CollapsingToolbarLayout折叠时未显示工具栏标题

Question

In my MainActivity I have a CollapsingToolbarLayout . By default the toolbar it is expanded. But I want it to be collapsed. So as suggested in a StackOverflow question I used the AppBarLayout class to make it collapsed by default, using this code:

AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.app_bar_layout);
appBarLayout.setExpanded(false);

This works fine, excepting one thing. The toolbar title doesn't show up anymore, not even if I expand and collapse the toolbar manually. If I do not collapse the toolbar by default then the title is showing, but if I change the imageView from the CollapsingToolbarLayout then the title dissapear.

Here is my CollapsingToolbarLayout code:

ViewCompat.setTransitionName(findViewById(R.id.app_bar_layout), EXTRA_IMAGE);
CollapsingToolbarLayout collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
collapsingToolbarLayout.setTitle("Search Activity");
collapsingToolbarLayout.setExpandedTitleColor(getResources().getColor(android.R.color.transparent));
collapsingToolbarLayout.setCollapsedTitleGravity(Gravity.START);

My question is: Am I not setting up the title correctly or am I not collapsing the toolbar in the right way? how can I fix this?

Thank you for your help!

Answer 1

It seems to be a bug of support-v4, appcompat-v7 v24.2.0 as related here .

Probably the next release will fix the issue.

I fixed it by temporally downgrading to v24.1.1 the following libraries in build.gradle :

compile 'com.android.support:cardview-v7:24.1.1'
compile 'com.android.support:recyclerview-v7:24.1.1'
compile 'com.android.support:design:24.1.1'
compile 'com.android.support:appcompat-v7:24.1.1'