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Android Programming MCQs

Which of the following functions will return all available Content Providers?

List<ProviderInfo> returnList = new ArrayList<ProvderInfo>(); for (PackageInfo pack : getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS)) { ProviderInfo[] providers = pack.providers; if (providers != null) { returnList.addAll(Arrays.asList(providers)); } } return returnList;

return getContext().getPackageManager().queryContentProviders("com.google", Process.myUid(), 0);

List<ActivityInfo> returnList = new ArrayList<ActivityInfo>(); for (PackageInfo pack : getPackageManager().getInstalledPackages(PackageManager.GET_RECEIVERS)) { ActivityInfo[] providers = pack.receivers; if (providers != null) { returnList.addAll(Arrays.asList(providers)); } } return returnList;

None of these.

Answer

Correct Answer: List<ProviderInfo> returnList = new ArrayList<ProvderInfo>(); for (PackageInfo pack : getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS)) { ProviderInfo[] providers = pack.providers; if (providers != null) { returnList.addAll(Arrays.asList(providers)); } } return returnList;

Explanation:

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