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;
}
Related
I have some data from the database that I want to show randomly and only 5 data appear, I've tried using ORDER BY RAND () but the app crashes when I open it
below is my syntax query
public List<Soal> getSoal(){
List<Soal> listSoal = new ArrayList<Soal>();
String query = "select * from tbl_soal ORDER BY RAND() LIMIT 5";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(query, null);
if(cursor.moveToFirst()){
do{
Soal s = new Soal();
s.setSoal(cursor.getString(1));
s.setPil_a(cursor.getString(2));
s.setPil_b(cursor.getString(3));
s.setPil_c(cursor.getString(4));
s.setPil_d(cursor.getString(5));
s.setJwban(cursor.getInt(6));
s.setGambar(cursor.getInt(7));
listSoal.add(s);
}while(cursor.moveToNext());
}
return listSoal;
}
so where is the error, or is there any solution for my problem ?
You can check this answer as well
https://stackoverflow.com/a/23628508/6672577
public List<Soal> getSoal() {
List<Soal> listSoal = new ArrayList<Soal>();
String query = "SELECT * FROM table ORDER BY RANDOM() LIMIT 5";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(query, null);
if (cursor != null) { // To check that cursor is not null.
if (cursor.moveToFirst()) {
do {
Soal s = new Soal();
s.setSoal(cursor.getString(1));
s.setPil_a(cursor.getString(2));
s.setPil_b(cursor.getString(3));
s.setPil_c(cursor.getString(4));
s.setPil_d(cursor.getString(5));
s.setJwban(cursor.getInt(6));
s.setGambar(cursor.getInt(7));
listSoal.add(s);
} while (cursor.moveToNext());
}
}
return listSoal;
}
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 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[] {};
}
}
I wrote this function which takes in a post id and finds the last name for that post id.When I run this I get error :
database.cursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
What is wrong?
public Person_Obj GetPerson_Obj(int post_id)
{
Person_Obj obj = new Person_Obj();
SQLiteDatabase db = this.getReadableDatabase();
String selectQuery = "SELECT * FROM " + TABLE_Persons + " WHERE "
+ Post_Id + " = " + post_id;
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor != null)
cursor.moveToFirst();
obj.set_last_name(cursor.getString(cursor.getColumnIndex("LastName")));
return obj;
}
Try this,
SQLiteDatabase db = database.getReadableDatabase();
Cursor cursor = db.rawQuery("query", null);
// looping through all rows and adding to list
if (cursor.moveToFirst())
{
do
{
// write your code
} while (cursor.moveToNext());
}
database.close();
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;
}