Android共享首选项值不会保留

Question

我尝试通过Android SharedPreference API在我的应用中保存用户菜单选项。尽管成功地提交了一个＆＃39; 2＆＃39;我的编辑器对象通过 editor.putInt（＆＃34; woodType＆＃34;，woodIntCode）＆amp;发生onStop（）时， editor.commit（），onCreate（）期间settings.getInt（＆＃34; woodType＆＃34;，0）返回的值始终为0.

为什么首选项文件没有为woodType返回值2

    @Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    ...
    //Restore preferences
    SharedPreferences settings = getPreferences(0); //MODE_PRIVATE = 0
    prefWoodColor = settings.getInt("woodType", 0);    //default color is 0 (dark wood) if no saved pref
}

//When app is stopped, update settings prefs so they persist into next launch
@Override
protected void onStop(){
    super.onStop();
    int woodKey = getGLSurfaceView().mRenderer.getWoodColor();

    // We need an Editor object to make preference changes.
    // All objects are from android.context.Context
    SharedPreferences settings = getPreferences(0);
    SharedPreferences.Editor editor = settings.edit();
    editor.putInt("woodType", woodKey);

    // Commit the edits!
    editor.commit();
}