Update custom listview from a button

Update custom listview from a button - android

I have a custom row item xml and a Activity xml which has a button, a textbox and a listview. Can anybody give me a very simple example on how this is done? I know i will need a adapter (what it extends i dont know) and update it from the button
I have tried getting the list view updated from the button with the editview text but cant get the adapter code to be hit. I am looking at base adapters now but cant help but feel this shouldn't be complicated and need so many override methods.
Activity class
public class InvitePlayers_Activity extends Activity {
ListViewAdapter emailAdapter = null;
ImageView imgView_mail;
ImageView imgView_confirm;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE); //remove title bar
setContentView(R.layout.activity_inviteplayers);
//Generate list View from ArrayList
displayListView();
}
private void displayListView() {
//assign controls
final ListView listView = (ListView) findViewById(R.id.listView_invitePlayers);
imgView_mail = (ImageView)findViewById(R.id.imgView_mail);
//Test data
ArrayList<String> inviteNew = new ArrayList<String>();
final ArrayList<ArrayList<String>> inviteList = new ArrayList<ArrayList<String>>();
emailAdapter = new ListViewAdapter(this,inviteList);
listView.setAdapter(emailAdapter);
// Assign adapter to ListView
listView.setTextFilterEnabled(true);
//Edit listeners
imgView_mail.setOnClickListener(new View.OnClickListener() {
public void onClick(View view)
{
//variables
final String enteredMail = "testListViewEntry";
final ArrayList<ArrayList<String>> inviteList = new ArrayList<ArrayList<String>>();
ArrayList<String> invite = new ArrayList<String>();
invite.add(0, enteredMail);//add first email
invite.add(1,"icon_invitestatussent.png"); //add first status icon
inviteList.add(invite);
emailAdapter.notifyDataSetChanged();
listView.setAdapter(emailAdapter);
}
});
}
}
Adapter class
public class ListViewAdapter extends BaseAdapter {
private Activity context;
ArrayList<ArrayList<String>> inviteDetails = new ArrayList<ArrayList<String>>();
public ListViewAdapter(Activity context, ArrayList<ArrayList<String>> inviteDetails ) {
this.inviteDetails = inviteDetails;
this.context = context;
}
#Override
public int getCount() {
return 0;
}
#Override
public Object getItem(int i) {
return null;
}
#Override
public long getItemId(int i) {
return 0;
}
public View getView(int position, View view, ViewGroup parent){
//Inflater
LayoutInflater inflater = context.getLayoutInflater();
//get row view
if (view == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
view = mInflater.inflate(R.layout.list_item_email, null);
}
//assign controls
final TextView textView_playerEmail = (TextView) view.findViewById(R.id.textView_playerEmail);
ImageView imgView_inviteStatus = (ImageView) view.findViewById(R.id.imgView_inviteStatus);
//Assign control values that are dynamic
textView_playerEmail.setText(inviteDetails.get(position).get(0));
imgView_inviteStatus.setImageResource(R.drawable.icon_invitestatussent);
return view;
}
public ArrayList<ArrayList<String>> addInvite(ArrayList<String> inviteDetails, ArrayList<ArrayList<String>> currentInvites)
{
currentInvites.add(inviteDetails);
return currentInvites;
}
#Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
}
Custom row xml
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp"
android:id="#+id/textView_playerEmail"
android:textColor="#color/white"
android:text="item1">
</TextView>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imgView_inviteStatus" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imgView_remove"
android:src="#drawable/btn_cancel" />
Activity layout
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="1"
android:gravity="left|center">
<ImageView
android:layout_width="45dp"
android:layout_height="34dp"
android:id="#+id/imgView_mail"
android:src="#drawable/btn_mail"
android:layout_weight="0.22"
android:padding="3dp" />
</LinearLayout>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/listView_invitePlayers"
android:layout_gravity="center_horizontal" />
</LinearLayout>
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:id="#+id/btn_confirm"
android:src="#drawable/btn_confirm"
android:clickable="false"
android:adjustViewBounds="true"
android:layout_gravity="center_horizontal"
android:padding="2dp"
android:layout_weight="1" />
</LinearLayout>

