Access to object from another activity

In my main Activity I have object with some data in it. I want to delete all this data through PreferenceActivity using method (wipe()) that does this job. How can I do it?

Inside Preferences.java there is a OnPreferenceClickListener which, when activated, expected to use method in 开发者_Go百科object that I need to access.

Thanks in advance.

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Just make this object as static.

Then you can access to this object by class name.

Activity.counters.wipe();

But, keeping data in activities is a bad practice in android development