Develop Reference

Inserting rows into table only once in Android Database

I want to only insert like 10 rows into a table at database creation. I do not want them added every time the app is open. Just once as a table with final values. How would I go about doing this? Thanks!
public void insertEvents(){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(COL_EVENT, "value1");
values.put(COL_EVENT, "value2");
values.put(COL_EVENT, "value3");
values.put(COL_EVENT, "value4");
db.insert(TABLE_EVENTS, null, values);
}

Since you are using SQLiteOpenHelper, put the inserts in its onCreate(). Use the SQLiteDatabase passed in as argument, do not recursively call getWritableDatabase().

Do it in onCreate method of DatabaseHelper
EDIT: here is the similar question. Or you can try this tutorial

I know this might be too late but I'm just sharing my answers. Your code seems to show that you are trying to add 4 rows. Here are some pointers:
1) Do it in the onCreate method, as mentioned by #Georgiy Shur.
2) The insert method only inserts one row at a time. So you should do this instead:
ContentValues values = new ContentValues();
values.put(COL_EVENT, "value1");
db.insert(TABLE_EVENTS, null, values);
values.put(COL_EVENT, "value2");
db.insert(TABLE_EVENTS, null, values);
values.put(COL_EVENT, "value3");
db.insert(TABLE_EVENTS, null, values);
values.put(COL_EVENT, "value4");
db.insert(TABLE_EVENTS, null, values);

How to keep the database updated when the user enters new values in android studio?

I'm dealing with a simple app, which basically stores various dates. But when I enter a new date, I have to close the app and open it again. The same thing counts for changing the date values. I can only see the changes by closing the app and reopening it.
Here are the two main functions in my DB class;
public void addBirthday(Person person){ //Add a data to database
SQLiteDatabase db = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(column_name, person.getName());
cv.put(column_sname, person.getSname());
cv.put(column_day, person.getDay());
cv.put(column_month, person.getMonth());
cv.put(column_year, person.getYear());
db.insert(TABLE_NAME, null, cv);
db.close();
}
public int updateBirthday(Person person) {
// 1. get reference to writable DB
SQLiteDatabase db = this.getWritableDatabase();
// 2. create ContentValues to add key "column"/value
ContentValues cv = new ContentValues();
cv.put(column_name, person.getName());
cv.put(column_sname, person.getSname());
cv.put(column_day, person.getDay());
cv.put(column_month, person.getMonth());
cv.put(column_year, person.getYear());
// 3. updating row
int i = db.update(TABLE_NAME, //table
cv, // column/value
column_id +" = ?", // selections
new String[] { String.valueOf(person.getId()) }); //selection args
// 4. close
db.close();
return i;
}

You will need to refresh the view (probably a ListView) where you display this data.

Get rid of the notifyDataSetChanged() and call requery() on your Cursor

Method db.delete some rows?

In the table I have 4 fields (note1, note2, note3, Note4). I want to delete all the data in note1 and note2. I have to add arguments to the method db.delete, but I have trouble.
public void delete() {
SQLiteDatabase db= mHelper.getWritableDatabase();
db.delete(noteTable.TABLE_NAME, null, null);
}

Delete always deletes entire rows.
To clear values in specific columns, use an update query, for example
ContentValues cv = new ContentValues();
cv.putNull("note1");
cv.putNull("note2");
db.update(noteTable.TABLE_NAME, cv, null, null);

Names are getting overlapped in SQLite

In my Android App, I am trying to insert names in a column forcefully into database but In database only last name is showing i.e. Myself because names are overlapping. Actually My database portion is weak.
This is what I am doing in my Database Handler Class,
public void addPoliticianNames()
{
ContentValues values=new ContentValues();
values.put(KEY_POLITICIANNAMES, "I");
values.put(KEY_POLITICIANNAMES, "Me");
values.put(KEY_POLITICIANNAMES, "Myself");
db.insert(TABLE_POLLINGVOTES, null, values);
}
What to do for getting these names sequentially into the column (Here I have to insert names forcefully as I have mentioned above). So, Is there any method for this ? Is there any role of cursor in doing this job (like movetonext method or something like that) ?
Please help me,
Thanks.

you have to make one loop for inserting data into database. it will pick one by one value from array and put it into database.
Put this method in your database class
public void deleteTable()
{
database.delete(TABLE_POLLINGVOTES, null, null);
}
db.deleteTable(); // call it with this line for delete all records of your table
// for inserting data into table.
String[] a = {"I","Me","MySelf"};
ContentValues values = new ContentValues();
for (int i = 0; i < a.length; i++)
{
values.put(KEY_POLITICIANNAMES, a[i]);
db.insert(TABLE_POLLINGVOTES, null, values);
}
Hope it will help you.