From reading the description of the question I think you need to set custom adapter to show the elements in you listview. This is how you set the custom adapter for the listview:
public class Notes_list extends BaseAdapter
{
private Context mContext;
private ArrayList<String> id;
private ArrayList<String> firstName;
private ArrayList<String> lastName;
public Notes_list(Context c, ArrayList<String> id,ArrayList<String> fname, ArrayList<String> lname)
{
this.mContext = c;
this.id = id;
this.firstName = fname;
this.lastName = lname;
}
public int getCount() {
return id.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int pos, View child, ViewGroup arg2) {
Holder mHolder;
LayoutInflater layoutInflater;
if (child == null) {
layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
child = layoutInflater.inflate(R.layout.custom_row, null);
mHolder = new Holder();
// mHolder.txt_id = (TextView) child.findViewById(R.id.txt_id);
mHolder.txt_fName = (TextView) child.findViewById(R.id.txt_fName);
mHolder.txt_lName = (TextView) child.findViewById(R.id.txt_lName);
child.setTag(mHolder);
} else
{
mHolder = (Holder) child.getTag();
}
// mHolder.txt_id.setText(id.get(pos));
mHolder.txt_fName.setText(firstName.get(pos));
mHolder.txt_lName.setText(lastName.get(pos));
return child;
}
public class Holder
{
// TextView txt_id;
TextView txt_fName;
TextView txt_lName;
}
}
now in your main activity where you have to call the list enter code like this:
private ListView userList;
private ArrayList<Employee> itemsList = new ArrayList<modelName>();
userList = (ListView) findViewById(R.id.List);
UserList disadpt = new UserList(MainActivity.this, itemsList);
userList.setAdapter(disadpt);
Hope it helps...

Related

how to hide/show Imageview on Button Click for Custom Adapter Layout

I have custom adapter for ListView. The ListView is in activity_main.xml and I have a ImageView in CustomAdapter layout which is populated with ListView using CustomAdapter.
My Question is I have to hide/show that image which is in custom layout with a button present in main layout. Like if there is 10 row in my ListView and 10 row have that image. I want to hide only for the particular row.
I hope you understand my question...Thanks in Advance
Here's my ListViewAdapter
public class ListViewAdapter extends ArrayAdapter<FileName> {
Context context;
LayoutInflater inflater;
List<FileName> filenames;
private SparseBooleanArray mSelectedItemsIds;
public ListViewAdapter(Context context,int resource,List<FileName> filenames) {
super(context, resource, filenames);
mSelectedItemsIds = new SparseBooleanArray();
this.context = context;
this.filenames = filenames;
inflater = LayoutInflater.from(context);
}
private class ViewHolder {
TextView filename;
TextView shorttext;
ImageView imageView;
}
public View getView(int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.listview_item, null);
// Locate the TextViews in listview_item.xml
holder.filename = (TextView) view.findViewById(R.id.item_title);
holder.shorttext = (TextView) view.findViewById(R.id.item_desc);
holder.imageView = (ImageView) view.findViewById(R.id.lock);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Capture position and set to the TextViews<br />
holder.filename.setText(filenames.get(position).getName());
holder.shorttext.setText(filenames.get(position).getShorttext());
return view;
}
}
name = filenames.get(position).getName(); //getting the positin from listview
filenames.set(name,FileName.isVisible = true); //getting error on isVisible

