Fragment with ListView: NullPointerException on setAdapter

Fragment with ListView: NullPointerException on setAdapter - android

I have the Problem, that I get a NullPointExeption when I want to set a adapter on my ListView.
Before I had the Fragment extended with ListFragment and a simple Adapter, that works but the problem was, that I have 3 Fragments in this activity all with ListViews and I got display errors (shows the wrong list in a fragment). So I decided to set for every Fragment own ids on the Listview but now it doesnt work.
Error listview.setAdapter(adapter):
java.lang.NullPointerException at
de.resper.e2cast.MainFragmentLive.onCreateView(MainFragmentLive.java:46)
Fragment:
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
import de.resper.e2cast.classes.globalBox;
import de.resper.e2cast.helper.getXml;
import de.resper.e2cast.helper.parseXml;
public class MainFragmentLive extends android.support.v4.app.Fragment {
private List<String> bouquetListString;
private ArrayAdapter<String> adapter;
private globalBox activeBox;
private ListView listview;
#Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main_live, container, false);
activeBox = ((globalBox) getActivity().getApplicationContext());
bouquetListString = new ArrayList<String>();
bouquetListString.add("loading...");
if(activeBox.isInit()){
if(activeBox.getBouquets().size() > 0 && activeBox.getBouquets().get(2).size() > 0){
bouquetListString = activeBox.getBouquets().get(2);
}else{
Log.d("Load Bouquet", "XML");
getBouquetBox();
}
}
listview = (ListView) getActivity().findViewById(R.id.listLive);
adapter = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1, bouquetListString);
listview.setAdapter(adapter);
ImageButton reloadBouquet = (ImageButton) view.findViewById(R.id.reloadBouquet);
reloadBouquet.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View arg0) {
getBouquetBox();
}
});
setHasOptionsMenu(true);
return view;
}
public void getBouquetBox(){
getXml.DownloadCompleteListener dcl = new getXml.DownloadCompleteListener() {
#Override
public void onDownloadComplete(String result) {
bouquetListString.clear();
String [] tags = {"e2servicereference", "e2servicename"};
List<List<String>> bouquetsList = parseXml.parseXmlByTag(result, tags);
activeBox.addBouquets(bouquetsList);
bouquetListString.addAll(activeBox.getBouquets().get(2));
adapter.notifyDataSetChanged();
}
};
Log.d("MyLogger", "XML Request GET BOUQUET");
getXml downloader = new getXml(dcl);
downloader.execute("http://" + activeBox.getIpPort() + "/web/getservices");
}
}
Fragment XML:
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_margin="8dp">
<TextView
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="0.8"
android:text="#string/selectBouquet"
style="#style/header1"/>
<ImageButton
android:layout_width="0dip"
android:layout_height="wrap_content"
android:id="#+id/reloadBouquet"
android:src="#drawable/ic_action_refresh"
android:contentDescription="#string/search"
android:layout_weight=".20"
android:layout_gravity="bottom"/>
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:background="#android:color/darker_gray"/>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/listLive" />
</LinearLayout>

Use view instead of getActivity() to initializing ListView because ListView is inside Fragment layout instead of Activity :
listview = (ListView) view.findViewById(R.id.listLive);

Related

Adding Search Box in Custom List

I want to add search box action in Main activity and List data activity,but I'm having trouble with getting filter() and other things,Please suggest me the ode.
package com.souravapplication.fruit;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
SearchView editsearch;
ListView listView;
String[] fruitNames = {"Apple","Oranges","Kiwi","Passion","Banana"};
int[] fruitImages = {R.drawable.apple,R.drawable.oranges,R.drawable.kiwi,R.drawable.passion,R.drawable.banana};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.listview);
final CustomAdapter customAdapter = new CustomAdapter();
listView.setAdapter(customAdapter);
editsearch = findViewById(R.id.search);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(final AdapterView adapterView, View view, int i, long l) {
Toast.makeText(getApplicationContext(),fruitNames[i],Toast.LENGTH_LONG).show();
Intent intent = new Intent(getApplicationContext(),Listdata.class);
intent.putExtra("name",fruitNames[i]);
intent.putExtra("image",fruitImages[i]);
startActivity(intent);
}
});
}
private class CustomAdapter extends BaseAdapter {
#Override
public int getCount() {
return fruitImages.length;
}
#Override
public Object getItem(int i) {
return null;
}
#Override
public long getItemId(int i) {
return 0;
}
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
View view1 = getLayoutInflater().inflate(R.layout.row_data, null);
//getting view in row_data
TextView name = view1.findViewById(R.id.fruits);
ImageView image = view1.findViewById(R.id.images);
name.setText(fruitNames[i]);
image.setImageResource(fruitImages[i]);
return view1;
}
}
}
My List Data Activity class.
package com.souravapplication.fruits;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.TextView;
public class Listdata extends AppCompatActivity {
TextView listdata;
ImageView imageView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_listdata);
listdata = findViewById(R.id.listdata);
imageView = findViewById(R.id.imageView);
Intent intent = getIntent();
String receivedName = intent.getStringExtra("name");
int receivedImage = intent.getIntExtra("image",0);
listdata.setText(receivedName);
imageView.setImageResource(receivedImage);
//enable back Button
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
onBackPressed();
}
return super.onOptionsItemSelected(item);
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
}
I have defined the SearchBox in android XML and it's working, the only problem is putting action in the search box.
My activity_main.xml file
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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">
<SearchView
android:id="#+id/search"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:iconifiedByDefault="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent">
</SearchView>
<ListView
android:id="#+id/listview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
app:layout_constraintEnd_toEndOf="parent"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteY="-699dp">
</ListView>
</android.support.constraint.ConstraintLayout>
My row_data.xml
<?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">
<RelativeLayout
android:id="#+id/listviewdata"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
>
<TextView
android:id="#+id/fruits"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginEnd="44dp"
android:layout_marginRight="44dp"
android:layout_toStartOf="#+id/images"
android:layout_toLeftOf="#+id/images"
android:text="Apple"
android:textColor="#000"
android:textSize="35sp"
/>
<ImageView
android:id="#+id/images"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginEnd="27dp"
android:layout_marginRight="27dp"
android:src="#drawable/apple"/>
</RelativeLayout>

ListView onClick insied DialogFragment doesnt work

I have a list view inside a DialogFragment and onClick for the list item doesnt work. Dont know where Im going wrong here. Implemented onItemClick but no use. Code below.
DialogFragment
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class DFragment extends DialogFragment {
ListView mylist;
ArrayList dateitems ;
ArrayList descitems ;
ArrayList locationitems ;
ArrayList listitems ;
public void setList(ArrayList list){
listitems = list;
}
public void setDateList(ArrayList list){
dateitems = list;
}
public void setLocList(ArrayList list){
locationitems = list;
}
public void setDescList(ArrayList list){
descitems = list;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.popup_content, container,
false);
mylist = (ListView) rootView.findViewById(R.id.poplist);
TextView title = (TextView) rootView.findViewById(R.id.dialog_title);
title.setText("Today's Events");
getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
mylist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(getActivity(), SupportEventActivity.class);
intent.putExtra("rvEventTitle", listitems.get(position).toString());
intent.putExtra("rvEventDescription", descitems.get(position).toString());
intent.putExtra("rvEventLocation", locationitems.get(position).toString());
intent.putExtra("rvEventTimestamp", dateitems.get(position).toString());
}
});
// Do something else
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
R.layout.popup_content_row, R.id.poprow_text, listitems);
mylist.setAdapter(adapter); }
Layout file. popup_content.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="wrap_content"
android:orientation="vertical"
android:background="#drawable/back"
>
<TextView
android:id="#+id/dialog_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="25dp"/>
<ListView
android:id="#+id/poplist"
android:layout_width="wrap_content"
android:layout_height="200dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:divider="#8F8F8F"
android:dividerHeight="2px"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" /> </LinearLayout>

You didn't add startActivity(intent) to your OnClickListener.

