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checkbox in listview doesn't save status when scrolling Android

I have a list view from SQLite with checkboxes ..
It is all working fine , but when I click on one or more checkboxes and change their status then scroll down .. the checkbox status changes back to the original value (when the listview first created)
here is my code .. hope you can tell me how to solve it :
public void showSQL(){
/*
* Open the same SQLite database
* and read all it's content.
*/
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
Cursor cursor = mySQLiteAdapter.queueAll();
startManagingCursor(cursor);
from = new String[]{SQLiteAdapter.NUMBER_CONTENT};
to = new int[]{R.id.text};
SimpleCursorAdapter cursorAdapter =
new SimpleCursorAdapter(this, R.layout.row, cursor, from , to);
cursorAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder(){
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
String number ;
String is_star ;
if (columnIndex == cursor.getColumnIndex("numbers")) {
// If the column is IS_STAR then we use custom view.
number = cursor.getString(1);
is_star = cursor.getString(cursor.getColumnIndex("status"));
if (is_star.equals("true")) {
// set the visibility of the view to GONE
((CheckBox) view).setText(" " + number);
((CheckBox) view).setChecked(true);
return true;
}else{
((CheckBox) view).setText(" " + number);
((CheckBox) view).setChecked(false);
return true;
}
//return true;
}
return false;
}
});
stopManagingCursor(cursor);
listContent.setAdapter(cursorAdapter);
listContent.setOnItemClickListener(listContentOnItemClickListener);
mySQLiteAdapter.getAllNumbers();
mySQLiteAdapter.close();
}
private ListView.OnItemClickListener listContentOnItemClickListener
= new ListView.OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
Cursor cursor = (Cursor) parent.getItemAtPosition(position);
int item_id = cursor.getInt(cursor.getColumnIndex(SQLiteAdapter.NUMBER_ID));
String item_content1 = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.NUMBER_CONTENT));
mySQLiteAdapter = new SQLiteAdapter(getBaseContext());
item = (CheckBox) view;
mySQLiteAdapter.openToRead();
String check = null;
Cursor c = mySQLiteAdapter.getNumberStatus(item_id);
if (c.moveToFirst()){
check = c.getString(c.getColumnIndex(SQLiteAdapter.NUMBER_STATUS));
}
mySQLiteAdapter.close();
//The change color logic is here!
if(item.isChecked()) {
mySQLiteAdapter.openToWrite();
mySQLiteAdapter.updateNumberStatus(item_id,"false");
mySQLiteAdapter.close();
// Toast.makeText(MainActivity.this, "deleted" +" "+ check, Toast.LENGTH_LONG).show();
item.setChecked(false);
}
else {
mySQLiteAdapter.openToWrite();
mySQLiteAdapter.updateNumberStatus(item_id,"true");
mySQLiteAdapter.close();
// Toast.makeText(MainActivity.this, item_content1 +" "+ check , Toast.LENGTH_LONG).show();
item.setChecked(true);
}
}};

The issue with CheckBox inside ListView is that the view gets recycled due to recycling of view.
To, maintain the state to CheckBox there has to be something that can store the state of Checkbox.
Refer this link,it is very nice example explained here.
Link 1

You have to make a class to get and set state of checkbox . that will be used as arraylist to save state of checkbox. and use it to show checked item.

