Develop Reference

ListView.getItemAtPosition always return 0

I am creating a contact application that works with SQLite database and I face a problem when I try to pass the id of the contact to another intent to use it in a query.
Here is my code :
MainActivity.java
public class MainActivity extends AppCompatActivity {
ListView contactsList;
DbContact dbContact;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactsList = findViewById(R.id.contactList);
dbContact = new DbContact(this);
contactsList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent intent = new Intent(MainActivity.this, update_contact.class);
Contact selected_contact =(Contact) contactsList.getItemAtPosition(i);
Toast.makeText(MainActivity.this, "ths position is " +selected_contact.getId(), Toast.LENGTH_SHORT).show();
/*intent.putExtra("id", selected_contact.getId());
startActivity(intent);*/
}
});
}
}
update_contact.java:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_update_contact);
int id = getIntent().getIntExtra("id",0);
db = new DbContact(this);
editName = (EditText) findViewById(R.id.editName);
editPhone = (EditText) findViewById(R.id.editPhone);
btnUpdate = (Button) findViewById(R.id.btnUpdate);
Contact contact = db.getContactById(id);
editName.setText(contact.getName());
editPhone.setText(contact.getPhone());
}
BdContact :
public DbContact(#Nullable Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
#Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
String create_table = "create table "+TABLE_CONTACTS+"("+KEY_ID+" int primary key AUTOINCREMENT, "+KEY_NAME+" varchar(30), "+KEY_PHONE+" varchar(30))";
sqLiteDatabase.execSQL(create_table);
}
#Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
String delete_table = "DROP TABLE IF EXISTS "+TABLE_CONTACTS;
sqLiteDatabase.execSQL(delete_table);
onCreate(sqLiteDatabase);
}
public void addContact(Contact contact){
SQLiteDatabase db = getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, contact.getName());
values.put(KEY_PHONE, contact.getPhone());
db.insert(TABLE_CONTACTS, null, values);
}
public ArrayList<Contact> getAllContacts(){
ArrayList<Contact> contacts = new ArrayList<>();
String selectAll_query = "select * from "+ TABLE_CONTACTS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectAll_query, null);
if(cursor.moveToFirst()){
do{
int id = cursor.getInt(cursor.getColumnIndexOrThrow(KEY_ID));
String name = cursor.getString(cursor.getColumnIndexOrThrow(KEY_NAME));
String phone = cursor.getString(cursor.getColumnIndexOrThrow(KEY_PHONE));
Contact contact = new Contact(id,name, phone);
contacts.add(contact);
}while(cursor.moveToNext());
}
cursor.close();
db.close();
return contacts;
}
public Contact getContactById(int id_contact){
Contact contact = null;
SQLiteDatabase db = this.getReadableDatabase();
String select_query = "select * from "+TABLE_CONTACTS+" where id = " + id_contact;
Cursor cursor = db.rawQuery(select_query, null);
if(cursor.moveToFirst()){
int id = cursor.getInt(cursor.getColumnIndexOrThrow(KEY_ID));
String name = cursor.getString(cursor.getColumnIndexOrThrow(KEY_NAME));
String phone = cursor.getString(cursor.getColumnIndexOrThrow(KEY_PHONE));
contact = new Contact(id, name, phone);
}
return contact;
}
I think that the problem is in the database because I suspect the id didn't auto-incremented
Thank you guys for helping me solve this issue

Have you added the position?
listView.getItemAtPosition(position)

