Get data from cursor android. To make the code more understandable, comments are added.
Get data from cursor android add( new Foo( cursor. cursor) which is returned from SQLiteDatabase. , I take the path from the DATA column, create a file and use Uri. When the row set is first returned the cursor will be at positon -1, which is before the first row. Here is an example of a method that would live inside a SQLiteOpenHelper subclass. In this example, we will see a very easy and common use of the Cursor class, in a Once the cursor’s position is pointing to a valid row, the columns of the row can be read from the cursor. ImageColumns. cursor. getInt(1); Log. ACTION_GET_CONTENT); intent. In the Get Android Studio Core areas Samples User interfaces Background work Data and files Connectivity All core areas ⤵️ Tools and workflow /* * Get the column indexes of the data in the Cursor, * move to the first row in the Cursor, get the data, * and display it. I have made a view. getItem(position); int categoryId = c. So that when i click on that list, it toast the correct id. getReadableDatabase(); final Cursor cursor = database. Improve this answer. I want to show the data in ListView in a new activity. The following rawQuery works and returns the ROWID:-. private String getRealPathFromURI(Uri I am using 3rd party file manager to pick a file (PDF in my case) from the file system. rawQuery("SELECT rowid as _id, title FROM "+tableName +" WHERE rowid = "+id, null); } This method will return only one row. Try this. Even after your app is uninstalled, these files remain on the Since your question says "How to use RecyclerView with a database" and you are not being specific whether you want SQLite or anything else with the RecyclerView, I'll give you a solution that is highly optimal. Cursor must be imported. Here's part of it: public class MyAlphabetizedAdapter extends SimpleCursorAdapter implements SectionIndexer { public ContactAlphabetizedAdapter(Context context, int layout, Cursor cursor, String[] from, int[] to) { mIndexer = new you can just get the data from the cursor as strings and merge them as you like before you save them in the listview. g. you will get the result in an int, so you need to convert that int value to a boolean. how to retrieve data corresponding to particular field from cursor in android? 1. setPlace(cursor. Rewrite your second part of program to: retrieving record from database using cursor in android. Most importantly if you want to know How to View and Locate SQLite Database in Android Studio then please refer to this article. Cursor cursor = theDatabase. or is it possible use mycursor. First, your method getRowCursor() should return a Cursor. getAdapter(). To get the previous data from cursor you can use moveToPrevious() The pointer of this returned reference is pointing to the 0th location which is otherwise called as before the first location of the Cursor, so when you want to retrieve data from the cursor, you have to 1st move to the 1st record so we have to use moveToFirst you can only get Cursor, not LiveData<Cursor>, what you need, however, could be done with MediatorLiveData (or android. below is the working code:- How to get the next data from cursor? To get the next data from cursor you can use moveToNext (). The value of the place in my database is a string,but It returns a number that I have no idea what it is. app_pdf_mime_type)); intent. Contacts table. HAS_PHONE_NUMBER}; Cursor I've following table structure in my SQLite Database. Contributed on Jul 01 2021 . The problem I'm facing is I will always get the latest data in the cursor, meaning if I click the layout on row one I should get grp id 1 and grp name ONE, but I'm getting grp id 3, grp name THREE regardless of which layout I click on in the listview. I need to get the last inserted record from the database after clicking on the Back. getString(1) there's still NullPointerException though it returns "Director" when I set c. getInt(0); } Is this the proper way to get the id of the element that was selected? It seems strange, because I wouldn't think I could use my cursor after the database is closed (which is is after I bind). Most Android developers work with Cursors from time to time. getCount() always return 1. android can't get photo uri from db cursor. JSONObject jFromCursor=new JSONObject(string_in_JSON_format); This is a method in my dataBase-class: public Cursor fetchMessage(String tableNane, int id) { return myDataBase. Not able to get the data from the cursor? 1 <uses-permission android:name="android. query( tableName, tableColumns, whereClause, whereArgs, groupBy, having, orderBy); tableColumns - columns parameter is constructed as follows. But surely I can just reuse the current cursor? I tried doing this: Cursor c = (Cursor) this. Android URI to Cursor. */ int nameIndex = returnCursor. lifecycle. Need help reading from SQLite database for Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog How can I obtain the value of a boolean field in an SQLite database on Android? I usually use getString(), getInt(), etc. How to use Cursor Loader to access retrieved data? 4. getBlob(int columnIndex): Returns the Let’s take a look at an example of how you would usually load some data from a Cursor. Viewed 3k times Get Data from Cursor in Android. Source: stackoverflow. Should I make an adapter class Getting string from SimpleCurstor Adapter using cursor @Override public boolean onSuggestionClick(int position) { //First get cursor from your Adapter, Cursor cursor = (Cursor) mAdapter. Cursors are what contain the result set of a query made against a database in Android. I am using this query to get data from Database using Room but not able to figure out what will be the return type of this query and how to get data from that query @Query("SELECT COUNT(Unit), Age as COUNT from test where Age in (1, 2, 3) and Unit in ("U5", "U6", "U4") group by Age") Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Extend by device; Build apps that give your users seamless experiences from phones to tablets, watches, headsets, and more. getData() so all u need to do is create a file from uri and get its path from getPath() and split it. At first, we tried using Android’s Intent but it would let us select only one audio file at a time. getItem((int) info. It assumes that you'll only get 1 row (if no rows then 0 will be returned). DISPLAY_NAME, ContactsContract. moveToLast() - This will point Chandra as the current data in your cursor. I can use getXXX() to get the content of columns from the cursor, but in my case I want to modify "update" data in the cursor using setXXX() method. You can In the below code, we have used the rawQuery which returns a cursor to get data from the SQLite database through looping. Creating the View Template. Navigate to app > kotlin+java > {package-name}, Right-click on it, New > Kotlin class and name it as DBHelper and add the below code to it. It has asynchronous query support as well without using Loaders or I used the below code to get the "place" value from the "place" column using a cursor. Some Cursor implementations int dataIndex = cursor. To get all the column values. 