How to call getResources() from a class which has no context?

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A Context is a handle to the system; it provides services like resolving resources, obtaining access to databases and preferences, and so on. It is an “interface” that allows access to application specific resources and class and information about application environment. Your activities and services also extend Context to they inherit all those methods to access the environment information in which the application is running.

This means you must have to pass context to the specific class if you want to get/modify some specific information about the resources.
You can pass context in the constructor like

public classname(Context context, String s1) 
{
...
}

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