I'm getting this error:
Unable to start activity ComponentInfo{amsi.dei.estg.ipleiria.pt.ima/amsi.dei.estg.ipleiria.pt.ima.ListaEmpresas}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.database.sqlite.SQLiteDatabase.execSQL(java.lang.String)' on a null object reference" on this line in my DBHelper:
The error is in this line:
database.execSQL(createEmpresasTable);
My DBHelper:
public class ImaBDHelper extends SQLiteOpenHelper {
private static final String DB_NAME = "IMA";
private static final int DB_VERSION = 1;
private static final String EMPRESAS_TABLE_NAME = "empresas";
private static final String NOME_EMPRESA = "nome";
private static final String DESCRICAO_EMPRESA = "descricao";
private static final String LOCALIDADE_EMPRESA = "localidade";
private static final String AREA_EMPRESA = "area";
private final SQLiteDatabase database;
public ImaBDHelper(Context context)
{
super(context, DB_NAME, null, DB_VERSION);
this.database = getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
String createEmpresasTable = "CREATE TABLE " + EMPRESAS_TABLE_NAME +
"(id INTENGER PRIMARY KEY AUTOINCREMENT," +
NOME_EMPRESA + " TEXT NOT NULL," +
DESCRICAO_EMPRESA + " TEXT," +
LOCALIDADE_EMPRESA + " TEXT NOT NULL," +
AREA_EMPRESA + " TEXT NOT NULL," + ")";
database.execSQL(createEmpresasTable);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
String sql = "DROP TABLE IF EXISTS " + EMPRESAS_TABLE_NAME;
database.execSQL(sql);
this.onCreate(database);
}
The rest are just methods to create, read, update and delete.
Sorry if this is a duplicate but I haven't found the answer for this exact problem in my searches. Thank you in advance!