Question

I have a question that I didn’t find a real consistent answer for.
That is why I am reaching out to you guys.

I’ve been trying to achieve a ‘viewfinder’ effect for my application in the following sense:

I have a huge picture that I want to be able to “fly” over (scroll horizontally & vertically until I reach the boundaries). So far, all the popular answers to this (or similar questions) is to use a schema that resembles something like this:

<ScrollView...>

  <RelativeLayout ...>

    <Imageview ...>
    </Imageview>

  </RelativeLayout>

</ScrollView>

This does not work for me, because it scales down the picture that I’m trying to keep at the original BIG size so that I can let the user navigate over it.

I guess my question boils down to this: how to get the Google Maps scroll feature using Android Views and Layouts if at all possible… If not, do you have a suggestion? Should I head more towards 2D Canvas operations ?

Thank you.

Answer 1

You can specify the scaleType to center for ImageView to not to scale the image.

<ImageView  
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 

    android:scaleType="center"
    android:src="@drawable/myImage" /> 

Also you can use HorizontalScrollView to scroll horizontally.