Trouble setting a ListView / DialogFragment to full screen

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="15dp"
android:padding="10dp"
android:src="#drawable/arteta"/>
<TextView
android:id="#+id/nameTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="27dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="#id/imageView1"
android:text="name"/>
</RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:layout_width="150dp"
android:layout_height="100dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="15dp"
android:padding="10dp"
android:id="#+id/imageView1"
android:src="#drawable/arteta"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="27dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="#+id/imageView1"
android:text="Name"
android:id="#+id/nameTv" />
</RelativeLayout>
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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show"
android:id="#+id/button1"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:onClick="setContentView" />
</RelativeLayout>
I have made a ListView with a DialogFragment and I am trying to display this in full screen.
However, when I run it on a device, there is always a border around the edges of the ListView, like a box within a box and cant seem to set it to fill the screen!
I have tried many routes to make this ListView cover the entire screen to no avail.
I would really like and appreciate some help with this.
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"
android:orientation="vertical">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/listView1"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
></ListView>
</RelativeLayout>
MainActivity
import android.support.v4.app.FragmentActivity;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.app.FragmentManager;
public class MainActivity extends FragmentActivity {
Button showBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
final PlayersFragment p = new PlayersFragment();
showBtn = (Button) findViewById(R.id.button1);
showBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
p.show(fm, "Players Fragment");
}
});
}
}
PlayersFragment
import android.app.DialogFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
public class PlayersFragment extends android.support.v4.app.DialogFragment {
ListView lv;
String[] players = {"micheal arteta", "deago costa", "andy reid", "scum degea", "scum rooney", "john terry"};
int[] images = {R.drawable.arteta, R.drawable.costa, R.drawable.reid, R.drawable.degea,
R.drawable.rooney, R.drawable.terry};
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.dialog, container, false);
//initialize listview
lv = (ListView) rootView.findViewById(R.id.listView1);
//set dialog title
getDialog().setTitle("Soccer SuperStars");
//create adapter obj and set list view to it
Adapter adapter = new Adapter(getActivity(), players);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int pos, long id) {
Toast.makeText(getActivity(), players[pos], Toast.LENGTH_SHORT).show();
}
});
return rootView;
}
}
Adapter
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class Adapter extends ArrayAdapter<String>{
Context c;
String[] players;
int[] images;
LayoutInflater inflater;
public Adapter(Context context, String[] players) {
super(context, R.layout.rowmodel,players);
this.c=context;
this.players = players;
this.images = images;
}
#Override
public View getView(int position,View convertView, ViewGroup parent){
if(convertView==null)
{
inflater= (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.rowmodel,null);
}
TextView nameTv = (TextView) convertView.findViewById(R.id.nameTv);
ImageView img = (ImageView) convertView.findViewById(R.id.imageView1);
nameTv.setText(players[position]);
img.setImageResource(images[position]);
return convertView;
}
}

