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Posted by Christopher Katsaros, Developer Marketing, Android






LinkedIn is the worlds largest social network
for professionals. LinkedIn has 10
apps on Google Play, including the flagship LinkedIn
app, which provides all of the same features users find on the web, so users
can do things like browse and send messages to their professional network with
an improved user experience.




For LinkedIn, and other teams with a large number of developers adding code to a
project, making sure that everyone pays attention to areas that affect
performance is vital for the quality of their app. Thats why the the LinkedIn
mobile team uses Android Studio to
build high quality Android apps.




Watch Pradeepta Dash, Engineering Manager for Infrastructure at LinkedIn, as
well as Drew Hannay, Tech Lead for the Android Infrastructure team, talk about
how Android Studio helps everyone on their team stay focused on these topics
while getting new engineers quickly up and running:







The top Android developers use Android Studio to build powerful, successful apps
for Google Play; you can learn more about the official IDE for Android app
development, and get
started for yourself.




Get more tips and watch more success stories in the Playbook for
Developers app.

You would need to define multiple DP-bucket layouts (such as layout-600dp,
layout-720dp, layout-1020dp) to handle various screen sizes with traditional
layouts such as LinearLayout or RelativeLayout. But
the dialog above is built with a single FlexboxLayout.




The technique used in the example is setting the flexWrap="wrap" as
explained above,

<com .google.android.flexbox.flexboxlayout 
 android_layout_width="match_parent" 
 android_layout_height="wrap_content" 
 app_flexwrap="wrap">

then you can get the following layout where child views are aligned to a new
line instead of overflowing its parent.

Another technique Id like to highlight is setting the
layout_flexGrow attribute to an individual child. This helps
improve the look of the final layout when free space is left over. The
layout_flexGrow attribute works similar to the
layout_weight attribute in LinearLayout. That means
FlexboxLayout will distribute the remaining space according to the
layout_flexGrow value set to each child in the same line.




In the example below, it assumes each child has the layout_flexGrow
attribute set to 1, so free space will be evenly distributed to
each of them.

 <android .support.design.widget.TextInputLayout
 android_layout_width="100dp"
 android_layout_height="wrap_content" 
 app_layout_flexgrow="1">

You can check out the complete layout
xml file in the GitHub repository.

RecyclerView integration 

Another advantage of FlexboxLayout is that it can be integrated
with RecyclerView.
With the latest release of the alpha
version the new FlexboxLayoutManager extends
RecyclerView.LayoutManager, now you can make use of the Flexbox
functionalities in a scrollable container in much more memory-efficient way.




Note that you can still achieve a scrollable Flexbox container with
FlexboxLayout wrapped with ScrollView. But, you will
be likely to experience jankiness or even an OutOfMemoryError if the number of
items contained in the layout is large, as FlexboxLayout doesnt
take view recycling into account for the views that go off the screen as the
user scrolls.




(If you would like to learn more about the RecyclerView in details, you can
check out the videos from the Android UI toolkit team such as 1, 2)




A real world example where the RecyclerView integration is useful
is for apps like the Google Photos app or News apps, both expect large number of
items while needing to handle various width of items.




One example is found in the demo
application in the FlexboxLayout repository. As you can see in
the repository, each image shown in RecyclerView has a different
width. But by setting the flexWrap setting to wrap,

FlexboxLayoutManager layoutManager = new FlexboxLayoutManager();
layoutManager.setFlexWrap(FlexWrap.WRAP);

and setting the flexGrow (as you can see, you can configure the
attributes through FlexboxLayoutManager and
FlexboxLayoutManager.LayoutParams for child attributes instead of
configuring it from xml) attribute to a positive value for each child,

void bindTo(Drawable drawable) {
 mImageView.setImageDrawable(drawable);
 ViewGroup.LayoutParams lp = mImageView.getLayoutParams();
 if (lp instanceof FlexboxLayoutManager.LayoutParams) {
 FlexboxLayoutManager.LayoutParams flexboxLp = 
 (FlexboxLayoutManager.LayoutParams) mImageView.getLayoutParams();
 flexboxLp.setFlexGrow(1.0f);
 }
}

you can see every image fits within the layout nicely regardless of the screen
orientation.







If you would like to see complete FlexboxLayout example, you can check:

• Playground
  demo app - using FlexboxLayout and
  FlexboxLayoutManager.
  


• Cat
  gallery demo app - using FlexboxLayoutManager

Whats next?

Check out the full documentation for other
attributes to build flexible layouts tailored for your needs. Were very open to
hear your feedback, if you find any issues or feature requests, please file an
issue on the GitHub
repository.

We maintain a current release record and change-log on our website: http://www.teamoctos.com

We have Gapps here.

http://opengapps.org
***USE Gapps of your choosing, we prefer Open Gapps***


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