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Set background color of one item in list view if switch is turned on

Hi I am completing a school project, and I need the background of a list item to be red with white text if the urgent switch is on. Currently, if I add an item with the urgent switch all of the background of the list view changes. I seen somewhere someone said to use an array, but when I tried that block of code it wouldn't work. Thanks in advance!
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ListView
android:id="#+id/listView"
android:layout_width="match_parent"
android:layout_height="576dp"
android:layout_columnSpan="3"
android:focusableInTouchMode="true"
android:isScrollContainer="true">
</ListView>
<EditText
android:id="#+id/editText"
android:layout_width="209dp"
android:layout_height="wrap_content"
android:layout_weight="0"
android:hint="#string/typeHere"
android:textSize="20dp" />
<Switch
android:id="#+id/switch1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_row="1"
android:layout_column="1"
android:layout_weight="0"
android:text="#string/urgent" />
<Button
android:id="#+id/buttonAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_row="1"
android:layout_column="2"
android:layout_weight="0"
android:text="#string/add" />
</GridLayout>
<?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="vertical">
<TextView
android:id="#+id/to_do_TextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Testing"
android:textSize="25dp" />
</LinearLayout>
public class MainActivity extends AppCompatActivity {
Button buttonAdd;
Boolean urgent = false;
EditText editText;
ListAdapter adapter;
ListView myListView;
Switch switch1;
ArrayList<String> itemList = new ArrayList<String>( Arrays.asList("Clean Bathroom","Buy Apples","Buy Bananas" ));
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//declare variables
buttonAdd = findViewById(R.id.buttonAdd);
editText = findViewById(R.id.editText);
switch1 = findViewById(R.id.switch1);
ListView myListView = findViewById(R.id.listView);
myListView.setAdapter(adapter = new ListAdapter());
buttonAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
itemList.add(editText.getText().toString());
editText.setText("");
//also tried setting value you here and using in getView
if(switch1.isChecked()){
urgent = true;
} else{
urgent = false;
}adapter.notifyDataSetChanged();
}
});
}
// adapter class
class ListAdapter extends BaseAdapter{
#Override
public int getCount() {
return itemList.size();
}
#Override
public Object getItem(int position) {
return itemList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View old, ViewGroup parent) {
View newView =old;
LayoutInflater inflater = getLayoutInflater();
if(newView==null){
newView = inflater.inflate(R.layout.item,parent,false);
}
TextView textview= newView.findViewById(R.id.to_do_TextView);
textview.setText(getItem(position).toString());
if(switch1.isChecked()){
textview.setBackgroundColor(Color.RED);
textview.setText(getItem(position).toString());
}return newView;
}
//to do row class
class ToDoItem {
String name;
Boolean urgent;
}}}

This happen because you use a global variable Boolean urgent to all items in list.
You need send to ListAdapter the information if is urgent with a String doing use of class ToDoItem like this:
itemList.add(new ToDoItem(itemList.add(editText.getText().toString()), switch1.isChecked()));
the full code would be:
public class MainActivity extends AppCompatActivity {
Button buttonAdd;
EditText editText;
ListAdapter adapter;
ListView myListView;
Switch switch1;
//Create list
ArrayList<ToDoItem> itemList = new ArrayList<>();
//add data
itemList.add(new ToDoItem("Clean Bathroom", false);
itemList.add(new ToDoItem("Buy Apples", false);
itemList.add(new ToDoItem("Buy Bananas", true);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//declare variables
buttonAdd = findViewById(R.id.buttonAdd);
editText = findViewById(R.id.editText);
switch1 = findViewById(R.id.switch1);
ListView myListView = findViewById(R.id.listView);
myListView.setAdapter(adapter = new ListAdapter());
buttonAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Here set to list a item with String and boolean
itemList.add(new ToDoItem(itemList.add(editText.getText().toString()), switch1.isChecked()));
editText.setText("");
adapter.notifyDataSetChanged();
}
});
}
// adapter class
class ListAdapter extends BaseAdapter{
#Override
public int getCount() {
return itemList.size();
}
//Here get a item like ToDoItem
#Override
public ToDoItem getItem(int position) {
return itemList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View old, ViewGroup parent) {
View newView =old;
LayoutInflater inflater = getLayoutInflater();
if(newView==null){
newView = inflater.inflate(R.layout.item,parent,false);
}
TextView textview= newView.findViewById(R.id.to_do_TextView);
//Here get a name
textview.setText(getItem(position).name);
if(getItem(position).urgent){
textview.setBackgroundColor(Color.RED);
}
return newView;
}
}
//Class that have the information on items
class ToDoItem {
String name;
Boolean urgent;
public ToDoItem(String name, Boolean urgent) {
this.name = name;
this.urgent = urgent;
}
}
}

Creating an Image Gallery

I want to create an image gallery (with lots of pictures). I need a GridView to show the various categories, and in every row there's an ImageView and a TextView. All the pictures are loaded in the drawable folder. According to the category the user chooses, I need to show all the pictures of a folder in a new Activity. My problem is with the adapter for the gridview. I'm trying to create a custom one but with little success. All the examples I found aren't useful for my task...

