Android how to resize (scale) an xml vector icon programmatically

问题

This is driving me crazy. I would like to be able to resize an xml vector drawable icon programmatically in order to use it in an ImageView.

This is what I've done so far which is not working

Drawable drawable = ResourcesCompat.getDrawable(getResources(),R.drawable.ic_marker,null);
drawable.setBounds(0,0,512,512);
imageVenue.setImageDrawable(drawable);

The vector icon ic_marker is not resized. It just keeps the hardcoded width and height values every time.

Any ideas?

回答1:

You can change the width and height of your imageview programmatically. Since vector drawables will preserve the original quality of the image, this will make the desired output happen.

ImageView iv = (ImageView) findViewById(R.id.imgview);
int width = 60;
int height = 60;
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width,height);
iv.setLayoutParams(params);

回答2:

I'm currently facing the same problem.

I'm trying something like this, cause ViewParent has actually height set explicitly, so I use match_parent and set margins. It doesn't work all the time though, cause I simply use this view in a viewholder for RecyclerView... Also I've noticed that sometimes I see scaled up version with artifacts, sometimes full size, sometimes there are margins, and bigger margins... But it still might work for you, if you use it in a simpler scenario.

mImageViewFront.setImageDrawable(vectorDrawable);
final int paddingLR = mImageViewFront.getWidth() / 4;
final int paddingTB = mImageViewFront.getHeight() / 4;
LayoutParams params = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
params.setMargins(paddingLR, paddingTB, paddingLR, paddingTB);
mImageViewFront.setLayoutParams(params);

来源：https://stackoverflow.com/questions/38066207/android-how-to-resize-scale-an-xml-vector-icon-programmatically