Android - Wanting to alternate icon images in a listview using cursorLoader

I have an application that displays a listView of contacts sorted by Last, then first names. Beside each contact is an image (icon). There are 3 kinds of contacts for which I'd like to display 3 different images (customers/suppliers/other) I have a default image now that is set to customer. I'm wondering if there's a way using the cusorLoader shown below to alternate images on the fly, or whether it would just be best to add a method involving a cursor in my onResume. (onResume is called each time I need to display the images). I believe simpleCursorAdapter can only take textViews as args, so if it's possible, maybe a compound textview/image would work. My icons are not stored in the database, just in the drawables.
Thanks in advance for any replies.
#Override
protected void onResume() {
super.onResume();
//Starts a new or restarts an existing Loader in this manager
getLoaderManager().restartLoader(0, null, this);
}
/*
* The fillData method binds the simpleCursorAadapter to the listView.
*/
private void fillData() {
String[] from = new String[] { ContactsDB.COLUMN_LAST_NAME, ContactsDB.COLUMN_FIRST_NAME };
//The XML views that the data will be bound to:
int[] to = new int[] {R.id.label2, R.id.label};
getLoaderManager().initLoader(0, null, this);
adapter = new SimpleCursorAdapter(this, R.layout.contact_row, null, from,
to, 0);
setListAdapter(adapter);
}
// Sort the names by last name, then by first name
String orderBy = ContactsDB.COLUMN_LAST_NAME + " COLLATE NOCASE ASC"
+ "," + ContactsDB.COLUMN_FIRST_NAME + " COLLATE NOCASE ASC" ;
// Creates a new loader after the initLoader () call
#Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
String[] projection = { ContactsDB.ROW_ID, ContactsDB.COLUMN_LAST_NAME, ContactsDB.COLUMN_FIRST_NAME };
CursorLoader cursorLoader = new CursorLoader(this,
SomeContentProvider.CONTENT_URI, projection, null, null, orderBy);
return cursorLoader;
}
#Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
// Swap the new cursor in.
// (The framework will take care of closing the old cursor once we return.)
adapter.swapCursor(data); //Call requires Min API 11
}
#Override
public void onLoaderReset(Loader<Cursor> loader) {
// This is called when the last Cursor provided to onLoadFinished()
// above is about to be closed.
// Data is no longer available, delete the reference
adapter.swapCursor(null);
}
}

Here is the code I use to dynamically show a drawable on a ListView, you have to use the function setViewBinder on your adapter:
mAdapter.setViewBinder(new ViewBinder() {
public boolean setViewValue(View aView, Cursor aCursor, int aColumnIndex) {
//Modification of the icon to display in the list
if (aColumnIndex == aCursor.getColumnIndex(DatabaseHandler.RATE_EMOTION)) {
int emotionID = aCursor.getInt(aColumnIndex);
Drawable emotionDrawable = resources.getDrawable(R.drawable.ic_unknown_rate);
//if emotion is set
if(emotionID > 0){
String emotionDrawablePath = "ic_smi" + emotionID;
int emotionDrawableID = resources.getIdentifier(emotionDrawablePath,"drawable", getPackageName());
//if a drawable is found
if(emotionDrawableID > 0){
emotionDrawable = resources.getDrawable(emotionDrawableID);
}
}
ImageView emotionImage = (ImageView) aView;
emotionImage.setImageDrawable(emotionDrawable);
return true;
}
return false;
}
});
You can see in this example that I change the drawable according to the data I get from the cursor for every row.

