How to "replace" fragment not to "add" in goToFragment()

[mr-wolf-gb]

all my fragment superposed in one page when i change
transaction.add(R.id.container, fragment).commit();
to
transaction.replace(R.id.container, fragment).commit();

application crash with error :

No view found for id 0x7f090054 (com.packa...:id/content) for fragment SFrag{48bbddc #8 id=0x7f090054}

help please

[mr-wolf-gb]

done!

[1cornerstone]

Weldone, i also encounter this error( fragment keep changing to the first fragment view when i click on another fragment view). I got it solved , i just want to pull request i saw your solution. Salute