How do you change the size of an ImageView?

Question

I have setup my ImageView like the following:

    <ImageView android:id="@+id/dl_image"
               android:layout_width="60dp"
               android:background="@drawable/pictureframe"
               android:layout_height="wrap_content"
               android:layout_marginRight="10dp"
               android:layout_alignParentLeft="true"
               android:layout_centerVertical="true"
               android:adjustViewBounds="true"
               android:scaleType="fitCenter"/>

Notice that layout_width is fixed to 60dp. Depending on the content that I acquired online, I want to resize this width to 90dp, or 120dp (while maintaining the aspect ratio of the image).

I tried using setLayoutParams, but passing LayoutParams(120, LayoutParams.WRAP_CONTENT) throws an exception. It doesn't seem to like it.

If possible, I am trying to avoid making another ImageView for larger sizes.

Peter Ajtai · Accepted Answer · 2011-12-10T00:12:14.060

45

If you're working with an existing view it can be a lot of work creating a new set of LayoutParams from scratch. Instead - you can grab the view's existing LayoutParams, edit these, and then apply them to the view to update its LayoutParams using setLayoutParams()

ImageView imageView = findViewById(R.id.dl_image);
LayoutParams params = (LayoutParams) imageView.getLayoutParams();
params.width = 120;
// existing height is ok as is, no need to edit it
imageView.setLayoutParams(params);

Make sure you import the correct type of LayoutParams. For this case, as you commented, you can just use the LayoutParams of a ViewGroup. If you were setting parameters specific to a certain type of view (e.g. alignments in RelativeLayouts) you would have to import the LayoutParams of that type of view.

edited Dec 10 '11 at 00:12

answered Dec 09 '11 at 23:42

Peter Ajtai

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1

It looks like it works this way. I used ViewGroup's LayoutParams. It seems to work just fine. Thanks! :) – atedja Dec 10 '11 at 00:04
2

@alnite - Glad to have helped. Thanks for letting me know about `ViewGroup`, edited the answer to reflect. – Peter Ajtai Dec 10 '11 at 00:15
It seems that you don't even need to re-set the `layoutParams` to the view. It works simply by changing their values. – Juan José Melero Gómez Jun 14 '19 at 11:24

score 8 · Answer 2 · answered Nov 30 '14 at 20:50

8

you can do it all like

ImageView imageView = findViewById(R.id.dl_image);
imageView.getLayoutParams().width = 120;

answered Nov 30 '14 at 20:50

tibbi

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How do you change the size of an ImageView?

2 Answers2