25dp"
android:horizontalSpacing="10dp"
android:columnWidth="70dp"
android:background="#ffffff"
android:stretchMode="columnWidth"
android:gravity="center_horizontal|top"
android:scrollbars="none"
android:paddingTop="10dp">
</GridView>
I have the 6 icons, on all the 3 drawable folders.
When i launch it on the simulator, this is what i have-
the text shows up, but no images icon show up.
Screenshot
Could anyone point me in the right direction..

If I understood everything correctly you wan some icons to appear with the text that is showing in the grid view. But I noticed that your menu item xml does not have an image view, you should be getting a NULLPOINTER EXCEPTION, have you posted the correct xml/java ?

Android - Retrieving a string from a specific element of a gridview

I'm pretty new to Android and I have been playing about with GridView. I've got stuck trying to retrieve Strings from individual elements of the GridView so that I can save state based on the changes a user has made.
I've mocked up a stripped down version of what I'm trying to do for this question:
The view of each element in the grid is made up of a TextView and an EditText defined by the following xml file; grid_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id = "#+id/single_item_id"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<TextView
android:id = "#+id/label"
android:layout_width = "fill_parent"
android:layout_height="wrap_content"
android:inputType="text">
</TextView>
<EditText
android:id = "#+id/item_value"
android:layout_width = "fill_parent"
android:layout_height="wrap_content"
android:inputType="text">
</EditText>
</LinearLayout>
My main.xml, consisting of a button and a gridview:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="#+id/editbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onRetrieveButtonClick"
android:text="#string/get" android:clickable="true"/>
<GridView
android:id="#+id/gridview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:columnWidth="250dp"
android:stretchMode="columnWidth"
android:gravity="center"
android:paddingTop="50dp">
</GridView>
</LinearLayout>
My Activity Class:
package com.jdev.simplegrid;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.GridView;
import android.widget.Toast;
public class SimpleGridActivity 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.gridview);
//Some hard-coded sample data -each person has a birth-name and a nickname
ArrayList<Person> people = new ArrayList<Person>();
people.add(new Person("David","Dave"));
people.add(new Person("Bruce","Batman"));
people.add(new Person("John","J"));
gridview.setAdapter(new SimpleAdapter(this, people));
}
public void onRetrieveButtonClick(View view)
{
Toast.makeText(getBaseContext(), "Get the String value of EditText at position 1 of the gridview e.g Batman", Toast.LENGTH_LONG).show();
//Get the String value of EditText at position 1 of the gridview. e.g Batman
}
}
And finally my Adapter for the view:
package com.jdev.simplegrid;
import java.util.ArrayList;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.TextView;
public class SimpleAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<Person> personList;
public SimpleAdapter(Context c, ArrayList<Person> people) {
mContext = c;
personList = people;
}
public int getCount() {
return personList.size();
}
public Person getItem(int position) {
return personList.get(position);
}
public long getItemId(int position) {
return 0;
}
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view=inflater.inflate(R.layout.grid_item, parent, false);
TextView birthnameLabel=(TextView)view.findViewById(R.id.birthname);
birthnameLabel.setText(personList.get(position).getBirthname());
EditText nicknameText=(EditText)view.findViewById(R.id.nickname);
nicknameText.setText(personList.get(position).getNickname());
return view;
}
}
So my question is, how do I retrieve the a value from the gridview on the click of a button. Say the value "Batman" in EditText at position 1 of the gridview.
I feel like I'm really missing something here!

gridview.getAdapter().getItem(1).getNickname();
Is that what you're looking for? assuming your Person object has a getter method for the nickname of course. - Sorry, obviously I could've seen that in your custom adapter.
If your the idea is the user can change the nickname in the EditText, you'll probably want to add a TextChangedListener (TextWatcher) to each of them and after editting update the nickname on the Person object associated with that position in the grid; e.g. with the help of a setNickname(String) method.
The easiest way to think about this is probably in terms of 'models' and 'views'. The TextViews and EditTexts are the views, whereas the Person objects in the adapter are the models. If you want to make any changes to the data, modify the underlying models with some logic and simply have the views update/refresh after that.