I'm having a main menu which contains 4 different buttons. When you click a button a listview should appear. Finally, when you select one of the Item in the list, a new activity should start which show some text. When I click on the Tiffins button, the app closes instead of showing the listview. Please help.
Here is my code.
activity_main.xml
<RelativeLayout 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"
android:background="#drawable/icon"
tools:context=".MainActivity" >
<Button
android:id="#+id/curries"
android:layout_width="150dp"
android:layout_height="130dp"
android:layout_alignParentRight="true"
android:layout_alignTop="#+id/tiffins"
android:drawableBottom="#drawable/curries"
android:text="#string/Curries"
android:onClick="CurriesMenu"/>
<Button
android:id="#+id/tiffins"
style="#style/AppTheme"
android:layout_width="150dp"
android:layout_height="130dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="40dp"
android:drawableBottom="#drawable/tiffins"
android:text="#string/Tiffins"
android:onClick="TiffinsMenu"/>
<TextView
android:id="#+id/textView2"
android:layout_width="100dp"
android:layout_height="30dp"
android:layout_alignBottom="#+id/textView1"
android:layout_alignParentLeft="true"
android:layout_marginLeft="19dp"
android:text="#string/Tiffins"
android:textSize="25dp" />
<TextView
android:id="#+id/textView1"
android:layout_width="100dp"
android:layout_height="30dp"
android:layout_above="#+id/curries"
android:layout_alignLeft="#+id/curries"
android:layout_marginLeft="24dp"
android:text="#string/Curries"
android:textSize="25dp" />
<TextView
android:id="#+id/textView3"
android:layout_width="100dp"
android:layout_height="30dp"
android:layout_alignLeft="#+id/textView2"
android:layout_centerVertical="true"
android:text="#string/Snacks"
android:textSize="25dp" />
<Button
android:id="#+id/Snacks"
android:layout_width="150dp"
android:layout_height="130dp"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView3"
android:drawableBottom="#drawable/snacks"
android:text="#string/Snacks"
android:onClick="SnacksMenu" />
<TextView
android:id="#+id/textView4"
android:layout_width="100dp"
android:layout_height="30dp"
android:layout_alignBaseline="#+id/textView3"
android:layout_alignBottom="#+id/textView3"
android:layout_alignLeft="#+id/curries"
android:layout_alignParentRight="true"
android:text="#string/Pindivantalu"
android:textSize="25dp" />
<Button
android:id="#+id/pindivantalu"
android:layout_width="150dp"
android:layout_height="130dp"
android:layout_alignBottom="#+id/Snacks"
android:layout_alignParentRight="true"
android:drawableBottom="#drawable/pindivantalu"
android:text="#string/Pindivantalu"
android:onClick="PindivantaluMenu" />
activity_display_tiffinsmenu.xml
<RelativeLayout 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=".DisplayTiffinsmenu" >
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:background="#drawable/tiffins1"
android:entries="#array/tiffinslist" >
</ListView>
MainActivity.java
package com.example.andhrarecipies;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void TiffinsMenu(View view){
Intent intent = new Intent(this, DisplayTiffinsmenu.class);
startActivity(intent);
}
public void CurriesMenu(View view){
Intent intent = new Intent(this, DisplayCurriesmenu.class);
startActivity(intent);
}
public void SnacksMenu(View view){
Intent intent = new Intent(this, DisplaySnacksmenu.class);
startActivity(intent);
}
public void PindivantaluMenu(View view){
Intent intent = new Intent(this, DisplayPindivantalumenu.class);
startActivity(intent);
}
}
DisplayTiffinsmenu.java
package com.example.andhrarecipies;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.app.ListActivity;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class DisplayTiffinsmenu extends ListActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_display_tiffinsmenu);
ListView TiffinsMenu = (ListView) this.findViewById(R.id.listView1);
String[] menu = getResources().getStringArray(R.array.tiffinslist);
setListAdapter(new ArrayAdapter<String>(this, R.layout.activity_display_tiffinsmenu, menu));
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
Object o = this.getListAdapter().getItem(position);
String keyword = o.toString();
Toast.makeText(this, "you have selected" + keyword, Toast.LENGTH_LONG).show() ;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_display_tiffinsmenu, menu);
return true;
}
}
When using ListActivity, your activity_display_tiffinsmenu.xml-layout must contain a ListView with the android:id attribute set to #android:id/list like this:
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
Related
I'm trying to create a kind of game using Android Studio. Till now I have done a gridview wich shows players stored in a database. I have had some problems with gridView.setOnItemClickListener, I have had to do it by putting the code into gridView's Adparter.class so if you know how I can do that into gridView's activity please tell me.
