@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
Log.d(TAG, "update(uri=" + uri + ", values=" + values.toString() + ")");
// Open a read / write database to support the transaction.
SQLiteDatabase db = myOpenHelper.getWritableDatabase();
String rowID = "";
int updateCount = 0;
// If this is a row URI, limit the deletion to the specified row.
switch (uriMatcher.match(uri)) {
case CardCursor_SINGLE_ROW:
rowID = uri.getPathSegments().get(1);
selection =
CardCursorContract.CardCursor.KeyColumns.KEY_ID
+ "="
+ rowID
+ (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
updateCount =
db.update(
CardCursorSQLiteOpenHelper.Tables.CardCursor, values, selection, selectionArgs);
break;
default:
throw new IllegalArgumentException("Unsupported URI: " + uri);
}
if (updateCount > 0) {
// Notify any observers of the change in the data set.
getContext().getContentResolver().notifyChange(uri, null);
}
return updateCount;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
Log.d(TAG, "insert(uri=" + uri + ", values=" + values.toString() + ")");
// Open a read / write database to support the transaction.
SQLiteDatabase db = myOpenHelper.getWritableDatabase();
// To add empty rows to your database by passing in an empty Content Values
// object, you must use the null column hack parameter to specify the name of
// the column that can be set to null.
String nullColumnHack = null;
long id = -1;
if (uriMatcher.match(uri) == CardCursor_ALLROWS) {
// Insert the values into the table
id = db.insert(CardCursorSQLiteOpenHelper.Tables.CardCursor, nullColumnHack, values);
}
if (id > -1) {
// Construct and return the URI of the newly inserted row.
// Equals to Uri.parse(BASE_PATH + "/" + id);
Uri insertedId = ContentUris.withAppendedId(uri, id);
// Notify any observers of the change in the data set.
getContext().getContentResolver().notifyChange(insertedId, null);
return insertedId;
} else throw new SQLException("Problem while inserting into uri: " + uri);
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
Log.d(TAG, "delete(uri=" + uri + ")");
// Open a read / write database to support the transaction.
SQLiteDatabase db = myOpenHelper.getWritableDatabase();
String rowID = "";
int deleteCount = 0;
// If this is a row URI, limit the deletion to the specified row.
switch (uriMatcher.match(uri)) {
case CardCursor_ALLROWS:
deleteCount =
db.delete(CardCursorSQLiteOpenHelper.Tables.CardCursor, selection, selectionArgs);
break;
case CardCursor_SINGLE_ROW:
rowID = uri.getPathSegments().get(1);
selection =
CardCursorContract.CardCursor.KeyColumns.KEY_ID
+ "="
+ rowID
+ (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
deleteCount =
db.delete(CardCursorSQLiteOpenHelper.Tables.CardCursor, selection, selectionArgs);
break;
default:
throw new IllegalArgumentException("Unsupported URI: " + uri);
}
// To return the number of deleted items, you must specify a where
// clause. To delete all rows and return a value, pass in "1".
// if (selection == null)
// selection = "1";
if (deleteCount > 0) {
// Notify any observers of the change in the data set.
getContext().getContentResolver().notifyChange(uri, null);
}
return deleteCount;
}
@Override
public Cursor query(
Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
Log.d(TAG, "query(uri=" + uri + ", proj=" + Arrays.toString(projection) + ")");
// Open a read-only database.
SQLiteDatabase db = myOpenHelper.getWritableDatabase();
// Replace these with valid SQL statements if necessary.
String groupBy = null;
String having = null;
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
String rowID = "";
// If this is a row query, limit the result set to the passed in row.
switch (uriMatcher.match(uri)) {
case CardCursor_SINGLE_ROW:
queryBuilder.setTables(CardCursorSQLiteOpenHelper.Tables.CardCursor);
rowID = uri.getPathSegments().get(1);
queryBuilder.appendWhere(CardCursorContract.CardCursor.KeyColumns.KEY_ID + "=" + rowID);
break;
case CardCursor_ALLROWS:
queryBuilder.setTables(CardCursorSQLiteOpenHelper.Tables.CardCursor);
if (TextUtils.isEmpty(sortOrder)) {
sortOrder = CardCursorContract.CardCursor.DEFAULT_SORT;
}
break;
default:
throw new IllegalArgumentException("Unsupported URI: " + uri);
}
Cursor cursor =
queryBuilder.query(db, projection, selection, selectionArgs, groupBy, having, sortOrder);
// Make sure that potential listeners are getting notified
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;
}