Develop Reference

How to retrieve a single column data from a Android sugar orm database

I have created a Sugar ORM database successfully in my app, I can update, delete and also get all data from a row, but I want a single column data matched with another data...
I mean, I have a registration database with fields: username, password, first_name, last_name, email fields.
After login a user with right username and password, I want THAT User's First_Name in a Textview sent to the Next Activity...
How can I do this? Over last two days I have tried but failed, please help me...
Thanks in advance...

public static List<String> getResultWithRawQuery(String rawQuery, Context mContext) {
List<String> stringList = new ArrayList<>();
if (mContext != null) {
long startTime = System.currentTimeMillis();
SugarDb sugarDb = new SugarDb(mContext);
SQLiteDatabase database = sugarDb.getDB();
try {
Cursor cursor = database.rawQuery(rawQuery, null);
try {
if (cursor.moveToFirst()) {
do {
stringList.add(cursor.getString(0));
} while (cursor.moveToNext());
}
Timber.d(cursor.getString(0), "hi");
} finally {
try {
cursor.close();
} catch (Exception ignore) {
}
}
} catch (Exception e) {
e.printStackTrace();
}
long endTime = System.currentTimeMillis();
long totalTime = endTime - startTime;
System.out.println("total time query" + totalTime);
}
return stringList;
}
Another example that returns a List of values in the column. Use as such:
String rawQuery = ("SELECT feed_key FROM team_feed_key WHERE team_id = " + mTeam_id + " ORDER BY feed_key DESC");

Did you try to run a raw query like this?
List<Note> notes = Note.findWithQuery(Note.class, "Select * from Note where name = ?", "satya");
from: http://satyan.github.io/sugar/query.html

you can add function to SugarRecord.java forever
public static String Scaler(String Query) {
String Result = "";
SugarDb db = getSugarContext().getSugarDb();
SQLiteDatabase sqLiteDatabase = db.getDB();
SQLiteStatement sqLiteStatament = sqLiteDatabase
.compileStatement(Query);
try {
Result = sqLiteStatament.simpleQueryForString();
} catch (Exception e) {
e.printStackTrace();
} finally {
sqLiteStatament.close();
}
return Result;
}
or
public static String Scaler(String Query) {
String Result = "";
SQLiteDatabase sqLiteDatabase = SugarContext.getSugarContext().getSugarDb().getDB();
SQLiteStatement sqLiteStatament = sqLiteDatabase
.compileStatement(Query);
try {
Result = sqLiteStatament.simpleQueryForString();
} catch (Exception e) {
e.printStackTrace();
} finally {
sqLiteStatament.close();
}
return Result;
}
Scaler("Select First_Name from Note where name ='ali' limit 1");

I had the same problem.
I hope this helps someone:
String firstName = Select.from(User.class).where("EMAIL = "+ user.getEmail()).first().getFirstName();

Hi this must work you can not edit the libraries but you can extend them so check this out:
public class DBUtils extends SugarRecord {
public static <T> List<Object> findByColumn(Context context, String tableName,T ColumnObjectType, String columnName) {
Cursor cursor = new SugarDb(context).getDB().query(tableName, new String[]{columnName}, null, null,
null, null, null, null);
List<Object> objects = new ArrayList<>();
while (cursor.moveToNext()){
if (ColumnObjectType.equals(long.class) || ColumnObjectType.equals(Long.class)) {
objects.add(cursor.getLong(0));
}else if(ColumnObjectType.equals(float.class) || ColumnObjectType.equals(Float.class)){
objects.add(cursor.getFloat(0));
}else if(ColumnObjectType.equals(double.class) || ColumnObjectType.equals(Double.class)){
objects.add(cursor.getDouble(0));
}else if(ColumnObjectType.equals(int.class) || ColumnObjectType.equals(Integer.class)){
objects.add(cursor.getInt(0));
}else if(ColumnObjectType.equals(short.class) || ColumnObjectType.equals(Short.class)){
objects.add(cursor.getShort(0));
}else if(ColumnObjectType.equals(String.class)){
objects.add(cursor.getString(0));
}else{
Log.e("SteveMoretz","Implement other types yourself if you needed!");
}
}
if (objects.isEmpty()) return null;
return objects;
}
}
The usage is simple use DBUtils.findByColumn(...);
Any where you like and from now on you can use only this class instead of SugarRecord and add your own other functions as well.
hint:
ColumnObjectType as the name Suggest tells the type of column like you send Integer.class

SQLite Query to Get Column Data

Using following query to get column data:
public String getR(String str) {
String strR = "SELECT col_no FROM tracking where col_id = '"+str+"' ORDER BY col_no DESC LIMIT 1";
return strR;
}
In Activity, I am trying to read returned strR :
String string = mydb.getR("1400");
Toast.makeText(SyncAll.this, string, Toast.LENGTH_SHORT).show();
But in Toast, I am getting my Select query itself instead of Record, like this:
SELECT col_no FROM tracking where col_id = '1400' ORDER BY col_no DESC LIMIT 1
May I know ! Where I am doing mistake ?

I tried the same way suggested by prosper k above, and finally got the solution:
public String getR(String str) {
String strR = "SELECT col_no FROM tracking where col_id = '"+str+"' ORDER BY col_no DESC LIMIT 1";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(strR, null);
if (cursor != null)
cursor.moveToFirst();
strR = cursor.getString(0);
return strR;
}

You're calling the function getR, which is returning the string value strR.
I'm assuming that mydb is an extended object from class SQLiteOpenHelper, and that you have followed the documentation here https://developer.android.com/training/basics/data-storage/databases.html then you'll have to execute the query like:
Cursor cursor = null;
try {
SQLiteDatabase db = this.getWritableDatabase();
synchronized(this) {
cursor = db.rawQuery(query, null);
if (cursor.moveToFirst()) {
col_no = cursor.getInt(0);
}
}
} finally {
if (null != cursor)
cursor.close();
}
return col_no;

How to iterate and retrieve over all data stored in sqlite database

I am having problem while retrieving data from sqlite database what I need is to retrieve all data on console. But I am getting only one rows data on console
Here is the code to insert and retrieve data from Sqlite. Please specify what I am missing or doing wrong. Thanks for any help.
public long InsertContacts(Contacts contacts) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(KEY_IMAGE, DbUtility.getBytes(contacts.getBmp()));
contentValues.put(KEY_BABY_NAME, contacts.getBaby_name());
contentValues.put(KEY_GENDER, contacts.getBaby_gender());
contentValues.put(KEY_SET_DATE, contacts.getDate());
contentValues.put(KEY_SET_TIME, contacts.getTime());
return db.insert(TABLE_NAME, null, contentValues);
}
public Contacts retriveContactsDetails() {
SQLiteDatabase db = this.getReadableDatabase();
String[] columns = new String[]{KEY_IMAGE, KEY_BABY_NAME, KEY_GENDER, KEY_SET_DATE, KEY_SET_TIME};
Cursor cursor = db.query(TABLE_NAME, columns, null, null, null, null, null);
cursor.moveToFirst();
while (cursor.isAfterLast() == false) {
byte[] blob = cursor.getBlob(cursor.getColumnIndex(KEY_IMAGE));
String name = cursor.getString(cursor.getColumnIndex(KEY_BABY_NAME));
String gender = cursor.getString(cursor.getColumnIndex(KEY_GENDER));
String date = cursor.getString(cursor.getColumnIndex(KEY_SET_DATE));
String time = cursor.getString(cursor.getColumnIndex(KEY_SET_TIME));
Log.d(TAG, DbUtility.getImage(blob) + name + "-" + gender + "-" + date + "- " + time); // I need to get all date here that have been inserted but i am getting only first rows data every time i insert.
cursor.moveToNext();
return new Contacts(DbUtility.getImage(blob), name, gender, date, time);
}
cursor.close();
return null;
}
}
Contacts.java
public class Contacts {
private Bitmap bmp;
private String baby_name;
private String baby_gender;
private String date;
private String time;
public Contacts(Bitmap b, String n, String g, String d, String t) {
bmp = b;
baby_name = n;
baby_gender = g;
date = d;
time = t;
}
public Bitmap getBmp() {
return bmp;
}
public String getBaby_name() {
return baby_name;
}
public String getBaby_gender() {
return baby_gender;
}
public String getDate() {
return date;
}
public String getTime() {
return time;
}
}

