Develop Reference

CursorAdapter changed style of SwipeMenuListView after scroll

I'm trying to develop an app to record debts in which I have a SwipeMenuListView from this github https://github.com/baoyongzhang/SwipeMenuListView for adding a swipe menu. Using a custom CursorAdapter, I populate the ListView with the name and total debt.
Now, I want to group each listview items depending on the due date. I've created a new column on my SQLite to add a header for each day. Now I just need to use different style for header and items of the ListView. By detecting the new column from bindView and depending on if it's a header or items, it will change, hide and show elements from the same layout.
The problem is that when I scroll the ListView, some of the listview items changed style. It get worse if I keep scrolling up and down. Here's the picture of the error from the listview. Notice that it's all in one session, the header style seems to have been used in some of the items and the header itself changed to red color which suppose to be color code for the items. If I click one of the item, it still get the correct item so I figure its a problem within the cursorAdapter but I just can't figure it out. It is not a mistake in the SQL database which I have checked.
Here's the cursorAdapter.
public class DebtCursorAdapterMain extends CursorAdapter {
public DebtCursorAdapterMain(Context context, Cursor c, int flags) {
super(context, c, flags);
}
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return LayoutInflater.from(context).inflate(R.layout.debt_list_item, parent, false);
}
#Override
public void bindView(View view, Context context, Cursor cursor) {
int x = Integer.parseInt(cursor.getString(cursor.getColumnIndex(DBHelper.DATE_SEPARATOR_COLUMN)));
TextView tvName = (TextView) view.findViewById(R.id.tvName);
TextView tvTotal = (TextView) view.findViewById(R.id.tvTotal);
if(x == 0) {
DecimalFormat df = new DecimalFormat("#.00");
String nameText = cursor.getString(cursor.getColumnIndex(DBHelper.NAME_COLUMN));
String totalText = "$ " + df.format(cursor.getDouble(cursor.getColumnIndex(DBHelper.TOTAL_COLUMN)));
String type = cursor.getString(cursor.getColumnIndex(DBHelper.TYPE_COLUMN));
if (tvName != null)
tvName.setText(nameText);
if (tvTotal != null)
tvTotal.setText(totalText);
if (type.equals("L"))
view.setBackgroundColor(Color.parseColor("#ff9999"));
if (type.equals("B"))
view.setBackgroundColor(Color.parseColor("#99ff99"));
}
if(x == 1){
String date = cursor.getString(cursor.getColumnIndex(DBHelper.DUE_DATE_COLUMN));
if (tvName != null && tvTotal != null) {
tvName.setText(date);
tvName.setTextSize(TypedValue.COMPLEX_UNIT_SP, 22);
tvTotal.setVisibility(View.GONE);
}
}
}
}
Here is the main activity in which the cursorAdapter is called.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Find SwipeMenuListView
final SwipeMenuListView swipeMenuList = (SwipeMenuListView) findViewById(R.id.swipeMenuList);
// Create Debt database cursor adapter
cursorAdapter = new DebtCursorAdapterMain(this, null, 0);
// Create SwipeMenuList and set item
SwipeMenuCreator creator = createMainActivitySwipeMenu();
swipeMenuList.setMenuCreator(creator);
swipeMenuList.setAdapter(cursorAdapter);
swipeMenuList.setSwipeDirection(SwipeMenuListView.DIRECTION_LEFT);
// Set SwipeMenuList on item's menu click
swipeMenuList.setOnMenuItemClickListener(new SwipeMenuListView.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(int position, SwipeMenu menu, int index) {
....
}
});
// Swipe menu on Click function
swipeMenuList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
....
}
});
// Initialize cursor and check database for updating top info
getLoaderManager().initLoader(0, null, this);
checkDataBase();
}
I'm still new in android development so please tell me if there's a better approach to this problem. Thanks guys.

Can AutoCompleteTextView return an ID?

