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Database with Cursor Adapter

 

Database with Cursor Adapter

Retrieving data from the database and showing in listview:

1) Create a method in Database class\

2) Open database by calling getReadableDatabase()

3) Create a query in the form of String

4) Execute the query using raqQuery method, which returns Cursor object
public class MyDatabase extends SQLiteOpenHelper

{

| | |    public Cursor getAllStudents()

{

SQLiteDatabase database = getReadableDatabase();

String query = “SELECT * FROM STUDENT”;

Cursor cursor = database.rawQuery(query, null);

return cursor;

}}

To show the above data in ListView,

1) Create a list item in XML and provide ids to views

2) Create a CursorAdapter object as follows Requires column names in the form of String array ids of list item in the form of int[]

3) Set the adapter to listview as mentioned in below method
public void showList()

{

MyDatabase database = new MyDatabase(this);

Cursor cursor = database.getAllStudents();

String[] from = {“NAME”, “ROLLNO”, “MARKS”};

int[] to = {R.id.textName, R.id.textRNo, R.id.textMarks};

CursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.list_item, cursor, from, to, Adapter.IGNORE_ITEM_VIEW_TYPE);        studentsList.setAdapter(adapter);

}

Create an Android application to work with retrieving data from database and showing ListView
Refer the following link

 

Related topics:

  1. ListView
  2. Custom List View
  3. SQLiteDatabase
  4. RecyclerView
  5. Php tutorials

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