[TextInputLayout] Setting end icon gravity

[davidmak2709]

Is your feature request related to a problem? Please describe.

In a multi line TextInputEditText the end icon is always centered, but in some cases we need it to be set to top or at the bottom of the layout.

After some internet research I didn't find any suitable solution. I tried to explore the implementation class TextInputLayout.java and found out that the end icon is place as a drawable in CheckableImageButton (com.google.android.material.R.id.text_input_end_icon) and the button is place in a FrameLayout.

What I did is finding the button by its ID and then customize the layout params.

// using viewbinding
       private ActivityCommentBinding mBinding;

// change the end icon gravity
       FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) mBinding.commentTextLayout
                .findViewById(com.google.android.material.R.id.text_input_end_icon)
                .getLayoutParams();
        params.gravity = Gravity.TOP;
        mBinding.commentTextLayout
                .findViewById(com.google.android.material.R.id.text_input_end_icon)
                        .setLayoutParams(params);

Result:

Describe the solution you'd like I think it would be useful to have a TextInputLayout XML attribute to set the end icon gravity.

[jsoberg]

An additional concern here comes with having a dynamically sized layout that resizes when the # of lines of text entered changes. Using TOP or BOTTOM gravity as @davidmak2709 did above works, but the icon will be off-centered when the TextInputLayout is only one line high at the time.