If you want to insert three records, you have to use three insert calls.
For example:
ContentValues values=new ContentValues();
values.put(KEY_POLITICIANNAMES, "I");
db.insert(TABLE_POLLINGVOTES, null, values);
values.put(KEY_POLITICIANNAMES, "Me");
db.insert(TABLE_POLLINGVOTES, null, values);
values.put(KEY_POLITICIANNAMES, "Myself");
db.insert(TABLE_POLLINGVOTES, null, values);

#Shiv change the column name for every value
public void addPoliticianNames(String ss)
{
ContentValues values=new ContentValues();
values.put(KEY_POLITICIANNAMES, ss);
}
ss contain value firts time "I",second time "me" like that

ListView returning multiple entries for same record from SQLite

I'm not entirely sure which part of my code is making this happen. This is my first attempt at coding in SQLite with Android and I'm using ContentValues to input records into the database. I get no errors or anything and data is inserted properly, however I'm getting 5 ListView entries for each record when I pull them from the database. It's either that I misunderstand how data is entered when using ContentValues and .insert to place the data in the database or I'm doing something wrong when retrieving data from the database.
Here is the code I'm using to insert data into the database.
DatabaseHelper helper = new DatabaseHelper(this);
database = helper.getWritableDatabase();
ContentValues cv=new ContentValues();
cv.put(myName, titleText);
cv.put(myFileName, filenameText);
cv.put(myRecDate, recordedText);
cv.put(myPubDate, publishedText);
cv.put(myDescription, DescriptionText);
database.insert(myTable, castName, cv);
database.insert(myTable, castFileName, cv);
database.insert(myTable, castRecDate, cv);
database.insert(myTable, castPubDate, cv);
database.insert(myTable, castDescription, cv);
database.close();
Here is my code for populating my ListView.
DatabaseHelper helper = new DatabaseHelper(this);
database = helper.getWritableDatabase();
Cursor data = database.query("myDb", fields, null, null, null, null, null);
dataSource = new SimpleCursorAdapter(this, R.layout.row, data, fields, new int[] {R.id.idText, R.id.name, R.id.description});
final ListView view = getListView();
view.setHeaderDividersEnabled(true);
view.addHeaderView(getLayoutInflater().inflate(R.layout.row, null));
setListAdapter(dataSource);
database.close();
Since data is successfully being inserted, I don't think there's anything wrong with my DatabaseHelper class. Any advice is greatly appreciated.

ContentValues is supposed to represent a single record. So you have this part where you are creating the record from your object. These should be a mapping of column name to column value.
cv.put(myName, titleText);
cv.put(myFileName, filenameText);
cv.put(myRecDate, recordedText);
cv.put(myPubDate, publishedText);
cv.put(myDescription, DescriptionText);
And then here you are inserting the same record 5 times. I'm assuming your second parameters here are the column names.
database.insert(myTable, castName, cv);
database.insert(myTable, castFileName, cv);
database.insert(myTable, castRecDate, cv);
database.insert(myTable, castPubDate, cv);
database.insert(myTable, castDescription, cv);
In Android, you just need to specify the table name, myTable in this case, the second parameter should be null, and the final parameter should be the ContentValues object.
So the correct way to do this would be:
ContentValues cv = new ContentValues();
cv.put(nameColumn, nameValue);
cv.put(fileNameColumn, fileNameValue);
... etc ...
database.insert(tableName, null, cv);

Looks like you are calling insert() for each column. Put the column values into the ContentValues object with the ID of the column name. Then call
database.insert(myTable, null, cv);
only once.