I think that you should use a FrameLayout in your main_activity layout. Something like this:
<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=".MainActivity">
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show"
android:id="#+id/button1"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:onClick="setContentView" />
</FrameLayout>
</RelativeLayout>
Then, in your MainActivity, try this:
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends FragmentActivity {
Button showBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
final PlayersFragment p = new PlayersFragment();
showBtn = (Button) findViewById(R.id.button1);
showBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
final FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
showBtn.setVisibility(View.GONE);
transaction.replace(R.id.fragment_container, p);
transaction.addToBackStack(null);
transaction.commit();
}
});
}
#Override
public void onBackPressed() {
if (showBtn != null) {
showBtn.setVisibility(View.VISIBLE);
}
super.onBackPressed();
}
}
Your adapter:
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class Adapter extends ArrayAdapter<String>{
Context c;
String[] players;
int[] images;
LayoutInflater inflater;
public Adapter(Context context, String[] players, int[] images) {
super(context, R.layout.simplerow,players);
this.c=context;
this.players = players;
this.images = images;
}
#Override
public View getView(int position,View convertView, ViewGroup parent){
if(convertView==null)
{
inflater= (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.simplerow,null);
}
TextView nameTv = (TextView) convertView.findViewById(R.id.nameTv);
ImageView img = (ImageView) convertView.findViewById(R.id.imageView1);
nameTv.setText(players[position]);
img.setImageResource(images[position]);
return convertView;
}
}
Your dialog 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">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Soccer SuperStars"
android:layout_gravity="center"/>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#android:color/black"/>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/listView1"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
></ListView>
</LinearLayout>
And your PlayerFragment:
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
public class PlayersFragment extends android.support.v4.app.DialogFragment {
ListView lv;
String[] players = {"micheal arteta", "deago costa", "andy reid", "scum degea", "scum rooney", "john terry"};
int[] images = {R.drawable.arteta, R.drawable.costa, R.drawable.reid, R.drawable.degea,
R.drawable.rooney, R.drawable.terry};
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.dialog, container, false);
//initialize listview
lv = (ListView) rootView.findViewById(R.id.listView1);
//create adapter obj and set list view to it
Adapter adapter = new Adapter(getActivity(), players, images);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int pos, long id) {
Toast.makeText(getActivity(), players[pos], Toast.LENGTH_SHORT).show();
}
});
return rootView;
}
}
I removed some come (paddings) from your main_activity layout and included some code show the "dialog" (that is now a fragment) full screen.

1) First method
public class PlayersFragment extends DialogFragment {
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setStyle(DialogFragment.STYLE_NO_TITLE, android.R.style.Theme_NoTitleBar_Fullscreen);
}
}
2) Second method
public class PlayersFragment extends DialogFragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setStyle(DialogFragment.STYLE_NO_TITLE, R.style.myCustomStyle);
}
}
in values add style
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppBaseTheme" parent="Theme.AppCompat.Light.NoActionBar">
</style>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
</style>
<style name="GalleryDialogStyle" parent="AppTheme">
<item name="android:windowActionBar">false</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowContentOverlay">#null</item>
</style>
</resources>