Here is a sample code for creating a GridView gallery with text.
At first, add GridView to your main layout(ex: activity_main.xml).
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<GridView
android:numColumns="auto_fit"
android:gravity="center"
android:columnWidth="100dp"
android:stretchMode="columnWidth"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/grid"/>
</LinearLayout>
Then, you need to create a layout to inflate the view of Custom Adapter.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp" >
<ImageView
android:id="#+id/grid_image"
android:layout_width="50dp"
android:layout_height="50dp">
</ImageView>
<TextView
android:id="#+id/grid_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:textSize="9sp" >
</TextView>
</LinearLayout>
Create a custom adapter which will receive array of image resources and string.
public class CustomGrid extends BaseAdapter{
private Context mContext;
private final String[] names;
private final int[] Imageid;
public CustomGrid(Context c,String[] names,int[] Imageid ) {
mContext = c;
this.Imageid = Imageid;
this.names = names;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return names.length;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View grid;
LayoutInflater inflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
grid = new View(mContext);
grid = inflater.inflate(R.layout.grid_single, null);
TextView textView = (TextView) grid.findViewById(R.id.grid_text);
ImageView imageView = (ImageView)grid.findViewById(R.id.grid_image);
textView.setText(names[position]);
imageView.setImageResource(Imageid[position]);
} else {
grid = (View) convertView;
}
return grid;
}
}
Finally set this Custom Adapter to the GridView adapter in your activity:
public class MainActivity extends Activity
{
GridView grid;
String[] names =
{
"String1",
"String2",
"String3",
"String4",
"String5",
"String6",
"String8",
"String9",
"String10"
} ;
int[] imageId =
{
R.drawable.image1,
R.drawable.image2,
R.drawable.image3,
R.drawable.image4,
R.drawable.image5,
R.drawable.image6,
R.drawable.image7,
R.drawable.image8,
R.drawable.image9,
R.drawable.image10
};
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CustomGrid adapter = new CustomGrid(MainActivity.this, names, imageId);
grid=(GridView)findViewById(R.id.grid);
grid.setAdapter(adapter);
grid.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
Toast.makeText(MainActivity.this, "You Clicked at " +names[+ position], Toast.LENGTH_SHORT).show();
}
});
}
}
Hope this helps. :)