Problem with inserting new record to sqlite in android studio

I want to insert a new record into a sqlite db.
My table is called words. It has the columns id, word, meaning, details, lesson, ticks.
When I try to insert a new record, it just saves details as word and lesson as meaning, whereas details and lesson are stored with a null value.
The autoincrement primary key id and ticks are stored correctly.
Code
Handler:
public class DatabaseHandler extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
protected static final String DATABASE_NAME = "wordDatabase";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
String sql = "CREATE TABLE words " +
"( id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"word TEXT, " +
"meaning TEXT, " +
"details TEXT, " +
"lesson TEXT, " +
"ticks INTEGER ) ";
db.execSQL(sql);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
String sql = "DROP TABLE IF EXISTS words";
db.execSQL(sql);
onCreate(db);
}
Object:
public class ObjectStudent {
int id;
String word;
String meaning;
String details;
String lesson;
int ticks;
public ObjectStudent(){
}
OnClickListener:
public class OnClickeListenerCreateStudent implements View.OnClickListener {
#Override
public void onClick(View view) {
final Context context = view.getRootView().getContext();
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View formElementsView = inflater.inflate(R.layout.student_input_form, null, false);
final EditText et_word = (EditText) formElementsView.findViewById(R.id.et_word);
final EditText et_meaning = (EditText) formElementsView.findViewById(R.id.et_meaning);
final EditText et_details = (EditText) formElementsView.findViewById(R.id.et_details);
final EditText et_lesson = (EditText) formElementsView.findViewById(R.id.et_lesson);
new AlertDialog.Builder(context)
.setView(formElementsView)
.setTitle("Create Word")
.setPositiveButton("Add",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
String wordTitle = et_word.getText().toString();
String wordMeaning = et_meaning.getText().toString();
String wordDetails = et_details.getText().toString();
String wordLesson = et_lesson.getText().toString();
ObjectStudent objectStudent = new ObjectStudent();
/* objectStudent.word= wordTitle;
objectStudent.meaning= wordMeaning;
objectStudent.details= wordDetails;
objectStudent.lesson= wordLesson;*/
objectStudent.word = "word"; // et_word.getText().toString();
objectStudent.meaning = "meaning"; // et_meaning.getText().toString();
objectStudent.details = "details"; // et_details.getText().toString();
objectStudent.lesson = "lesson"; // et_lesson.getText().toString();
objectStudent.ticks= 1;
boolean createSuccessful = new TableControllerStudent(context).create(objectStudent);
if(createSuccessful){
Toast.makeText(context, "Word information was saved.", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(context, "Unable to save Word information.", Toast.LENGTH_SHORT).show();
}
((MainActivity) context).countRecords();
((MainActivity) context).readRecords();
dialog.cancel();
}
}).show();
}
Create method on TableControllerStudent class:
public class TableControllerStudent extends DatabaseHandler {
public TableControllerStudent(Context context) {
super(context);
}
public boolean create(ObjectStudent objectStudent) {
ContentValues values = new ContentValues();
/* values.put("word", objectStudent.word);
values.put("meaning", objectStudent.meaning);
values.put("details", objectStudent.details);
values.put("lesson", objectStudent.lesson);*/
values.put("word", "w");
values.put("meaning", "m");
values.put("details", "d");
values.put("lesson", "l");
values.put("ticks", objectStudent.ticks);
SQLiteDatabase db = this.getWritableDatabase();
db.execSQL("INSERT INTO " + "words "+ "(word, meaning,details, lesson, ticks ) VALUES ('word','meaning','details','lesson',2)");
//boolean createSuccessful = db.insert("words", null, values) > 0;
db.close();
//return createSuccessful;
return true;
}

Just update Database version to higher version(instead of 1,use 5).And check it.before run the application ,please uninstall and then run.

Use
db.insert(YOUR_TABLE_NAME,values);
instead of
db.execSQL() function

App is getting crashed when I'm trying to delete Data from database and refreshing ListView

