I am trying to populate my AutoCompleteTextView from a column of values in my database.
The query I am running in my database is:
// GET MEMOS
public ArrayList<String> autoCompleteMemo(String table)
{
SQLiteDatabase db = this.getReadableDatabase();
ArrayList<String> memoList = new ArrayList<String>();
String SQL_GET_MEMOS = "SELECT memo FROM " + table;
Cursor cursor = db.rawQuery(SQL_GET_MEMOS, null);
cursor.moveToFirst();
if (!cursor.isAfterLast()) {
do {
memoList.add(cursor.getString(0));
}
while (cursor.moveToNext());
}
cursor.close();
db.close();
return memoList;
}
And here is how I am attempting to set the values:
memoList = new String[db.autoCompleteMemo(table).size()];
ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1, memoList);
etMemo.setAdapter(adapter);
For some reason, this does not appear to be working. Am i converting from ArrayList to String[] properly?
Thanks
Also,
If i do something similar to this
String[] memoList = getResources().getStringArray(R.array.memoList);
and populate that in Strings.xml it works fine.
I changed my DB method to the following and it now works
public String[] autoCompleteMemo(String table) {
SQLiteDatabase db = this.getReadableDatabase();
String SQL_GET_MEMOS = "SELECT memo FROM " + table;
Cursor cursor = db.rawQuery(SQL_GET_MEMOS, null);
if (cursor.getCount() > 0) {
String[] str = new String[cursor.getCount()];
int i = 0;
while (cursor.moveToNext()) {
str[i] = cursor.getString(cursor.getColumnIndex("memo"));
i++;
}
return str;
}
else {
return new String[] {};
}
}
Related
Experts,
As-Is
I am having application in which textview is displaying the database table count.Which keep change upon inserting the data in to the database table
And issue is changed data is appearing whenever i closed and reopen again only.
To-Be
Textview should show the count the moment data is inserted in to the table. Like auto refresh something like that. Could you assist.
my code is
String strData1 = "";
Cursor c = dbhndlr.getAllEntries();
if (c!= null) {
if (c.moveToFirst()) {
do {
strData1 += c.getString(0);
} while (c.moveToNext());
}
}
tex.setText(strData1);
String strData2 = "";
Cursor c1 = dbhndlr.getAllEntries1();
if (c1!= null) {
if (c1.moveToFirst()) {
do {
strData2 += c1.getString(0);
} while (c1.moveToNext());
}
}
tex1.setText(strData2);
DB
public Cursor getAllEntries(){
String selectQuery = "SELECT count (*) FROM " + TABLE_LABELS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cur = db.rawQuery(selectQuery, null);
return cur;
}
public Cursor getAllEntries1(){
String selectQuery = "SELECT count (*) FROM " + TABLE_LABELS2;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cur1 = db.rawQuery(selectQuery, null);
return cur1;
}
public List<String> getAllLabels1(){
List<String> labels = new ArrayList<String>();
// Select All Query
String selectQuery = "SELECT count (*) FROM " + TABLE_LABELS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor1 = db.rawQuery(selectQuery, null);
final ArrayList<String> row1 = new ArrayList<String>();
// looping through all rows and adding to list
if (cursor1.moveToFirst()) {
do {
labels.add(cursor1.getString(1));
} while (cursor1.moveToNext());
}
// closing connection
cursor1.close();
db.close();
// returning lables
return labels;
}
if i have same values in a column and i want to return only one instead of all of them what would be a method.