I have writen a Sample code and tested
MainActivity
public class MainActivity extends AppCompatActivity {
List<FileName> filenames;
DBhelper dBhelper;dBhelper
SQLiteDatabase sqLiteDatabase;
ListViewAdapter listViewAdapter;
ListView listView;
ImageView lock;
String name;
//temporary button i have added
Button lockBTN;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sample);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
listView = (ListView) findViewById(R.id.lv_filename);
lockBTN = (Button) findViewById(R.id.lock);
filenames = getResult();
listViewAdapter = new ListViewAdapter(this, filenames);
listView.setAdapter(listViewAdapter);
lockBTN.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//giving statically position is 2
int position = 2;
// when you press menu button or any other button
FileName fileName = filenames.get(position);
//here you can set true-Show and false-hide imageview
fileName.setVisible(true);
//and update the list
filenames.set(position, fileName);
listViewAdapter.notifyDataSetChanged();
}
});
}
//temporary data to show on listview
private List<FileName> getResult() {
List<FileName> fileNames = new ArrayList<>();
String[] nameArr = {"Name1", "Name2", "Name3"};
String[] shortTextArr = {"ShortText1", "ShortText2", "ShortText3"};
for(int i=0; i<nameArr.length;i ++){
FileName fileName = new FileName();
fileName.setName(nameArr[i]);
fileName.setShorttext(shortTextArr[i]);
//setting default is hide to imageview
fileName.setVisible(false);
fileNames.add(fileName);
}
return fileNames;
}
}
FileName
public class FileName {
private String name;
private String shorttext;
private boolean visible = true;
public String getName() {
return name;
}
public void setName(String _name) {
this.name = _name;
}
public String getShorttext() {
return shorttext;
}
public void setShorttext(String _shorttext) {
this.shorttext = _shorttext;
}
public boolean isVisible() {
return visible;
}
public void setVisible(boolean visible) {
this.visible = visible;
}
}
ListViewAdapter
public class ListViewAdapter extends BaseAdapter{
Context context;
LayoutInflater inflater;
List<FileName> filenames;
private SparseBooleanArray mSelectedItemsIds;
public ListViewAdapter(Context context, List<FileName> filenames) {
mSelectedItemsIds = new SparseBooleanArray();
this.context = context;
this.filenames = filenames;
inflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return filenames.size();
}
#Override
public Object getItem(int position) {
return filenames.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.listview_item, null);
// Locate the TextViews in listview_item.xml
holder.filename = (TextView) view.findViewById(R.id.item_title);
holder.shorttext = (TextView) view.findViewById(R.id.item_desc);
holder.imageView = (ImageView) view.findViewById(R.id.lock);
//holder.filename.setPaintFlags(holder.filename.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Capture position and set to the TextViews<br />
holder.filename.setText(filenames.get(position).getName());
holder.shorttext.setText(filenames.get(position).getShorttext());
// check weather image is to show/hide
if (filenames.get(position).isVisible()) {
holder.imageView.setVisibility(View.VISIBLE);
} else {
holder.imageView.setVisibility(View.GONE);
}
return view;
}
private class ViewHolder {
TextView filename;
TextView shorttext;
ImageView imageView;
}
}
activity_main.xml
<RelativeLayout 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"
android:padding="5dp"
android:orientation="vertical">
<ListView
android:id="#+id/lv_filename"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/lock"/>
<Button
android:id="#+id/lock"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Lock"/>
</RelativeLayout>
custom_list_item.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1">
<ImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/utilities_notepad_icon" />
<LinearLayout
android:layout_width="232dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="0.77">
<TextView
android:id="#+id/item_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="1dp"
android:paddingTop="5dp"
android:text="Item Title"
android:textSize="16dp" />
<TextView
android:id="#+id/item_desc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLength="35"
android:paddingBottom="5dp"
android:paddingTop="1dp"
android:text="Item Description"
android:textColor="#999"
android:textSize="10dp" />
</LinearLayout>
<ImageView
android:id="#+id/lock"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/lo"
android:layout_marginTop="13sp" />
</LinearLayout>

Take a extra variable in your FileName class.
public class FileName {
public String name;
public String shortText;
public boolean visible = true; // Set the default value to true.
}
Now on external button click in your main layout, you might consider updating the list item accordingly. Just set the visible variable to false of that item you want to hide. Then call notifyDataSetChanged() on your adapter to reload the data.
And yes, in your adapter, just check the value of visible attribute and then decide to hide/show the ImageView. So the getView function of your adapter should look like this.
public View getView(int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.listview_item, null);
// Locate the TextViews in listview_item.xml
holder.filename = (TextView) view.findViewById(R.id.item_title);
holder.shorttext = (TextView) view.findViewById(R.id.item_desc);
holder.imageView = (ImageView) view.findViewById(R.id.lock);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Capture position and set to the TextViews<br />
holder.filename.setText(filenames.get(position).getName());
holder.shorttext.setText(filenames.get(position).getShorttext());
// Hide/Show the ImageView
if (filenames.get(position).visible) holder.imageView.setVisibility(View.VISIBLE);
else holder.imageView.setVisibility(View.GONE);
return view;
}

I would suggest you to use RecyclerView instead of ListView. RecyclerView got more performance than the ListView. Now a days all are using RecyclerView instead of old ListView, it is quite easy to use as well.
And for handling your case create a function to remove the file name you wanted to remove in the RecyclerViewAdapter class as below
removeImageView(position){
fileNames.remove(position);
this.notifyItemRemoved(position);
}
notifyItemRemoved call will refresh the position in the recycler view and you will also get a nice view removing animation out of the box.