My problem now is that when you click on a player a popup window appears in which you could change the player's name or his genre. When you click on Confirm's button the database will automatically been updated, but it doesn't works. I have try to do it step by step by using Toast in order to know if it run that part or not, the problem could be the context, but maybe I'm crazy.
I left you some pics and the code related to it.
Gridview's pic -> http://i.stack.imgur.com/GO4ms.png
PopUp windos's pic -> http://i.stack.imgur.com/aAvcm.png
gridView's adapter class
package es.fingerlabs.gamecohol;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class AdaptadorAmigos extends BaseAdapter {
private Context context;
private ArrayList<Amigo> misAmigos = new ArrayList<Amigo>();
public AdaptadorAmigos(ArrayList<Amigo> list, Context context) {
this.misAmigos = list;
this.context = context;
}
public View getView(final int position, View convertView, ViewGroup parent) {
View gridView = convertView;
if (gridView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
gridView = inflater.inflate(R.layout.item_amigo, null);
}
TextView TextoNombreJugador = (TextView)gridView.findViewById(R.id.tvNombreAmigo);
TextoNombreJugador.setText(misAmigos.get(position).getNombre());
//Handle buttons and add onClickListeners
ImageButton deleteBtn = (ImageButton)gridView.findViewById(R.id.btEliminarAmigo);
deleteBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//do something
AmigosSQLiteHelper amigosdbh = new AmigosSQLiteHelper(context, "DBAmigos", null, 1);
SQLiteDatabase db = amigosdbh.getWritableDatabase();
db.delete("Amigos", "id_amigo="+misAmigos.get(position).getId(), null);
misAmigos.remove(position); //or some other task
//Eliminar de la base de datos **************
notifyDataSetChanged();
}
});
// ******* THIS IS WHAT I REFER TO PUT IT ON GRIDVIEW'S ACTIVITY *******
gridView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Toast.makeText(context,"Id "+misAmigos.get(position).getId()+" Vidas "+misAmigos.get(position).getVidas(), Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, VistaAmigo.class);
intent.putExtra("Id", (misAmigos.get(position).getId()));
intent.putExtra("Nombre", (misAmigos.get(position)).getNombre());
intent.putExtra("Genero", (misAmigos.get(position)).getGenero());
context.startActivity(intent);
}
});
return gridView;
}
#Override
public int getCount() {
return misAmigos.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
}
gridView's class
package es.fingerlabs.gamecohol;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class SeleccionarAmigos extends AppCompatActivity {
private ArrayList<Amigo> misAmigos;
private GridView gridView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_amigos);
gridView = (GridView) findViewById(R.id.gvAmigos);
refrescarLista();
/* IF I PUT THAT HERE IT DOES NOTHING
gridView.setOnItemClickListener(new OnItemClickListener() {
#Override public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {
Toast.makeText(getApplicationContext(),misAmigos.get(position).getNombre(), Toast.LENGTH_SHORT).show();
}
});*/
/*gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// get the data to pass to the activity based on the position clicked
Intent intent = new Intent(SeleccionarAmigos.this, VistaAmigo.class);
intent.putExtra("Id", (misAmigos.get(position).getId()));
intent.putExtra("Nombre", (misAmigos.get(position)).getNombre());
intent.putExtra("Genero", (misAmigos.get(position)).getGenero());
startActivity(intent);
}
});*/
}
public void obtenerAmigos(){
misAmigos = new ArrayList<Amigo>();
AmigosSQLiteHelper amigosdbh = new AmigosSQLiteHelper(this, "DBAmigos", null, 1);
SQLiteDatabase db = amigosdbh.getReadableDatabase();
Cursor c = db.rawQuery(" SELECT Id_amigo,Nombre,Genero FROM Amigos ", null);
//Nos aseguramos de que existe al menos un registro
if (c.moveToFirst()) {
//Recorremos el cursor hasta que no haya más registros
do {
int id = c.getInt(0);
String nombre= c.getString(1);
String genero= c.getString(2);
Amigo nuevoAmigo = new Amigo(nombre,genero,null);
nuevoAmigo.setId(id);
this.misAmigos.add(nuevoAmigo);
} while(c.moveToNext());
}
db.close();
}
public void refrescarLista(){
obtenerAmigos();
AdaptadorAmigos adapter = new AdaptadorAmigos(misAmigos, this);
gridView.setAdapter(adapter);
}
}
PopUp window class
package es.fingerlabs.gamecohol;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupWindow;
import android.widget.Toast;
public class VistaAmigo extends Activity {
private int id;
private String nombre;
private String genero;
private EditText etNombre;
private EditText etGenero;
private Button btConfirmar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vistaamigo);
etNombre = (EditText) findViewById(R.id.etNombreVistaAmigo);
etGenero = (EditText) findViewById(R.id.etGeneroVistaAmigo);
btConfirmar = (Button) findViewById(R.id.btConfirmarAmigo);
Intent i = getIntent();
i.getIntExtra("Id", id);
nombre = i.getStringExtra("Nombre");
genero = i.getStringExtra("Genero");
etNombre.setHint(nombre);
etGenero.setHint(genero);
btConfirmar.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AmigosSQLiteHelper amigosdbh = new AmigosSQLiteHelper(VistaAmigo.this, "DBAmigos", null, 1);
SQLiteDatabase db = amigosdbh.getWritableDatabase();
ContentValues valores = new ContentValues();
valores.put("nombre", etNombre.getText().toString());
valores.put("genero", etGenero.getText().toString());
db.update("Amigos", valores, "id_amigo="+id, null);
Toast.makeText(VistaAmigo.this.getBaseContext(),"Nombre: "+etNombre.getText().toString()+" Genero: "+etGenero.getText().toString()+
"Cambios realizados",Toast.LENGTH_LONG);
}
});
}
}
gridView's layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/fondogamecohol">
<GridView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/gvAmigos"
android:layout_gravity="center_horizontal"
android:numColumns="auto_fit"
android:layout_margin="10dp"
android:verticalSpacing="20dp"
android:horizontalSpacing="20dp" />
</LinearLayout>
Gridview's item layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/rounded_corners_white"
android:id="#+id/lyItemAmigo">
<ImageView
android:layout_width="124dp"
android:layout_height="95dp"
android:id="#+id/ivFotoAmigo"
android:background="#d8d8d8"
android:layout_marginTop="10dp"
android:layout_marginLeft="12dp"
android:layout_marginRight="12dp"
android:clickable="false"
android:src="#drawable/ic_tag_faces_white_36dp" />
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="Chrisitan"
android:id="#+id/tvNombreAmigo"
android:layout_gravity="center"
android:textColor="#333333"
android:textStyle="bold"
android:textSize="18dp"
android:layout_marginTop="5dp"
android:layout_marginRight="12dp"
android:clickable="false"
android:layout_marginLeft="14dp" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:gravity="right"
android:id="#+id/lyBotonesAmigo"
android:layout_marginTop="5dp"
android:layout_marginRight="12dp">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btEditarAmigo"
android:clickable="false"
android:background="#drawable/ic_edit_black_18dp" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btEliminarAmigo"
android:clickable="false"
android:background="#drawable/ic_delete_forever_black_18dp" />
</LinearLayout>
</LinearLayout>
PopUp window layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:theme="#style/PopUp1">
<LinearLayout
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:background="#drawable/rounded_corners_white"
android:orientation="vertical">
<TextView
android:layout_width="fill_parent"
android:layout_height="40dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Modificar amigo"
android:id="#+id/tvModificarAmigo"
android:layout_gravity="center_horizontal"
android:background="#c9ed5a"
android:gravity="center_vertical|center_horizontal"
android:textStyle="bold"
android:textColor="#ffffff" />
<RelativeLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Nombre: "
android:id="#+id/tvNombreVistaAmigo"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_marginStart="28dp"
android:layout_marginTop="51dp"
android:textStyle="bold"
android:textColor="#333333"
android:textSize="20dp" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/etNombreVistaAmigo"
android:layout_marginStart="10dp"
android:hint="Jugador 1"
android:textColorHint="#333333"
android:textColor="#333333"
android:textStyle="bold"
android:layout_alignParentTop="true"
android:layout_toEndOf="#+id/tvNombreVistaAmigo"
android:layout_toRightOf="#+id/tvNombreVistaAmigo"
android:layout_marginTop="41dp"
android:textSize="20dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Genero:"
android:id="#+id/tvGeneroVistaAmigo"
android:layout_centerVertical="true"
android:layout_alignStart="#+id/tvNombreVistaAmigo"
android:textColor="#333333"
android:textStyle="bold" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/etGeneroVistaAmigo"
android:hint="Hombre"
