SQLiteOpenHelper.java

package com.example.meuPacoteMobile;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DatabaseHelper extends SQLiteOpenHelper {

    private static final String DATABASE_NAME = "clientesData.db";
    private static final String TABLE_NAME = "people_table";
    private static final String COL_1 = "ID";
    private static final String COL_2 = "NAME";
    private static final String COL_3 = "EMAIL";

    public DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE " + TABLE_NAME + "(ID INTEGER PRIMARY KEY AUTOINCREMENT, NAME TEXT, EMAIL TEXT)");
        insertClientesData(db);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(db);
    }

    private void insertClientesData(SQLiteDatabase db) {
        insertData(db, "Alice", "alice@example.com");
        insertData(db, "Bob", "bob@example.com");
        insertData(db, "Joaquim", "joaquim@example.com");
        insertData(db, "Maria", "maria@example.com");
        insertData(db, "Eva", "eva@example.com");
    }

    private void insertData(SQLiteDatabase db, String name, String email) {
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_2, name);
        contentValues.put(COL_3, email);
        db.insert(TABLE_NAME, null, contentValues);
    }

    public Cursor getAllData() {
        SQLiteDatabase db = this.getWritableDatabase();
        return db.rawQuery("SELECT * FROM " + TABLE_NAME, null);
    }
}