0. getColumnIndex Using Android's built in method. To read the data, the code in Listing 5. view. Images. for the feedback. I can get the result like this. Android Listview with sqlite and CursorAdapter. When we want to display a series of items into a list, using a custom representation of the items, we need to use our own custom XML layout template for each item. #Try This Still, if you are getting the problem to get the real path, you can try my answers. 44. If it is not empty and the student doesn't already exist I insert the students name and age into the database. get data from cursor android Comment . How can I create a list Array with the cursor data in Android. READ_CONTACTS" /> Match a contact by name and list the results. The Android SQLite query method returns a Cursor object containing the results of the query. Code for generating real path is different according to API levels. It look something like this char firstLetter = mString[firstVisibleItem]. How to retrieve Data from curser. In my SqliteOpenHelper class, I wrote following method. DATABASE_NAME, null, null, null, null, null, null); >>> CHange to Cursor c = mDb. getItem(position); /* Then get string data from cursor's column, I am getting it from column 0 in this case. Ask Question Asked 10 years, 9 months ago. Cursor implementations are not required to be synchronized so code using a Cursor from To read the data, the code in Listing 5. The value is zero-based. Modified 10 years, 9 months ago. I want to display column names with column values in the Listview using cursor. Hot Network Questions You can use the Cursor's get* methods to retrieve values from the result: retrieving record from database using cursor in android. v(TAG, "Current item:" + itemPriority); but the cursor line seems to return just the schema of the database instead of the record I'm after. rawQuery method. obtaining cursor from sqlite database. here's my code: meeting. Thanks so much finally, i found it at this line Cursor c = mDb. GetObject(index) I want to create a dynamic method which returns an object and I only cast it. for eg: Retrieve the Strings from the cursor, form a String which follows the JSON format, and use it to make a json object :. getColumnIndexOrThrow("_id")); }while (cursorOne. public Form getAllForms(){ SQLiteDatabase db = this. query(DATABASE_TABLE, columns,null, null, null, null, null); cursor. The android database API is providing more accurate interface for that. xml & view. DATA); String path = cursor. fooList. getColumnIndex("dataColumnName1"), How to get data from database using cursor in Android? SQLite is an open-source database that is used to store data. Adding data to a database cursor. 2. The loader manager is used to fetch the cursor asynchronously and the cursor is loaded directly into a SimpleCursorAdapter. CATEGORY_OPENABLE); String chooserName = Cursor c = (Cursor)l. string. SQLite Difficulty Retrieving a Value from a Cursor. getString(0) + "," + cursor. _ID, ContactsContract. My present code shows only the column values. When we want the data for the list to be sourced directly from a How should I get the data from "Title"? I tried to use c. String[] columns = new String[]{KEY_ID, KEY_CONTENT}; If we need to get all the fields, how should the column parameter to be constructed. Above answers didn't help me. Fetching values from cursor in android. There are more checks missed out. fromFile(new File(path)); E. mycursor. It’s most likely not the highlight of the week, but there’s usually no getting around it. For example for a table with 3 defined columns (Names, Colour and Age) with no conventional _id column. moveToPosition(id); Get Data from Cursor in Android. Now I have old implementation of Adapter which makes user of Cursor ( Its a CursorAdapter). I know there is no setXXX() methods, but there is CursorWindow object that has this feature. I have read a lot of posts about it, but can't get one to work. cursor count always returns 0 in sqlitedatabase android. This technique tries to match a search string to the name of a contact or contacts in the Contact Provider's ContactsContract. Hot Network Questions Books using the axiomatic method OH my god i love u so mucccchhhhh!!!! u know what i struck here whole day. What procedure should I use to get a ResultSet. 5. getString(1)); cursor. 0 Answers Avg Quality 2/10 TO ADD: In this example I take the text from EditText and when the button is clicked I check if the EditText is empty or not. I have two The way to access data from content providers is to use the LoaderManager to execute the query and bind the cursor result to a list using SimpleCursorAdapter. Here is what I have arrived at after a read of all the answers presented here as well what some Airgram has done in their SDKs - A utility that I have open sourced on Github: Cursor objects returned by database queries are positioned before the first entry, therefore iteration can be simplified to: while (cursor. Retrieving data from SQLite databases in Android is done using Cursors. bindNull(index); When I look at my database using aSQLiteManager it seems that values are correctly stored (empty field for Long column with null value). moveToFirst() then in this case it will point Lalit, as it is the first data in your cursor. Why I did not mention When cursor is returned from a database query it is placed at index -1 that is above the first entry of the cursor so, before using the cursor to get data you have move it to its first position. Reading Cursor Data. getString(cursor. . arch. Once a cursor has been returned from a database query, an I'm using implementation of SimpleCursorAdapter, which implements SectionIndexer. Get Metadata of Audio files using Cursor in Android 15 Aug 2014 on Android We are building a music app and as you would have guessed we would require all the audio metadata. moveToFirst(); do { getID = cursorOne. getString(2). com. moveToNext()) { // Extract data. and I can use for example for a Float or a Cursors. moveToPosition(position); My code is as below: String[] columns = {ContactsContract. The Cursor class has an API that allows an app to read (in a type-safe manner) the