[MaterialButton] Long button text gets cut off when using maxlines=2 and ellipsize=end

Description: When using a MaterialButton with fixed width and fixed number of text lines, I tried to find a way to deal with dynamic button text that could be too long for the button size. When the text is too long for the button the words that don’t fit will simply not be displayed by default, thus not indicating that there are words missing. When setting “ellipsize” to “end” the three dots get displayed, but the beginning of the text will be cut off in some situations.

Steps to reproduce: Check out and run this sample project: https://github.com/geworfener/MaterialButtonEllipsizeBug

Alternatively:

1. Create a new Android project with a single activity.
2. Add material lib and set material theme.
3. Use the following activity layout:

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.google.android.material.button.MaterialButton
        android:layout_width="128dp"
        android:layout_height="wrap_content"
        android:maxLines="2"
        android:ellipsize="end"
        android:text="Hello world, this is a long text!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Actual behavior:

The first letter of the second text line gets cut off.

Expected behavior: All words of the text are displayed fully.

Android API version: 28

Material Library version: 1.1.0-beta02, 1.2.0-alpha02

Device: Pixel 3a XL

[C0nstan]

It still occurs in 1.2.0. This is a serios functionality bug, wherefore we cant use the MaterialButton in our project. Is there a time plan when this is getting fixed?

[gabrielemariotti]

It happens also using android:maxLines="1":

    <com.google.android.material.button.MaterialButton
        android:layout_width="128dp"
        android:layout_height="wrap_content"
        android:maxLines="1"
        android:ellipsize="end"
        android:text="Hello world, this is a long text!"
         />

It doesn’t happen with an AppCompatButton: