User Case :
- Select item by id, if its already present in the basket.
- Check the numbers of this item.
- If item numbers == 1 then delete this item from basket table and return 0.
- If its greater than 1 then decrement it by one and update the table and return number-- .
Its not updating my "numbers" column, and silently passes through the execution and I am helpless nor can I post any stack trace here, but I am posting my code fragment, responsible for this job.
public int removeFromBasketasAnonymous(Long _id){
Log.d("app : ", " _id = " + _id);
int numbers = 0;
try {
database = openDatabaseInReadMode();
Cursor cursor = database.rawQuery("select * from basket where basket._id=" + _id + ";", null);
if (cursor != null) {
cursor.moveToFirst();
Log.d(APP, "GetCount = " + cursor.getCount());
if (cursor.getCount() == 1) {
//this item already present in basket
numbers = cursor.getInt(1);
Log.d(APP, " numbers = " + numbers);
Log.d(APP, "db id = " + cursor.getString(0));
String[] columns = cursor.getColumnNames();
for(String str : columns){
Log.d("APP ", " columns = "+str);
}
Log.d(APP, " id = " + _id);
if (numbers == 1) {
//remove this row entry
cursor.close();
database.close();
database = openDatabaseInReadWriteMode();
database.beginTransaction();
String strSQL = "DELETE from basket where basket._id=" + _id;
try{
database.execSQL(strSQL);
}catch(Exception e){
e.printStackTrace();
}finally{
database.endTransaction();
database.close();
}
numbers--;
} else {
//decrement this number by one
Log.d(APP, " number " + numbers);
numbers--;
Log.d(APP, " dcremented numbers = " + numbers);
cursor.close();
database.close();
database = openDatabaseInReadWriteMode();
database.beginTransaction();
try{
ContentValues data = new ContentValues();
data.put("numbers", numbers);
database.update("basket", data, "_id = " + _id, null);
}catch (Exception e){
e.printStackTrace();
}finally {
database.endTransaction();
database.close();
}
}
}
}
}finally{
if(database != null){
database.close();
}
}
return numbers;
}
public SQLiteDatabase openDatabaseInReadMode() {
File dbFile = context.getDatabasePath(DB_NAME);
if (!isDataBaseExist()) {
try {
copyDatabase(dbFile);
} catch (IOException e) {
throw new RuntimeException("Error creating source database", e);
}
}
/*Log.d("DB available", "path = " + dbFile.exists() + " path" + dbFile.getPath());*/
/*Log.d("actual path ", "exists = " + isDataBaseExist());*/
return SQLiteDatabase.openDatabase(dbFile.getPath(), null, SQLiteDatabase.OPEN_READONLY);
}
public SQLiteDatabase openDatabaseInReadWriteMode() {
File dbFile = context.getDatabasePath(DB_NAME);
if (!isDataBaseExist()) {
try {
copyDatabase(dbFile);
} catch (IOException e) {
throw new RuntimeException("Error creating source database", e);
}
}
/*Log.d("DB available", "path = " + dbFile.exists() + " path" + dbFile.getPath());*/
/*Log.d("actual path ", "exists = " + isDataBaseExist());*/
return SQLiteDatabase.openDatabase(dbFile.getPath(), null, SQLiteDatabase.OPEN_READWRITE);
}
Regards, Shashank
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