columns that were returned from the query i know a Cursor has method for get String, Int, etc but isn't there somethings as. setTables(tableName); Cursor c = I have a query & it will return only one item. To get the previous data from cursor you can use moveToPrevious A Cursor represents the result of a query and basically points to one row of the query result. Just a simple update on the first answer: mActivity. It uses cursor. rawQuery("SELECT * FROM Task", null); Inside the getView method you should use something like this. getString I am trying to get data from my SQLite database in Android using this query. However how to read value from cursor keeping null information? If I use: cursor. GetString(index) for any type?String,Float,Double,Long,Short, Blob,Int,etc. public String getValueFromColumn(int position, String tableName, String columnToGetValueFrom) { SQLiteDatabase db = getReadableDatabase(); SQLiteQueryBuilder qb = new SQLiteQueryBuilder(); qb. It also closes the cursor (you should close a cursor when done with it). For documents table I have defined Entity class Document, when I query getAll() it returns me all the document. It checks that a row has been returned and only then does it try to get the data. I've updated the code with the new method. If you want every column and every row, then just pass in null for the SQLiteDatabase column and selection parameters. In my DocumentDao class I defined one method to get list of cursor objects I have a layout for my list row with some text and a layout which is supposed to emulate a button. Explanation:- This method gets the URI and then check the API level of your Android device after that according to API level it will generate the Real path. I am presuming the cursor returned by the getCursor() method is correctly retrieving all the rows for your table, you have to explicitly move the cursor to a position before accessing the data for a row, so at the beginning of your getView() method you have to call. fromFile. I am trying to get the last inserted rowid from a sqlite database in Android. moveToNext()); I want know is there any fastest way to get the data or this is the Thanks, @OleV. database. Yes, SQLite does not have any datetime datatype and probably that is why the other answer has suggested to store and retrieve the milliseconds since the epoch. TABLE_NAME_PLACE, null, null, null, null, null, null); – Cursor cursor = sqLiteDatabase. Could someone please shed some Now run your app and see the output of the app. Once the query is complete I have to display the results on a Google Map. When an @Insert method is called, Room inserts each passed entity instance into the corresponding database table. Cursor cursor = db. In my app the user is to select an audio file which the app then handles. moveToLast(); Share. Transformations) – pskink Commented Aug 5, 2017 at 17:15 I have a one table question_table and one ImageButton (Back). Now I am not getting how to get data from cursor and show it on ListView . Iterate cursor inside for loop SQLite android. The query itself is fast enough. But, as you can see in my code, I am using DATA contant to get Uri so I can't pass the Uri to openFileDescriptor() method and don't know what String arguments to be passed to openFileDescriptor(). Cursor only retrieving one item, not all items. SQLite is a lightweight database that comes with Android OS. The table is populated with data from a text file that contains a word and definition pair on each line in the file. Add the contents of one Cursor to another Cursor. Null-pointer exception in Cursor Adapter. To provide a more enriched user experience, many apps let users contribute and access media that's available on an external storage volume. In Android development, any time you want to show a vertical list of items you will want to use a ListView which is populated using an Adapter to a data source. The framework provides an optimized index into media collections, called the media store, that lets users retrieve and update these media files more easily. query(TABLE_NAME, null, null, null, null, null, null, null); More details. You need to handle this in a different way. getReadableDatabase(); Cursor Get the latest; Stay in touch with the latest releases throughout the year, join our preview programs, and give us your feedback. Android SQLite get all data from cursor fast. Not able to get the data from the cursor? 0. Link to this answer Share Copy Link . rawQuery("SELECT name FROM contacts", null); To create this database table, we would use SQLite persistence or an ORM that allows us to define objects mapped to tables. parse() will not be required. 10 uses two methods from the cursor class: Cursor. charAt(0); – Using Cursor methods, you can iterate over the rows in the results, determine the data type of each column, get the data out of a column, and examine other properties of the results. Provide details and share your research! But avoid . Share . getListAdapter(). 1 Popularity 7/10 Helpfulness 7/10 Language whatever. getColumnIndex(MediaStore. I create one method in database but it's not working. I have a database with somewhat around 10k entries. The Cursor class has an API that allows an app to read (in a type-safe manner) the columns that were returned from the query as well as iterate over the rows of the result set. Get data from Cursor: null pointer exception. However, I can't seem to use it . final SQLiteDatabase database = this. For that add cursor. Returns the current position of the cursor in the row set. V. You can't convert the contents of a cursor directly into a JSONObject, but you can do that with some logic. query(Constants. MoveToFirst(); after Cursor cursor = getReadableDatabase(). It uses the searchTerm String to filter the results, iterates through the Cursor's contents, and returns This interface provides random read-write access to the result set returned by a database query. query( // Name of the table to read from TABLE_NAME, // String array of the columns which are supposed to be read new Basically i need a way to get my cursor id, that is the id from the database for my table parsed to the custom adapter. public void openAndQueryDatabase() { db = openOrCreateDatabase( " I have a Cursor returned From a SQLiteDataBase object. Unfortunately, As far as I know, there is no way that you can manually add data to the cursor. Mobile Development Collective Join the discussion. Create the Virtual Table. java to show data but I don't know how to show data on that activity. moveToLast – This will point Chandra as the current data in your cursor. getString(), but when I ask for c. Since the OP has accepted that