Develop Reference

ORMLite and ListView

I'm using ORMLite and I want to display data in a listView, for example, I have a List of SMS (id, number, message) so when I do a query for all I have all of my data and now I want to do a view to display each data, so I found how to do a listView but I don't know how to display the number and the message on each row...
public class SMSActivity extends Activity {
ListView lview;
SMSAdapter lviewAdapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sms);
DatabaseHandler db = new DatabaseHandler(this);
Dao<SMS, Integer> SMSDao = null;
try {
SMSDao = db.getSMSDao();
final List<SMS> users = SMSDao.queryForAll();
Log.d("list", users.toString());
lview = (ListView) findViewById(R.id.mainListView);
lviewAdapter = new SMSAdapter(this, ?, ?);
System.out.println("adapter => "+lviewAdapter.getCount());
lview.setAdapter(lviewAdapter);
} catch (SQLException e) {
e.printStackTrace();
}
}
}
SMSAdapter:
public class SMSAdapter extends BaseAdapter {
Activity context;
String title[];
String description[];
public SMSAdapter(Activity context, String[] title, String[] description) {
super();
this.context = context;
this.title = title;
this.description = description;
}
public int getCount() {
// TODO Auto-generated method stub
return title.length;
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
private class ViewHolder {
TextView txtViewTitle;
TextView txtViewDescription;
}
public View getView(int position, View convertView, ViewGroup parent)
{
// TODO Auto-generated method stub
ViewHolder holder;
LayoutInflater inflater = context.getLayoutInflater();
if (convertView == null)
{
convertView = inflater.inflate(R.layout.row_sms, null);
holder = new ViewHolder();
holder.txtViewTitle = (TextView) convertView.findViewById(R.id.firstLine);
holder.txtViewDescription = (TextView) convertView.findViewById(R.id.secondLine);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
holder.txtViewTitle.setText(title[position]);
holder.txtViewDescription.setText(description[position]);
return convertView;
}
}

First of all, i would suggest that you use RecyclerView instead of ListView. Second, also my suggestion is to pass whole list of users in the adapter.
I think you would like to do this:
//...
lview = (ListView) findViewById(R.id.mainListView);
List<String> messages = new ArrayList<String>();
List<String> numbers = new ArrayList<String>();
for(int i = 0; i < users.size(); i++){
SMS sms = users.get(i);
messages.add(sms.getMessage());
numbers.add(sms.getNumber());
}
lviewAdapter = new SMSAdapter(this, numbers, messages);
System.out.println("adapter => "+lviewAdapter.getCount());
lview.setAdapter(lviewAdapter);
//...
Your adapter requires two arrays of strings and you can get them from the users list.

Android custom listview layout

im new to android and java programming. Im having trouble getting my custom layout (currently with only one textview in it to work with my code. I have followed many tutorials and look and many examples but still Im getting confused as to how I would integrate it with my existing code.
Any help would be appreciated.
Here is my code:
public class checkListActivity extends MainActivity {
static String filename = "checkList";
String currentList;
SharedPreferences checkListData;
SharedPreferences.Editor checkListEditor;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.checklist);
Button bAddItem = (Button) findViewById(R.id.bAddItem);
final EditText etItemName = (EditText) findViewById(R.id.etItemName);
final TextView tvTitle = (TextView) findViewById(R.id.tvTitle);
final ListView lvCheckList = (ListView) findViewById(R.id.lvCheckLists);
Bundle extras = getIntent().getExtras();
if (extras != null) {
String selectedItem = extras.getString("selectedItem");
// get the value based on the key
currentList = selectedItem;
}
tvTitle.setText(currentList);
checkListData = getSharedPreferences(filename, 0);
updateListView();
// Button Click Listener
bAddItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String checkListStringData = etItemName.getText().toString();
checkListData = getSharedPreferences(filename, 0);
SharedPreferences.Editor checkListEditor = checkListData.edit();
checkListEditor.putString(currentList + "ItemName",
checkListStringData);
checkListEditor.commit();
String checkListDataReturned = checkListData.getString(
currentList + "ItemName", currentList);
tvTitle.setText(checkListDataReturned);
updateListView();
etItemName.setText("");
};
});
}
private void updateListView() {
final ListView lvCheckList = (ListView) findViewById(R.id.lvCheckList);
Map<String, ?> keys = checkListData.getAll();
ArrayList<String> checkListStrings = new ArrayList<String>();
for (Map.Entry<String, ?> entry : keys.entrySet()) {
if (entry.getValue() instanceof String) {
if (entry.getKey().equals(currentList + "ItemName")) {
checkListStrings.add((String) entry.getValue());
}
}
ArrayAdapter<String> checkListArrayAdapter = new ArrayAdapter<String>(
this, R.layout.single_listview_item);
lvCheckList.setAdapter(checkListArrayAdapter);
}
}
}