Android changing XML layout Changes data fields

Here's a head scratcher...(at least for me)
I have a contact list that displays a list of contacts from my Db. When a user clicks on one of the contacts an edit activity comes up. It all works perfectly as laid out currently, but I need to have the edit activity display the last name entry before the first name. Thinking that all the fields should have a one to one relationship, I went ahead and moved the editText(XML) for the last name above the first name in the edit activity thinking that this should be referenced by the id of the EditText. After doing so, the program is now displaying the first name in the last name field and vise-versa. I have tried wiping the user data on the emulator with no difference. I already realize this is probably one of those UH-DUH! type questions, but if anyone can point out the obvious for me, it would be appreciated. All the code shown is in the now-working state:
I've removed some chunks that would have nothing to do with my issue.
Thanks to anyone having a look at this for me!
Ken
XML:
<EditText
android:id="#+id/contact_edit_first_name"
android:inputType="textPersonName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:hint="#string/contact_edit_first_name"
android:imeOptions="actionNext"
android:background="#color/warn" >
</EditText>
<EditText
android:id="#+id/contact_edit_last_name"
android:inputType="textPersonName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="top"
android:hint="#string/contact_edit_last_name"
android:imeOptions="actionNext"
android:background="#color/warn" >
</EditText>
This is the contact activity that displays the listView rows, and calls
createContact which sends an intent to add, edit or delete rows.
public class ContactsActivity extends ListActivity implements
LoaderManager.LoaderCallbacks<Cursor> {
private SimpleCursorAdapter adapter;
/** Called when the activity is first created. */
#Override
public void onCreate //DO THE ON CREATE STUFF -removed
fillData();
registerForContextMenu(getListView());
Button add_contact = (Button) findViewById(R.id.add_contact_button);
add_contact.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
createContact();
}
});
}
// Create the options menu to INSERT from the XML file
// removed - not relevant
// return true for the menu to be displayed
}
// When the insert menu item is selected, call CreateContact
//Removed
createContact();
return true;
}
return super.onOptionsItemSelected(item);
}
private void createContact() {
Intent i = new Intent(this, ContactEditActivity.class);
startActivity(i);
}
//The onListItemClick sends a URI which flags the contactEditActivity
//that this is an edit rather than a new insert.
#Override
protected void onResume() {
super.onResume();
//Starts a new or restarts an existing Loader in this manager
getLoaderManager().restartLoader(0, null, this);
}
//The fillData method binds the simpleCursorAadapter to the listView.
private void fillData() {
//The desired columns to be bound:
String[] from = new String[] { ContactsDB.COLUMN_LAST_NAME, ContactsDB.COLUMN_FIRST_NAME };
//The XML views that the data will be bound to:
int[] to = new int[] {R.id.label2, R.id.label};
// The creation of a loader using the initLoader method call.
getLoaderManager().initLoader(0, null, this);
adapter = new SimpleCursorAdapter(this, R.layout.contact_row, null, from,
to, 0);
setListAdapter(adapter);
}
// Sort the names by last name, then by first name
String orderBy = ContactsDB.COLUMN_LAST_NAME + " COLLATE NOCASE ASC"
+ "," + ContactsDB.COLUMN_FIRST_NAME + " COLLATE NOCASE ASC" ;
// Creates a new loader after the initLoader () call
#Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
//ETC
}
#Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
adapter.swapCursor(data); //Call requires Min API 11
}
#Override
public void onLoaderReset(Loader<Cursor> loader) {
// swap the cursor adapter
}
And Finally, this is the contact edit code that is likely the source of my grief...maybe not. Could be the save state doesn't map to the id's?
#Override
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.activity_contact_edit);
Log.i(TAG, "INSIDE ONCREATE");
mCategory = (Spinner) findViewById(R.id.category);
mLastName = (EditText) findViewById(R.id.contact_edit_last_name);
mFirstName = (EditText) findViewById(R.id.contact_edit_first_name);
mHomePhone = (EditText) findViewById(R.id.contact_edit_home_phone);
mCellPhone = (EditText) findViewById(R.id.contact_edit_cell_phone);
//****************ECT. ETC.
//DECLARE THE BUTTONS AND SET THE DELETE ENABLED FALSE - REMOVED - NOT PERTINANT
Bundle extras = getIntent().getExtras();
// Check if the URI is from a new instance or a saved record
}
// Set the save button to check the required fields, save the contact and finish
saveButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if (TextUtils.isEmpty(mLastName.getText().toString()) ||
TextUtils.isEmpty(mFirstName.getText().toString())) {
makeToast();
} else {
setResult(RESULT_OK);
finish();
}
}
});
// Set the delete button to delete the contact and finish - REMOVED - NOT PERTINANT
private void fillData(Uri uri) {
// QUERY PARAMETER projection - A list of which columns to return.
// Passing null will return all columns, which is inefficient (but used now!)
// null, null and null are: selection, selection args, and sort order for specific items
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
if (cursor != null) {
cursor.moveToFirst();
String category = cursor.getString(cursor
.getColumnIndexOrThrow(ContactsDB.COLUMN_CATEGORY));
for (int i = 0; i < mCategory.getCount(); i++) {
String s = (String) mCategory.getItemAtPosition(i);
Log.i("CATEGORY", s); ////////////////////////////////////////////
if (s.equalsIgnoreCase(category)) {
mCategory.setSelection(i);
}
};
mLastName.setText(cursor.getString(cursor
.getColumnIndexOrThrow(ContactsDB.COLUMN_LAST_NAME)));
mFirstName.setText(cursor.getString(cursor
.getColumnIndexOrThrow(ContactsDB.COLUMN_FIRST_NAME)));
mHomePhone.setText(cursor.getString(cursor
.getColumnIndexOrThrow(ContactsDB.COLUMN_PHONE_NUMBER)));
mCellPhone.setText(cursor.getString(cursor
.getColumnIndexOrThrow(ContactsDB.COLUMN_CELL_NUMBER)));
mWorkPhone.setText(cursor.getString(cursor
.getColumnIndexOrThrow(ContactsDB.COLUMN_WORK_NUMBER)));
mFax.setText(cursor.getString(cursor
//****************ECT. ETC.
//close the cursor
}
}
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
saveState();
outState.putParcelable(whateverContentProvider.CONTENT_ITEM_TYPE, contactUri);
}
#Override
protected void onPause() {
super.onPause();
saveState();
}
private void saveState() {
String category = (String) mCategory.getSelectedItem();
String someLAST = mLastName.getText().toString().valueOf(findViewById(R.id.contact_edit_last_name));
String lastName = mLastName.getText().toString();
String firstName = mFirstName.getText().toString();
String someFIRST = mFirstName.getText().toString().valueOf(findViewById(R.id.contact_edit_first_name));
String homePhone = mHomePhone.getText().toString();
String somePhone = mHomePhone.getText().toString().valueOf(findViewById(R.id.contact_edit_home_phone));
String cellPhone = mCellPhone.getText().toString();
String workPhone = mWorkPhone.getText().toString();
//****************ECT. ETC.
//Some logging I used to show that the first name field still came up first
//after changing the order of the editTexts.
Log.i("LAST NAME", lastName);
Log.i("SOME LAST", someLAST);
Log.i("FIRST NAME", firstName);
Log.i("SOME FIRST", someFIRST);
Log.i("Home Phone", homePhone);
Log.i("SOME PHONE", somePhone);
// Save if first name and last name are entered
// The program will save only last name when a user presses back button with text in last name
if (lastName.length() == 0 || firstName.length() == 0) {
return;
}
// ContentValues class is used to store a set of values that the contentResolver can process.
ContentValues values = new ContentValues();
values.put(ContactsDB.COLUMN_CATEGORY, category);
values.put(ContactsDB.COLUMN_LAST_NAME, lastName);//ANNIE
values.put(ContactsDB.COLUMN_FIRST_NAME, firstName);
values.put(ContactsDB.COLUMN_PHONE_NUMBER, homePhone);
//****************ECT. ETC.
if (contactUri == null) {
// Create a new contact
contactUri = getContentResolver().insert(whateverContentProvider.CONTENT_URI, values);
} else {
// Update an existing contact
getContentResolver().update(contactUri, values, null, null);
}
}
//MAKE A TOAST DOWN HERE - REMOVED - NOT PERTINANT
}

