Is this the proper/right way of coding?

Question

I have these codes below the Oncreate.

Could someone tell me if this is the right way of coding?

If not the proper way, would you please give me some suggestions?

Thanks alot.

@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    getPreferenceManager().setSharedPreferencesName(main_activity.SHARED_PREFS_NAME);
    addPreferencesFromResource(R.xml.wallpaper_settings);

    getPreferenceManager().getSharedPreferences()
            .registerOnSharedPreferenceChangeListener(this);

Preference button1 = (Preference)findPreference("button1");
button1.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference arg0) { 
                //for login   
                return true;
            }
        });


Preference button2 = (Preference)findPreference("button2");
button2.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference arg0) { 
                //for new password 
                return true;
            }
        });


Preference button3 = (Preference)findPreference("button3");
button3.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference arg0) { 
                //for reset password
                return true;
            }
        });

Edit: fixed errors