android:textColorHint="#333333"
android:textColor="#333333"
android:textStyle="bold"
android:layout_alignStart="#+id/etNombreVistaAmigo"
android:layout_below="#+id/etNombreVistaAmigo"
android:layout_marginTop="23dp"
android:textSize="20dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Confirmar"
android:id="#+id/btConfirmarAmigo"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="#drawable/rounded_corners_green"
android:layout_marginBottom="20dp"
android:textStyle="bold"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:textSize="20dp" />
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
From what I´ve seen in your code is, that you try to get the id from an intent in your PopUp window class. You have made one thing wrong:
Intent i = getIntent();
i.getIntExtra("Id", id);
it must be:
Intent i = getIntent();
id = i.getIntExtra("Id", id); //forgott id = here
and you should give a default value to id for example id=-1 . The problem is, by updating your database, you give a non value integer and so it is not possible to update your table.
This is my code below
1) This is Class with getter and setter methods + extension of base adapter
package virtual.mall;
import java.util.List;
import virtual.mall.Salt_page_ada.saltlist_holder;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
class Order1_cls {
String o1_it_name,o1_it_count;
int o1_it_cost,o1_it_qty;
Boolean o1isselect=false;
public Order1_cls(String o1_it_name,String o1_it_count,int o1_it_qty,int o1_it_cost){
super();
this.o1_it_name = o1_it_name;
this.o1_it_count=o1_it_count;
this.o1_it_qty=o1_it_qty;
this.o1_it_cost = o1_it_cost;
this.o1isselect=o1isselect;
}
public String getO1_it_name() {
return o1_it_name;
}
public void setO1_it_name(String o1_it_name) {
this.o1_it_name = o1_it_name;
}
public String getO1_it_count() {
return o1_it_count;
}
public void setO1_it_count(String o1_it_count) {
this.o1_it_count = o1_it_count;
}
public int getO1_it_cost() {
return o1_it_cost;
}
public void setO1_it_cost(int o1_it_cost) {
this.o1_it_cost = o1_it_cost;
}
public int getO1_it_qty() {
return o1_it_qty;
}
public void setO1_it_qty(int o1_it_qty) {
this.o1_it_qty = o1_it_qty;
}
public Boolean getO1isselect() {
return o1isselect;
}
public void setO1isselect(Boolean o1isselect) {
this.o1isselect = o1isselect;
}
}
public class Order1_page extends ArrayAdapter<Order1_cls> {
private List <Order1_cls> order1list;
private Context context;
public Order1_page(List<Order1_cls> order1list, Context context) {
super(context, R.layout.order1listref,order1list);
this.order1list=order1list;
this.context=context;
}
public static class Order1list_holder{
public TextView o1_name;
public TextView o1_count;
public TextView o1_qty;
public TextView o1_cost;
public CheckBox o1chkbx;
}
public View getView(int pos,View con_view,ViewGroup parent){
View v=con_view;
Order1list_holder hold=new Order1list_holder();
if(con_view==null){
LayoutInflater inflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v=inflater.inflate(R.layout.order1listref,null);
hold.o1_name=(TextView)v.findViewById(R.id.o1_tv_name);
hold.o1_count=(TextView)v.findViewById(R.id.o1_tv_count);
hold.o1_qty=(TextView)v.findViewById(R.id.o1_tv_qty);
hold.o1_cost=(TextView)v.findViewById(R.id.o1_tv_cost);
hold.o1chkbx=(CheckBox)v.findViewById(R.id.o1_cBox);
hold.o1chkbx.setOnCheckedChangeListener((Order1class) context);
}
else{
hold=(Order1list_holder)v.getTag();
}
Order1_cls o1= order1list.get(pos);
//hold.o1_name.setText(o1.getO1_it_name());
hold.o1_count.setText(o1.getO1_it_count());
hold.o1_qty.setText(" "+o1.getO1_it_qty());
hold.o1_cost.setText(" " + o1.getO1_it_cost());
hold.o1chkbx.setChecked(o1.o1isselect);
hold.o1chkbx.setTag(o1);
return v;
}
}
2) This is code for main class extending the activity with handlers
i have written the code for deletion below but it shows an exceptio
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.SparseBooleanArray;
import android.view.View;
import android.widget.CompoundButton;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.Toast;
public class Order1class extends Activity implements android.widget.CompoundButton.OnCheckedChangeListener {
ListView lv;
ArrayList<Order1_cls> order1list; //class name in ref java file
Order1_page o1adapter; // ref xml name
ArrayList<Integer> positionslist;
ImageButton addc,delbtn;
protected Object posi;
final Context context = this;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.order1pageclass);
