Very strange button movement in LinearLayout

[magx2]

In attached layout I tried to have 3 buttons in one line with the same width. So I used LinearLayout with layout_weight. The problem is when I press one of these buttons all of them moves little down.

Layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="horizontal">

    <info.hoang8f.widget.FButton
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="1"/>

    <info.hoang8f.widget.FButton
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="2"/>

    <info.hoang8f.widget.FButton
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="3"/>

</LinearLayout>

[hoang8f]

hi @magx2 I still don't know the reason of this bug, but if you use android:gravity="center_vertical" the bug is gone. like this:

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_vertical"
        android:orientation="horizontal">

        <info.hoang8f.widget.FButton
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="1"/>

        <info.hoang8f.widget.FButton
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="2"/>

        <info.hoang8f.widget.FButton
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="3"/>

    </LinearLayout>

[baoxituo1]

I have the same problem

[luizfp]

Same problem!