Button Click inside list ListView

i tried many reference to this,but didn't get it working.
I have a simplecursoradapter with listview .
I populate textview and a button in each listitem.
I need to perform 2 operations:
1.Button Click
2.Listview Click.
Using onListItemClick my code is running perfect.but i cannot access the button inide the listview to perform(a call).
My code below:
<?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">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="#+id/btn_call"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:layout_gravity="center_vertical"/>
<TextView
android:id="#+id/jobnumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:textStyle="bold"
android:textColor="#000000"
android:layout_marginRight="50dp"
android:height="30sp"
android:gravity="right" />
<TextView
android:id="#+id/complaintdate"
android:layout_width="257dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/jobnumber"
android:gravity="right" />
</RelativeLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center_horizontal"
>
<TextView
android:id="#+id/lbltenantname"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:text="#string/Tenant">
</TextView>
<TextView
android:id="#+id/tenantname"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical|center_horizontal">
</TextView>
</LinearLayout>
and other textviews....
list to hold the Listitem...
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/backgroundn"
android:descendantFocusability="blocksDescendants">
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:divider="#000000"
android:dividerHeight="4dp"/>
</LinearLayout>
and my android code
import android.app.ActionBar;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class JobList extends ListActivity
{
SimpleCursorAdapter mAdapter;
ListView lv;
private DatabaseAdapter dbHelper;
Menu menuitem;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.joblist_item);
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
Intent intent=getIntent();
String BegeningUserid= intent.getStringExtra("USERID");
String SelfStatus= intent.getStringExtra("SELF");
Button call=(Button)findViewById(R.id.btn_call);
try
{
dbHelper=new DatabaseAdapter(this);
dbHelper.open();
lv=(ListView)findViewById(android.R.id.list);
Cursor c=dbHelper.fetchAllJobs(BegeningUserid,SelfStatus);
#SuppressWarnings("static-access")
String[] from = new String[] { dbHelper.COL_JOBNUMBER,dbHelper.COL_TENANT ,dbHelper.COL_DEVELOPMENT,dbHelper.COL_SHORTCODE,dbHelper.COL_PROPERTY,dbHelper.COL_COMPLAINTDATE,dbHelper.COL_COMPLAINTDESC,dbHelper.COL_MOBILE};
int[] to = new int[] {R.id.jobnumber, R.id.tenantname, R.id.location,R.id.ShortCode, R.id.Unit,R.id.complaintdate,R.id.complaintdesc,R.id.mobile};
#SuppressWarnings("deprecation")
SimpleCursorAdapter adapter = new SimpleCursorAdapter(
JobList.this, R.layout.list_item, c, from, to);
adapter.notifyDataSetChanged();
lv.setAdapter(adapter);
if(lv.getCount()<=0)
{
Toast.makeText(getApplicationContext(), "NO JOBS ASSIGNED", Toast.LENGTH_LONG).show();
}
lv.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
Toast.makeText(getApplicationContext(), "Clicked",Toast.LENGTH_SHORT).show();
}
});
}
catch(Exception e)
{
System.out.println(e);
}
finally
{
dbHelper.close();
}
}
my listitemclick which is working perfect
public void onListItemClick(ListView parent, View view, int position, long id)
{
}
all i need is click button inside the listview and perform another activity depending on the data from the particular listview position.

set this custom Adapter to your list view...
Custom Adapter Class
public class CustomAdapter extends BaseAdapter implements OnClickListener {
//song list and layout
private ArrayList<from> from;
private LayoutInflater songInf;
//constructor
public CustomAdapter(Context c, ArrayList<from> arrfrom){
from=arrfrom;
songInf=LayoutInflater.from(c);
}
#Override
public int getCount() {
return from.size();
}
#Override
public Object getItem(int arg0) {
return null;
}
#Override
public long getItemId(int arg0) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LinearLayout songLay = (LinearLayout)songInf.inflate
(R.layout.list_item, parent, false);
TextView tv = (TextView)songLay.findViewById(R.id.from_text);
Button button = (Button)songLay.findViewById(R.id.from_button);
tv.setText(from.get(position));
button.setOnClickListner(this);
return songLay;
}
#Override
public void onClick(View v)
{
// Here is code after button click
}
}