ArrayList<String> getAllNotes() {
Cursor cursor;
mDbHelper = mSqliteHelper.getWritableDatabase();
String query = "SELECT * FROM " + SqliteHelpers.TABLE_NAME;
cursor = mDbHelper.rawQuery(query, null);
ArrayList<String> arrayList = new ArrayList<>();
while (cursor.moveToNext()) {
String itemname = cursor.getString(cursor.getColumnIndex(SqliteHelpers.NOTES_COLUMN));
if (itemname != null) {
arrayList.add(itemname);
}
}
return arrayList;
}
As you can see in image there are four items all are same but i want one tobe return other will be returned normal. except more than one.image
Just return the column you want:
ArrayList<String> getAllNotes() {
Cursor cursor;
mDbHelper = mSqliteHelper.getWritableDatabase();
String query = "SELECT Distinct NOTES_COLUMN FROM " + SqliteHelpers.TABLE_NAME;
cursor = mDbHelper.rawQuery(query, null);
ArrayList<String> arrayList = new ArrayList<>();
while (cursor.moveToNext()) {
String itemname = cursor.getString(cursor.getColumnIndex(SqliteHelpers.NOTES_COLUMN));
if (itemname != null) {
arrayList.add(itemname);
}
}
return arrayList;
}
I am trying to query all the users data that belong to him uniquely. through FK_ID of the user in the notes table.
// Listing all notes
public Cursor listNotes() {
SQLiteDatabase db = help.getReadableDatabase();
Cursor c = db.query(help.NOTE_TABLE, new String[]{help.COLUMN_TITLE,help.COLUMN_BODY, help.COLUMN_DATE}, null, null, null, null, null);
if (c != null) {
c.moveToFirst();
}
return c;
}
// Count how many Notes user has
public int NoteCount() {
String countQuery = "SELECT * FROM " + help.NOTE_TABLE;
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();
}
// Updating single contact
public void editNote(long id, String title, String body) {
ContentValues edit = new ContentValues();
edit.put(help.COLUMN_TITLE, title);
edit.put(help.COLUMN_BODY, body);
open();
db.update(help.NOTE_TABLE, edit, help.NOTES_ID + "=" + id, null);
close();
}
// Deleting single note
public void deleteNote(long id) {
open();
db.delete(help.NOTE_TABLE, help.NOTES_ID + "=" + id, null);
close();
}
}
I have a tab that will then return all the users data uniquely to him. This tab is a fragment.the Method populateList() will be called onCreateView
public void populateList(){
Cursor cursor = control.listNotes();
getActivity().startManagingCursor(cursor);
//Mapping the fields cursor to text views
String[] fields = new String[]{help.COLUMN_TITLE,help.COLUMN_BODY, help.COLUMN_DATE};
int [] text = new int[] {R.id.item_title,R.id.item_body, R.id.item_date};
adapter = new SimpleCursorAdapter(getActivity(),R.layout.list_layout,cursor, fields, text,0);
//Calling list object instance
listView = (ListView) getView().findViewById(android.R.id.list);
adapter.notifyDataSetChanged();
listView.setAdapter(adapter);
}
This is a null pointer. Am i passing the data wrong
Cursor cursor = control.listNotes();
Your listNotes method should look like :
public Cursor listNotes(long userId) {
Cursor c = getActivity().getContentResolver().query(yourTodoTableURI, new String[]{help.COLUMN_TITLE,help.COLUMN_BODY, help.COLUMN_DATE}, help.COLUMN_USER_ID + " = ?", new String[]{String.valueOf(userId)} , null);
return c;
}
try this:
public List<String> getAllTask(int userID){
String query = "Select * from tablename where ID =" + userID;
cursor = db.query(); //do your code here
int id = cursor.getInt(cursor.getColumnIndex(tablename.ID));
List<String> task = new ArrayList<String>();
String query = "Select * from tableTask where ID =" + id";
cursor = db.query(); //
if (cursor != null) {
cursor.movetofirst();
// do your code here
do{
String task = cursor.get......
task.add(task);
}while(cursor.movetonext);
}
return task;
}
i have an error in my application.
