java - Change fragment by function -

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i got fragment based activity in android studio

                    somefragment fragment = new somefragment();                     android.support.v4.app.fragmenttransaction fragmenttransaction = getsupportfragmentmanager().begintransaction();                     fragmenttttransaction.replace(r.id.frame,fragment);                     fragmenttttransaction.commit();

i invoke function, that:

        public void gotofragment(string classname) {      ... }

i've tried use class.forname(classname).newinstance() didn't work, android studio shows errors.

thanks in thank in advance

you can this:

    private void showfragment(string fragmentid) {     fragmenttransaction ft = getsupportfragmentmanager().begintransaction();     fragment fragment = getsupportfragmentmanager().findfragmentbytag(fragmentid);     if (fragment == null) {         if (fragmentid.equals("type1") {             fragment = type1fragment.newinstance();         }else if (fragmentid.equals("type2") {             fragment = type2fragment.newinstance();         }         ft.replace(r.id.container, fragment, fragmentid).commit();     } }

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