Android – Set negative margin on ImageView shifts ImageView but not Image

androidimageviewlayout

I Need to shift an ImageView, which is a direct child of a LinearLayout, a bit to the left.

What happens: The View is shifted (can see the "bounding box" is shifted, with android layout manager) but the drawable keeps in the same place.

Also the drawable is cut on the right side, if I set margin low enough.

enter image description here

Why is this? Any advice?

Clarification: I have to shift the Image to the left. That means a bit ouside of the bounds of the containing layout.

Best Answer

It seems elements are always clipped when they get outside of parent's bounds (also with clipChildren=false).

A solution is to create an additional container-layout for everything besides of the item to be shifted. And then shift the container-layout in the opposite direction.

For example, to shift -10dip:

<Original container ...>
    <Item to be shifted/>
    <New container with margin 10dip>
         <Previous content of Original container ... />
    </New container with margin 10dip>
</Original container>

Related Solutions

Android – How to scale an Image in ImageView to keep the aspect ratio

Yes, by default Android will scale your image down to fit the ImageView, maintaining the aspect ratio. However, make sure you're setting the image to the ImageView using android:src="..." rather than android:background="...". src= makes it scale the image maintaining aspect ratio, but background= makes it scale and distort the image to make it fit exactly to the size of the ImageView. (You can use a background and a source at the same time though, which can be useful for things like displaying a frame around the main image, using just one ImageView.)
You should also see android:adjustViewBounds to make the ImageView resize itself to fit the rescaled image. For example, if you have a rectangular image in what would normally be a square ImageView, adjustViewBounds=true will make it resize the ImageView to be rectangular as well. This then affects how other Views are laid out around the ImageView.

Then as Samuh wrote, you can change the way it default scales images using the android:scaleType parameter. By the way, the easiest way to discover how this works would simply have been to experiment a bit yourself! Just remember to look at the layouts in the emulator itself (or an actual phone) as the preview in Eclipse is usually wrong.

Java – Set ImageView width and height programmatically

It may be too late but for the sake of others who have the same problem, to set the height of the ImageView:

imageView.getLayoutParams().height = 20;

Important. If you're setting the height after the layout has already been 'laid out', make sure you also call:

imageView.requestLayout();

Best Answer

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Android – How to scale an Image in ImageView to keep the aspect ratio

Java – Set ImageView width and height programmatically

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