How to get ImageButton width

Question

How can I get the width of an ImageButton that is set in XML to 0 and has size from the weight?

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginLeft="10dp"
    android:orientation="horizontal">

    <ImageButton
        android:id="@+id/fluido"
        android:layout_width="0dp"
        android:layout_height="70dp"
        android:layout_marginEnd="10dp"
        android:layout_marginRight="10dp"
        android:tint="@color/icon"
        android:layout_weight="0.33"
        app:srcCompat="@drawable/fluido" />

        <......../>

</LinearLayout>

How do I get this value that was automatically set by the weight?

As set in XML as 0, if I do: imageButton.getWidth(); or imageButton.getLayoutParams().width(); both return 0 as in XML.

use `imageButton.getWidth();` but **after** the layout phase - you could use `ViewTreeObserver` for that — pskink, Sep 09 '18 at 06:42
so what is unclear after reading `ViewTreeObserver` official documentation? — pskink, Sep 09 '18 at 06:44
This link will help you https://stackoverflow.com/questions/3591784/views-getwidth-and-getheight-returns-0 — Son Truong, Sep 09 '18 at 06:45

score 1 · Accepted Answer · answered Sep 09 '18 at 06:45

1

It is possible using below snippet:

yourView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() { 

    @Override 
    public void onGlobalLayout() { 
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
            yourView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
        } else {
            yourView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
        } 
        // Correct view dimensions are here:
        int width  = yourView.getMeasuredWidth();
        int height = yourView.getMeasuredHeight(); 
    } 
});

answered Sep 09 '18 at 06:45

aminography

21,986
13
70
74

This still returns 0 – Woton Sampaio Sep 09 '18 at 06:51
I thing setting the android:layout_width="match_parent" instead of 0dp will be helpfull. – aminography Sep 09 '18 at 06:54

score 1 · Answer 2 · answered Sep 09 '18 at 06:53

You should use addOnPreDrawListener

view.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener()
{
    @Override
    public boolean onPreDraw()
    {
        if (view.getViewTreeObserver().isAlive())
            view.getViewTreeObserver().removeOnPreDrawListener(this);

        // put your code here
        return false;
    }
});

Abhishek Singh · Answer 3 · 2018-09-09T06:56:17.617

0

Button button;
button = (Button) findViewById(R.id.button);

int buttonWidth = button.getWidth();

// Showing the Result
Toast.makeText(MainActivity.this, ""+buttonWidth, Toast.LENGTH_SHORT).show();

// Layout Image

// Result

edited Sep 09 '18 at 06:56

answered Sep 09 '18 at 06:46

Abhishek Singh

89
2
9

Abhishek Singh · Answer 4 · 2018-09-09T06:59:39.197

0

It's giving 0 because you have to make sure that the integer in which you store width is not declared as final.

It should be not like this: Click to see Image

edited Sep 09 '18 at 06:59

answered Sep 09 '18 at 06:53

Abhishek Singh

89
2
9

How to get ImageButton width

4 Answers4