positionslist=new ArrayList<Integer>();
lv=(ListView)findViewById(R.id.order1class_listv); //listview id in main layout
disp_ord1list();
}
private void disp_ord1list() {
// TODO Auto-generated method stub
order1list =new ArrayList<Order1_cls>();
order1list.add(new Order1_cls("Rice(basmati)","1kg packet",3,450));
order1list.add(new Order1_cls("Lentils(finegrade)","2kg packet",2,500));
order1list.add(new Order1_cls("Colgate","5kg packet",3,60));
order1list.add(new Order1_cls("cereal","1kg packet",3,60));
order1list.add(new Order1_cls("surfexcel","2kg packet",2,40));
order1list.add(new Order1_cls("vim","200gms Bar",1,25));
order1list.add(new Order1_cls("Flour","5kg packet",1,300));
o1adapter=new Order1_page(order1list,this);
lv.setAdapter(o1adapter);
}
#Override
public void onCheckedChanged(CompoundButton but_view, boolean o1isselected) {
// TODO Auto-generated method stub
int posi=lv.getPositionForView(but_view);
if(posi !=ListView.INVALID_POSITION){
Order1_cls o1=order1list.get(posi);
o1.setO1isselect(o1isselected);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
// set title
alertDialogBuilder.setTitle("remove item ??");
// set dialog message
alertDialogBuilder
.setMessage("Click yes to delete")
.setCancelable(false)
.setPositiveButton("Delete",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
for(int position : positionslist){
order1list.remove(position);
} o1adapter.notifyDataSetChanged();
}
})
.setNegativeButton("add",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
// Toast.makeText(this,"CLICKED ON " + o1.getO1_it_name()+"of count "+ o1.getO1_it_count()+"cost is "+o1.getO1_it_cost(),Toast.LENGTH_SHORT).show();
}
}
3) order1pageclass.xml file for actual page layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#58ACFA"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Order-1 27/3/15"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="25dp" />
</LinearLayout>
<ListView
android:id="#+id/order1class_listv"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_above="#+id/lay1"
android:layout_alignParentLeft="true"
android:layout_below="#+id/linearLayout1"
android:background="#FAFAFA" >
</ListView>
<LinearLayout
android:id="#+id/lay1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:background="#58ACFA"
android:orientation="horizontal" >
<ImageButton
android:id="#+id/imageButton3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/menu_btn"
android:background="#58ACFA" />
<ImageButton
android:id="#+id/imageButton4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.65"
android:src="#drawable/home_btn"
android:background="#58ACFA"
/>
<ImageButton
android:id="#+id/imageButton5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/cart_btn"
android:background="#58ACFA" />
</LinearLayout>
</RelativeLayout>
4) reference page layout (how each row should look or what it must have )
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/o1_tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_margin="5dp"
android:text="Rice(Basmati)"
android:textAppearance="?android:attr/textAppearanceLarge" />
<CheckBox
android:id="#+id/o1_cBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_margin="5dp"
android:layout_marginRight="36dp"
android:text="+ Cart" />
<TextView
android:id="#+id/o1_tv_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/o1_tv_name"
android:layout_below="#+id/o1_tv_name"
android:layout_margin="5dp"
android:text="5kg Pack"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="20dp" />
<TextView
android:id="#+id/o1_tv_qty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/o1_tv_count"
android:layout_alignBottom="#+id/o1_tv_count"
android:layout_margin="5dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="28dp"
android:layout_toLeftOf="#+id/o1_cBox"
android:text="3"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="20dp" />
<TextView
android:id="#+id/tvqty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/o1_tv_qty"
android:layout_alignBottom="#+id/o1_tv_qty"
android:layout_margin="5dp"
android:layout_marginLeft="10dp"
android:layout_toRightOf="#+id/o1_tv_name"
android:text="Qty :"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="20dp" />
<TextView
android:id="#+id/o1_tv_cost"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/o1_tv_qty"
android:layout_alignBottom="#+id/o1_tv_qty"
android:layout_alignRight="#+id/o1_cBox"
android:layout_margin="5dp"
android:text="450 "