You should change your retriveContactsDetails() to this:
public List<Contacts> retriveContactsDetails() {
SQLiteDatabase db = this.getReadableDatabase();
String[] columns = new String[]{KEY_IMAGE, KEY_BABY_NAME, KEY_GENDER, KEY_SET_DATE, KEY_SET_TIME};
List<Contacts> contactsList = new ArrayList<>();
Cursor cursor;
try {
cursor = db.query(TABLE_NAME, columns, null, null, null, null, null);
while(cursor.moveToNext()) {
byte[] blob = cursor.getBlob(cursor.getColumnIndex(KEY_IMAGE));
String name = cursor.getString(cursor.getColumnIndex(KEY_BABY_NAME));
String gender = cursor.getString(cursor.getColumnIndex(KEY_GENDER));
String date = cursor.getString(cursor.getColumnIndex(KEY_SET_DATE));
String time = cursor.getString(cursor.getColumnIndex(KEY_SET_TIME));
contactsList.add(new Contacts(DbUtility.getImage(blob), name, gender, date, time));
Log.d(TAG, DbUtility.getImage(blob) + name + "-" + gender + "-" + date + "- " + time);
}
} catch (Exception ex) {
// Handle exception
} finally {
if(cursor != null) cursor.close();
}
return contactsList;
}
Also, your Contacts class should be named Contact as it contains only a single instance of your object.

public Contacts retriveContactsDetails() {
...
while (cursor.isAfterLast() == false) {
...
cursor.moveToNext();
return new Contacts(...);
}
Your Contacts class is named wrong because it contains only a single contact. It should be named Contact.
The return statement does what it says, it returns from the function. So the loop body cannot be executed more than once.
What you actually want to do is to construct a list of contacts, add one contact object to the list in each loop iteration, and return that list at the end.

How to correctly write big CRUD sqlite android app

I'm writing an app that manipulates with database consists of 3 tables. I created this database from json file using models (Worker model, specialty model) with getters and setters. Now I want to get specific info from this database. I'v already made it but my code is pretty silly. What I need is to change the architecture of my app but I don't know how exactly it should looks like.
This is the examples of my methods, and they are pretty week
This is how I add info into database. I like it, I think it's correct:
public void addWorker(Worker worker){
List<Specialty> specialty;
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
//fixind names
String f_name = fixName(worker.getF_name());
String l_name = fixName(worker.getL_name());
String birthday = fixDate(worker.getBirthday());
values.put(KEY_F_NAME, f_name);
values.put(KEY_L_NAME, l_name);
values.put(KEY_BIRTHDAY, birthday);
values.put(KEY_AVATR_URL, worker.getAvart_url());
specialty = worker.getSpecialty();
long worker_id = db.insert(TABLE_WORKERS,null,values);
//add unique specialty
for (Specialty spec: specialty){
createRelations(worker_id, spec.getSpecialty_id());
if (getCount(spec.getSpecialty_id()) == 0){
addSpecialty(spec);
}
}
}
And this is how I take info from database:
public String[] getFullInfo(String worker_name){
String selectQuery = "HUGE QUERY HERE "where workers.f_name =?";
Log.e(LOG_TAG, selectQuery);
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery(selectQuery, new String [] {worker_name});
String[] details = new String[5];
c.moveToFirst();
while (c.isAfterLast() == false){
details[0] = c.getString(c.getColumnIndex(KEY_F_NAME));
details[1] = c.getString(c.getColumnIndex(KEY_L_NAME));
details[2] = c.getString(c.getColumnIndex(KEY_BIRTHDAY));
details[3] = c.getString(c.getColumnIndex("age"));
details[4] = c.getString(c.getColumnIndex(KEY_SPEC_NAME));
c.moveToNext();
}
return details;
}
This is my another query and it has different return type:
public List<Map<String ,String>> getWorkerListBySpec(String spec_name){
String selectQuery = "HUGE QUERY HERE
"where specialty.spec_name=?";
Log.e(LOG_TAG, selectQuery);
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery(selectQuery, new String [] {spec_name});
//making list of workers
List<Map<String ,String>> data = new ArrayList<Map<String,String>>();
c.moveToFirst();
while (c.isAfterLast() == false){
Map<String,String> datum = new HashMap<String,String>(2);
datum.put(KEY_F_NAME, c.getString(c.getColumnIndex(KEY_F_NAME)));
datum.put(KEY_L_NAME, c.getString(c.getColumnIndex(KEY_L_NAME)));
datum.put(KEY_BIRTHDAY, c.getString(c.getColumnIndex(KEY_BIRTHDAY)));
data.add(datum);
c.moveToNext();
}
return data;
}
and the third one, which also have different return type:
public List<String> getAllSpecs_Names(){
List<String> spec_names = new ArrayList<String>();
String selectQuery = "select * from " + TABLE_SPECIALTY;
Log.e(LOG_TAG, selectQuery);
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery(selectQuery, null);
if (c.moveToFirst()){
do{
spec_names.add(c.getString(c.getColumnIndex(KEY_SPEC_NAME)));
}while (c.moveToNext());
}
return spec_names;
}
I know, that this is all wrong.
Please tell me how I should make all my queries.
It will be good if you give me the link to check how the app should look like

