Android - getSupportFragmentManager, getChildFragmentManager

 

 

It is necessary to seperate the use of 'getSupportFragmentManager()' and 'getChildFragmentManager()'.

 

If you have Activity "A" and Fragment "A-1" in "A", you should use getSupportFragmentManager() when you manage "A-1". getSupportFragmentManager() need activity.

 

But If you have Fragment "B", "C" in "A-1", you shoud use getChildFragmentManager() when you manage "B", "C".

If you work in fragment ", getChildFragmentManager() would not need activity.

 

 

For example,

activity.getSupportFragmentManager().beginTransaction()
                    .replace({container}, {fragment})
                    .commitAllowingStateLoss();

 

getChildFragmentManager().beginTransaction()
			.replace({container}, {fragment})
			.commitAllowingStateLoss();