I'm learning android programming and trying to delete data from database using a button in custom ListView but, unfortunately, my App is getting crashed when I hit Yes On Alert DialogBox.
FenceActivity
public class FenceActivity extends AppCompatActivity {
List<Fence> fenceList;
SQLiteDatabase sqLiteDatabase;
ListView listViewFences;
FenceAdapter fenceAdapter;
DataBaseHelper dataBaseHelper;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.savedfences);
listViewFences = findViewById(R.id.fencesListView);
fenceList = new ArrayList<>();
showFencesFromDatabase();
}
public void showFencesFromDatabase() {
dataBaseHelper = new DataBaseHelper(this);
Cursor cursor = dataBaseHelper.getAllData();
if (cursor.moveToFirst()) {
do {
fenceList.add(new Fence(cursor.getInt(0), cursor.getDouble(1), cursor.getDouble(2), cursor.getInt(3)));
} while (cursor.moveToNext());
}
cursor.close();
fenceAdapter = new FenceAdapter(FenceActivity.this, R.layout.list_layout_fences, fenceList);
listViewFences.setAdapter(fenceAdapter);
}
public void reloadFencesFromDatabase() {
dataBaseHelper = new DataBaseHelper(this);
Cursor cursor = dataBaseHelper.getAllData();
if (cursor.moveToFirst()) {
fenceList.clear();
do {
fenceList.add(new Fence(cursor.getInt(0), cursor.getDouble(1), cursor.getDouble(2), cursor.getInt(3)));
} while (cursor.moveToNext());
}
cursor.close();
fenceAdapter = new FenceAdapter(FenceActivity.this, R.layout.list_layout_fences, fenceList);
listViewFences.setAdapter(fenceAdapter);
}
}
ShowFencesFromDatabase method I'm using to get Data from the database.
FenceAdapter
public class FenceAdapter extends ArrayAdapter<Fence> {
Context context;
int listLayoutRes;
List<Fence> fenceList;
DataBaseHelper dataBaseHelper;
FenceActivity fenceActivity;
public FenceAdapter(Context context, int listLayoutRes, List<Fence> fenceList) {
super(context, listLayoutRes, fenceList);
this.context = context;
this.listLayoutRes = listLayoutRes;
this.fenceList = fenceList;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.list_layout_fences, null);
}
final Fence fence = fenceList.get(position);
TextView textViewSno = convertView.findViewById(R.id.textViewSnoLabel);
TextView textViewLat = convertView.findViewById(R.id.textViewLatitudeValue);
TextView textViewLon = convertView.findViewById(R.id.textViewLongitudeValue);
TextView textViewRadi = convertView.findViewById(R.id.textViewRadiusValue);
textViewSno.setText(Integer.toString(fence.getSno()));
textViewLat.setText(String.valueOf(fence.getLat()));
textViewLon.setText(String.valueOf(fence.getLon()));
textViewRadi.setText(Integer.toString(fence.getRadius()));
Button buttonDel = convertView.findViewById(R.id.buttonDeleteFence);
buttonDel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Are you sure");
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dataBaseHelper = new DataBaseHelper(context);
fenceActivity = (FenceActivity)context;
dataBaseHelper.deleteDataById(fence);
fenceActivity.reloadFencesFromDatabase();
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
});
return convertView;
}
DatabaseHelper Class
public class DataBaseHelper extends SQLiteOpenHelper {
private static final String TAG = "DataBaseHelper";
public static final String DB_NAME = "FenceDatabase";
private static final String TABLE_NAME = "FenceData";
private static final String col1 = "Sno";
private static final String col2 = "Latitude";
private static final String col3 = "Longitude";
private static final String col4 = "Radius";
Context context;
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, 1);
this.context = context;
}
#Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
String createTable = "CREATE TABLE " + TABLE_NAME + " (" + col1 + " INTEGER PRIMARY KEY AUTOINCREMENT, " + col2 + " REAL , " + col3 + " REAL , " + col4 + " INTEGER)";
sqLiteDatabase.execSQL(createTable);
}
#Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(sqLiteDatabase);
}
public boolean addData(Double lat, Double lon, int radi) {
SQLiteDatabase sqLiteDatabase = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(col2, lat);
contentValues.put(col3, lon);
contentValues.put(col4, radi);
sqLiteDatabase.insert(TABLE_NAME, null, contentValues);
sqLiteDatabase.close();
return true;
}
public Cursor getAllData() {
String query = "SELECT * FROM " + TABLE_NAME;
SQLiteDatabase sqLiteDatabase = this.getReadableDatabase();
Cursor cursor = sqLiteDatabase.rawQuery(query, null);
return cursor;
}
public void deleteDataById(Fence fence) {
SQLiteDatabase sqLiteDatabase = this.getWritableDatabase();
String sql = "DELETE FROM FenceData WHERE Sno = ?";
sqLiteDatabase.execSQL(sql, new Integer[]{fence.getSno()});
}
}
Fence class
public class Fence {
int radius,sno;
double lat,lon;
public Fence( int sno,double lat, double lon,int radius) {
this.radius = radius;
this.sno = sno;
this.lat = lat;
this.lon = lon;
}
public int getRadius() {
return radius;
}
public int getSno() {
return sno;
}
public double getLat() {
return lat;
}
public double getLon() {
return lon;
}
}
Errors
2019-06-30 19:06:08.658 22783-22875/com.abhishakkrmalviya.fencetest E/LB: fail to open file: No such file or directory
2019-06-30 19:06:11.473 22783-22783/com.abhishakkrmalviya.fencetest E/SchedPolicy: set_timerslack_ns write failed: Operation not permitted
What steps should I take to make App work properly, I mean to delete data from the database?

