Android sqlite check if table is empty

i'm working sqlite.i want to check if table is empty.i wrote some code but my code does not working perfect this is a my DatabaseHelper code (function)

public void CheckGenderTableEmpty() {

    String count = "SELECT * FROM Gender";
    Cursor mcursor = db.rawQuery(count, null);
    mcursor.moveToFirst();

    if (mcursor.getCount() != 0) {
        if (!mcursor.isClosed())
            mcursor.close();
        Log.e("is not empty", "is not empty");
    } else {
        if (!mcursor.isClosed())
            mcursor.close();
        Log.e(" empty", "empty");
    }
}

as i said my code does not working perfect.first time my table is empty and i can't show log message about empty and i call my function activity like this..

db_helper=new DatabaseHelper(getApplicationContext());
db_helper.CheckGenderTableEmpty();

how i can check if database is empty in activity?

for example

if(db_helper.CheckGenderTableEmpty() is empty)
        {
         do something
        }

    else
    {

    }

if anyone knows solution please help me