Trick about layouts directory

Layouts in different folders in Android App

Key hash for Android-Facebook app

Trick from stackoverflow

The instructions currently in Facebook's Android Tutorial do not work well under Windows. Their example shows how to pipe the keytool output to openssl but if you try this under Windows the output is not valid for some reason.

Start by downloading openssl for Windows from Google.

C:\Users\Me>keytool -exportcert -alias my_key -keystore my.keystore -storepass PASSWORD > mycert.bin

C:\Users\Me>openssl sha1 -binary mycert.bin > sha1.bin

C:\Users\Me>openssl base64 -in sha1.bin -out base64.txt

After running these commands the valid hash is stored in the file base64.txt. Copy and paste this to your app settings on Facebook.

RecyclerView inside LinearLayout with weightSum

If you use following layout (simplified):

then you can face with strange bug:
adapter of the second RecyclerView binds all items at the same time!
It causes unpredictable slowing of UI and frustration of developer.
The only solution is to avoid this layout, for example - use RelativeLayout and set RV's
width programmatically.

Sometimes nothing helps

Final solution for leaking context with InputMethodManager

Pretty annoying, right?
I've tried already solution with transparent DummyActivity but it has some negative effects.
Here is solution provided via leakcanary and code with minor modifications:


and helper class 

And then add line into onCreate method of your application: