嘗試在我的活動(dòng)中將SearchView小部件添加到ActionBar時(shí)遇到問(wèn)題-調(diào)用getActionView獲取我的SearchView對(duì)象時(shí)，我得到一個(gè)空值。我一直在關(guān)注Android開發(fā)人員指南，還遇到了大量SO問(wèn)題以及Internet上的其他一些鏈接；一切都無(wú)濟(jì)于事。它可能很簡(jiǎn)單，但我無(wú)法弄清楚-在我看來(lái)，我的代碼與google的代碼基本相同（除了更改了一些名稱等），但仍然無(wú)法正常工作。任何幫助，將不勝感激。以下包括代碼的相關(guān)位。如果有任何不清楚的地方，請(qǐng)讓我知道?；顒?dòng)代碼：    private ListView workflowListView;    private DrawerLayout drawerLayout;    private ListView drawerList;    private ActionBarDrawerToggle drawerToggle;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        getWindow().requestFeature(Window.FEATURE_ACTION_BAR);        setContentView(R.layout.activity_workflow_list);        workflowListView = (ListView) findViewById(R.id.workflowListView);        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);        drawerList = (ListView) findViewById(R.id.drawer_list);        drawerToggle = new ActionBarDrawerToggle(             this,                  /* host Activity */             drawerLayout,         /* DrawerLayout object */             R.drawable.ic_launcher,  /* nav drawer icon to replace 'Up' caret */             R.string.app_name,  /* "open drawer" description */             R.string.app_name  /* "close drawer" description */             ) {                /** Called when a drawer has settled in a completely closed state. */                public void onDrawerClosed(View view) {    //                getActionBar().setTitle("Closed drawer");                }                /** Called when a drawer has settled in a completely open state. */                public void onDrawerOpened(View drawerView) {    //                getActionBar().setTitle("Open drawer");                }       };