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="20dp" />
</RelativeLayout>
In your onCheckedChanged() method save the positions in a list. and when button is clicked iterate through the list and delete them from the adapter list.
I have activities
1> mainactivity
which creates SQLite table and add stores data from edittext to mysql table
2> viewdatabse activity
which retrieves data from SQLite table and displayes in listview.
the problem is The same DATA is shown multiple time.
ex.
if i write something in edittext1 the listview will show only data of edittext1 multiple time.
here is the code of mainactivity
package com.example.androiddatabase;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
EditText name,password,date,other;
Button save,show;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
name=(EditText)findViewById(R.id.nametext);
password=(EditText)findViewById(R.id.password);
date=(EditText)findViewById(R.id.time);
other=(EditText)findViewById(R.id.other);
save=(Button)findViewById(R.id.button1);
show=(Button)findViewById(R.id.button2);
save.setOnClickListener(this);
show.setOnClickListener(this);
SQLiteDatabase db=null;
try{
db=openOrCreateDatabase("MyIds",MODE_PRIVATE , null);
db.execSQL("create table if not exists MyInfo(names VARCHAR(30),passwords VARCHAR(10),dates INTEGER,others VARCHAR(500))");
}
catch(Exception e){
Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
}
finally{
if(db.isOpen()){
db.close();
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v==save)
{
String n= name.getText().toString();
String p= password.getText().toString();
String d= date.getText().toString();
String o =other.getText().toString();
SQLiteDatabase db=null;
try{
db=openOrCreateDatabase("MyIds", MODE_PRIVATE, null);
db.execSQL("insert into MyInfo(names,passwords,dates,others)values('"+n+"','"+p+"','"+d+"','"+o+"')");
}
catch(Exception e)
{
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
finally
{
if(db.isOpen())
{
db.close();
}
}
}
else if (v==show)
{
Intent i = new Intent(this, viewdatabse.class);
startActivity(i);
}
}
}
here is the another activity which represens the listview which show data from mysql
package com.example.androiddatabase;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class viewdatabse extends Activity{
ListView lv;
ArrayList<HashMap<String, String>> aa;
String name,password,date,other;
HashMap<String, String> hh;
String n,p,d,o;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.listdatabse);
lv=(ListView)findViewById(R.id.listView1);
aa = new ArrayList<HashMap<String,String>>();
SQLiteDatabase db=null;
try{
db=openOrCreateDatabase("MyIds",MODE_PRIVATE , null);
Cursor c = db.rawQuery("select * from MyInfo", null);
while(c.moveToNext())
{
hh= new HashMap<String, String>();
name=c.getString(c.getColumnIndex("names"));
hh.put(n, name);
password=c.getString(c.getColumnIndex("passwords"));
hh.put(p, password);
date=c.getString(c.getColumnIndex("dates"));
hh.put(d, date);
other=c.getString(c.getColumnIndex("others"));
hh.put(o, other);
aa.add(hh);
}
}
catch(Exception e){
Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
}
finally{
if(db.isOpen()){
db.close();
}
}
String s[]={n,p,d,o};
int i[]={R.id.textView1,R.id.textView2,R.id.textView3,R.id.textView4};
SimpleAdapter sa = new SimpleAdapter(this, aa, R.layout.customlist, s, i);
lv.setAdapter(sa);
}
}
here is the mainactivity xml file which has 4 edittext to take user input
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<EditText
android:id="#+id/nametext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName">
<requestFocus />
</EditText>
<EditText
android:id="#+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword" />
<EditText
android:id="#+id/time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="time" />
<EditText
android:id="#+id/other"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" >
</EditText>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="save" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="show" />
</LinearLayout>
here is xml for view database activity which has listview to show data.
<?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" >
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
here is the xml to create custom listview which is directly used in simpleadapter
<?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/textView1"
android:textSize="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView2"
