IssueTracker

Android Studio 3.2 Canary 15
Build #AI-181.4668.68.32.4773949, built on May 10, 2018
JRE: 1.8.0_152-release-1136-b03 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0

* Which Developer Preview build are you using? See Settings > About phone > Build number (for example OPP5.170921.005).
PP2.180412.013

    * Is this a regression from O to P?
I don't think it occurred there.

    * What device are you using? (for example, Pixel XL)
Pixel 2

    * What are the steps to reproduce the problem? (Please provide the minimal reproducible test case.)
1. Use this in layout file, view in layout editor, and run the app:

  <TextView
    android:layout_width="250dp" android:layout_height="wrap_content" android:background="#f00" android:breakStrategy="balanced" android:hyphenationFrequency="none"
    android:text="This is an example text" android:textSize="30dp"/>

2. Do the same for Hebrew text, meaning:

  <TextView
    android:layout_width="250dp" android:layout_height="wrap_content" android:background="#f00" android:breakStrategy="balanced" android:hyphenationFrequency="none"
    android:text="זה הוא טקסט לדוגמה" android:textSize="30dp"/>

You can also shorten the width for Hebrew, as the words are shorter than on English.

    * Issue Category e.g. Framework (platform), NDK (platform), Hardware (CPU, GPU, Sensor, Camera), ART (platform), Runtime Permissions etc
Framework

    * What was the expected result?
To see the Hebrew text spread nicely like on English, and to see the nice result on layout editor too.

    * Can you provide the API document where this expected behavior is explained?
Here:
https://youtu.be/x-FcOX6ErdI?t=228

    * What was the actual result?
For both cases, the layout editor shows the text in exact way as without the special attributes "breakStrategy" and "hyphenationFrequency" or with any combination of them.

On the device, it shows fine on English, but not on Hebrew.

Attached screenshots to show what I mean.
Also attached sample project.