first create this custom adapter class...
private static class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public Context con;
public String[] sms;
public EfficientAdapter(Context context,String[] rssFeed) {
mInflater = LayoutInflater.from(context);
this.con=context;
this.sms=rssFeed;
}
public int getCount() {
return sms.length;
}
public Object getItem(int position) {
return sms[position];
}
public long getItemId(int position) {
return position;
}
#SuppressLint({ "SdCardPath", "InflateParams", "ResourceAsColor" })
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list, null);
holder = new ViewHolder();
holder.text2 = (TextView) convertView.findViewById(R.id.text_list_f);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.text2.setText(sms[position]);
}
return convertView;
}
}
static class ViewHolder {
TextView text2;
}
then use it in your activity ...
list.setAdapter(new EfficientAdapter(this, your array));

Custom BaseAdapter wont add new Data - Android

I have a custom baseadapter that creates comment boxes. Everything works great on it until I want to add data. When I try to add the data it deletes the previous data and adds the new data. How do I make it so it keeps all the data? Is my Add method incorrect? Here is my baseadapter,
class CreateCommentLists extends BaseAdapter{
Context ctx_invitation;
String[] listComments;
String[] listNumbers;
String[] listUsernames;
public CreateCommentLists(String[] comments, String[] usernames, String[] numbers, DashboardActivity context)
{
super();
ctx_invitation = context;
listComments = comments;
listNumbers = usernames;
listUsernames = numbers;
}
#Override
public int getCount() {
if(null == listComments)
{
return 0;
}
// TODO Auto-generated method stub
return listComments.length;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return listComments[position];
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v = null;
try
{
String inflater = Context.LAYOUT_INFLATER_SERVICE;
LayoutInflater li = (LayoutInflater)ctx_invitation.getSystemService(inflater);
v = li.inflate(R.layout.list_item, null);
TextView commentView = (TextView)v.findViewById(R.id.listComment);
TextView NumbersView = (TextView)v.findViewById(R.id.listNumber);
TextView usernamesView = (TextView)v.findViewById(R.id.listPostedBy);
Button usernameButton = (Button)v.findViewById(R.id.listUsernameButton);
Button numberButton = (Button)v.findViewById(R.id.listNumberButton);
commentView.setText(listComments[position]);
NumbersView.setText(listNumbers[position]);
usernamesView.setText(listUsernames[position]);
usernameButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(), ProfileActivity.class);
i.putExtra("usernameOfProfile",listUsernames[position]);
startActivity(i);
finish();
}
});
numberButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent i = new Intent(getApplicationContext(), ProfileActivity.class);
i.putExtra("NumberProfile",listNumbers[position]);
startActivity(i);
finish();
}
});
}
catch(Exception e)
{
e.printStackTrace();
}
return v;
}
public void add(String[] comments, String[] usernames,
String[] numbers) {
listComments = comments;
listNumbers = usernames;
listUsernames = numbers;
}
public int getCount1() {
if(null == listComments)
{
return 0;
}
// TODO Auto-generated method stub
return listComments.length;
}
public Object getItem1(int position) {
// TODO Auto-generated method stub
return listComments[position];
}
public long getItemId1(int position) {
// TODO Auto-generated method stub
return 0;
}
public View getView1(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v = null;
try
{
String inflater = Context.LAYOUT_INFLATER_SERVICE;
LayoutInflater li = (LayoutInflater)ctx_invitation.getSystemService(inflater);
v = li.inflate(R.layout.list_item, null);
TextView commentView = (TextView)v.findViewById(R.id.listComment);
TextView NumbersView = (TextView)v.findViewById(R.id.listNumber);
TextView usernamesView = (TextView)v.findViewById(R.id.listPostedBy);
Button usernameButton = (Button)v.findViewById(R.id.listUsernameButton);
Button numberButton = (Button)v.findViewById(R.id.listNumberButton);
commentView.setText(listComments[position]);
NumbersView.setText(listNumbers[position]);
usernamesView.setText(listUsernames[position]);
usernameButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(), ProfileActivity.class);
i.putExtra("usernameOfProfile",listUsernames[position]);
startActivity(i);
finish();
}
});
numberButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent i = new Intent(getApplicationContext(), ProfileActivity.class);
i.putExtra("NumberProfile",listNumbers[position]);
startActivity(i);
finish();
}
});
}
catch(Exception e)
{
e.printStackTrace();
}
return v;
}
}
Setting the adapter:
final CreateCommentLists mycmlist = new CreateCommentLists(comments, usernames, numbers, DashboardActivity.this);
lstComments = (ListView)findViewById(android.R.id.list);
lstComments.setAdapter(mycmlist);
This is what how I call the add method,
mycmlist.add(comments,usernames,numbers);
mycmlist.notifyDataSetChanged();