Initialise dataBaseHelper = new DataBaseHelper(context); before invoking dataBaseHelper.deleteDataById();

The problem is within FenceAdapter.
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dataBaseHelper.deleteDataById();
fenceActivity.showFencesFromDatabase();
}
});
The problem is that dataBaseHelper is not initialized before its usege.
It can be solve by adding a line dataBaseHelper = new DataBaseHelper(context); at the end of adapter's constructor.

android custom layout for listview of sqlite database

i need to make custom layout for my list view where data source is a sqlite database
when i run this code my output Thus shows (name next to phone) but i need to display output like this (phone under
name)
this is my code
here public class MainActivity extends AppCompatActivity {
AlertDialog.Builder builder;
List<Todo> todos;
MyDataBase db = new MyDataBase(this);
String m,m1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText editText = (EditText) findViewById(R.id.editText);
final EditText editText1 = (EditText) findViewById(R.id.editText2);
Button button = (Button) findViewById(R.id.button);
ListView listView = (ListView) findViewById(R.id.listView);
todos = db.getallcontacts();
final ArrayAdapter adapter = new ArrayAdapter(this,R.layout.support_simple_spinner_dropdown_item,todos);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
m = editText.getText().toString();
m1 = editText1.getText().toString();
db.AddnewContact(new Todo(m, m1));
adapter.add(new Todo(m, m1));
Toast.makeText(getApplicationContext(), "contact saved", Toast.LENGTH_LONG).show();
}
});
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
final int position, long rowId) {
AlertDialog.Builder adb = new AlertDialog.Builder(
MainActivity.this);
adb.setMessage("you need to delete this contact");
adb.setPositiveButton("delete", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Todo td = todos.get(position);
db.deleteContact(td);
adapter.remove(td);
}
});
adb.show();
adapter.notifyDataSetChanged();
}
});
listView.setAdapter(adapter);
}
my database calss
here public class MyDataBase extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "contactsManager";
// Contacts table name
private static final String TABLE_CONTACTS = "contacts";
// Contacts Table Columns names
private static final String KEY_ID = "id";
final String KEY_NAME = "name";
final String KEY_PH_NO = "phone_number";
public MyDataBase(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
+ KEY_PH_NO + " TEXT" + ")";
db.execSQL(CREATE_CONTACTS_TABLE);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public void AddnewContact (Todo todo)// this method to add new contact
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME,todo.getName());
values.put(KEY_PH_NO, todo.getPhoneNumber());
db.insert(TABLE_CONTACTS, null, values);
db.close();
}
public Todo getContact(int id)
{
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_CONTACTS,new String[] { KEY_ID,
KEY_NAME, KEY_PH_NO },KEY_ID + "=?",new String[] { String.valueOf(id) },null,null,null,null);
cursor.moveToFirst();
Todo contact = new Todo(Integer.parseInt(cursor.getString(0)),
cursor.getString(1), cursor.getString(2));
// return contact
return contact;
}
public List<Todo> getallcontacts()
{
List<Todo> contactList = new ArrayList<Todo>();
String selectQuery = "SELECT * FROM " + TABLE_CONTACTS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Todo contact = new Todo();
contact.setID(Integer.parseInt(cursor.getString(0)));
contact.setName(cursor.getString(1));
contact.setPhoneNumber(cursor.getString(2));
// Adding contact to list
contactList.add(contact);
} while (cursor.moveToNext());
}
// return contact list
return contactList;
}
public void deleteContact(Todo contact) {
int id = contact.getID();
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_CONTACTS, KEY_ID
+ " = " + id, null);
db.close();
}
public Cursor fetchAllCountries() {
SQLiteDatabase database = this.getWritableDatabase();
Cursor mCursor = database.query(TABLE_CONTACTS, new String[] {KEY_ID,
KEY_NAME,KEY_PH_NO},
null, null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
}
my todo calss
`enter public class Todo {
//private variables
int _id;
String _name;
String _phone_number;
// Empty constructor
public Todo(){
}
// constructor
public Todo(int id, String name, String _phone_number){
this._id = id;
this._name = name;
this._phone_number = _phone_number;
}
// constructor
public Todo(String name, String _phone_number){
this._name = name;
this._phone_number = _phone_number;
}
// getting ID
public int getID(){
return this._id;
}
// setting id
public void setID(int id){
this._id = id;
}
// getting name
public String getName(){
return this._name;
}
// setting name
public void setName(String name){
this._name = name;
}
// getting phone number
public String getPhoneNumber(){
return this._phone_number;
}
// setting phone number
public void setPhoneNumber(String phone_number){
this._phone_number = phone_number;
}
#Override
public String toString() {
return _name+" "+_phone_number;
}
}
`

