set height of imageview as matchparent programmatically

Question

I need to set the height of an imageview as matchparent programatically.if it is a fixed height i know how to set.

but how can i set it as matchparent?

EDIT:

actually height of the parent layout is dynamic.so i need to make the height of the imageview as the height of parent.

Semibreve

i have tried all the methods mentioned in the answers.but it is not setting the height as match parent :( – Semibreve

You should review your accepted answer – Dellora

Answer 1

initiate LayoutParams .

assign the parent's width and height and pass it to setLayoutParams method of the imageview

Bijouterie

you should never pass the parents actual dimensions. Always use MATCH_PARENT instead of actual values. In general I wouldn't recommend using absolute sizes because it might look completely different on all the screens there are. I'd prefer using weights. – Sculptor

To be honest this should be a comment – Cesta

Answer 2

imageView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

Mutt

The moment i press Alt+Enter in LayoutParams, i see so many classes. Can you please tell me which one to use? – Shotputter

what is the parent view? – Mutt

You should use class of view that You want to set LayoutParams i.e. use LinearLayout.LayoutParams to set prams to Your LL :) – Nefertiti

What if you want the height to be dynamic based on the dimensions of the original image but want the width to be MATCH_PARENT? – Comedown

import android.view.ViewGroup – Rennes

Answer 3

imageView.getLayoutParams().height= ViewGroup.LayoutParams.MATCH_PARENT;

Scathe

If you're setting the params for the first time because you made the imageview programmatically, this will null pointer error (or does with text view) and should everywhere else. – Maggot

Answer 4

For Kotlin Users

val params = mImageView?.layoutParams as FrameLayout.LayoutParams
params.width = FrameLayout.LayoutParams.MATCH_PARENT
params.height = FrameLayout.LayoutParams.MATCH_PARENT
mImageView?.layoutParams = params

Here I used FrameLayout.LayoutParams since my views( ImageView) parent is FrameLayout

Linstock

Answer 5

imageView.setLayoutParams
    (new ViewGroup.MarginLayoutParams
        (width, ViewGroup.LayoutParams.MATCH_PARENT));

The Type of layout params depends on the parent view group. If you put the wrong one it will cause exception.

Insensibility

Answer 6

I had same issue. Resolved by firstly setting :

imageView.setMinHeight(0);
imageView.setMinimumHeight(0);

And then :

imageView.getLayoutParams().height= ViewGroup.LayoutParams.MATCH_PARENT;

setMinHeight is defined by ImageView, while setMinimumHeight is defined by View. According to the docs, the greater of the two values is used, so both must be set.

Gosplan

Answer 7

You can try this incase you would like to match parent. The dimensions arrangement is width and height inorder

web = new WebView(this);
        web.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));

Boots

Answer 8

You can use the MATCH_PARENT constant or its numeric value -1.

Clouet

MATCH_PARENT is not defined in the context. You must say 'LayoutParams.MATCH_PARENT' – Aquitaine