How to know if a Fragment is Visible?

Question

I\'m using the support library v4 and my questions are, How to know if a Fragment is Visible? and How can I change the propierties of the Layout inflated in the Fragment? Th

Answer 1

Try this if you have only one Fragment

if (getSupportFragmentManager().getBackStackEntryCount() == 0) {
                    //TODO: Your Code Here
                }

Answer 2

you can try this way:

Fragment currentFragment = getFragmentManager().findFragmentById(R.id.fragment_container);

or

Fragment currentFragment = getSupportFragmentManager().findFragmentById(R.id.fragment_container);

In this if, you check if currentFragment is instance of YourFragment

if (currentFragment instanceof YourFragment) {
     Log.v(TAG, "your Fragment is Visible");
}

Answer 3

ArticleFragment articleFrag = (ArticleFragment)
            getSupportFragmentManager().findFragmentById(R.id.article_fragment);

    if (articleFrag != null && articleFrag.isVisible()) {

        // Call a method in the ArticleFragment to update its content
        articleFrag.updateArticleView(position);
    }

see http://developer.android.com/training/basics/fragments/communicating.html

Answer 4

Both isVisible() and isAdded() return true as soon as the Fragment is created, and not even actually visible. The only solution that actually works is:

if (isAdded() && isVisible() && getUserVisibleHint()) {
    // ... do your thing
}

This does the job. Period.

NOTICE: getUserVisibleHint() is now deprecated. be careful.

Answer 5

You should be able to do the following:

MyFragmentClass test = (MyFragmentClass) getSupportFragmentManager().findFragmentByTag("testID");
if (test != null && test.isVisible()) {
     //DO STUFF
}
else {
    //Whatever
}

Answer 6

You can override setMenuVisibility like this:

@Override
public void setMenuVisibility(final boolean visible) {
   if (visible) {
      //Do your stuff here
   }

   super.setMenuVisibility(visible);
}