cannot bind data from sqlliteData-base to simplecursoradaptor

I don´t know how to connect the data my array String [] station = {"København", "Grenaa", "Hanstholm"}; in my MyListActivity to the simpleCursorAdaptor
I have made a SQLitedatabase, a Helperclass and anActivityclass - but I get the error " java.lang.IllegalArgumentException: column 'København' does not exist". I have additional code - but this code should be sufficient I think.
Any help would really be appreciated.
public class MyListActivity extends ListActivity {
String [] station = {"København", "Grenaa", "Hanstholm"};
Cursor stations;
SQLiteDatabase db;
SimpleCursorAdapter cursorAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DBAdapter dbaAdapter = new DBAdapter(this);
dbaAdapter.open();
Cursor stations = dbaAdapter.getStations();
SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1,stations,station,new int [] {
android.R.id.text1
});
setListAdapter(cursorAdapter);
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Cursor cursor = (Cursor) l.getItemAtPosition(position);
String value = station[(int)id];
Intent intent = new Intent();
intent.putExtra(TravelActivity.SELECTED_STATION_NAME, cursor.getString(cursor.getColumnIndexOrThrow("station")));
this.setResult(RESULT_OK,intent);
cursor.close();
finish();
}
#Override
protected void onDestroy() {
db.close();
}
}
public class MyHelper extends SQLiteOpenHelper {
public static final String DB_NAME = "database";
String DESTINATION = "DESTINATION";
int version = 1;
public MyHelper(Context context) {
super(context, "travel.db", null, 1);
}
#Override
public void onCreate(SQLiteDatabase db) {
String TRAVELS = ( "create table travels (_id integer primary key autoincrement, start text, slut text)");
String STATIONS = ( "create table stations (_id integer primary key autoincrement, start text)" );
db.execSQL(TRAVELS);
db.execSQL(STATIONS);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS ");
onCreate(db);
}
}
public class DBAdapter {
MyHelper myHelper;
SQLiteDatabase db;
String TABLE_STATIONS = "stations";
String TABLE_TRAVELS = "travels";
String START = "start";
String SLUT = "slut";
String ID_COL = "_id";
Context context;
public static final int NUMBER_TRAVELS = 1;
public DBAdapter(Context context) {
this.context = context;
myHelper = new MyHelper(context);
}
public void open() {
db = myHelper.getWritableDatabase();
}
public void close() {
myHelper.close();
}
public Cursor getTravels() {
Cursor cursor = db.query(TABLE_TRAVELS,new String[]{ID_COL,START,SLUT},null,null,null,null,START);
return cursor;
}
public void saveTravels(String start, String slut) {
ContentValues values = new ContentValues();
values.put(START,start);
values.put(SLUT,slut);
db.insert(TABLE_TRAVELS,null,values);
}
public Cursor getStations() {
Cursor cursor = db.query(TABLE_STATIONS,new String[]{ID_COL,START},null,null,null,null,START);
return cursor;
}
public void saveStations(String start) {
ContentValues values = new ContentValues();
values.put(START,start);
db.insert(TABLE_TRAVELS,null,values);
}
}

The error is generated by your SimpleCursorAdapter constructor :
SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_1,stations,station,new int [] {
android.R.id.text1
});
The 4td parameter is the column names, so a String array with START and/or SLUT values in your case.