instead of returning a List or Map, you should better return a own CursorWrapper
so you could could look like this:
public WorkerCursor getWorkerListBySpec(String spec_name){
String selectQuery = "HUGE QUERY HERE
"where specialty.spec_name=?";
Log.e(LOG_TAG, selectQuery);
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery(selectQuery, new String [] {spec_name});
return new WorkerCursor(cursor);
}
public static class WorkerCursor extends CursorWrapper {
/**
* Creates a cursor wrapper.
*
* #param cursor The underlying cursor to wrap.
*/
public WorkerCursor(Cursor cursor) {
super(cursor);
}
public Worker getWorker() {
return getWorkerAtCursor();
}
public Worker getWorker(int position) {
if (moveToPosition(position)) {
return getWorkerCursor();
} else {
return null;
}
}
private Worker getWorkerAtCursor() {
if (isBeforeFirst() || isAfterLast()) {
return null;
}
worker worker = new Worker();
worker.name = c.getString(c.getColumnIndex(KEY_F_NAME));
....
return worker;
}
}
and the same for your List, just with a other CursorWrapper
and don't forget to close the CursorWrapper, when it's no more needed, like in onDestroy of Activity and so

How to add SQLite rows to an ArrayList<>

I retrieve all the rows from my SQLite-DB Table
Cursor cursor = db.rawQuery("select * from table",null);
Then I want to add each row to an ArrayList
Please help!

IF you're using custom object array, then use like following :
public void fillDataToArray() {
ArrayList<BeanClass> arrayList = new ArrayList<BeanClass>();
DatabaseHandler db = new DatabaseHandler(getActivity());
db.open();
try
{
Cursor c = db.getImageNameForList();
if (c != null && c.getCount() > 0) {
c.moveToFirst();
for (int count = 0; count < c.getCount(); count++) {
Beanclass detail = new Beanclass ();
detail.setName(c.getString(c
.getColumnIndex(DatabaseHandler._ID)));
detail.setPath(c.getString(c
.getColumnIndexOrThrow(DatabaseHandler._PATH)));
arrayList.add(detail);
c.moveToNext();
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
c.close();
db.close();
}
If you use this in activity, change getActivity() to local context or whichever way you use context in activities.
DATA RETRIEVAL METHOD IN DB ADAPTER CLASS :
> public Cursor getImageNameForList() {
return db.rawQuery("select " + IMAGE_PATH + " from "+ TABLE_PRODUCT_IMAGES , null);
}

Code to do that would look like this, depending on whats in your Table. You have to create a Class that is able to represent a Row in your table.
For example if there are people in your table, with name and age, you will need an object Human(String name, int age) to put into a list.
SQLiteDatabase db = helper.getReadableDatabase();
ArrayList<Human> results = new ArrayList<Human>();
try {
String rawQuery = "Select name, age from people";
Cursor c = db.rawQuery(rawQuery, null);
try {
if (!c.moveToFirst())
return null;
do {
results.add(new Human(c.getString(0),c.getInt(1)));
} while (c.moveToNext());
} finally {
c.close();
}
} finally {
db.close();
}
public class Human {
private String name;
private int age;
public Human (String name, int age) {
this.name = name;
this.age = age;
}
}

In your Db Adapter class, add this method
public ArrayList<String>getData()
{
ArrayList<String>names=new ArrayList<String>();
Cursor c = getReadableDatabase().rawQuery("Select * from tableName", null);
c.moveToFirst();
do
{
String s1=c.getString(c.getColumnIndex("<Column_Name>"));
names.add(s1);
}while(c.moveToNext());
return names;
}
after that in your activity class add this
ArrayList<String> cid;
DB_Adapter database = new DB_Adapter(getApplicationContext(), "<your schema name>", null, 1);
cid=database.getData();
After that add your arraylist to your array adapter which is set to ListView