AutoCompleteTextView lets users choose a string from a list of valid values. Like, I imagine, every developer who wants to use this yoke, I am much more interested in the id of the user's selection than its string label. Is there any way to retrieve the id property of a chosen object, or its index in the source array?
The following C# code let's users pick from a list of SomeObject. I'm working in Xamarin, but don't let this put you off. Fix my problem in java and I'll happily make it work in C#
public class AutoCompleteField : PhysicalField
{
protected AutoCompleteTextView actv;
public AutoCompleteField(IList<SomeObject> choices, LogicalField logical, string id)
: base(logical, id)
{
_choices = choices;
}
protected ArrayAdapter<SomeObject> _adapter;
public override void addToView(LayoutInflater inflater)
{
var ctx = App_NotMobility.CurrentActivity;
actv = new AutoCompleteTextView(ctx);
actv.Id = _form.generateId();
// test choices
var _choices = new List<SomeObject>();
_choices.Add(new SomeObject(234, "Oranges"));
_choices.Add(new SomeObject(456, "Apples"));
_choices.Add(new SomeObject(789, "Bananas"));
_adapter = new ArrayAdapter<SomeObject>(ctx, Android.Resource.Layout.SimpleDropDownItem1Line, _choices);
actv.Adapter = _adapter;
actv.ItemClick += delegate(object sender, AdapterView.ItemClickEventArgs e)
{
// HOW DO I ACCESS THE ID OR THE INDEX OF USER'S SELECTION ?????????????????
};
_form.AddView(actv);
}
}
public class SomeObject
{
public int Id { get; set; }
public string Label { get; set; }
public SomeObject(int id, string label)
{
Id = id;
Label = label;
}
public override string ToString()
{
return Label;
}
}

Once you have initialized the adapter and overdid the item click, all you need to do is get the particular object from your adapter at that particular position of item which you clicked.
In java it would be somewhat similar to,
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
SomeObject someObject = (SomeObject) adapter.getItem(position);
int id = someObject.getId();
}
Thats all you would need. I am not sure about your code in xamarin, how you would get the position because i don't see any method where the position is input variable, may be you could add the tag to your view and can get the tag on your click method.
var position = ((View)sender).Tag;
But i would recommend , if you can create a class extend the base adapter, that way you will the method GetView to override and can easily do what you are looking for. You constructor could be like this for start,
List<SomeObjects> items;
Activity context;
public CustomAdapter(Activity context, List<SomeObjects> items)
: base()
{
this.context = context;
this.items = items;
}

Ankush's answer worked. I'm posting the C# code here because there are some subtleties with casting and generics...
public class myActv : AutoCompleteTextView, AdapterView.IOnItemClickListener
{
PhysicalField _physical;
public myActv(Activity ctx, PhysicalField physical) : base(ctx)
{
OnItemClickListener = this;
_physical = physical;
}
public void OnItemClick(AdapterView parent, View view, int position, long id)
{
// This is the punchline...
SomeObject whatIwant = ((ArrayAdapter<SomeObject>)this.Adapter).GetItem(position);
}
}

Here searchText is an Autocompletetextview..
searchText.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
int position = position; //Adapter selection position
}
});

