How do you setLayoutParams for an ImageView

Question

I want to set the LayoutParams for an ImageView but cant seem to find out the proper way to do it   I can only find documentation in the API for the various ViewGroups  but not an ImageView  Yet the ImageView seems to have this functionality   This code doesn t work     myImageView setLayoutParams new ImageView LayoutParams 30 30      How do I do it

User · Answer

You need to set the LayoutParams of the ViewGroup the ImageView is sitting in. For example if your ImageView is inside a LinearLayout, then you create a

LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(30, 30);
yourImageView.setLayoutParams(layoutParams);

This is because it's the parent of the View that needs to know what size to allocate to the View.

User · Answer

If you re changing the layout of an existing ImageView  you should be able to simply get the current LayoutParams  change the width height  and set it back   android view ViewGroup LayoutParams layoutParams   myImageView getLayoutParams    layoutParams width   30  layoutParams height   30  myImageView setLayoutParams layoutParams     I don t know if that s your goal  but if it is  this is probably the easiest solution

User · Answer

An ImageView gets setLayoutParams from View which uses ViewGroup LayoutParams   If you use that  it will crash in most cases so you should use getLayoutParams   which is in View class   This will inherit the parent View of the ImageView and will work always   You can confirm this here  ImageView extends view  Assuming you have an ImageView defined as  image view  and the width height int defined as  thumb size   The best way to do this   ViewGroup LayoutParams iv params b   image view getLayoutParams    iv params b height   thumb size  iv params b width   thumb size  image view setLayoutParams iv params b

User · Answer

Old thread but I had the same problem now  If anyone encounters this he ll probably find this answer   LinearLayout LayoutParams layoutParams   new LinearLayout LayoutParams 30  30   yourImageView setLayoutParams layoutParams     This will work only if you add the ImageView as a subView to a LinearLayout  If you add it to a RelativeLayout you will need to call   RelativeLayout LayoutParams layoutParams   new RelativeLayout LayoutParams 30  30   yourImageView setLayoutParams layoutParams

[android] How do you setLayoutParams() for an ImageView?

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