I'm new in making apps for android, so i don´t now what's wrong...
this is in the log:
java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteQuery: SELECT * FROM pets
i have a SQLite database in which is this method:
public List<Pet> getAllPets() {
List<Pet> petList = new ArrayList<Pet>();
String selectQuery = "SELECT * FROM " + TABLE_PETS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Pet pet = new Pet();
pet.setID(Integer.parseInt(cursor.getString(0)));
pet.setName(cursor.getString(1));
pet.setAge(cursor.getString(2));
petList.add(pet);
} while (cursor.moveToNext());
}
return petList;
}
and then i'am using this method from database in other activity to fill the ListView by the names of every pet....
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
PetListView = (ListView)findViewById(R.id.list);
MyDatabaseHelper db = new MyDatabaseHelper(this);
String [] items = new String[db.getPetsCount()];
List<Pet> pets = db.getAllPets();
for (int i = 0; i < db.getPetsCount(); i++) {
items[i] = pets.get(i).getName();
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.activity_list_item, items);
PetListView.setAdapter(adapter);
}
when this activity starts the application crashes down..
Please, can you tell me what's worng? How can i fix it? Thanks a much for help.
EDIT:
getPetsCount() method:
public int getPetsCount() {
String countQuery = "SELECT * FROM " + TABLE_PETS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
return cursor.getCount();
}
i solved this by myself at the end by replace the getPetsCount method:
public int getPetsCount() {
String countQuery = "SELECT * FROM " + TABLE_PETS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
int count = cursor.getCount();
cursor.close();
db.close();
return count;
First, you should close your cursor once you have finished to use it (that may solve your issue)
public List<Pet> getAllPets() {
List<Pet> petList = new ArrayList<Pet>();
String selectQuery = "SELECT * FROM " + TABLE_PETS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Pet pet = new Pet();
pet.setID(Integer.parseInt(cursor.getString(0)));
pet.setName(cursor.getString(1));
pet.setAge(cursor.getString(2));
petList.add(pet);
} while (cursor.moveToNext());
}
// Close cursor when finished using it
cursor.close();
return petList;
}
Please help me with following, I have a database which contain strings ( e.g. fotonames ).
And I want to read entire fotonames column into an arraylist.
How can I do this?
public Cursor getfotoname() throws SQLException
{
String getRT = "SELECT fotonames from "+ TABLE_NAME+";";
Cursor mCur = sqldb.rawQuery(getRT, null);
return mCur;
}
Now when you call
Cursor mCursor=null;
mCursor= DatabaseObject.getfotoname();
ArrayList<WhateverTypeYouWant> mArrayList = new ArrayList<WhateverTypeYouWant>();
for(mCursor.moveToFirst(); mCursor.moveToNext(); mCursor.isAfterLast()) {
// The Cursor is now set to the right position
mArrayList.add(mCursor.getWhateverTypeYouWant(WHATEVER_COLUMN_INDEX_YOU_WANT));
}
Have a look at this tutorial will help you
http://www.anotherandroidblog.com/2010/08/04/android-database-tutorial/
this is where you can lear how to fetch all values from one column
http://www.anotherandroidblog.com/2010/08/04/android-database-tutorial/3/#getrowasarray
or otherway is
fire query like this
public Cursor columnValues() throws SQLException{
// TODO Auto-generated method stub
Cursor mCursor = db.query(Course_Info_Table,
new String[] {Column1 , column2 },
null,null, null, null, null);
//Cursor mCursor = mDb.rawQuery("Select",null);
if (mCursor != null)
{
mCursor.moveToFirst();
}
return mCursor;
}
and receive it like
ArrayList<String> list1 = new ArrayList<String>();
ArrayList<String> list12 = new ArrayList<String>();
cursor = dbm.columnValueofCourse();
cursor.moveToFirst();
startManagingCursor(cursor);
for (int i = 0; i < cursor.getCount(); i++) {
String reciv = cursor.getString(cursor
.getColumnIndex("column1"));
String reciv3 = cursor.getString(cursor
.getColumnIndex("column2"));
list1.add(reciv);
list2.add(reciv3);
cursor.moveToNext();
}