on which view lifecycle event can i check chip.getLayout()?

Question

I have a Chip view.

I want to check if the text is ellipsized and if so - to replace the text with a shorter text (on run time).

I have seen this code to check if the text in the Chip is ellipsized.

Layout l = textview.getLayout();
if (l != null) {
    int lines = l.getLineCount();
    if (lines > 0)
        if (l.getEllipsisCount(lines-1) > 0)
            Log.d(TAG, "Text is ellipsized");
}

But I don't know at what lifecycle event should i call this method, as for this line

Layout l = myAccountView.getLayout();

I get l = null

I have view lifecycle (frame layout that holds my Chip)

I have tried to check on onDraw() and in onLayout()

I have also tried to call from the Dialog that hold the frame

but I know inflation is top to buttom, so it returns l= null on setContentView() as well.

but isn't inflation top to bottom? meaning the children are not ready before the parent? — Elad Benda, Aug 01 '18 at 17:44
Maybe one of the ViewTreeObserver...Listeners will do the job, see for example [this post](https://stackoverflow.com/questions/7733813/how-can-you-tell-when-a-layout-has-been-drawn) — Bö macht Blau, Aug 01 '18 at 18:13

Krishna Sharma · Accepted Answer · 2018-08-01T18:24:55.360

0

Approach 1: Do call myAccountView.onPreDraw(); just before myAccountView.getLayout()

Approach 2 : Using ViewTreeObserver

ViewTreeObserver vtObserver= myAccountView.getViewTreeObserver();
vtObserver.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
       Layout layout = myAccountView.getLayout();  
    }
});

edited Aug 01 '18 at 18:24

answered Aug 01 '18 at 18:18

Krishna Sharma

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You don't need to call, it's get called by the system. I have given example to solve the issue **either** by using [onPreDraw](https://developer.android.com/reference/android/widget/TextView#onPreDraw()) request a new layout before drawing occurs **OR** `ViewTreeObserver`. I meant to just use any not both. Recommended approach is to use `ViewTreeObserver ` – Krishna Sharma Aug 02 '18 at 11:34
thanks, i understand it's one or the other. I'm just curious to understand why `myAccountView.onPreDraw()` is needed to make my layout not null. it worked. just want to understand why is this call explicitly needed. – Elad Benda Aug 05 '18 at 09:51

on which view lifecycle event can i check chip.getLayout()?

1 Answers1