Have you tried cleaning the project (regenerating de R).
Also, try restarting your IDE.
This may seem stupid but actually can solve the issue...

try cleaning your project. Weird things happen sometimes within Eclipse.

SimpleCursorAdapter remove values

I have a ListView on each row i have a LinearLayout with some objects in it (mostly some TextViews).
This ListView i fill it dynamically from a cursor. In this cursor i have one value true or false.
I want to hide or make non clickable the lines with value false. I try this code but doesn't work
public void contentProviderInitialized(final Cursor cursor) {
SimpleCursorAdapter commonTickets = new SimpleCursorAdapter(MyClass.this,
R.layout.row_ticketing, cursor, new String[] {"price", "productName", "stopName" },
new int[] { R.id.ticketing_price, R.id.ticketing_product, R.id.ticketing_stop_name }
) {
#Override
public void bindView(View view, Context context, Cursor cursor) {
String enabledStr = cursor.getString(cursor.getColumnIndex("enabled"));
String product = cursor.getString(cursor.getColumnIndex("productName"));
boolean enabled = Boolean.parseBoolean(enabledStr);
LinearLayout ticketingRow = (LinearLayout) view.findViewById(R.id.ticketing_row);
if (enabled) {
ticketingRow.setEnabled(true);
} else {
ticketingRow.setEnabled(false);
}
super.bindView(view, context, cursor);
};
MyClass.this.ticketing_list_view.setAdapter(commonTickets);
}
}

Override isEnabled on the adapter
http://developer.android.com/reference/android/widget/BaseAdapter.html#isEnabled(int)
This answer seems to hint at it. Use movetoposition on the cursor. It sounds like the performance would be bad with that, though, so you might want to do some caching of true/false values based on numeric position? Try it out. See how it goes. The caching might be a waste.