calling remove from custom adapter always removes last item

I have implemented a custom adapter and listItemView. The adapter sets an onlclick listener to a button that is on the listItemView. The onclick listener simply calls a private method I have in the adapter and passes it the position of the item to be removed. I know the position is correct because the database removes the proper item. I have found similar questions but have not been able to adapt the answers to work for me. Ideas and thoughts are greatly appreciated. Thanks.
Here is the full adapter class
public class FoodListAdapter extends ArrayAdapter<FoodListItem> {
//private
private int type;
public FoodListAdapter(Context context, ArrayList<FoodListItem> _objects) {
super(context, 0, _objects);
type = 0;
}
public FoodListAdapter(Context context, ArrayList<FoodListItem> _objects, int _type) {
super(context, 0, _objects);
type = _type;
}
#Override
public View getView(int position, View reusableView, ViewGroup parent)
{
//Cast the reusable view to a listAdpaterItemView
FoodListItemView listItemView = (FoodListItemView) reusableView;
//Check if the listAdapterItem is null
if(listItemView == null)
{
//If it is null, then create a view.
listItemView = FoodListItemView.inflate(parent, this, type);
}
if (type == 2)
{
Button deleteButton = (Button) listItemView.findViewById(R.id.listItemViewDeleteBTN);
deleteButton.setTag(new Integer(position));
}
//Now we need to set the view to display the data.
listItemView.setData(getItem(position));
return listItemView;
}
}
Here is a portion of my code used in fragment. Note that I have a private variable decalred in the class for listAdapter, though I don't think I need that.
private void displayListForDate(Calendar _date)
{
//get the list view
ListView listView = (ListView) getView().findViewById(1);
//Clear the listview by removing the listadapter and setting it to null.
//listView.setAdapter(null);
//First we must get the items.
Global global = (Global) getActivity().getApplicationContext();
DietSQLiteHelper database = global.getDatabase();
//Create a list to hold the items we ate. This list will then be added to the listView.
final ArrayList<FoodListItem> consumedList;
//Add the items to the array.
consumedList = database.getConsumed(_date.getTimeInMillis());
//Create an adapter to be used by the listView
listAdapter = new FoodListAdapter(getActivity().getBaseContext(), consumedList, 2);
//Add the adapter to the listView.
listView.setAdapter(listAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
consumedList.remove(position);
listAdapter.notifyDataSetChanged();
}
});
}

If you didn't implement "equals" method of FoodListItem, try to implements it.

I would suggest,
that you just update the underlying data, in your case its ArrayList<FoodItems>.
In your Adapter make this simple method and change :
private List<FoodListItem> myList = new ArrayList<FoodListItem>();
public FoodListAdapter(Context context, List<FoodListItem> myList) {
super(context, 0, myList);
type = 0;
this.myList = myList;
}
public FoodListAdapter(Context context, List<FoodListItem> myList, int _type) {
super(context, 0, myList);
type = _type;
this.myList = myList;
}
// Also update your getView() method to use myList!
#Override
public View getView(int position, View reusableView, ViewGroup parent)
{
...
listItemView.setData(myList.get(position));
public void removeItem(int positio){
if(myList != null){
myList.remove(position);
}
}
And then in class, you are creating the adapter (Activity/Fragment), just call the method.
// Update the underlying ArrayAdapter
adapter.removeItem(position);
// Notify the adapter, the data has changed
adapter.notifyDataSetChanged();
Also, you shouldnt open connection to your SQLiteDatabase on UI thread, because you are blocking it. You never know, how fast is the reading from disk going to be. If it takes too long, user can think, that your application froze and therefore, he leaves, which you dont want. I would suggest to use AsyncTask, you will find a lot of examples.

I went through and cleaned up my code and it now works, here is the working code. I really don't know exactly the difference other than I updated the IDs that I was using to assign and get views. If anyone can explain the cause for the issue I was having I would appreciate it.
Here is the snippet from my fragment where I create the list view and assign an adapter.
private void displayListForDate(Calendar _date)
{
//get the list view
ListView listView = (ListView) getView().findViewById(R.id.listView);
//Clear the listview by removing the listadapter and setting it to null.
//listView.setAdapter(null);
//First we must get the items.
Global global = (Global) getActivity().getApplicationContext();
DietSQLiteHelper database = global.getDatabase();
//Create a list to hold the items we ate. This list will then be added to the listView.
ArrayList<FoodListItem> consumedList;
//Add the items to the array.
consumedList = database.getConsumed(_date.getTimeInMillis());
//Create an adapter to be used by the listView
listAdapter = new FoodListAdapter(getActivity().getBaseContext(), consumedList, 2);
//Add the adapter to the listView.
listView.setAdapter(listAdapter);
}
and here is my adapter class.
public class FoodListAdapter extends ArrayAdapter<FoodListItem>
{
//private
private int type;
public FoodListAdapter(Context context, ArrayList<FoodListItem> _objects) {
super(context, 0, _objects);
type = 0;
}
public FoodListAdapter(Context context, ArrayList<FoodListItem> _objects, int _type) {
super(context, 0, _objects);
type = _type;
}
#Override
public View getView(int position, View reusableView, ViewGroup parent)
{
//Cast the reusable view to a listAdpaterItemView
FoodListItemView listItemView = (FoodListItemView) reusableView;
//Check if the listAdapterItem is null
if(listItemView == null)
{
//If it is null, then create a view.
listItemView = FoodListItemView.inflate(parent, type);
}
if (type == 2)
{
Button deleteButton = (Button) listItemView.findViewById(R.id.listItemViewDeleteBTN);
deleteButton.setTag(new Integer(position));
deleteButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Integer tag = (Integer) view.getTag();
deleteItem(tag.intValue());
}
});
}
//Now we need to set the view to display the data.
listItemView.setData(getItem(position));
return listItemView;
}
private void deleteItem(int position)
{
FoodListItem item = getItem(position);
Global global = (Global) getContext().getApplicationContext();
DietSQLiteHelper database = global.getDatabase();
database.removeConsumed(item.getID());
remove(getItem(position));
}
}

