I'd like to know if someone can tell me if this is intended behaviour for a
reason, or just a long standing bug thats in 1.6 and above;
In a nutshell; I have a layout which has four ImageButtons and three sets of
four icons located in the drawables folder (1 icon per button per screen size
out of QVGA, HVGA, WVGA). If I programatically try to set the button to set
the ImageButtons image Android will ignore any maximum size I programatically
specify and scale the ImageButton up beyond the size of the icons & the
specified maximum size.
For those who are more comfortable in code; my manifest contains;
<uses-sdk android:minSdkVersion="3"
android:targetSdkVersion="4" />
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>
and I have;
layout/buttonbar.xml
which contains serval instances of;
<ImageButton android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/transparent"
android:scaleType="center"
android:layout_weight="0"/>
I also have;
drawable/ic_button_small.png (a 32x32 icon)
drawable/ic_button_medium.png (a 48x48 icon)
drawable/ic_button_large.png (a 64x64 icon)
The problem is, if I, in onCreate for an activity, on a hdpi WVGA device (e.g.
the Nexus One), do;
final ImageButton button = (ImageButton)
activity.findViewById(R.id.button);
button.setMaxHeight(64);
button.setMaxWidth(64);
button.setImageResource(R.drawable.ic_button_large);
the each button gets scaled up to be 96x96 (and looks very ugly).
If, however, I copy all of the icons into drawable-hdpi, all of the buttons are
correctly sized at 64x64.
To me the icons should not be scaled up for three reasons;
1) The maximum size of the button was specified as 64x64, and so shouldn't be
scaled up to 96x96.
2) The manifest declares anydenisty, and so UI elements shouldn't be scaled by
the OS.
3) The drawable directory does not specify which densities the icons are for,
therefore the OS shouldn't assume they're mdpi icons which need scaling on a
hdpi device.
What do other people think?
Al.
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