answer, I assumed that it fulfilled the requirement. Follow answered Jun 29, 2012 at 15:50. The role of the content provider in the android system is like a central repository in which data of the applications are stored, and it facilitates other applications to securely access and modifies that data based on the user Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Tags: android cursor get whatever. Thanks to the answers above I created the following method to give the value of an item from another column but in the same row. Hot Network Questions Choice of imperative verb when followed by « s'il vous plaît » or by « s'il te plaît » Extend by device; Build apps that give your users seamless experiences from phones to tablets, watches, headsets, and more. To create a virtual table, create a class for the table: I would like to get the data "KEY_SUM", but it is failure to get it. Contacts. How can I do so ? retrieving record from database using cursor in android. HforHisham I have GridView and using SimpleCursorAdapter with it to show data from database. Hamza javed. to get the values of my fields, but there does not seem to be a getBoolean() boolean datatype is not available in Cursor. This is how I launch the activity: Intent intent = new Intent(Intent. Been searching, but not finding a way to connect to the public List<Product> searchForProducts(String searchTerm) { // When reading data one should always just get a readable database. To make the code more understandable, comments are added. How to retrieve data from a cursor in android? 3. getColumnIndexOrThrow(columnName); if For this reason, Android has the Cursor interface, that provides random read-write access to the result set returned by a database query. And you can see below this is how the data stored in the SQLite database. setType(getString(R. I want to get data which associated with current element when I clicked to item on GridView. addCategory(Intent. Output: After successfully executed the code enter the required data inside the EditText. The other answers use rawQuery, but you can use Android's built in SQLiteDatabase. 3. Cursors Cursors are what contain the result set of a query made against a database in Android. DBHelper. My row contains the following columns: question, optionA, optionB, optionC, optionD, and I need the data for use on my Activity. Design UI: Step 3: Creating a new class for SQLite operations. public static Object GetValueFromCursor( Cursor cursor, String columnName, Class propertyClass) { int columnIndex = cursor. 1. To get the next data from cursor you can use moveToNext(). As long as the TABLE is not defined using WITHOUT ROWID you can get the ROWID (or should that be rowid see below for case) if you specify it as a column to be retrieved. getString(cursorOne. setTag(data); // you can pass here your specific data for each item Supposing your data is just an integer, then you can get this value from the onItemClick() in this way: @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Integer data = (Integer) Thanks Stéphane, I'm currently using a Android cursor object (android. If I do this. id); String itemPriority = c. Cursor csr = This is my main class and simply inserting the data and showing the data in Logcat. NOTE: The following approach is considered deprecated. kt: Kotlin openFileDescriptor() method requires Uri and String. issue fetching data from sqlite android. In my activity I wrote this: Cursor cursor = myDbHelper. I am trying to chnage my code to make use of room database APIs. Also, there was a setback if the user had disabled the default music Hi, The important thing I want to do is display "Fist character" in my List. I query for elements using the default query method from the SQLiteDatabase-class. A virtual table behaves similarly to a SQLite table, but reads and writes to an object in memory via callbacks, instead of to a database file. Android sqlite Cursor. android; sqlite; database-cursor; See similar questions with these tags. String example = (cursor. getLong(7) In Android , Content Providers are a very important component that serves the purpose of a relational database to store the data of applications. getString(dataIndex); final Uri uri = Uri. So, in that case Instant. The problem is that in order for the app to do what I want it to do with the audio files, I need the URI to be in file format. For that I generate a result array from the cursor which holds the marker information. fetchMessage(tableName, id); Get Data from Cursor in Android. After the last row is returned another call to next() will leave the cursor past the last entry, at a position of count(). Android - Efficient way using the Basically it is never a good idea to construct database queries like you do. I'll be using Realm as database and let you display all the data inside your RecyclerView. getColumnIndexOrThrow () and one of the type get () methods from the Cursor class. You usually want to display the results in a ListView, to allow the user to choose among the Each parameter for an @Insert method must be either an instance of a Room data entity class annotated with @Entity or a collection of data entity class instances, each of which points to a database. managedQuery() is now deprecated. getColumnIndex("place"))); You are not moving within the cursor so it's at position -1 (before the first row) Use the following this moves to the first row in the cursor (if there is one, if not an empty string will be returned) :- The PathUtil method will be only working in below oreo and if it is oreo than it is likely to crash because in oreo we will not get the id but the entire path in data. 10 uses two methods from the cursor class: How to get values from cursor in android? The Cursor class contains the following methods for retrieving data from a row: byte[] Cursor. moveToFirst() - If you use cursor. getInt() to get the integer value rather than convert it from a string to int. permission. rawQuery("SELECT * FROM Task where taskId = 1 ", null); However the cursor is returned empty, a taskId with value 1 exists. Asking for help, clarification, or responding to other answers. If the @Insert method receives a single How do I return a cursor based on the position of entry. Also, you should not close the returned cursor because I assume that you want to use its results somehow. The accepted answer is not complete. cursorOne. To use Cursors android. Here is what i've got so far When saving data to SQLite database if Object is null I use: statement. After I get all data from cursor, I don't know how to convert it to an String[] Array to get "First character". wbynyyseczoucvvxfogecnifohzbjxbbsjydkqwjifqnruwjdwzyokxzcusqrychgnxoreime