Data not showing in static way using listview

I am new to android and i am working on listview. I am trying to show data using listview in xml and adapter in class file. I am working on following 3 files.
First file: 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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.listpractice.MainActivity" >
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:drawSelectorOnTop="false"
></ListView>
</RelativeLayout>
Second file: row1.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="?android:attr/listPreferredItemHeight" >
<ImageView
android:id="#+id/icon"
android:contentDescription="#string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:layout_marginEnd="10dp"
android:src="#drawable/ic_launcher"
/>
<TextView
android:id="#+id/firstTextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_toRightOf="#id/icon"
android:layout_toEndOf="#id/icon"
android:textSize="30sp"
android:text="#string/hello_world"
/>
<TextView
android:id="#+id/secondTextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/icon"
android:layout_toEndOf="#id/icon"
android:layout_below="#id/firstTextView"
android:textSize="13sp"
android:text="#string/hello_world"
/>
</RelativeLayout>
Third file: MainActivity.java
package com.listpractice;
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
public class MainActivity extends ListActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
My Problem : Now i want to show data of row1.xml but i don't have dynamic data. how can i show data using third(.class) file.

check out this link it will help http://androidexample.com/Create_A_Simple_Listview_-_Android_Example/index.php?view=article_discription&aid=65&aaid=90
either you need to create adapter file
public class CustomBaseAdapter extends BaseAdapter{
Context context;
List<RowItem> rowItems;
public CustomBaseAdapter(Context context, List<RowItem> items) {
this.context = context;
this.rowItems = items;
}
/*private view holder class*/
private class ViewHolder {
ImageView imageView;
TextView txtTitle;
//TextView txtDesc;
ImageView imgarrow;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
//holder.txtDesc = (TextView) convertView.findViewById(R.id.desc);
holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
holder.imageView = (ImageView) convertView.findViewById(R.id.icon);
holder.imgarrow=(ImageView)convertView.findViewById(R.id.arrow_icon);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
RowItem rowItem = (RowItem) getItem(position);
//holder.txtDesc.setText(rowItem.getDesc());
holder.txtTitle.setText(rowItem.getTitle());
holder.imageView.setImageResource(rowItem.getImageId());
holder.imgarrow.setImageResource(rowItem.getImg());
return convertView;
}
#Override
public int getCount() {
return rowItems.size();
}
#Override
public Object getItem(int position) {
return rowItems.get(position);
}
#Override
public long getItemId(int position) {
return rowItems.indexOf(getItem(position));
}
}
MainActivity
public class MainActivity extends Activity implements OnItemClickListener{
public static final String[] titles = new String[] { "Krish",
"John Cena", "Kane","Roman Reigns"};
public static final Integer[] images = { R.drawable.fourth,R.drawable.second,R.drawable.first,R.drawable.third};
public static final Integer[] imagearow = {R.drawable.arrow,R.drawable.arrow,R.drawable.arrow,R.drawable.arrow };
ListView listView;
List<RowItem> rowItems;
private ImageView btn;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.list_item_home);
//list_travels=(ListView)findViewById(R.id.list_travels);
btn=(ImageView)findViewById(R.id.btnaddhotels);
btn.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View arg0)
{
Intent i=new Intent(HomeScreen.this,Registerhotel_resorts.class);
startActivity(i);
}
});
rowItems = new ArrayList<RowItem>();
for (int i = 0; i < titles.length; i++) {
RowItem item = new RowItem(images[i], titles[i],imagearow[i]);
rowItems.add(item);
}
listView = (ListView) findViewById(R.id.list_hotels);
CustomBaseAdapter adapter = new CustomBaseAdapter(this, rowItems);
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Toast toast = Toast.makeText(getApplicationContext(),
"Item " + (position + 1) + ": " + rowItems.get(position),
Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
Intent i1=new Intent(HomeScreen.this,KrishnaParkResort.class);
startActivity(i1);
}
}