In your add method you're setting the arrays to new values listComments = comments; That's replacing your old data with the new data.
You could use System.arrayCopy() to resize your listArrays to the new size and append the new items. A much less tedious approach, however, would be to store your arrays as List<String>, allowing you to add more items without worrying about resizing lists.
The result would look something like this...
public class CommentsAdapter extends BaseAdapter
{
private LayoutInflater inflater;
private List<String> comments;
private List<String> numbers;
private List<String> usernames;
public CommentsAdapter(Context context)
{
inflater = LayoutInflater.from(context);
comments = new ArrayList<String>();
numbers = new ArrayList<String>();
usernames = new ArrayList<String>();
}
public void add(String[] comments, String[] numbers, String[] usernames)
{
this.comments.addAll(Arrays.asList(comments));
this.numbers.addAll(Arrays.asList(numbers));
this.usernames.addAll(Arrays.asList(usernames));
notifyDataSetChanged();
}
#Override
public int getCount()
{
if (comments == null)
return 0;
return comments.size();
}
#Override
public String getItem(int position)
{
return comments.get(position);
}
#Override
public long getItemId(int position)
{
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
if (convertView == null)
{
convertView = inflater.inflate(R.layout.list_item, parent, false);
convertView.setTag(new ViewHolder(convertView));
}
ViewHolder holder = (ViewHolder) convertView.getTag();
holder.commentView.setText(comments.get(position));
//Other view bind logic here...
return convertView;
}
private static class ViewHolder
{
public TextView commentView;
public TextView numbersView;
public TextView usernamesView;
public Button usernameButton;
public Button numberButton;
public ViewHolder(View v)
{
commentView = (TextView) v.findViewById(R.id.listComment);
numbersView = (TextView) v.findViewById(R.id.listNumber);
usernamesView = (TextView) v.findViewById(R.id.listPostedBy);
usernameButton = (Button) v.findViewById(R.id.listUsernameButton);
numberButton = (Button) v.findViewById(R.id.listNumberButton);
}
}
}
I also highly recommend reading this page on the Android Developer's site: http://developer.android.com/training/improving-layouts/smooth-scrolling.html
Your current adapter implementation is very inefficient, and that page should help you iron out some kinks.

You probably need to add the String[] array to the existing one, instead of replacing it.
Add this function which joins two arrays (Sadly there is no already-implemented method for Java):
String[] concat(String[] A, String[] B) {
String[] C= new String[A.length + B.length];
System.arraycopy(A, 0, C, 0, A.length);
System.arraycopy(B, 0, C, A.length, B.length);
return C;
}
Credits: Sun Forum
And then change the add method to this:
public void add(String[] comments, String[] usernames,
String[] numbers) {
listComments = concat(listComments, comments);
listUsernames = concat(listUsernames, usernames);
listNumbers = concat(listNumbers, numbers);
}
And you had a typo in your code. In the add method, the listUsernames and listNumbers should be swapped I think.. I fixed it for you.

How do I get my CustomListAdapter to update on notifyDatasetChange?

This is the first time I am building a Listview with a custom layout, so in case I have missed something obvious please just point it out.
The problem I am having that I cannot get the listview to update itself with new information after the Oncreate(); has been used. So the list is very static.
I am trying to create a custom listview adapter that looks as such:
public class MainListCustomBaseAdapter extends BaseAdapter {
static ArrayList<ListItems> DataSomething;
static Context Cont;
public MainListCustomBaseAdapter (ArrayList<ListItems> data, Context c){
DataSomething = data;
Cont = c;
}
public int getCount() {
// TODO Auto-generated method stub
return DataSomething.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return DataSomething.get(position);
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v = convertView;
if (v == null)
{
LayoutInflater vi = (LayoutInflater)Cont.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.mainlistlayout, null);
}
ImageView image = (ImageView) v.findViewById(R.id.ListImage);
TextView titleView = (TextView)v.findViewById(R.id.title);
TextView DetailItemView = (TextView)v.findViewById(R.id.DetailItem);
ListItems msg = DataSomething.get(position);
image.setImageResource(msg.icon);
titleView.setText(msg.title);
DetailItemView.setText("ItemDetails: "+msg.ItemDetails);
return v;
}
public void updateResults(ArrayList<MainListCustomBaseAdapter> results){
notifyDataSetChanged();
}
}
My Oncreate looks like this:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecipeList = (ListView) findViewById(R.id.mainListView);
ShoppingItems = new ArrayList<ListItems>();
RecipeList.setAdapter(new MainListCustomBaseAdapter(ShoppingItems, this));
ListItems Detail;
Detail = new ListItems();
Detail.setIcon(R.drawable.food);
Detail.setName("Food Stuff");
Detail.setItemDetails("ItemDetailsComp");
ShoppingItems.add(Detail);
}
and listitem looks like this:
public class ListItems {
public int icon ;
public String title;
public String ItemDetails;
public String getName() {
return title;
}
public void setName(String from) {
this.title = from;
}
public String getItemDetails() {
return ItemDetails;
}
public void setItemDetails(String ItemDetailsComp) {
this.ItemDetails = ItemDetailsComp;
}
public int getIcon() {
return icon;
}
public void setIcon(int icon) {
this.icon = icon;
}
}
How do I get the listview to update dynamically? with maybe a SetInvalidatedViews() or notifyDatasetchanged()?
Any help is deeply appreciated.