Get data from cursor android add( new Foo( cursor. cursor) which is returned from SQLiteDatabase. , I take the path from the DATA column, create a file and use Uri. When the row set is first returned the cursor will be at positon -1, which is before the first row. Here is an example of a method that would live inside a SQLiteOpenHelper subclass. In this example, we will see a very easy and common use of the Cursor class, in a Once the cursor’s position is pointing to a valid row, the columns of the row can be read from the cursor. ImageColumns. cursor. getInt(1); Log. ACTION_GET_CONTENT); intent. In the Get Android Studio Core areas Samples User interfaces Background work Data and files Connectivity All core areas ⤵️ Tools and workflow /* * Get the column indexes of the data in the Cursor, * move to the first row in the Cursor, get the data, * and display it. I have made a view. getItem(position); int categoryId = c. So that when i click on that list, it toast the correct id. getReadableDatabase(); final Cursor cursor = database. Improve this answer. I want to show the data in ListView in a new activity. The following rawQuery works and returns the ROWID:-. private String getRealPathFromURI(Uri I am using 3rd party file manager to pick a file (PDF in my case) from the file system. rawQuery("SELECT rowid as _id, title FROM "+tableName +" WHERE rowid = "+id, null); } This method will return only one row. Try this. Even after your app is uninstalled, these files remain on the Since your question says "How to use RecyclerView with a database" and you are not being specific whether you want SQLite or anything else with the RecyclerView, I'll give you a solution that is highly optimal. Cursor must be imported. Here's part of it: public class MyAlphabetizedAdapter extends SimpleCursorAdapter implements SectionIndexer { public ContactAlphabetizedAdapter(Context context, int layout, Cursor cursor, String[] from, int[] to) { mIndexer = new you can just get the data from the cursor as strings and merge them as you like before you save them in the listview. g. you will get the result in an int, so you need to convert that int value to a boolean. how to retrieve data corresponding to particular field from cursor in android? 1. setPlace(cursor. Rewrite your second part of program to: retrieving record from database using cursor in android. Most importantly if you want to know How to View and Locate SQLite Database in Android Studio then please refer to this article. Cursor cursor = theDatabase. or is it possible use mycursor. First, your method getRowCursor() should return a Cursor. getAdapter(). To get the previous data from cursor you can use moveToPrevious() The pointer of this returned reference is pointing to the 0th location which is otherwise called as before the first location of the Cursor, so when you want to retrieve data from the cursor, you have to 1st move to the 1st record so we have to use moveToFirst you can only get Cursor, not LiveData<Cursor>, what you need, however, could be done with MediatorLiveData (or android. below is the working code:- How to get the next data from cursor? To get the next data from cursor you can use moveToNext (). The value of the place in my database is a string,but It returns a number that I have no idea what it is. app_pdf_mime_type)); intent. Contacts table. HAS_PHONE_NUMBER}; Cursor I've following table structure in my SQLite Database. Contributed on Jul 01 2021 . The problem I'm facing is I will always get the latest data in the cursor, meaning if I click the layout on row one I should get grp id 1 and grp name ONE, but I'm getting grp id 3, grp name THREE regardless of which layout I click on in the listview. I need to get the last inserted record from the database after clicking on the Back. getString(1) there's still NullPointerException though it returns "Director" when I set c. getInt(0); } Is this the proper way to get the id of the element that was selected? It seems strange, because I wouldn't think I could use my cursor after the database is closed (which is is after I bind). Most Android developers work with Cursors from time to time. getCount() always return 1. android can't get photo uri from db cursor. JSONObject jFromCursor=new JSONObject(string_in_JSON_format); This is a method in my dataBase-class: public Cursor fetchMessage(String tableNane, int id) { return myDataBase. Not able to get the data from the cursor? 1 <uses-permission android:name="android. query( tableName, tableColumns, whereClause, whereArgs, groupBy, having, orderBy); tableColumns - columns parameter is constructed as follows. But surely I can just reuse the current cursor? I tried doing this: Cursor c = (Cursor) this. Android URI to Cursor. */ int nameIndex = returnCursor. lifecycle. Need help reading from SQLite database for Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog How can I obtain the value of a boolean field in an SQLite database on Android? I usually use getString(), getInt(), etc. How to use Cursor Loader to access retrieved data? 4. getBlob(int columnIndex): Returns the Let’s take a look at an example of how you would usually load some data from a Cursor. Viewed 3k times Get Data from Cursor in Android. Source: stackoverflow. Should I make an adapter class Getting string from SimpleCurstor Adapter using cursor @Override public boolean onSuggestionClick(int position) { //First get cursor from your Adapter, Cursor cursor = (Cursor) mAdapter. Cursors are what contain the result set of a query made against a database in Android. I am using this query to get data from Database using Room but not able to figure out what will be the return type of this query and how to get data from that query @Query("SELECT COUNT(Unit), Age as COUNT from test where Age in (1, 2, 3) and Unit in ("U5", "U6", "U4") group by Age") Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Extend by device; Build apps that give your users seamless experiences from phones to tablets, watches, headsets, and more. getData() so all u need to do is create a file from uri and get its path from getPath() and split it. At first, we tried using Android’s Intent but it would let us select only one audio file at a time. getItem((int) info. It assumes that you'll only get 1 row (if no rows then 0 will be returned). DISPLAY_NAME, ContactsContract. moveToLast() - This will point Chandra as the current data in your cursor. I can use getXXX() to get the content of columns from the cursor, but in my case I want to modify "update" data in the cursor using setXXX() method. You can In the below code, we have used the rawQuery which returns a cursor to get data from the SQLite database through looping. Creating the View Template. Navigate to app > kotlin+java > {package-name}, Right-click on it, New > Kotlin class and name it as DBHelper and add the below code to it. It has asynchronous query support as well without using Loaders or I used the below code to get the "place" value from the "place" column using a cursor. Some Cursor implementations int dataIndex = cursor. To get all the column values. 