android:textSize="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
I am trying to build a simple app for a school assignment. When the user clicks on the image button a new view opens up with a picture of the image.However whenever a user clicks on the image in my application the it stops. The logcat error says says at android view.view.onclick, but I can't see where the mistake is. Thanks in advance.
main_activity.java
package com.example.kids;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ImageButton;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void apple(ImageButton buttona){
Intent intent = new Intent(this, Apple.class);
startActivity(intent);
}
public void banana(ImageButton buttonb){
Intent intent = new Intent(this, Banana.class);
startActivity(intent);}
public void strawberry(ImageButton buttons){
Intent intent = new Intent(this, Strawberry.class);
startActivity(intent);
}}
Apple.java
package com.example.kids;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class Apple extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_apple);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.apple, menu);
return true;
}
}
Activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="100"
android:orientation="vertical" >
<TextView
android:id="#+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="9.93"
android:text="Pick a fruit"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="30"
android:src="#drawable/applebudget"
android:onClick="apple"
/>
<ImageView
android:id="#+id/imageView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="30"
android:src="#drawable/bananabudget"
android:onClick="banana"
/>
<ImageView
android:id="#+id/imageView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="30"
android:src="#drawable/strawberrybudget"
android:onClick="strawberry"
/>
</LinearLayout>
Change the method signatures of onClick() methods:
public void apple(View buttona){}
public void banana(View buttonb){}
public void strawberry(View buttons){}
And you are done.
I just want to know if this is possible since first. I have created a custom listView based on the tutorial I read from Sai Geetha. Well it works perfectly on my app except that it needs to extend ListActivity instead of FragmentActivity. Now I'm having a hard time configuring and adding a dialog for this since I need to apply a fragment dialog and I can't use the getFragmentManager() since I'm not working with the FragmentActivity. Is there's another way I can do to work on this without sacrificing the ListActivity? Thanks!
Here's my code so far
XML:
conversation_list_view
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#id/android:list"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginBottom="5dp"
android:layout_marginTop="20dp"/>
</LinearLayout>
group_screen
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="48dp"
android:background="#drawable/action_bar_separator"
android:id="#+id/relativeLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Group Name"
android:id="#+id/txt_group_name"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:textColor="#color/dark_gray"
android:shadowColor="#color/dark_shadow"
android:shadowRadius="1"
android:shadowDy="1"/>
<Button
android:layout_width="32dp"
android:layout_height="32dp"
android:id="#+id/btn_back"
android:background="#drawable/btn_navigate_back"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"/>
<Button
android:layout_width="32dp"
android:layout_height="32dp"
android:id="#+id/btn_information"
android:background="#drawable/btn_information"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_marginTop="10dp"
android:layout_marginRight="10dp"/>
</RelativeLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Conversations"
android:id="#+id/textView2"
android:textColor="#color/holo_light_blue"
android:layout_marginLeft="15dp"
android:layout_marginTop="10dp"/>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="340dp"
>
<fragment
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:name="com.mark.exercise.ListViewFragment"
android:id="#+id/fragment"/>
</LinearLayout>
<Button
android:layout_width="match_parent"
android:layout_height="42dp"
android:text="Ask something"
android:id="#+id/btn_ask_question"
android:layout_marginRight="10dp"
android:layout_marginLeft="10dp"
android:textSize="15dp"/>
</LinearLayout>
</LinearLayout>
Java
package com.mark.exercise;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
/**
* Created by pc on 9/24/13.
