CODEWITHSUNDEEP
androidandroid-actionbarandroid-support-library
arenaq
arenaq

Reputation: 2380

What does ActionBar#setDefaultDisplayHomeAsUpEnabled in Android Support library?

I know what setDisplayHomeAsUpEnabled does, but what is setDefaultDisplayHomeAsUpEnabled for I can only wonder. No documentation found, cannot find anything except it is being used.

Upvotes: 5

Views: 3568

Answers (1)

Phocacius
Phocacius

Reputation: 1148

This method is only available in the Support Action Bar, not in the "native" ActionBar class available since Android 3. More importantly, it is annotated with @hide in the source, meaning it is not part of the official API for third-party developers. That is why it is nowhere documented by Google. You should just not use it.

Having a deeper look into the sources, I found the method implemented in WindowDecorActionBar:

public void setDefaultDisplayHomeAsUpEnabled(boolean enable) {
    if (!mDisplayHomeAsUpSet) {
        setDisplayHomeAsUpEnabled(enable);
    }
}

So basically it does exactly the same as using setDisplayHomeAsUpEnabled, but only if the value has not yet been set manually using the said function.

tldr: you should always use setDisplayHomeAsUpEnabled and ignore the default method.

Upvotes: 5

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