Remove item from gridview

I'm removing images from a gridview when a button is pressed.
The images does remove fine and the gridview also updates with the call "adapter.notifyDataSetChanged();".
When an imageview is removed another image next to this position should take its position. This happens, but the image here won't reload so there's just a blank space? How can I get this imageview to reload its image?
The problem:
Here is my gridadapter:
public class FavoriteMovieGridAdapter extends BaseAdapter {
Context context;
ArrayList<DataFavorites> List;
FavoritesMovie fragment;
private static LayoutInflater inflater = null;
FavoriteMovieGridAdapter adapter = this;
public FavoriteMovieGridAdapter(Context context, ArrayList<DataFavorites> List, FavoritesMovie fragment) {
this.context = context;
this.List = List;
this.fragment = fragment;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return List.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// Avoid unneccessary calls to findViewById() on each row
final ViewHolder holder;
/*
* If convertView is not null, reuse it directly, no inflation
* Only inflate a new View when the convertView is null.
*/
if (convertView == null) {
convertView = inflater.inflate(R.layout.favorite_grid_item, null);
holder = new ViewHolder();
holder.poster = (ImageView) convertView.findViewById(R.id.upcoming_image);
holder.editbutton = (ImageView) convertView.findViewById(R.id.delete_item);
// The tag can be any Object, this just happens to be the ViewHolder
convertView.setTag(holder);
}
else{
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
final View finalConvertView = convertView;
final DataFavorites e;
new DataFavorites();
e = List.get(position);
String url = String.valueOf(e.getUrl());
// load image url into poster
// Seems as if this doesn't run for the imageview next to this when this view is removed?
Picasso.with(context).load(url).fit().placeholder(R.drawable.movie_back).into(holder.poster);
// Create onclick and show edit button
convertView.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
// show edit button
holder.editbutton.setVisibility(View.VISIBLE);
YoYo.with(Techniques.FadeIn).duration(700).playOn(finalConvertView.findViewById(R.id.delete_item));
// onclick edit button remove item and update gridview
holder.editbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
YoYo.with(Techniques.ZoomOut).duration(700).playOn(finalConvertView.findViewById(R.id.favorite_relative));
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
adapter.List.remove(e);
adapter.notifyDataSetChanged();
// Delete specific movie from data base
DatabaseHandlerMovie db = new DatabaseHandlerMovie(context);
// Reading all movies
db.deleteMovie(e);
}
}, 1000);
}
});
return false;
}
});
return convertView;
}
static class ViewHolder {
ImageView poster;
ImageView editbutton;
}
}
My grid item layout:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/favorite_relative"
android:layout_centerHorizontal="true"
android:gravity="center_horizontal">
<ImageView android:layout_width="123.3dp"
android:layout_height="185.3dp"
android:id="#+id/upcoming_image"
android:scaleType="fitXY" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/delete_item"
android:src="#drawable/ic_remove_circle_outline_white_24dp"
android:tint="#color/colorPrimaryDark"
android:clickable="true"
android:visibility="gone"
android:layout_alignRight="#+id/upcoming_image"
android:layout_alignEnd="#+id/upcoming_image"/>
</RelativeLayout>
My grid layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context=".Favorites"
android:background="#FFFFFF"
android:focusableInTouchMode="true">
<GridView
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:id="#+id/movies_gridlayout"
android:paddingRight="-1dp"
android:paddingEnd="-1dp"
android:numColumns="3"
android:background="#ffffff"
android:visibility="invisible"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/favorite_none"
android:text="No favorite movies found"
android:textSize="15sp"
android:visibility="gone"
android:textColor="#color/SecondaryText"
/>
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone"
>
</ProgressBar>
</FrameLayout>

Turns out a 3rd-party lib was causing this:
YoYo.with(Techniques.ZoomOut).duration(700).playOn(finalConvertView.findViewById(R.id.favorite_relative));

you will have adapter and mainactivity for gridview
So u will have to implement public interface in both of them to communicate
following code may help you :)
In Adapter class add following code
private OnItemClickListner onItemClickListner;
public MyAdapter(Context c, List<PDFDoc> pdfDocs,OnItemClickListner onItemClickListner) {
this.context = c;
this.pdfDocs = pdfDocs;
this.onItemClickListner=onItemClickListner;
}
public interface OnItemClickListner {
void removefromadapter(int position);
}
ImageButton imageButton = view.findViewById(R.id.cancelid);
imageButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// write your stuff here
onItemClickListner.removefromadapter(position);
}
});
In MainActivity of gridview add following code
implements OnItemClickListner required**
public class addclient_fragment extends Fragment implements MyAdapter.OnItemClickListner {
you will required to add this method in mainactivity
#Override
public void removefromadapter(int position) {
// write your stuff here
}

Android Dynamic List View

I want to fix a button on top of the layout and just below the button a dynamic edit text is created. I am creating my own Adapter. On button click another activity starts and returns string which is to be shown on the list view items below the button. How can I do this ?
My XML Layout -
<?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="vertical" >
<Button
android:id="#+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<EditText
android:id="#+id/etList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" >
</EditText>
</LinearLayout>
My list view adapter -
package com.example.tasktable;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;
public class TaskAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
Button click;
TextView textView;
public TaskAdapter(Context context, String[] values) {
super(context, R.layout.list_view, values);
this.context = context;
this.values = values;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
LayoutInflater inflator = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflator.inflate(R.layout.list_view, parent, false);
click = (Button) rowView.findViewById(R.id.button1);
textView = (TextView) rowView.findViewById(R.id.etList);
textView.setText(values[position]);
return rowView;
}
}
I don't want to inflate button with every edit text.