0. getColumnIndex Using Android's built in method. To read the data, the code in Listing 5. view. Images. for the feedback. I can get the result like this. Android Listview with sqlite and CursorAdapter. When we want to display a series of items into a list, using a custom representation of the items, we need to use our own custom XML layout template for each item. #Try This Still, if you are getting the problem to get the real path, you can try my answers. 44. If it is not empty and the student doesn't already exist I insert the students name and age into the database. get data from cursor android Comment . How can I create a list Array with the cursor data in Android. READ_CONTACTS" /> Match a contact by name and list the results. The Android SQLite query method returns a Cursor object containing the results of the query. Code for generating real path is different according to API levels. It look something like this char firstLetter = mString[firstVisibleItem]. How to retrieve Data from curser. In my SqliteOpenHelper class, I wrote following method. DATABASE_NAME, null, null, null, null, null, null); >>> CHange to Cursor c = mDb. getItem(position); /* Then get string data from cursor's column, I am getting it from column 0 in this case. Ask Question Asked 10 years, 9 months ago. Cursor implementations are not required to be synchronized so code using a Cursor from To read the data, the code in Listing 5. The value is zero-based. Modified 10 years, 9 months ago. I want to display column names with column values in the Listview using cursor. Hot Network Questions You can use the Cursor's get* methods to retrieve values from the result: retrieving record from database using cursor in android. v(TAG, "Current item:" + itemPriority); but the cursor line seems to return just the schema of the database instead of the record I'm after. rawQuery method. obtaining cursor from sqlite database. here's my code: meeting. Thanks so much finally, i found it at this line Cursor c = mDb. GetObject(index) I want to create a dynamic method which returns an object and I only cast it. for eg: Retrieve the Strings from the cursor, form a String which follows the JSON format, and use it to make a json object :. getColumnIndexOrThrow("_id")); }while (cursorOne. public Form getAllForms(){ SQLiteDatabase db = this. query(DATABASE_TABLE, columns,null, null, null, null, null); cursor. The android database API is providing more accurate interface for that. xml & view. DATA); String path = cursor. fooList. getColumnIndex("dataColumnName1"), How to get data from database using cursor in Android? SQLite is an open-source database that is used to store data. Adding data to a database cursor. 2. The loader manager is used to fetch the cursor asynchronously and the cursor is loaded directly into a SimpleCursorAdapter. CATEGORY_OPENABLE); String chooserName = Cursor c = (Cursor)l. string. SQLite Difficulty Retrieving a Value from a Cursor. getString(0) + "," + cursor. _ID, ContactsContract. My present code shows only the column values. When we want the data for the list to be sourced directly from a How should I get the data from "Title"? I tried to use c. String[] columns = new String[]{KEY_ID, KEY_CONTENT}; If we need to get all the fields, how should the column parameter to be constructed. Above answers didn't help me. Fetching values from cursor in android. There are more checks missed out. fromFile(new File(path)); E. mycursor. It’s most likely not the highlight of the week, but there’s usually no getting around it. For example for a table with 3 defined columns (Names, Colour and Age) with no conventional _id column. moveToPosition(id); Get Data from Cursor in Android. Now I have old implementation of Adapter which makes user of Cursor ( Its a CursorAdapter). I know there is no setXXX() methods, but there is CursorWindow object that has this feature. I have read a lot of posts about it, but can't get one to work. cursor count always returns 0 in sqlitedatabase android. This technique tries to match a search string to the name of a contact or contacts in the Contact Provider's ContactsContract. Hot Network Questions Books using the axiomatic method OH my god i love u so mucccchhhhh!!!! u know what i struck here whole day. What procedure should I use to get a ResultSet. 5. getString(1)); cursor. 0 Answers Avg Quality 2/10 TO ADD: In this example I take the text from EditText and when the button is clicked I check if the EditText is empty or not. I have two The way to access data from content providers is to use the LoaderManager to execute the query and bind the cursor result to a list using SimpleCursorAdapter. Here is what I have arrived at after a read of all the answers presented here as well what some Airgram has done in their SDKs - A utility that I have open sourced on Github: Cursor objects returned by database queries are positioned before the first entry, therefore iteration can be simplified to: while (cursor. Retrieving data from SQLite databases in Android is done using Cursors. bindNull(index); When I look at my database using aSQLiteManager it seems that values are correctly stored (empty field for Long column with null value). moveToFirst() then in this case it will point Lalit, as it is the first data in your cursor. Why I did not mention When cursor is returned from a database query it is placed at index -1 that is above the first entry of the cursor so, before using the cursor to get data you have move it to its first position. Reading Cursor Data. getString(cursor. . arch. Once a cursor has been returned from a database query, an I'm using implementation of SimpleCursorAdapter, which implements SectionIndexer. Get Metadata of Audio files using Cursor in Android 15 Aug 2014 on Android We are building a music app and as you would have guessed we would require all the audio metadata. moveToFirst(); do { getID = cursorOne. getString(2). com. moveToNext()) { // Extract data. and I can use for example for a Float or a Cursors. moveToPosition(position); My code is as below: String[] columns = {ContactsContract. The Cursor class has an API that allows an app to read (in a type-safe manner) the columns that were returned from the query i know