Custom SimpleCursorAdapter - refresh, update DB

My issue today is related to a custom SimpleCursorAdapter I've implemented. Here are my activities onCreate() and the custom SimpleCursorAdapter :
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
customSharedPreference = getSharedPreferences("myCustomSharedPrefs", Activity.MODE_PRIVATE);
editor = customSharedPreference.edit();
setContentView(R.layout.activity_1);
op = new OperationsClass(getApplicationContext());
op.open();
Cursor cursor = op.getList();
startManagingCursor(cursor);
String[] columns = new String[] { "AAA", "BBB", "CCC"};
int[] to = new int[] { R.id.entry_aaa,R.id.entry_bbb, R.id.entry_ccc};
MyCursorAdapter mAdapter = new MyCursorAdapter(this, R.layout.custom_entry, cursor, columns, to);
this.setListAdapter(mAdapter);
op.close();
}
OperationsClass manages a database and the getList() function returns a cursor of the entries.
public class MyCursorAdapter extends SimpleCursorAdapter{
private Context context;
private MyCursorAdapter here = this;
private int layout;
public MyCursorAdapter (Context context, int layout, Cursor c, String[] from, int[] to) {
super(context, layout, c, from, to);
this.context = context;
this.layout = layout;
}
#Override
public View newView(final Context context, Cursor cursor, ViewGroup parent) {
Cursor c = getCursor();
final LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(layout, parent, false);
int col1 = c.getColumnIndex("aaa");
String name1 = c.getString(col1 );
int col2 = c.getColumnIndex("bbb");
String name2 = c.getString(col2 );
int col3 = c.getColumnIndex("ccc");
int name3 = c.getInt(col3 );
final TextView text1 = (TextView) v.findViewById(R.id.entry_aaa);
final TextView text2 = (TextView) v.findViewById(R.id.entry_bbb);
final TextView text3 = (TextView) v.findViewById(R.id.entry_ccc);
text1.setText(name);
text2.setText(name2);
if (name3 == 0)
text3.setText("Not checked");
else {
text3.setText("Checked");
text3.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
text3.setText("Not checked");
// Here I would like to update my DB using
// OperationsClass and the SharedPrefs,
// and refresh the ListView with the new
// text value.
}
});
}
}
return v;
}
#Override
public void bindView(View v, final Context context, Cursor c) {
// Same operations as higher
}
}
Basically what I want to achieve is to refresh the ListView when the users clicks on the third column, which means its value changes (has been clicked or has not been). In the same time I wish to update the DB and the SharedPreferences(I could create a new object of both classes and recover from the application context, but that seems pretty heavy).
I also wish to know if there is a way to trigger one of the implemented methods in one activity when an AlertDialog has been opened (in the same app, I actually want to add an element to my database through an AlertDialog and make the Activity that popped it up retrieve a new cursor and refresh its List).