You should read this article on Building Layouts with an Adapter. It has some handy concepts which you will need to get your head around.
The fundamental concept is that you need to link your ListView to an Adapter which populates the rows and adds them to the ListView.
Looking at your row1.xml, it looks like you will need a collection of objects which contain;
An image for icon
String for firstTextView
String for secondTextView
You can build a little snippet to create an array of prepopulated objects for test purposes.
public class YourObject {
private Bitmap icon;
private String text1;
private String text2;
public YourObject(Bitmap icon, String text1, String text2) {
this.icon = icon;
this.text1 = text1;
this.text2 = text2;
}
// GETTERS AND SETTERS
}
Then create a collection of them
List<YourObject> data = new ArrayList<>();
for (int z = 0; z < 5; z++) {
YourObject yourObject = new YourObject(yourIcon, "Text1: " + z, "Text2: " + z);
data.add(yourObject);
}
Once you have this collection, you send it to a your Adapter constructor along with the reference to row1.xml, then follow the guide to populate the rows.

Android - ArrayList<Integer> not displaying properly in custom listVIew

I have a custom listView with three textViews. The data comes from a class with three ArrayLists, two of which are strings and the last one is an Integer. I have no problems populating and adding items to the list as I saw that when I displayed the ArrayList values on logCat via log.d, all three ArrayLists had their respectful items.
It seems to me that there is something wrong with the way I display data.
Here are the files:
list_row_layout.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/variant"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="variant" />
<TextView
android:id="#+id/quantity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="quantity" />
<TextView
android:id="#+id/unit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginRight="221dp"
android:layout_toLeftOf="#+id/quantity"
android:text="unit" />
</RelativeLayout>
Here is the part in my activity_order_form.xml that has the listView element.
<RelativeLayout
android:id="#+id/relativeLayout3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_below="#+id/relativeLayout2"
android:orientation="vertical" >
<TextView
android:id="#+id/textViewVariantB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="94dp"
android:text="Variant"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textViewUnit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="123dp"
android:text="Unit"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ListView
android:id="#+id/listViewProductOrder"
android:layout_width="match_parent"
android:layout_height="350dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="#+id/textViewVariantB" >
</ListView>
</RelativeLayout>
Here is the class where the ArrayList are stored.
public class CurrentOrderClass {
private String productName;
//ArrayLists
private ArrayList<String> variantArray = new ArrayList<String>();
private ArrayList<String> unitArray = new ArrayList<String>();
private ArrayList<Integer> quantityArray = new ArrayList<Integer>();
//TODO ArrayList functions
public ArrayList<String> getUnitArray() {
return unitArray;
}
public void setUnitArray(ArrayList<String> unitArray) {
this.unitArray = unitArray;
}
public void addToUnitArray(String unit){
this.unitArray.add(unit);
}
public ArrayList<Integer> getQuantityArray() {
return quantityArray;
}
public void setQuantityArray(ArrayList<Integer> quantityArray) {
this.quantityArray = quantityArray;
}
public void addToQuantityArray(int quantity){
this.quantityArray.add(quantity);
}
public ArrayList<String> getVariantArray() {
return variantArray;
}
public void setVariantArray(ArrayList<String> variantArray) {
this.variantArray = variantArray;
}
public void addToVariantArray(String variantArray){
this.variantArray.add(variantArray);
}
}
Here is the CustomListAdapter.java file
public class CustomListAdapter extends BaseAdapter {
private ArrayList<CurrentOrderClass> listData;
private LayoutInflater layoutInflater;
public CustomListAdapter(Context context, ArrayList<CurrentOrderClass> listData) {
this.listData = listData;
layoutInflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return listData.size();
}
#Override
public Object getItem(int position) {
return listData.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = layoutInflater.inflate(R.layout.list_row_layout, null);
holder = new ViewHolder();
holder.variantView = (TextView) convertView.findViewById(R.id.variant);
holder.unitView = (TextView) convertView.findViewById(R.id.unit);
holder.quantityView = (TextView) convertView.findViewById(R.id.quantity);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.variantView.setText(listData.get(position).getVariantArray().get(position).toString());
holder.unitView.setText(listData.get(position).getUnitArray().get(position).toString());
holder.quantityView.setText(String.valueOf(listData.get(position).getQuantityRow()));
return convertView;
}
static class ViewHolder {
TextView variantView;
TextView unitView;
TextView quantityView;
}
public void setListData(ArrayList<CurrentOrderClass> data){
listData = data;
}
}
This is part of my OrderForm.java activity, this shows the onCreate and the method that populates the listView.
public class OrderForm extends Activity {
public TextView tv;
private int variantPosition;
CustomListAdapter customListAdapter;
CurrentOrderClass currentOrder = new CurrentOrderClass();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_order_form);
tv = (TextView)findViewById(R.id.textViewProduct);
//set variants here
popolateItem();
//set current order listview here
ArrayList image_details = getListData();
final ListView lv1 = (ListView) findViewById(R.id.listViewProductOrder);
customListAdapter = new CustomListAdapter(this, image_details);
lv1.setAdapter(customListAdapter);
}
private ArrayList getListData() {
ArrayList results = new ArrayList();
if(currentOrder.getQuantityArray().size() > 10){
loopUntil = currentOrder.getQuantityArray().size();
for(int i = 0; i < loopUntil; i++){
currentOrder.getQuantityArray();
currentOrder.getUnitArray();
currentOrder.getVariantArray();
results.add(currentOrder);
}
}
else{
loopUntil = 10;
for(int i = 0; i < loopUntil; i++){
currentOrder.getQuantityArray().add(i);
currentOrder.getUnitArray().add("Sample text here." + i);
currentOrder.getVariantArray().add("Another sample text here" + i);
results.add(currentOrder);
}
}
return results;
}
}
When I execute a Log.d statement to display the contents of my ArrayLists, it shows that my quantityArray has elements [0, 1, 2, 3, 4, 5, 6, 7, 9].
I know I can just convert quantityArray to an ArrayList from an ArayList, but I don't want to do that.
I think there's something wrong with my CustomListAdapter.
Any thoughts?

