Question

android the image looks too small on screen, how to scale it to fit the screen? wrap_content does not seem to work

<RelativeLayout
    android:id="@+id/layout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
<ImageView
    android:layout_alignParentTop="true"
    android:layout_marginTop="100dip"
    android:id="@+id/imageview"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:src="@drawable/splash_screen"/>
<ProgressBar
    android:layout_alignParentBottom="true"
    android:layout_marginBottom="20dip"
    android:id="@+id/progressbar"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
</RelativeLayout>

Answer 1

Add the following attribute to your ImageView to get it to scale as you like (will fill the size of your ImageView):

android:scaleType="fitXY"

I would actually change your width attribute as well. Your final XML could look like this:

<ImageView
    android:layout_alignParentTop="true"
    android:layout_marginTop="100dip"
    android:id="@+id/imageview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:scaleType="fitXY"
    android:src="@drawable/splash_screen"/>