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amitjangid80amitjangid80
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1. Modified db helper functionality.
2. Using readable when reading from db and using writable to write to db and closing the db after writing.
1 parent 9178f1c commit 6a8b12f

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+55
-17
lines changed

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+55
-17
lines changed

‎app/src/main/java/com/amit/db/DBHelper.java‎

Lines changed: 55 additions & 17 deletions
Original file line numberDiff line numberDiff line change
@@ -326,6 +326,8 @@ public boolean executeDatabaseOperations(String tableName, String operations,
326326
// if successful then it will return true
327327
// return true;
328328
db.getWritableDatabase().execSQL(query);
329+
db.close();
330+
329331
return true;
330332
}
331333
catch (Exception e)
@@ -353,7 +355,7 @@ public Cursor executeSelectQuery(String query)
353355
try
354356
{
355357
// query execution
356-
Cursor cursor = db.getWritableDatabase().rawQuery(query, null);
358+
Cursor cursor = db.getReadableDatabase().rawQuery(query, null);
357359

358360
// if cursor is not null then moving the position to first
359361
// and returning the cursor
@@ -448,7 +450,7 @@ public Cursor executeSelectQuery(String tableName, String values,
448450
}
449451

450452
// executing query
451-
cursor = db.getWritableDatabase().rawQuery(query, null);
453+
cursor = db.getReadableDatabase().rawQuery(query, null);
452454

453455
// if cursor is not null then moving the position to first
454456
// and returning the cursor
@@ -551,7 +553,7 @@ public <T> ArrayList<T> executeSelectQuery(String tableName, String values,
551553
}
552554

553555
// executing query
554-
cursor = db.getWritableDatabase().rawQuery(query, null);
556+
cursor = db.getReadableDatabase().rawQuery(query, null);
555557

556558
// if cursor is not null then moving the position to first
557559
// and returning the cursor
@@ -873,6 +875,8 @@ public boolean executeQuery(String query)
873875
if (query != null && !query.equalsIgnoreCase(""))
874876
{
875877
db.getWritableDatabase().execSQL(query);
878+
db.close();
879+
876880
return true;
877881
}
878882
else
@@ -954,6 +958,11 @@ public DBHelper createTable(String tableName)
954958
// checking if table name was provided or not
955959
if (tableName == null || tableName.isEmpty())
956960
{
961+
if (dbColumnArrayList != null)
962+
{
963+
dbColumnArrayList.clear();
964+
}
965+
957966
Log.e(TAG, "createTable: Table name was null or empty.");
958967
return this;
959968
}
@@ -992,6 +1001,8 @@ public DBHelper createTable(String tableName)
9921001
Log.e(TAG, "createTable: Create table query is: " + query.toString());
9931002

9941003
db.getWritableDatabase().execSQL(query.toString());
1004+
db.close();
1005+
9951006
dbColumnArrayList = new ArrayList<>();
9961007

9971008
return this;
@@ -1031,7 +1042,9 @@ public DBHelper alterTable(String tableName)
10311042
{
10321043
query = "ALTER TABLE " + tableName + " ADD COLUMN " + columnName + " " + columnDataType;
10331044
Log.e(TAG, "alterTable: query for adding new column or altering table is: " + query);
1045+
10341046
db.getWritableDatabase().execSQL(query);
1047+
db.close();
10351048
}
10361049
else
10371050
{
@@ -1065,6 +1078,11 @@ public DBHelper insertData(String tableName)
10651078
// checking if table name was provided or not
10661079
if (tableName == null || tableName.isEmpty())
10671080
{
1081+
if (dbDataArrayList != null)
1082+
{
1083+
dbDataArrayList.clear();
1084+
}
1085+
10681086
Log.e(TAG, "insertData: Table name was null or empty.");
10691087
return this;
10701088
}
@@ -1089,8 +1107,9 @@ public DBHelper insertData(String tableName)
10891107

10901108
// executing inserting statement for inserting records in table
10911109
db.getWritableDatabase().insert(tableName, null, contentValues);
1110+
db.close();
1111+
10921112
dbDataArrayList = new ArrayList<>();
1093-
10941113
return this;
10951114
}
10961115

@@ -1103,7 +1122,7 @@ public DBHelper insertData(String tableName)
11031122
*
11041123
* this method will insert data into table using database transaction
11051124
* this method is useful for inserting bulk records into table in less time
1106-
**/
1125+
**/
11071126
//#endregion COMMENTS FOR insertDataWithTransaction method
11081127
@Deprecated
11091128
public void insertDataWithTransaction(String tableName)
@@ -1235,6 +1254,7 @@ else if (columnData instanceof Double || columnData instanceof Float)
12351254

12361255
db.getWritableDatabase().setTransactionSuccessful();
12371256
db.getWritableDatabase().endTransaction();
1257+
db.close();
12381258

12391259
dbDataArrayList = new ArrayList<>();
12401260
}
@@ -1386,6 +1406,7 @@ else if (columnData instanceof Double || columnData instanceof Float)
13861406

13871407
db.getWritableDatabase().setTransactionSuccessful();
13881408
db.getWritableDatabase().endTransaction();
1409+
db.close();
13891410

13901411
dbDataArrayList = new ArrayList<>();
13911412
}
@@ -1456,7 +1477,7 @@ else if (object instanceof JSONArray)
14561477
}
14571478
}
14581479

1459-
this.insertDataWithTransaction(tableName, 5);
1480+
this.insertData(tableName);
14601481
return true;
14611482
}
14621483
catch (Exception e)
@@ -1565,24 +1586,27 @@ public DBHelper updateData(String tableName, String whereClause, String whereArg
15651586
// checking if table name was provided or not
15661587
if (tableName == null || tableName.isEmpty())
15671588
{
1589+
if (dbDataArrayList != null)
1590+
{
1591+
dbDataArrayList.clear();
1592+
}
1593+
15681594
Log.e(TAG, "updateData: Table name was null or empty.");
15691595
return this;
15701596
}
15711597

15721598
// checking if column name was provided or not
15731599
if (whereClause == null || whereClause.isEmpty())
15741600
{
1601+
if (dbDataArrayList != null)
1602+
{
1603+
dbDataArrayList.clear();
1604+
}
1605+
15751606
Log.e(TAG, "updateData: Column name was null or empty.");
15761607
return this;
15771608
}
15781609

1579-
// checking if column data was provided or not
1580-
if (whereArgs == null || whereArgs.isEmpty())
1581-
{
1582-
Log.e(TAG, "updateData: Column data was null or empty.");
1583-
return this;
1584-
}
1585-
15861610
// checking if data was provided or not
15871611
if (dbDataArrayList == null || dbDataArrayList.size() == 0)
15881612
{
@@ -1600,8 +1624,19 @@ public DBHelper updateData(String tableName, String whereClause, String whereArg
16001624
// adding column names and column data into content values
16011625
contentValues.put(dbDataArrayList.get(i).columnName, dbDataArrayList.get(i).columnData.toString());
16021626
}
1603-
1604-
db.getWritableDatabase().update(tableName, contentValues, whereClause, new String[]{whereArgs});
1627+
1628+
// checking if column data was provided or not
1629+
if (whereArgs != null && whereArgs.isEmpty())
1630+
{
1631+
db.getWritableDatabase().update(tableName, contentValues, whereClause, new String[]{whereArgs});
1632+
}
1633+
else
1634+
{
1635+
// you can directly pass the values to where clause
1636+
db.getWritableDatabase().update(tableName, contentValues, whereClause, null);
1637+
}
1638+
1639+
db.close();
16051640
dbDataArrayList = new ArrayList<>();
16061641

16071642
return this;
@@ -1629,7 +1664,10 @@ public boolean deleteTable(String tableName)
16291664
}
16301665

16311666
String query = "DELETE TABLE IF EXISTS " + tableName;
1667+
16321668
db.getWritableDatabase().execSQL(query);
1669+
db.close();
1670+
16331671
return true;
16341672
}
16351673
catch (Exception e)
@@ -1699,7 +1737,7 @@ public <T> ArrayList<T> getAllRecords(String tableName, boolean isAscending,
16991737
Log.e(TAG, "getAllRecords: Select query for getting all records is: " + query);
17001738

17011739
// executing generated select query
1702-
cursor = db.getWritableDatabase().rawQuery(query, null);
1740+
cursor = db.getReadableDatabase().rawQuery(query, null);
17031741

17041742
// checking if cursor is not null and cursor has moved to first position
17051743
if (cursor != null && cursor.moveToFirst())
@@ -1871,7 +1909,7 @@ public <T> ArrayList<T> getAllRecords(String tableName, boolean isAscending,
18711909
Log.e(TAG, "getAllRecords: Select query for getting all records is: " + query);
18721910

18731911
// executing generated select query
1874-
cursor = db.getWritableDatabase().rawQuery(query, null);
1912+
cursor = db.getReadableDatabase().rawQuery(query, null);
18751913

18761914
// checking if cursor is not null and cursor has moved to first position
18771915
if (cursor != null && cursor.moveToFirst())

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