Use the below
MainListCustomBaseAdapter adapter = new MainListCustomBaseAdapter(ShoppingItems, this)
RecipeList.setAdapter(adapter);
To refresh or update listview
adapter.notifyDataSetChanged();
public void notifyDataSetChanged ()
Added in API level 1
Notifies the attached observers that the underlying data has been
changed and any View reflecting the data set should refresh itself.

put this line after adding the element in the arraylist
RecipeList.setAdapter(new MainListCustomBaseAdapter(ShoppingItems, this));

Repeating values in listview after back press

I have an application it have two activities. When press a button in the main activity, it shows customized listview, then I press hard back button and go to the main page of my application.
Then I again press the same button and go to the listview it shows the repeated values in the listview.
Any one have any sloution please???
CookList = new ArrayList<HashMap<String, String>>();
try {
url = new URI(cookUri);
List<DataModels> list1 = new ArrayList<DataModels>();
CookListServer cookServer = new CookListServer();
StringBuilder responseString = cookServer.CookConnect(url, "hi");
System.out.println("responseString---------"+responseString);
for(int i=0; i< itemId.size(); i++){
HashMap<String, String> Cook = new HashMap<String, String>();
Cook.put("ItemId", itemId.get(i));
System.out.println("itemId--------"+itemId.get(i));
Cook.put("ItemName", itemName.get(i));
Cook.put("ItemQty", itemQty.get(i));
CookList.add(Cook);
list1.add(get(i));
}
adapter = new MySimpleArrayAdapter(context, CookList, R.layout.cooklist_item, list1);
setListAdapter(adapter);
} catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private DataModels get(int s) {
return new DataModels(s);
}
#Override
public void onResume() {
super.onResume();
adapter.notifyDataSetChanged();
}
#Override
protected void onDestroy() {
super.onDestroy();
}
// Adapter to list the Albums
public class MySimpleArrayAdapter extends ArrayAdapter<HashMap<String, String>> implements SectionIndexer {
private final Context context;
private final ArrayList<HashMap<String, String>> values;
List<DataModels> modellist;
public MySimpleArrayAdapter(Context context, ArrayList<HashMap<String, String>> values, int layout, List<DataModels> modellist) {
super(context, R.layout.cooklist_item, values);
this.context = context;
this.values = values;
this.modellist = modellist;
}
private final class ViewHolder {
public TextView Nametext;
public TextView Qntytext;
public Button prepareButton;
}
private LayoutInflater mLayoutInflater = null;
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
if (convertView == null) {
if (mLayoutInflater == null) {
mLayoutInflater = LayoutInflater.from(context);
}
convertView = mLayoutInflater.inflate(R.layout.cooklist_item, null);
viewHolder = new ViewHolder();
viewHolder.Nametext = (TextView) convertView.findViewById(R.id.label);
viewHolder.Qntytext = (TextView) convertView.findViewById(R.id.textView1);
viewHolder.prepareButton = (Button) convertView.findViewById(R.id.prepareButton1);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
((ViewHolder) convertView.getTag()).prepareButton.setTag(modellist.get(position));
}
final HashMap<String, String> cooklist = values.get(position);
final ViewHolder holder = (ViewHolder) convertView.getTag();
final String ItemId = cooklist.get("ItemId");
final String ItemName = cooklist.get("ItemName");
final String ItemQty = cooklist.get("ItemQty");
System.out.println("ItemId---------"+ItemId);
System.out.println("ItemName---------"+ItemName);
System.out.println("ItemQty---------"+ItemQty);
holder.Nametext.setText(ItemName);
holder.Qntytext.setText(ItemQty);
registerForContextMenu(convertView);
holder.prepareButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
DataModels element = (DataModels) viewHolder.prepareButton.getTag();
holder.prepareButton.setEnabled(false);
}
});
return convertView;
}
#Override
public int getPositionForSection(int arg0) {
// TODO Auto-generated method stub
return 0;
}
#Override
public int getSectionForPosition(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public Object[] getSections() {
// TODO Auto-generated method stub
return null;
}
}
Thanks...

I got a solution
#Override
protected void onDestroy() {
itemId.clear();
itemName.clear();
itemQty.clear();
super.onDestroy();
}
Thanks....