How to use

PreferenceFragment

in

android.preference

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  addPreferencesFromResource(R.xml.settings);
}

@Override
public void onResume() {
  super.onResume();
}

@Override
@CallSuper
public void onPause() {
  lifecycleSubject.onNext(FragmentEvent.PAUSE);
  super.onPause();
}

@Override
public void onDestroy() {
  super.onDestroy();
  mDownloadLocation = null;
}

@Override
public void onDestroy() {
 prefDocTree
  .getSharedPreferences()
  .unregisterOnSharedPreferenceChangeListener(this);
 super.onDestroy();
}

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  addPreferencesFromResource(R.xml.preferences);
 }
}

@Override
public void onResume() {
  super.onResume();
  Preference patternProtection = findPreference(KEY_PATTERN_PROTECTION);
  patternProtection.setSummary(TextUtils.isEmpty(Settings.getSecurity()) ?
      R.string.settings_privacy_pattern_protection_not_set :
      R.string.settings_privacy_pattern_protection_set);
}

@Override
public void onPause() {
  super.onPause();
  getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
}

@Override
@CallSuper
public void onDestroy() {
  lifecycleSubject.onNext(FragmentEvent.DESTROY);
  super.onDestroy();
}

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  addPreferencesFromResource(R.xml.preferences2);
 }
}

@Override
@CallSuper
public void onResume() {
  super.onResume();
  lifecycleSubject.onNext(FragmentEvent.RESUME);
}

@Override
public void onPause() {
  super.onPause();
  getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
}

@Override
public void onDestroy() {
  super.onDestroy();
  checkBoxPreference = null;
}

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  addPreferencesFromResource(R.xml.preferences);
 }
}

@Override
public void onResume() {
  super.onResume();
  getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
}

@Override
public void onPause() {
  getPreferenceManager().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
  super.onPause();
}

  @Override
  public void onDestroy() {
    super.onDestroy();

    intent = null;
  }
}

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  addPreferencesFromResource(R.xml.preferences);
 }
}

@Override
public void onResume() {
  super.onResume();
  getPreferenceManager().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
}

  @Override
  public void onPause() {
    super.onPause();
    getPreferenceManager().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
  }
}