a Cursor has method for get String, Int, etc but isn't there somethings as. setTables(tableName); Cursor c = I have a query & it will return only one item. To get the previous data from cursor you can use moveToPrevious A Cursor represents the result of a query and basically points to one row of the query result. Just a simple update on the first answer: mActivity. It uses cursor. rawQuery("SELECT * FROM Task", null); Inside the getView method you should use something like this. getString I am trying to get data from my SQLite database in Android using this query. However how to read value from cursor keeping null information? If I use: cursor. GetString(index) for any type?String,Float,Double,Long,Short, Blob,Int,etc. public String getValueFromColumn(int position, String tableName, String columnToGetValueFrom) { SQLiteDatabase db = getReadableDatabase(); SQLiteQueryBuilder qb = new SQLiteQueryBuilder(); qb. It also closes the cursor (you should close a cursor when done with it). For documents table I have defined Entity class Document, when I query getAll() it returns me all the document. It checks that a row has been returned and only then does it try to get the data. I've updated the code with the new method. If you want every column and every row, then just pass in null for the SQLiteDatabase column and selection parameters. In my DocumentDao class I defined one method to get list of cursor objects I have a layout for my list row with some text and a layout which is supposed to emulate a button. Explanation:- This method gets the URI and then check the API level of your Android device after that according to API level it will generate the Real path. I am presuming the cursor returned by the getCursor() method is correctly retrieving all the rows for your table, you have to explicitly move the cursor to a position before accessing the data for a row, so at the beginning of your getView() method you have to call. fromFile. I am trying to get the last inserted rowid from a sqlite database in Android. moveToNext()); I want know is there any fastest way to get the data or this is the Thanks, @OleV. database. Yes, SQLite does not have any datetime datatype and probably that is why the other answer has suggested to store and retrieve the milliseconds since the epoch. TABLE_NAME_PLACE, null, null, null, null, null, null); – Cursor cursor = sqLiteDatabase. Could someone please shed some Now run your app and see the output of the app. Once the query is complete I have to display the results on a Google Map. When an @Insert method is called, Room inserts each passed entity instance into the corresponding database table. Cursor cursor = db. In my app the user is to select an audio file which the app then handles. moveToLast(); Share. Transformations) – pskink Commented Aug 5, 2017 at 17:15 I have a one table question_table and one ImageButton (Back). Now I am not getting how to get data from cursor and show it on ListView . Iterate cursor inside for loop SQLite android. The query itself is fast enough. But, as you can see in my code, I am using DATA contant to get Uri so I can't pass the Uri to openFileDescriptor() method and don't know what String arguments to be passed to openFileDescriptor(). Cursor only retrieving one item, not all items. SQLite is a lightweight database that comes with Android OS. The table is populated with data from a text file that contains a word and definition pair on each line in the file. Add the contents of one Cursor to another Cursor. Null-pointer exception in Cursor Adapter. To provide a more enriched user experience, many apps let users contribute and access media that's available on an external storage volume. In Android development, any time you want to show a vertical list of items you will want to use a ListView which is populated using an Adapter to a data source. The framework provides an optimized index into media collections, called the media store, that lets users retrieve and update these media files more easily. query(TABLE_NAME, null, null, null, null, null, null, null); More details. You need to handle this in a different way. getReadableDatabase(); Cursor Get the latest; Stay in touch with the latest releases throughout the year, join our preview programs, and give us your feedback. Android SQLite get all data from cursor fast. Not able to get the data from the cursor? 0. Link to this answer Share Copy Link . rawQuery("SELECT name FROM contacts", null); To create this database table, we would use SQLite persistence or an ORM that allows us to define objects mapped to tables. parse() will not be required. 10 uses two methods from the cursor class: Cursor. charAt(0); – Using Cursor methods, you can iterate over the rows in the results, determine the data type of each column, get the data out of a column, and examine other properties of the results. Provide details and share your research! But avoid . Share . getListAdapter(). 1 Popularity 7/10 Helpfulness 7/10 Language whatever. getColumnIndex(MediaStore. I create one method in database but it's not working. I have a database with somewhat around 10k entries. The Cursor class has an API that allows an app to read (in a type-safe manner) the columns that were returned from the query as well as iterate over the rows of the result set. Get data from Cursor: null pointer exception. However, I can't seem to use it . final SQLiteDatabase database = this. For that add cursor. Returns the current position of the cursor in the row set. V. You can't convert the contents of a cursor directly into a JSONObject, but you can do that with some logic. query(Constants. MoveToFirst(); after Cursor cursor = getReadableDatabase(). It uses the searchTerm String to filter the results, iterates through the Cursor's contents, and returns This interface provides random read-write access to the result set returned by a database query. query( // Name of the table to read from TABLE_NAME, // String array of the columns which are supposed to be read new Basically i need a way to get my cursor id, that is the id from the database for my table parsed to the custom adapter. public void openAndQueryDatabase() { db = openOrCreateDatabase( " I have a Cursor returned From a SQLiteDataBase object. Unfortunately, As far as I know, there is no way that you can manually add data to the cursor. Mobile Development Collective Join the discussion. Create the Virtual Table. java to show data but I don't know how to show data on that activity. moveToLast – This will point Chandra as the current data in your cursor. getString(), but when I ask for c. Since the OP has accepted that answer, I assumed that it fulfilled the requirement. Follow