This was a great help to try another aproach:
Android - how to delete item from a cursor?
Add the positions you want to see to a new MatrixCursor and swap your Cursor to the new Matrix Cursor

How do I implement autocomplete with cursoradapter

I have an SQLite database containing 2 tables 4000+ rows each used for autocomplete. I saw very simple examples that use an array of strings to provide autocomplete or they use the list of contacts to do the same. Obviously none of these work in my case. How do I use my own SQLite database with my own autocomplete data, for the autocomplete. Do I have to create content providers? How? Please give me some examples because I couldn't find any. I have managed to override SQLiteOpenHelper to copy the database from the assets folder to the /data/data/MY_PACKAGE/databases/ folder on the android. I have created a custom CursorAdapter that uses my custom SQLiteOpenHelper and returns a cursor from runQueryOnBackgroundThread. I get strange errors about some _id column missing. I have added the _id column to my tables. I also don't understand what is the Filterable interface doing and when does my data get filtered. What methods/classes do I need to override? Thanks.

It works.
You need the SQLiteOpenHelper from here. You basically have to copy your database into a specific folder from your assets folder. Then you need a custom CursorAdapter that uses your custom SQLiteOpenHelper.
Here is the onCreate method for my activity.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search);
KeywordsCursorAdapter kwadapter = new KeywordsCursorAdapter(this, null);
txtKeyword = (AutoCompleteTextView)this.findViewById(R.id.txtKeyword);
txtKeyword.setAdapter(kwadapter);
txtCity = (AutoCompleteTextView)this.findViewById(R.id.txtCity);
btnSearch = (Button)this.findViewById(R.id.btnSearch);
btnSearch.setOnClickListener(this);
}
Here is the cursoradapter. You can pass null for cursor when constructing.
public class KeywordsCursorAdapter extends CursorAdapter {
private Context context;
public KeywordsCursorAdapter(Context context, Cursor c) {
super(context, c);
this.context = context;
}
//I store the autocomplete text view in a layout xml.
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.keyword_autocomplete, null);
return v;
}
#Override
public void bindView(View view, Context context, Cursor cursor) {
String keyword = cursor.getString(cursor.getColumnIndex("keyword"));
TextView tv = (TextView)view.findViewById(R.id.txtAutocomplete);
tv.setText(keyword);
}
//you need to override this to return the string value when
//selecting an item from the autocomplete suggestions
//just do cursor.getstring(whatevercolumn);
#Override
public CharSequence convertToString(Cursor cursor) {
//return super.convertToString(cursor);
String value = "";
switch (type) {
case Keywords:
value = cursor.getString(DatabaseHelper.KEYWORD_COLUMN);
break;
case Cities:
value = cursor.getString(DatabaseHelper.CITY_COLUMN);
break;
}
return value;
}
#Override
public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
//return super.runQueryOnBackgroundThread(constraint);
String filter = "";
if (constraint == null) filter = "";
else
filter = constraint.toString();
//I have 2 DB-s and the one I use depends on user preference
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
//String selectedCountryCode = prefs.getString("selectedCountry", "GB");
String selectedCountryCode = prefs.getString(context.getString(R.string.settings_selected_country), "GB");
selectedCountryCode += "";
//Here i have a static SQLiteOpenHelper instance that returns a cursor.
Cursor cursor = MyApplication.getDbHelpers().get(selectedCountryCode.toLowerCase()).getKeywordsCursor(filter);
return cursor;
}
}
Here is the part that returns the cursor: it's just a select with a like condition.
public class DatabaseHelper extends SQLiteOpenHelper {
...
public synchronized Cursor getKeywordsCursor (String prefix) {
if (database == null) database = this.getReadableDatabase();
String[] columns = {"_id", "keyword"};
String[] args = {prefix};
Cursor cursor;
cursor = database.query("keywords", columns, "keyword like '' || ? || '%'", args, null, null, "keyword", "40");
int idcol = cursor.getColumnIndexOrThrow("_id");
int kwcol = cursor.getColumnIndexOrThrow("keyword");
while(cursor.moveToNext()) {
int id = cursor.getInt(idcol);
String kw = cursor.getString(kwcol);
Log.i("keyword", kw);
}
cursor.moveToPosition(-1);
return cursor;
}
...
}
You can also create a custom content provider but in this case it would be just another useless class you need to override.