There is no where that you actually set the view, as in, it doesn't do anything, if convertView is null, you can't call any methods of it, convertView, if its is not null, will be ViewHolder in your context, what you need to do is have an object which is extending some type of view, instantiate it, give it methods to set the values, things like that.
For example here is what I use in an adapter that displays simple messages:
public class MessageView extends RelativeLayout {
private TextView mBody;
private String mBodyString = "";
private boolean mDrawn = false;
private boolean mLocal = false;
public MessageView(Context context) {
super(context);
this.drawView();
}
public MessageView(Context context, String body) {
super(context);
mBodyString = body;
this.drawView();
}
public MessageView(Context context, String body, boolean local) {
super(context);
mBodyString = body;
mLocal = local;
this.drawView();
}
private void drawView() {
if (mDrawn)
return;
mDrawn = true;
this.removeAllViews();
LayoutInflater li = (LayoutInflater) this.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
if(mLocal){
this.addView(li.inflate(R.layout.list_item_message_device, this, false),
params);
}else{
this.addView(li.inflate(R.layout.list_item_message_remote, this, false),
params);
}
mBody = (TextView) this.findViewById(R.id.tMessage);
mBody.setText(mBodyString);
}
public void setLocal(){
this.setLocal(true);
}
public void setLocal(boolean local){
mLocal = local;
mDrawn = false;
this.drawView();
}
public void setMessage(String body){
mBodyString = body;
mBody.setText(mBodyString);
}
}

I got it.
I changed
holder.quantityView.setText(String.valueOf(listData.get(position).getQuantityRow()));
to
holder.quantityView.setText(String.valueOf(listData.get(position).getQuantityArray().get(position)));