"Basically what I want to achieve is"
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
// if (the id of selected view matches what you want) {
boolean checked;
if (text3.getText().toString() == "checked") {
boolean checked = true;
} else {
boolean checked = false;
}
op.updateRead(id, checked);
refreshCursorAdapter();
setSharedPrefs();
// }
"to refresh the ListView when the users clicks on the 3rd column, which means its value changes (has been clicked or has not been)."
private void refreshCursorAdapter() {
Cursor cursor = op.getList();
mAdapter.changeCursor(cursor);
}
"In the same time I wish to update the DB"
private boolean updateRead(long rowId, boolean checked) {
ContentValues args = new ContentValues();
if (checked) {
args.put("read", "1");
} else {
args.put("read", "0");
}
return db.update(DB_TABLE, args, "_id =" + rowId, null) > 0;
}
"and the SharedPrefereces"
private void setSharedPrefs() {
SharedPreferences settings = getSharedPreferences("MYPREFS", 0);
SharedPreferences.Editor editor = settings.edit();
if (checked) {
editor.putBoolean("read", false);
} else {
editor.putBoolean("read", true);
}
editor.commit();
}
"I also wish to know if there is a way to trigger one of the implemented methods in one activity when an AlertDialog has been opened"
Quite honestly i don't understand what the mystique behind this one is. The process would involve copying and pasting the same code else to some other event.

Basically what I want to achieve is to refresh the ListView when the
users clicks on the 3rd column, which means its value changes (has
been clicked or has not been). In the same time I wish to update the
DB and the SharedPrefereces (I could create a new object of both
classes and recover from the application context, but that seems
pretty heavy).
First of all, you shouldn't be implementing that logic in the newView method because that method will not be called for every row due to the recycling. The newView should be used only to build a new row view and nothing more. Use the bindView method for any row logic.
Regarding the code in the onClick method I don't see where do you have problems. Update the database based on your logic and then query again the database for a Cursor with the new data and then use swapCursor() to update the adapter with the new values. This should work but it's not the recommended way mainly because you're doing every database operation on the main UI thread. Don't use the startManagingCursor method because this method runs the queries on the main UI thread, instead have a look at implementing a Loader in your activity to load data off the main UI thread. With a Loader you'll update the database values and then simply restart the Loader to update the list.
I also wish to know if there is a way to trigger one of the
implemented methods in one activity when an AlertDialog has been
opened (in the same app, I actually want to add an element to my
database through an AlertDialog and make the Activity that poped it up
retrieve a new cursor and refresh its List).
You're not saying anything about how you show that AlertDialog. If you want to update the list after you add the new element then use the listeners for the AlertDialog's buttons and the same code as above.

How to get correct ID of AutoCompleteTextView adapter

I am new to Android development and I ran into a problem which I find difficult to solve. I am trying to figure out how to use an AutoCompleteTextView widget properly. I want to create a AutoCompleteTextView, using XML data from a web service. I managed to get it to work, but I am defenitely not pleased with the output.
I would like to put a HashMap with id => name pairs into the AutoCompleteTextView and get the id of the clicked item. When I click on the autocomplete filtered set output, I want to populate a list underneath the autocompletion box, which I also managed to get to work.
Done so far:
autocomplete works well for simple ArrayList, all data filtered
correct
onItemClick event fires properly after click
parent.getItemAtPosition(position) returns correct String
representation of the clicked item
The event onItemClick(AdapterView parent, View v, int position, long id) does not behave as I would like. How can I figure out the unfiltered array position of the clicked item? The position of the filtered one is the one I am not interested in.
Further questions:
How to handle HashMaps or Collections in AutoCompleteTextView
How to get the right itemId in the onItemClick event
I did very extensive research on this issue, but did not find any valuable information which would answer my questions.

