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//**********Conexion********************
AdminSqLiteOpenHelper admin= new AdminSqLiteOpenHelper(this, "administracion", null,1);
SQLiteDatabase db=admin.getWritableDatabase();

//**********Rescatar variables de textbox*****************
String codigo=mainTxtCodigo.getText().toString();
String descripcion=mainTxtDescripcion.getText().toString();
String precio=mainTxtPrecio.getText().toString();

//*****************Contenedore de valore*************
ContentValues registro= new ContentValues();
registro.put("dbCodigo",codigo);
registro.put("dbDescripcion",descripcion);
registro.put("dbPrecio",precio);

//****************Insertar valores******************
db.insert("articulos", null, registro);
db.close();

//**************Notificacion************************
Toast.makeText(MainActivity.this, "Agregado a bbdd", Toast.LENGTH_SHORT).show();