You can position layout elements with Relative Layouts https://developer.android.com/reference/android/widget/RelativeLayout.html

//try this way, hope this will help you...
**XML** code
**activity.xml**
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<Button
android:id="#+id/btnAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:id="#+id/lnrEdit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</ScrollView>
</LinearLayout>
**list_activity.xml**
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
**list_item.xml**
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<TextView
android:id="#+id/txtValue"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<Button
android:id="#+id/btnSelect"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Select"/>
</LinearLayout>
**ACTIVITY** code
**MyActivity**
public class MyActivity extends Activity{
private Button btnAdd;
private LinearLayout lnrEdit;
private final int GET_LIST_ITEM = 1;
private HashMap<String,String> listItemMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
btnAdd = (Button) findViewById(R.id.btnAdd);
lnrEdit = (LinearLayout) findViewById(R.id.lnrEdit);
listItemMap = new HashMap<String, String>();
btnAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MyActivity.this,MyListActivty.class);
startActivityForResult(intent,GET_LIST_ITEM);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == RESULT_OK){
if(requestCode == GET_LIST_ITEM);
{
String getListValue = data.getStringExtra("value");
int index = data.getIntExtra("index",0);
if(listItemMap.containsKey(String.valueOf(index))){
Toast.makeText(this,"This item already taken !!!",Toast.LENGTH_LONG).show();
} else{
listItemMap.put(String.valueOf(index),getListValue);
EditText editText = new EditText(this);
editText.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
editText.setId(index);
editText.setText(getListValue);
editText.setTag(getListValue);
editText.setFocusable(false);
editText.setFocusableInTouchMode(false);
editText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String value = v.getTag().toString();
Toast.makeText(MyActivity.this,value,Toast.LENGTH_SHORT).show();
}
});
lnrEdit.addView(editText);
}
}
}
}
}
**MyListActivity**
public class MyListActivty extends ListActivity{
private String[] listArray;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_activity);
listArray = new String[]{"Android4.1","Android4.2","Android4.3","Android4.4","Android4.5"};
setListAdapter(new TaskAdapter(this,listArray));
}
class TaskAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
public TaskAdapter(Context context, String[] values) {
super(context, R.layout.list_item, values);
this.context = context;
this.values = values;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView==null){
holder = new ViewHolder();
convertView = LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
holder.button = (Button) convertView.findViewById(R.id.btnSelect);
holder.textView = (TextView) convertView.findViewById(R.id.txtValue);
convertView.setTag(holder);
} else{
holder = (ViewHolder)convertView.getTag();
}
holder.textView.setText(values[position]);
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent();
intent.putExtra("index",position);
intent.putExtra("value",values[position]);
setResult(RESULT_OK,intent);
finish();
}
});
return convertView;
}
#Override
public int getCount() {
return values.length;
}
}
static class ViewHolder{
Button button;
TextView textView;
}
}

ListView / ListAdapter with 2 strings in Android project

I am working on Android project. I follow tutorial from http://www.vogella.com/articles/AndroidSQLite/article.html but I stuck on something. Tutorial shows how to use Class with 1 String object. I am working with 2 String objects. So I changed few things (add new String to my class, change layout.simple_list_item_1 to android.R.layout.simple_list_item_2 etc.) And now the question is - how to make something to get Stoliki class objects (override toString() gives me only 1 item, so It's useless).
Class Stoliki
public class Stoliki {
private long id;
private String numer;
private String opis;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getNumer() {
return numer;
}
public void setNumer(String numer) {
this.numer = numer;
}
public String getOpis() {
return opis;
}
public void setOpis(String opis) {
this.opis = opis;
}
}
Activity
import android.app.ListActivity;
import android.os.Bundle;
import java.util.List;
import java.util.Random;
import android.view.View;
import android.widget.ArrayAdapter;
public class FirstGridPage extends ListActivity {
private StolikiDataSource datasource;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_list_stoliki);
datasource = new StolikiDataSource(this);
datasource.open();
List<Stoliki> values = datasource.getAllStoliki();
// Use the SimpleCursorAdapter to show the
// elements in a ListView
ArrayAdapter<Stoliki> adapter = new ArrayAdapter<Stoliki>(this,
android.R.layout.simple_list_item_1, values);
setListAdapter(adapter);
}
// Will be called via the onClick attribute
// of the buttons in main.xml
public void onClick(View view) {
#SuppressWarnings("unchecked")
ArrayAdapter<Stoliki> adapter = (ArrayAdapter<Stoliki>) getListAdapter();
Stoliki stolik = null;
switch (view.getId()) {
case R.id.add:
String[] stoliki_numer = new String[] { "1", "2", "3" };
String[] stoliki_opis = new String[] { "Czerwony", "Niebieski", "Zielony" };
int nextInt = new Random().nextInt(3);
// Save the new comment to the database
stolik = datasource.createStolik(stoliki_numer[nextInt], stoliki_opis[nextInt]);
adapter.add(stolik);
break;
case R.id.delete:
if (getListAdapter().getCount() > 0) {
stolik = (Stoliki) getListAdapter().getItem(0);
datasource.deleteStolik(stolik);
adapter.remove(stolik);
}
break;
}
adapter.notifyDataSetChanged();
}
#Override
protected void onResume() {
datasource.open();
super.onResume();
}
#Override
protected void onPause() {
datasource.close();
super.onPause();
}
}