Custom List View with OnClickListener

I have custom ListView layout with a TextView and CheckBox. Everything works fine.
What I want is, when I click on the CheckBox or TextView (on the single View from ListView) both should behave like one object. (I can click on the CheckBox and it does not effect the TextView and TextView has no effect on CheckBox.) Code has no problem.
I have implemented all possible solutions but problem is still there. (One single click on every object of list should consider ONE COMPLETE CLICK for complete row.) I hope I explained very well.
MAIN ACTIVITY
package com.example.smsplanner;
public class SMSPlanner extends ListActivity {
ListView contactsListView;
private String TAG = "SMSPlanner"; CheckBox check;
int count;
List<ContactInfo> list = new ArrayList<ContactInfo>();
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
ph = new String[3];
phType = new String[3];
LoadContactListFromPhone();
ContactsAdapter contactadAdapter = new ContactsAdapter(this, list);
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
setListAdapter(contactadAdapter);
}
#Override
public void onListItemClick(ListView parent, View v, int position, long id)
{
TextView tx =(TextView)v.findViewById(R.id.firstname);
TextView ph =(TextView)v.findViewById(R.id.phone);
Toast.makeText(this, tx.getText().toString() + " " + ph.getText().toString() + " " + Integer.toString(count), Toast.LENGTH_SHORT).show();
}
final class ContactHolder{
TextView txtviewfirstname;
CheckBox chkselected;
TextView txtviewphone;
}
void LoadContactListFromPhone()
{
loadlistandreturns();
}
void call()
{
Toast toast = Toast.makeText(this, "Called...",Toast.LENGTH_LONG);
toast.show();
}
}
CUSTOM ADAPTER
public class ContactsAdapter extends ArrayAdapter<ContactInfo>
{
private final Activity context;
int resourceid;
List<ContactInfo> list = null;
public ContactsAdapter(Activity context, List<ContactInfo> list) {
super(context, R.layout.contactrow, list);
this.context = context;
this.list = list;
}
#Override
public View getView(int position, View convertview, ViewGroup viewgroup){
View view = null;
if(convertview == null){
LayoutInflater inflater = context.getLayoutInflater();
view = inflater.inflate(R.layout.contactrow, null);
ContactHolder holder = new ContactHolder();
holder.txtviewfirstname = (TextView)view.findViewById(R.id.firstname);
holder.txtviewphone = (TextView)view.findViewById(R.id.phone);
holder.chkselected = (CheckBox)view.findViewById(R.id.check);
view.setTag(holder);
}
else{
view = convertview;
}
ContactHolder holder2 = (ContactHolder) view.getTag();
holder2.txtviewfirstname.setText(list.get(position).firstname);
holder2.txtviewphone.setText(list.get(position).phonenumber);
holder2.chkselected.setChecked(list.get(position).selected);
return view;
}
final class ContactHolder{
TextView txtviewfirstname;
CheckBox chkselected;
TextView txtviewphone;
}
}
LAYOUT
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="100" >
<RadioGroup
android:id="#+id/rgStyle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="15"
android:orientation="vertical" >
<TextView
android:id="#+id/firstname"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/phone"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:textAppearance="?android:attr/textAppearanceSmall" />
</RadioGroup>
<RadioGroup
android:id="#+id/rgStyle2"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_weight="85"
android:orientation="vertical" >
<CheckBox
android:id="#+id/check"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:checked="false"
android:focusable="false"
android:focusableInTouchMode="false" >
</CheckBox>
</RadioGroup>
</LinearLayout>

1. Bydefault all the Rows of the ListView are enabled to listen to click....
You must implement onItemClickListener() for the ListView....
See this example:
http://www.mkyong.com/android/android-listview-example/

you can use a CheckedTextView, or you can create a Checkable Layout, like this one :
http://tokudu.com/2010/android-checkable-linear-layout/

i think you should make adapter as
public class ContactsAdapter extends BaseAdapter {
ArrayList<ContactInfo> mlist;
Context mcontext;
public BluetoothChatadpter(Context context,ArrayList<ChatInfo> mchtlist) {
mlist = mchtlist;
mcontext = context;
}
#Override
public int getCount() {
return mlist.size();
}
#Override
public Object getItem(int postion) {
return mlist.get(postion);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertview, ViewGroup viewgroup){
View view = null;
if(convertview == null){
LayoutInflater inflater = context.getLayoutInflater();
view = inflater.inflate(R.layout.contactrow, null);
ContactHolder holder = new ContactHolder();
holder.txtviewfirstname = (TextView)view.findViewById(R.id.firstname);
holder.txtviewphone = (TextView)view.findViewById(R.id.phone);
holder.chkselected = (CheckBox)view.findViewById(R.id.check);
setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// to open the selected file in resp
// do your work here
}});
chkselected .setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Toast.makeText(context,// "checked is clicke="+pos, 12).show();
if (chkselected.isChecked())
{
// do your work here
} else {
// do your work here
}
}
});
view.setTag(holder);
}
else{
view = convertview;
}
ContactHolder holder2 = (ContactHolder) view.getTag();
holder2.txtviewfirstname.setText(list.get(position).firstname);
holder2.txtviewphone.setText(list.get(position).phonenumber);
holder2.chkselected.setChecked(list.get(position).selected);
return view;
}
}