*/
public class GroupActivity extends FragmentActivity {
Button information, back, new_topic;
ListView conversations;
TextView group_name;
String name, group_description, group_administrator,image_id;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.group_screen);
Intent intent = getIntent();
name = intent.getStringExtra("group_name");
group_description = intent.getStringExtra("group_description");
group_administrator = intent.getStringExtra("group_administrator");
image_id = intent.getStringExtra("image_id");
information = (Button)findViewById(R.id.btn_information);
back = (Button)findViewById(R.id.btn_back);
new_topic = (Button)findViewById(R.id.btn_ask_question);
group_name = (TextView)findViewById(R.id.txt_group_name);
group_name.setText(name);
information.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(GroupActivity.this, GroupInformationActivity.class);
intent.putExtra("group_name",name);
intent.putExtra("group_description",group_description);
intent.putExtra("group_administrator",group_administrator);
intent.putExtra("image_id",image_id);
startActivity(intent);
GroupActivity.this.overridePendingTransition(R.anim.in_from_left, R.anim.out_to_right);
}
});
new_topic.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showCreateNewTopicDialog();
}
});
back.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
onBackPressed();
}
});
}
private void showCreateNewTopicDialog() {
FragmentManager fm = getSupportFragmentManager();
DialogFragmentCreateGroup createGroup = new DialogFragmentCreateGroup();
createGroup.show(fm, "create_group");
}
#Override
public void onBackPressed(){
super.onBackPressed();
overridePendingTransition(R.anim.in_from_right,R.anim.out_to_left);
}
}
List Fragment
package com.mark.exercise;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Random;
/**
* Created by pc on 9/27/13.
*/
public class ListViewFragment extends ListFragment {
final ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.conversations_list_view,
container, false);
setListView set_list = new setListView();
set_list.start();
return view;
}
public void onListItemClick(ListView l, View v, int position, long id) {
//super.onListItemClick(l, v, position, id);
Intent intent = new Intent(getActivity(), ConversationActivity.class);
startActivity(intent);
getActivity().overridePendingTransition(R.anim.in_from_left, R.anim.out_to_right);
}
private class setListView extends Thread {
public void run() {
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
setConversations();
}
});
}
}
private void setConversations(){
list.clear();
SimpleAdapter adapter = new SimpleAdapter(
getActivity(),
list,
R.layout.custom_list_main_conversations,
new String[] {"message","date", "reply_count", "stars_count"},
new int[] {R.id.txt_conversation_message,R.id.txt_topic_date, R.id.txt_no_of_reply, R.id.txt_no_of_stars}
);
for(int ctr=0;ctr<=5;ctr++){
Random randomGenerator = new Random();
HashMap<String,String> item_list = new HashMap<String,String>();
item_list.put("message", "This is the conversation number "+(ctr+1)+" and this topic is just a dummy data.");
item_list.put("date", "0"+(ctr+1)+"/0"+(ctr+2)+"/2013 "+(ctr+1)+":00:am");
item_list.put("reply_count", String.valueOf(ctr+randomGenerator.nextInt(10)));
item_list.put("stars_count", String.valueOf(ctr+randomGenerator.nextInt(10)));
list.add(item_list);
}
android.app.ListFragment lf = new android.app.ListFragment();
lf.setListAdapter(adapter);
}
}
You can use ListFragment inside FragmentActivity instead of using a ListActivity.