Develop Reference

how to update sqlite db in Android?

I want to update one row based on multiple row value, After run the application getting error like = ( FATAL EXCEPTION: main
android.database.sqlite.SQLiteException: near "=": syntax error (code 1): , while compiling: UPDATE Tablename SET sFollowed=?,Code=?,Name=? WHERE Vessel_Name= )
Here is my update method in MyDbhelper class
public boolean update_isFollowed(String strVesselName , String strVesselNotationNumber, String strIsFollowed) {
SQLiteDatabase db1 = getReadableDatabase();
ContentValues values=new ContentValues();
values.put(COL_VesselName,strVesselName );
values.put(COL_ClassCodeNumber , strVesselNotationNumber);
values.put(COL_IsFollowedVessels, strIsFollowed);
int id=db1.update(Table_VesselList,values,COL_ClassCodeNumber + "=" +strVesselNotationNumber +" and "+ COL_VesselName +"="+strVesselName,null);
return id > 0;
}

Do something like this
In your activity
private UpdateDataInDB mUpdateDataInDb;
mUpdateDataInDb = new UpdateDataInDB(activity);
// call the update method with updated strings
mUpdateDataInDb.updateCommentDetails(_name, heading, comment);
In Database class
public void updateCommentDetails(String name, String updatedHeading,
String updatedComment) {
// TODO Auto-generated method stub
mDatabase = mDatabase_handler.getReadableDatabase();
ContentValues args = new ContentValues();
args.put("Heading", updatedHeading);
args.put("Comment", updatedComment);
mDatabase.update("AddCommentTable", args,"Name" + "= ?", new String[]{ name });
args.clear();
}

Use proper where condition string with values as argument. like:
String where = COL_ClassCodeNumber+"=? AND "+COL_VesselName="?";
String[] whereArgs = new String[] {String.valueOf(strVesselNotationNumber),
String.valueOf(strVesselName)};
int id=db1.update(Table_VesselList,values,where,whereArgs);

Android unable to escaping single quote character while SQLite database update

Hi in my database i have a string like "computer's" , i am fetching it from database and displaying listview, when i click on the list item it should store to one of my database table. I am doing it as below but it is getting crashed
public void updateFav(String key, int value) {
SQLiteDatabase db = mDbHelper.getWritableDatabase();
ContentValues values = new ContentValues();
C_FAV=C_FAV.replaceAll("'","''");
values.put(C_FAV, value);
db.update(tableName, values, C_KEY + "='" + key.trim() + "'", null);
db.close();
}
Below is my trace
12-12 17:55:49.291: E/AndroidRuntime(18184): android.database.sqlite.SQLiteException: near "s":
syntax error (code 1): , while compiling: UPDATE fav SET favorite=? WHERE key='computer's'

You're escaping the apostrophes in C_FAV which seems to be a column name but not in key.
Consider using ? placeholder and bind arguments instead, e.g.
db.update(tableName, values, C_KEY + "=?", new String[] { key.trim() });

Android SQLite: insert() issues

i'm trying to insert some data into a SQLite3 Database on an Android system.
This method should takes three strings and insert them into a database:
public void createEntry(String description, String reps, String weight)
{
ContentValues cv = new ContentValues();
cv.put(KEY_DESCRIPTION, description);
cv.put(KEY_REPS, reps);
cv.put(KEY_WEIGHT, weight);
sqlDB.insert(DATABASE_TABLE, null, cv);
}
The columns(KEY_DESCRIPTION,..) are all defined as TEXT NOT NULL and I also added an auto incrementing column.
In my main activity I'm using this code to get input from EditText Widgets
String description = sqlDescription.getText().toString();
then I'm creating an instance of my DB class:
DB entry = new DB(MainActivity.this);
entry.open();
entry.createEntry(description, reps, weight);
entry.close();
open() uses the SQLiteOpenHelper and sets up database:
public DB open()
{
sqlHelper = new dbHelper(sqlContext);
sqlDB = sqlHelper.getWritableDatabase();
return this;
}
But when I call this method:
entry.createEntry(description, reps, weight);
I get following error:
(1) near "Table": syntax error
E/SQLiteDatabase(19344): Error inserting Description=test Weight=tesz Reps=test
E/SQLiteDatabase(19344): android.database.sqlite.SQLiteException: near "Table": syntax error
(code 1): , while compiling: INSERT INTO Table(Description,Weight,Reps) VALUES (?,?,?)

