启动片段时如何隐藏MainActivity布局？

Question

I have a Main activity and I am launching a fragment from it. However when fragment is launched it also shows the layout of the main activity.

what is the best way to stop it? I don't need to save its state it can be relaunched once fragment is closed.

This is how am launching it

FragmentManager fragmentManager = getSupportFragmentManager();
            android.support.v4.app.FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.container, fragment);
            fragmentTransaction.addToBackStack("");
            fragmentTransaction.commit();

Answer 1

The best way to handle this kind of situation is to use two fragments ( FirstFragment will contain the Ui of ParentActivity ) and let the ParentAcivity contain just the FrameLayout as container. And then you can keep replacing fragments in that container without any problem.

Answer 2

1.put

findViewById(R.id.xxx).setVisibility(View.GONE); 

before getSupportFragmentManager... to hide the view on activity that you want to hide

2.override onBackPressed() to come back from fragment to activity

@override
public void onBackPressed() {
if (getSupportFragmentManager().getBackStackEntryCount() > 0 ) {
        findViewById(R.id.xxx).setVisibility(View.VISIBLE);
        getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }
    else {
        super.onBackPressed();
    }

}