android - Why ImageView in XML and Java measurement different? -

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i have following xml imageview:

    <imageview         android:id="@+id/iv"         android:layout_width="12dp"         android:layout_height="12dp"         android:src="@drawable/crossy"         android:scaletype="fitxy" />

when run following code:

iv = (imageview) findviewbyid(r.id.iv); log.i("iv wxh", ""+iv.getwidth() + " " + iv.getheight());

logcat shows following:

02-05 23:56:04.116: i/iv wxh(10211): 24 24

how ensure height , width stays same in code in xml?

the dp in xml file indicates measurement unit of "density independent pixels", while value logged java code telling measurement in actual pixels.

px = dp * (dpi / 160)

so in case, have 320 dpi screen, every 1 density independent pixels 2 physical pixels.

if want measurement in physical pixels, replace dp px in xml file. however, realize on device lower dpi, imageview take larger portion of screen.


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