android 10" xhdpi tablet launcher icon size

Question

i have an app that creates shortcuts. it generates the shortcut icon dynamically, so i need to know the correct launcher icon size.

to handle this, i created dimens.xml in values-ldpi/mdpi/hdpi/xhdpi/xxhdpi and defined my icon size to be 36/48/72/96/144px respectively.

this scheme works, except on 10", xhdpi tablets (like the nexus 10). it appears these tablets use a launcher icon size of 144px (xxhdpi) despite have an xhdpi screen.

is there a way to correctly detect the launcher icon size that takes into account 10" xhdpi tablets? or is there a better scheme for getting my icons sized correctly? or perhaps is there a way to differentiate this case from the simple xhdpi case?

thanks.

"it appears these tablets use a launcher icon size of 144px (xxhdpi) despite have an xhdpi screen" -- yes, Google mentioned this, albeit through non-official channels: https://plus.google.com/118292708268361843293/posts/ePQya3KsTjW Perhaps `getLauncherLargeIconDensity()` on `ActivityManager` will help you, as Nick mentioned in his G+ post. — CommonsWare, Jan 25 '13 at 00:02
If you're interested, have a look at http://stackoverflow.com/questions/13215587/android-xxhdpi-resources for a run-down of why the Nexus 10 uses XXHDPI resources. — Eric, Jan 25 '13 at 00:06
@CommonsWare please post this as an answer (getLauncherLargeIconDensity()), that worked. — Jeffrey Blattman, Jan 25 '13 at 00:30
Actually, since I didn't fully understand your problem, let alone precisely if and how `getLauncherLargeIconDensity()` would help, I'd recommend that you answer your own question in this case. It'll be more useful to others who run across this question. — CommonsWare, Jan 25 '13 at 00:35

Jeffrey Blattman · Accepted Answer · 2015-08-06T22:16:53.763

Answering my own questions.

To get the launcher icon size, simply call ActivityManager.getLauncherLargeIconSize() as suggested by CommonsWare above. One slight hiccup is that this is only available on API 11+. In that case, fall back to using DisplayMetrics. This will of course fail if there was a 10" XHDPI device that ran android 2, which is extremely unlikely (since X*HDPI didn't exist at the time of Android 2). Here's the utility method i wrote,

@SuppressLint("NewApi")
private int getLauncherIconSize() {
    int size = 48;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        ActivityManager mgr = (ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE);
        size = mgr.getLauncherLargeIconSize();
    } else {
        DisplayMetrics metrics = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
        switch (metrics.densityDpi) {
        case DisplayMetrics.DENSITY_LOW:
            size = 36;
            break;
        case DisplayMetrics.DENSITY_MEDIUM:
            size = 48;
            break;
        case DisplayMetrics.DENSITY_HIGH:
            size = 72;
            break;
        case DisplayMetrics.DENSITY_XHIGH:
            size = 96;
            break;
        case DisplayMetrics.DENSITY_XXHIGH:
            size = 144;
            break;
        }
    }

    return size;
}

android 10" xhdpi tablet launcher icon size

1 Answers1