The event onItemClick(AdapterView parent, View v, int position, long
id) does not behave as I would like.
This is a normal situation when filtering an adapter. Although the adapter keeps a reference to the initial unfiltered data from its point of view it has a single set of data on which is based(no matter if is the initial one or resulted from a filter operation). But this shouldn't raise any problems. With the default sdk adapters(or with a subclass), in the onItemClick() you get the position for the current list on which the adapter is based. You could then use getItem() to get data item for that position(again it doesn't matter if initial or filtered).
String data = getItem(position);
int realPosition = list.indexOf(data); // if you want to know the unfiltered position
this will work for lists and Maps(assuming that you use the SimpleAdapter). And for a Maps you always have the option of adding an additional key to set the unfiltered position in the initial list.
If you use your own adapter along with an AutoCompleteTextView you could make the onItemClick() give you the right id(the position however you can't change).
public class SpecialAutoComplete extends AutoCompleteTextView {
public SpecialAutoComplete(Context context) {
super(context);
}
#Override
public void onFilterComplete(int count) {
// this will be called when the adapter finished the filter
// operation and it notifies the AutoCompleteTextView
long[] realIds = new long[count]; // this will hold the real ids from our maps
for (int i = 0; i < count; i++) {
final HashMap<String, String> item = (HashMap<String, String>) getAdapter()
.getItem(i);
realIds[i] = Long.valueOf(item.get("id")); // get the ids from the filtered items
}
// update the adapter with the real ids so it has the proper data
((SimpleAdapterExtension) getAdapter()).setRealIds(realIds);
super.onFilterComplete(count);
}
}
and the adapter:
public class SimpleAdapterExtension extends SimpleAdapter {
private List<? extends Map<String, String>> mData;
private long[] mCurrentIds;
public SimpleAdapterExtension(Context context,
List<? extends Map<String, String>> data, int resource,
String[] from, int[] to) {
super(context, data, resource, from, to);
mData = data;
}
#Override
public long getItemId(int position) {
// this will be used to get the id provided to the onItemClick callback
return mCurrentIds[position];
}
#Override
public boolean hasStableIds() {
return true;
}
public void setRealIds(long[] realIds) {
mCurrentIds = realIds;
}
}
If you also implement the Filter class for the adapter then you could get the ids from there without the need to override the AutoCompleTextView class.

Using the Luksprog approach, I made some similar with ArrayAdapter.
public class SimpleAutoCompleteAdapter extends ArrayAdapter<String>{
private String[] mData;
private int[] mCurrentIds;
public SimpleAutoCompleteAdapter(Context context, int textViewResourceId,
String[] objects) {
super(context, textViewResourceId, objects);
mData=objects;
}
#Override
public long getItemId(int position) {
String data = getItem(position);
int index = Arrays.asList(mData).indexOf(data);
/*
* Atention , if your list has more that one same String , you have to improve here
*/
// this will be used to get the id provided to the onItemClick callback
if (index>0)
return (long)mCurrentIds[index];
else return 0;
}
#Override
public boolean hasStableIds() {
return true;
}
public void setRealIds(int[] realIds) {
mCurrentIds = realIds;
}
}

Implement onItemClickListener for AutoCompleteTextView, then use indexOf on your list to find the index of selected item.
actvCity.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
int index = cityNames.indexOf(actvCity.getText().toString());
// Do Whatever you want to do ;)
}
});

First add your data into custom arraylist
// mList used for adding custom data into your model
private List<OutletListSRModel> mList = new ArrayList<>();
// listdata used for adding string data for auto completing.
ArrayList<String> listdata = new ArrayList<String>();
for (int i = 0; i < JArray.length(); i++) {
JSONObject responseJson = JArray.getJSONObject(i);
OutletListSRModel mModel = new OutletListSRModel();
mModel.setId(responseJson.getString("id"));
mModel.name(responseJson.getString("outlet_name"));
listdata.add(responseJson.getString("outlet_name"));
}
ArrayAdapter adapter = new
ArrayAdapter(getActivity(),
android.R.layout.simple_list_item_1, listdata);
searchOutletKey.setAdapter(adapter);
Now for getting any value from model which we added above. we can get like this.
searchOutletKey.setOnItemClickListener ( new AdapterView.OnItemClickListener ( ) {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String txtOutletId = mOutletListSRModel.get(position).getId();
}
});