answered Jun 29, 2012 at 15:50. The role of the content provider in the android system is like a central repository in which data of the applications are stored, and it facilitates other applications to securely access and modifies that data based on the user Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Tags: android cursor get whatever. Thanks to the answers above I created the following method to give the value of an item from another column but in the same row. Hot Network Questions Choice of imperative verb when followed by « s'il vous plaît » or by « s'il te plaît » Extend by device; Build apps that give your users seamless experiences from phones to tablets, watches, headsets, and more. To create a virtual table, create a class for the table: I would like to get the data "KEY_SUM", but it is failure to get it. Contacts. How can I do so ? retrieving record from database using cursor in android. HforHisham I have GridView and using SimpleCursorAdapter with it to show data from database. Hamza javed. to get the values of my fields, but there does not seem to be a getBoolean() boolean datatype is not available in Cursor. This is how I launch the activity: Intent intent = new Intent(Intent. Been searching, but not finding a way to connect to the public List<Product> searchForProducts(String searchTerm) { // When reading data one should always just get a readable database. To make the code more understandable, comments are added. How to retrieve data from a cursor in android? 3. getColumnIndexOrThrow(columnName); if For this reason, Android has the Cursor interface, that provides random read-write access to the result set returned by a database query. And you can see below this is how the data stored in the SQLite database. setType(getString(R. I want to get data which associated with current element when I clicked to item on GridView. addCategory(Intent. Output: After successfully executed the code enter the required data inside the EditText. The other answers use rawQuery, but you can use Android's built in SQLiteDatabase. 3. Cursors Cursors are what contain the result set of a query made against a database in Android. DBHelper. My row contains the following columns: question, optionA, optionB, optionC, optionD, and I need the data for use on my Activity. Design UI: Step 3: Creating a new class for SQLite operations. public static Object GetValueFromCursor( Cursor cursor, String columnName, Class propertyClass) { int columnIndex = cursor. 1. To get the next data from cursor you can use moveToNext(). As long as the TABLE is not defined using WITHOUT ROWID you can get the ROWID (or should that be rowid see below for case) if you specify it as a column to be retrieved. getString(cursorOne. setTag(data); // you can pass here your specific data for each item Supposing your data is just an integer, then you can get this value from the onItemClick() in this way: @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Integer data = (Integer) Thanks Stéphane, I'm currently using a Android cursor object (android. If I do this. id); String itemPriority = c. Cursor csr = This is my main class and simply inserting the data and showing the data in Logcat. NOTE: The following approach is considered deprecated. kt: Kotlin openFileDescriptor() method requires Uri and String. issue fetching data from sqlite android. In my activity I wrote this: Cursor cursor = myDbHelper. I am trying to chnage my code to make use of room database APIs. Also, there was a setback if the user had disabled the default music Hi, The important thing I want to do is display "Fist character" in my List. I query for elements using the default query method from the SQLiteDatabase-class. A virtual table behaves similarly to a SQLite table, but reads and writes to an object in memory via callbacks, instead of to a database file. Android sqlite Cursor. android; sqlite; database-cursor; See similar questions with these tags. String example = (cursor. getLong(7) In Android , Content Providers are a very important component that serves the purpose of a relational database to store the data of applications. getString(dataIndex); final Uri uri = Uri. So, in that case Instant. The problem is that in order for the app to do what I want it to do with the audio files, I need the URI to be in file format. For that I generate a result array from the cursor which holds the marker information. fetchMessage(tableName, id); Get Data from Cursor in Android. After the last row is returned another call to next() will leave the cursor past the last entry, at a position of count(). Android - Efficient way using the Basically it is never a good idea to construct database queries like you do. I'll be using Realm as database and let you display all the data inside your RecyclerView. getColumnIndexOrThrow () and one of the type get () methods from the Cursor class. You usually want to display the results in a ListView, to allow the user to choose among the Each parameter for an @Insert method must be either an instance of a Room data entity class annotated with @Entity or a collection of data entity class instances, each of which points to a database. managedQuery() is now deprecated. getColumnIndex("place"))); You are not moving within the cursor so it's at position -1 (before the first row) Use the following this moves to the first row in the cursor (if there is one, if not an empty string will be returned) :- The PathUtil method will be only working in below oreo and if it is oreo than it is likely to crash because in oreo we will not get the id but the entire path in data. 10 uses two methods from the cursor class: How to get values from cursor in android? The Cursor class contains the following methods for retrieving data from a row: byte[] Cursor. moveToFirst() - If you use cursor. getInt() to get the integer value rather than convert it from a string to int. permission. rawQuery("SELECT * FROM Task where taskId = 1 ", null); However the cursor is returned empty, a taskId with value 1 exists. Asking for help, clarification, or responding to other answers. If the @Insert method receives a single How do I return a cursor based on the position of entry. Also, you should not close the returned cursor because I assume that you want to use its results somehow. The accepted answer is not complete. cursorOne. To use Cursors android. Here is what i've got so far When saving data to SQLite database if Object is null I use: statement. After I get all data from cursor, I don't know how to convert it to an String[] Array to get "First character". wbynyy secz oucvv xfoge cnifoh zbjxb bsjyd kqwji fqnru wjd wzyo kxzcus qrych gnx oreime