android - How to display an image full size with ImageView?

Question

I have problem when I try to display the image with full size. I tried to display image with wrap_content. But it is smaller real image.

<ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/screen1_logo" />

I go to the properties of this image and see some information: dimentions 211 x 74. Then I try to display image with fixed width and height. I see it's bigger.

<ImageView
        android:layout_width="211px"
        android:layout_height="74px"
        android:src="@drawable/screen1_logo" />

is it right way? do we must to fix size to display image with full size? Please help me to explain and resolve this problem.

Answer 1

add a scaleType to your ImageView

 <ImageView
     android:scaleType="center"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/screen1_logo" />

from the doc android:scaleType="center"

Center the image in the view, but perform no scaling.