TABLE is a reserved word in SQL; you should not use it as the name of the table.
Try changing it to:
private static final String DATABASE_TABLE = "myTable";

How can I update my EditText values?

I am new to android , as I am trying to update data using context menu item "EDIT". Using EDIT I will go to EditText layout then I will press update Note, But it's not updating the EditText Data.
My Code Database:
public void updateNote(String filename, String filedata, String duedate){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues updatenote = new ContentValues();
updatenote.put(Col_File_Name, filename);
updatenote.put(Col_File_Data, filedata);
updatenote.put(Col_Due_Date, duedate);
db.update(Table_Notepad, updatenote, Col_ID + "=?", null);
db.close();
}
Activity:
case R.id.Save:
String get_title = Title_Edit.getText().toString();
String get_content = Content_Edit.getText().toString();
String get_duedate = duedatetext.getText().toString();
if(!get_title.equals("") || !get_content.equals(""))
{
if (!isEdit) {
//if it isn't edit mode we just add a new note to db
Database_Notepad db = new Database_Notepad(Add_Task.this);
db.Create_Note(get_title, get_content, get_duedate);
} else {
//if this is edit mode, we just update the old note
Database_Notepad db = new Database_Notepad(Add_Task.this);
db.updateNote(get_title, get_content, get_duedate);
db.close();
}
}
Please Suggest, I think I need to correct database code. Please suggest. Thanks

Your function updateNote need Record ID which you want to update.
Like
public void updateNote(int id, String filename, String filedata, String duedate){
instead
public void updateNote(String filename, String filedata, String duedate){
and compare that id which your entire record, it will check and update your particular record, change your function function something like below:
public void updateNote(int id, String filename, String filedata, String duedate){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues updatenote = new ContentValues();
updatenote.put(Col_File_Name, filename);
updatenote.put(Col_File_Data, filedata);
updatenote.put(Col_Due_Date, duedate);
db.update(Table_Notepad, updatenote, "rowid= "+id,, null);// rowid or name of your id column
db.close();
}
and pass the id too along with others parameter.
Use
db.updateNote(id, get_title, get_content, get_duedate);
instead
db.updateNote(get_title, get_content, get_duedate);

In updateNode(), you need to change this update or insert values:
public void updateNote(long rowId, String filename, String filedata, String duedate){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues updatenote = new ContentValues();
updatenote.put(Col_File_Name, filename);
updatenote.put(Col_File_Data, filedata);
updatenote.put(Col_Due_Date, duedate);
if (rowId >=0)
db.update(Table_Notepad, updatenote, Col_ID + "=?", new String[] {""+rowId});
else
db.insert(Table_Notepad, null, updatenote);
db.close();
}
Then, if you are creating a new note you can call:
updateNote(-1, filename, filedata, duedate);
and if you are updating an existing one, you will have to pass in the ID:
updateNote(noteRowId, filename, filedata, duedate);.
Source: check these Android docs.

Need to pass row id to update in last argument
db.update(Table_Notepad, updatenote, Col_ID + "=?", new String[]{id});
Happy coding

Android Database query

I have application, which downloads data from internet and is supposed to write it to DB using content provider.
private void addCurrency(Currency _currency){
ContentResolver cr=getContentResolver();
ContentValues values = new ContentValues();
values.put(CurrencyProvider.KEY_DATE, _currency.getDate().getTime());
values.put(CurrencyProvider.KEY_NAME, _currency.getName());
values.put(CurrencyProvider.KEY_NOMINAL, _currency.getNominal());
values.put(CurrencyProvider.KEY_VALUE, _currency.getValue());
String w=CurrencyProvider.KEY_NAME+" = "+_currency.getName();
if (cr.query(CurrencyProvider.CONTENT_URI, null, w,null , null).getCount()==0){
cr.insert(CurrencyProvider.CONTENT_URI, values);
}else
cr.update(CurrencyProvider.CONTENT_URI, values, w, null);
}
So, I'm trying either to update record if it exists, or to add new.
But I'm getting SQLite exception:
near "доллар": syntax error: , while compiling: SELECT * FROM currency WHERE (name = Австралийский доллар)

Try surrounding your name with quote
String w=CurrencyProvider.KEY_NAME+" = '"+_currency.getName() + "'";