How to find high resoultion icon using PacakageManager

Question

I'm doing an app that need the higher resolution icons of each app.

I have done some research since this morning but none of the answers I found work.

Here are two of them and what is wrong for me.

FYI, I have retrieved all the "packageinfo" from the packagemanager, I'm finding everything I need but the high resolution icon...

1. using getDrawableForDensity:

ActivityInfo info = packageManager.getActivityInfo(componentName,     PackageManager.GET_META_DATA);

Resources resources;
try {
    resources = mPackageManager.getResourcesForApplication(
        info.applicationInfo);
} catch (PackageManager.NameNotFoundException e) {
resources = null;
}

if (resources != null) {
int iconId = info.getIconResource();
if (iconId != 0) {
    Drawable d;
    try {
        d = resources.getDrawableForDensity(iconId, DisplayMetrics.DENSITY_XHIGH);
    } catch (Resources.NotFoundException e) {
        d = null;
    }
    return d;
}
}

My problem for this one is that I don't understand what to put for componentName. How can I "construct" it with the information I got from packagemanager ?

2.Other solution Retrieving xhdpi app icons from packageManager?

// Get the application's resources
Resources res = mPackageManager.getResourcesForApplication(appInfo);

// Get a copy of the configuration, and set it to the desired resolution
Configuration config = res.getConfiguration();
Configuration originalConfig = new Configuration(config);
config.densityDpi = DisplayMetrics.DENSITY_XHIGH;

// Update the configuration with the desired resolution
DisplayMetrics dm = res.getDisplayMetrics();
res.updateConfiguration(config, dm);

// Grab the app icon
Drawable appIcon = res.getDrawable(appInfo.icon);

// Set our configuration back to what it was
res.updateConfiguration(originalConfig, dm);

for this one I have a problem with this line:

Drawable appIcon = res.getDrawable(appInfo.icon);

Error I get about "icon":

icon cannot be resolved or is not a field

Answer 1

Try this, it is similar to the code that you have but it seems to work for me :

//Get HiRes Icon

             Drawable appIcon;
List<Application> applications = new ArrayList<Application>();
         for (ApplicationInfo item : getInstalledApplications(packageManager)) {

             try {
               Resources resourcesForApplication = packageManager.getResourcesForApplication(item);
               Configuration config = resourcesForApplication.getConfiguration();
               Configuration originalConfig = new Configuration(config);

               DisplayMetrics displayMetrics = resourcesForApplication.getDisplayMetrics();
               DisplayMetrics originalDisplayMetrics =  resourcesForApplication.getDisplayMetrics();
               displayMetrics.densityDpi =  DisplayMetrics.DENSITY_DEFAULT;
               resourcesForApplication.updateConfiguration(config, displayMetrics);

               appIcon = resourcesForApplication.getDrawable(item.icon);
               resourcesForApplication.updateConfiguration(originalConfig, originalDisplayMetrics);
             } catch (PackageManager.NameNotFoundException e) {
               Log.e("check", "error getting Hi Res Icon :", e);
               appIcon = item.loadIcon(packageManager);
             }

             Application app = new Application();
             app.setTitle(item.loadLabel(packageManager).toString());
             app.setPackageName(item.packageName);
             // app.setImage(item.loadIcon(packageManager));
             app.setImage(appIcon);
             applications.add(app);
           }
    }