Static Variables : Good or Bad? [duplicate]

Answer 1

You can replace all you static fields with a "Context" object which you can pass around or make a Singleton. It is possible to remove almost all your static fields away. Whether this is a good idea or not is up to you, but I wouldn't assume that it has to be much harder to use instance fields.

BTW: I would suggest

• placing static fields/constant with the class or package which uses them
• treat static arrays as immutable if possible making them final as well.

---

You can use a non-static Context with

public class Context {
    public static final String PREF_UTILITY_FILE_NAME = "PrefUtilityFile";

    public Facebook fb;
    public AsyncFacebookRunner fbAsyncRunner;
    public String[] fbPermissions = {"email", "read_stream", "user_birthday"};
    public SharedPreferences prefs;
    public Editor editor;
    public String access_token;
    public long expires;
}

// pass to constructor as required
class UsesContext {
    final Context context;
    public UsesContext(Context context) {
        this.context = context;
    }

    public void method() {
        // can use context
    }
}

This allows you to create unit tests with multiple Contexts.

The only thing I would leave static are constants.