Android provides easy way to manage structured data in SQLite database. It has full support for SQLite database. Any databases you create will be accessible by name to any class in the application, but not outside the application.

<string name="onClick">onClick</string>

<?xml  version="1.0" encoding="utf-8"?>
<LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="horizontal"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent">
     <Button android:id="@+id/btnInsert"
               android:text="Insert"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:onClick="onClick"/>
     <Button android:id="@+id/btnUpdate"
               android:text="Update"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:onClick="onClick"/>
     <Button android:id="@+id/btnDelete"
               android:text="Delete"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:onClick="onClick"/>
</LinearLayout>

import android.app.Activity;
import android.content.ContentValues;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
  
public class DatabaseActivity  extends Activity {
    
private SQLiteDatabase  db;
  
        private String  table_name="StudentInfo";
        private String  database_name="Test.db";
       
        public static final String  KEY_ROWID =  "sid";
        public static final String  KEY_NAME =  "name";
        public static final String  KEY_AGE =  "age";
        public static final String  KEY_COURSE =  "course";
       
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
        
         // create or open database file
         db = openOrCreateDatabase(database_name , SQLiteDatabase.CREATE_IF_NECESSARY,   
                                                                                
                                                                                null);
         db.setVersion(1);
         db.setLocale(Locale.getDefault());
         db.setLockingEnabled(true);
        
         // creating table in database
         db.execSQL("CREATE TABLE IF NOT EXISTS "+table_name+" " +
                         "( sid INTEGER PRIMARY KEY AUTOINCREMENT," +
                         "  name TEXT," +
                         "  age INTEGER," +
                         "  course TEXT ); ");
    }
    
     // capture button id and perform function
     public void onClick(View v)
    {
         switch(v.getId())
        {
                case R.id.btnInsert:
                      Insert("Rohit",  "19",  "BBA");
                       break;
                case R.id.btnUpdate:
                      Update(1,  "Rohit",  "20",  "BCA");
                       break;
                case R.id.btnDelete:
                      Delete(1);
                       break;
        }
    }
    
     // inserting record in the database
     public void Insert(String name, String age, String course)
    {
        ContentValues data=createContentValues(name, age, course);
         db.insert(table_name,  null, data);
        Toast.makeText(this,  "Record Inserted", Toast.LENGTH_SHORT).show();
    }
    
     // updating record in the database
     public void Update(int sid, String name, String age, String course)
    {
        ContentValues updateValues = createContentValues(name, age,    course);
         db.update(table_name, updateValues,  KEY_ROWID+"="+sid,  null);
        Toast.makeText(this,  "Record Updated", Toast.LENGTH_SHORT).show();
    }
    
     // deleting record rom the database
     public void Delete(int sid)
    {
         db.delete(table_name,  KEY_ROWID+"="+sid,  null);
        Toast.makeText(this,  "Record Deleted", Toast.LENGTH_SHORT).show();
    }
    
     // return a content of the database
     private ContentValues createContentValues(String name, String age, String course)     
     {
    {
              ContentValues values =  new ContentValues();
              values.put(KEY_NAME, name);
              values.put(KEY_AGE, age);
              values.put(KEY_COURSE, course);
               return values;
    }
}