http://www.youtube.com/watch?v=wDBM6wVEO70. Listview talk by Romain guy( android developer at google).
Main.xml
<ListView android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:focusableInTouchMode="false"
android:listSelector="#android:color/transparent"
android:layout_weight="2"
android:headerDividersEnabled="false"
android:footerDividersEnabled="false"
android:dividerHeight="8dp"
android:divider="#000000"
android:cacheColorHint="#000000"
android:drawSelectorOnTop="false">
</ListView>
</LinearLayout>
Customw row. row.xml
<?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="horizontal"
android:background="#ffffff"
>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:background="#drawable/itembkg"
/>
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="TextView" />
</LinearLayout>
public class CustomListView extends Activity {
/** Called when the activity is first created. */
ListView lv1;
Customlistadapter cus;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Button b= (Button) findViewById(R.id.remove);
lv1 = (ListView) findViewById(R.id.list);
cus= new Customlistadapter(this);
lv1.setAdapter(cus);
}
}
Custom list adapter. Inflate custom layout for each row.
public class Customlistadapter extends ArrayAdapter {
private LayoutInflater mInflater;
Context c;
public Customlistadapter(CustomListView customListView) {
super(customListView, 0);
// TODO Auto-generated constructor stub
this.mInflater = LayoutInflater.from(customListView);
c=customListView;
}
public int getCount() {
return 20; // number of listview rows.
}
public Object getItem(int arg0) {
return arg0;
}
public long getItemId(int arg0) {
return arg0;
}
public View getView(final int arg0, View arg1, ViewGroup arg2) {
final ViewHolder vh;
vh= new ViewHolder();
if(arg1==null )
{
arg1=mInflater.inflate(R.layout.row, arg2,false);
vh.tv1= (TextView)arg1.findViewById(R.id.textView1);
vh.tv2= (TextView)arg1.findViewById(R.id.textView2);
}
else
{
arg1.setTag(vh);
}
vh.tv1.setText("hello");
vh.tv2.setText("hello");
return arg1;
}
static class ViewHolder //use a viewholder for smooth scrolling and performance.
{
TextView tv1,tv2;
}
}
Edit:
Your activity will have a listview. This is set in oncreate setContentView(R.layout.activity_main);. The main layout will have a listview. You set the adapter of listview as listview.setAdapter(youradapter);
Then listview will have custom layout ie row.xml inflated for each row item. You custom adapter for listview is where the row.xml is inflated. You defined your class CustomAdapter which extends ArrayAdapter. You override a set of methods.
getCount() --- size of listview.
getItem(int position) -- returns the position
getView(int position, View convertView, ViewGroup parent)
// position is the position in the listview.
//convertview - view that is tobe inflated
// you will return the view that is infated.
You will have to use a viewholder for smooth scrolling and performance. Imagine 1000 rows is lstview with images it may cause memory exceptions. One way to get rid of this is to recycle views. The visible views(rows) are not recycled. The video in the link at the top has a detail explanation on the topic
activity_main.xml
<?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"
android:background="#0095FF">
<ListView android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:focusableInTouchMode="false"
android:listSelector="#android:color/transparent"
android:layout_weight="2"
android:headerDividersEnabled="false"
android:footerDividersEnabled="false"
android:dividerHeight="8dp"
android:divider="#000000"
android:cacheColorHint="#000000"
android:drawSelectorOnTop="false">
</ListView>
</LinearLayout>
row.xml (layout inflated for each listview row)
<?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" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Header" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="80dp"
android:layout_gravity="center"
android:text="TextView" />
</LinearLayout>
MainActivity
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView ll = (ListView) findViewById(R.id.list);
CustomAdapter cus = new CustomAdapter();
ll.setAdapter(cus);
}
class CustomAdapter extends BaseAdapter
{
LayoutInflater mInflater;
public CustomAdapter()
{
mInflater = (LayoutInflater) MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return 30;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
final ViewHolder vh;
vh= new ViewHolder();
if(convertView==null )
{
convertView=mInflater.inflate(R.layout.row, parent,false);
vh.tv2= (TextView)convertView.findViewById(R.id.textView2);
vh.tv1= (TextView)convertView.findViewById(R.id.textView2);
}
else
{
convertView.setTag(vh);
}
vh.tv1.setText("my text");
vh.tv2.setText("Postion = "+position);
return convertView;
}
class ViewHolder
{
TextView tv1,tv2;
}
}
}