Trouble with fragments and adapter

I'm working on a little app which is supposed to display 3 screens : Talks, Papers and Choices. I've discovered fragments a few days ago and I would like to use this feature for my app, but unfortunately, it doesn't work for a particular reason…
My fragment:
package info.androidhive.tabsswipe;
import java.io.IOException;
import java.util.List;
import be.unamur.confpers.beans.Paper;
import be.unamur.confpers.xml.XMLParser2;
import info.androidhive.tabsswipe.R;
import info.androidhive.tabsswipe.adapter.PaperAdapter;
import android.app.ListFragment;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import be.unamur.confpers.beans.Paper;
import be.unamur.confpers.xml.XMLParser2;
import be.unamur.confpers.*;
public class PapersFragment extends Fragment {
private PaperAdapter listAdapter;
private Context myContext;
List<Paper> papers = null;
private List<Paper> papersParser () {
try {
XMLParser2 parser = new XMLParser2();
papers = parser.parse(getActivity().getApplicationContext().getAssets().open("talks.xml"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return papers;
};
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_papers, container, false);
ListView lv = (ListView) getActivity().findViewById(R.id.check1);
listAdapter = new PaperAdapter(getActivity(),papers);
//lv.setAdapter(listAdapter);
return v;
}
}
My adapter :
package info.androidhive.tabsswipe.adapter;
import android.content.Context;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.TextView;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import be.unamur.confpers.beans.Paper;
import info.androidhive.tabsswipe.R;
import java.util.ArrayList;
import java.util.List;
public class PaperAdapter extends BaseAdapter implements OnClickListener {
private Context context;
private List<Paper> papers;
private LayoutInflater inflater;
public PaperAdapter(Context context, List<Paper> papers) {
this.context = context;
this.papers = papers;
inflater = LayoutInflater.from(context);
}
#Override
public int getCount(){
return papers.size();
}
#Override
public Object getItem(int position) {
return papers.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View view, ViewGroup viewGroup) {
// We only create the view if its needed
if (view == null) {
view = inflater.inflate(R.layout.child_row, null);
// Set the click listener for the checkbox
view.findViewById(R.id.check1).setOnClickListener(this);
}
Paper p = (Paper) getItem(position);
// Set the example text and the state of the checkbox
CheckBox cb = (CheckBox) view.findViewById(R.id.check1);
//cb.setChecked(p.isSelected());
// We tag the data object to retrieve it on the click listener.
TextView paper = (TextView)view.findViewById(R.id.papername);
if (paper != null)
paper.setText(p.getTitle());
TextView author = (TextView)view.findViewById(R.id.authorname);
if( author!= null )
author.setText( p.getAuthor() );
return view;
}
/*#Override
/** Will be called when a checkbox has been clicked. */
public void onClick(View view) {
}
}
My XML files :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_above="#+id/buttonsave" >
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<TextView
android:id="#+id/papername"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
<Button
android:id="#+id/buttonsave"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:text="#string/btn_save" />
<Button
android:id="#+id/buttonload"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:text="#string/btn_load" />
</RelativeLayout>
Group_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="wrap_content"
android:layout_alignParentTop="true"
android:orientation="horizontal" >
<TextView
android:id="#+id/papername"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="50dp"
android:textSize="18sp"
android:textStyle="bold" />
</LinearLayout>
Child_row.xml :
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:orientation="horizontal"
android:shrinkColumns="0">
<!-- 2 columns -->
<TableRow
android:id="#+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:paddingLeft="20dp"
>
<CheckBox
android:id="#+id/check1"
android:layout_height="wrap_content"
android:layout_width="30dp"
android:focusable="false"
/>
<TextView
android:id="#+id/papername"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:textSize="16sp"
android:textStyle="normal"
android:layout_marginLeft="5dp" />
</TableRow>
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="50dp"
android:paddingBottom="15dp" >
<TextView
android:id="#+id/authorname"
android:layout_span="2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:textSize="16sp"
android:textStyle="italic"
android:layout_marginRight="5dp" />
</TableRow>
</TableLayout>
If I leave
//lv.setAdapter(listAdapter);
commented, it loads, but as soon as I uncomment it, it crashes with the following error:
12-06 11:28:05.240: E/AndroidRuntime(1362): java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.ListView
with reference to this precise line.

You make cast checkBox to ListView !
It should be like that.
ListView lv = (ListView) getActivity().findViewById(R.id.list);

I gusse here is the error in your code:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_papers, container, false);
ListView lv = (ListView) getActivity().findViewById(R.id.check1);
//Here your casting checkBox to Listview Pleas Check it out
listAdapter = new PaperAdapter(getActivity(),papers);
//lv.setAdapter(listAdapter);
return v;
}
just replace it like
ListView lv = (ListView) v.findViewById(R.id.ListviewName);

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Fragment with ListView: NullPointerException on setAdapter - android

Use view instead of getActivity() to initializing ListView because ListView is inside Fragment layout instead of Activity : listview = (ListView) view.findViewById(R.id.listLive);

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