Custom list displayed is empty

I have a donorview class which extends linearlayout which is as follows:
public class donorview extends LinearLayout {
private TextView donortext;
private String donorstr;
private ImageButton call;
private ImageButton msg;
private String donornumber;
private Context context1;
private View convertView;
public donorview(Context context, String donorname1, String donornum) {
super(context);
context1 = context;
// TODO Auto-generated constructor stub
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.listformat, null);
convertView.setClickable(true);
donortext = (TextView) findViewById(R.id.donornametext);
call = (ImageButton) findViewById(R.id.call);
msg = (ImageButton) findViewById(R.id.msg);
System.out.println("donorname:"+donorname1);
System.out.println("donornum:"+donornum);
donortext.setText(donorname1);
System.out.println("after setting text");
donorstr = donorname1;
donornumber = donornum;
}
void onClickCall(){
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + donornumber));
convertView.getContext().startActivity(callIntent);
}
public void setdonorname(String donorname12) {
donortext.setText(donorname12);
}
public String getdonorname() {
return this.donorstr;
}
}
I get a NullPoinerException as
java.lang.NullPonintereException
at com.wglxy.example.dash1.donorview.<init>(donorview.java:35)
while setting the text of the textview donortext. My XML layout of the listformat is
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="#+id/linerlayout1"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:id="#+id/donornametext" android:layout_height="wrap_content"
android:layout_width="wrap_content" android:layout_weight="1" android:text="a"/>
<ImageButton android:layout_width="wrap_content" android:id="#+id/call"
android:layout_height="wrap_content" android:contentDescription="#string/description_about"
android:src="#drawable/call" android:onClick="onClickCall"
android:background="#ffffff" />
<ImageButton android:layout_width="wrap_content" android:id="#+id/msg"
android:layout_height="wrap_content" android:contentDescription="#string/description_about"
android:src="#drawable/msg" android:onClick="onClickMsg"
android:background="#ffffff" />
</LinearLayout>
I dont understand what I am doing wrong. The list that is being displayed is empty. When i am printing the donorname and donornum it is being printed but the custom list displayed is empty.I have been trying to figure it out from a long time. Could anyone please help me with this?
My adapter code is as follows
public class donorAdapter extends BaseAdapter {
private Activity activity;
ArrayList<String> names = new ArrayList<String>();
ArrayList<String> nums = new ArrayList<String>();
private Context context;
private String strnum;
private String strname;
private static LayoutInflater inflater = null;
public donorAdapter(Context context, Activity a, ArrayList<String> names,
ArrayList<String> nums) {
this.context = context;
activity = a;
this.names = names;
this.nums = nums;
inflater = LayoutInflater.from(activity);
}
public int getCount() {
return names.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
donorview fv;
if (convertView == null) {
System.out.println("inside getview:"+names.get(position).toString());
strname=names.get(position).toString();
strnum=nums.get(position).toString();
System.out.println("inside getview:"+nums.get(position).toString());
fv = new donorview(context, strname,strnum);
convertView = fv;
}
else {
((donorview) convertView).setdonorname(names.get(position)
.toString());
}
convertView.setClickable(true);
convertView.setFocusable(true);
return convertView;
}
}
-Thanks in advance

You should use
donortext = (TextView)convertView.findViewById(R.id.donornametext);
and also replace your code by
convertView = inflater.inflate(R.layout.listformat, this);

Replace
findViewById
with
convertView.findViewById()
you use findViewById, when you have already set the content for the activity, in your case you did not , so you have to specify which view it has to look to get the id. You have to do the same for the rest of your views.

Develop Reference

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