java-在ActionBar中显示徽标

概述我有一个 *** 作栏,但一直只是在其中显示应用程序的标题或/和当前片段活动的标题.我想在其中显示徽标,并且添加徽标的任何尝试均未成功.下面是代码：publicclassMainActivityextendsActionBarActivity{privateString[]mOptionMenu;privateDrawerLayoutmDrawerLa

我有一个 *** 作栏,但一直只是在其中显示应用程序的标题或/和当前片段活动的标题.我想在其中显示徽标,并且添加徽标的任何尝试均未成功.

下面是代码：

public class MainActivity extends  ActionBaractivity {    private String[] mOptionMenu;    private DrawerLayout mDrawerLayout;    private relativeLayout mDrawerrelativeLayout;    private ListVIEw mDrawerList;    private ActionbarDrawerToggle mDrawerToggle;    private CharSequence mTitleSection;    private CharSequence mTitleApp;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        ImageVIEw button=(ImageVIEw)findVIEwByID(R.ID.logobutton);        mOptionMenu = new String[] { "Opción 1", "Opción 2", "Opción 3" };         mDrawerLayout = (DrawerLayout) findVIEwByID(R.ID.drawer_layout);         mDrawerrelativeLayout = (relativeLayout)         findVIEwByID(R.ID.left_drawer);         mDrawerList = (ListVIEw) findVIEwByID(R.ID.List_vIEw_drawer);         mDrawerList.setAdapter(new ArrayAdapter<String>(this, androID.R.layout.simple_List_item_1,         mOptionMenu));         mDrawerList.setonItemClickListener(new OnItemClickListener() {         @OverrIDe         public voID onItemClick(AdapterVIEw<?> parent, VIEw vIEw,         int position, long ID) {         Fragment fragment = null;         switch (position) {         case 0:         fragment = new FirstFragment();         break;         case 1:         fragment = new SecondFragment();         break;         case 2:         fragment = new ThirdFragment();         break;         }         FragmentManager fragmentManager = getSupportFragmentManager();         fragmentManager.beginTransaction()         .replace(R.ID.content_frame, fragment).commit();         mDrawerList.setItemChecked(position, true);         mTitleSection = mOptionMenu[position];         getSupportActionbar().setTitle(mTitleSection);         mDrawerLayout.closeDrawer(mDrawerrelativeLayout);         }         });         mDrawerList.setItemChecked(0, true);         mTitleSection = getTitle();         mTitleApp = getTitle();         mDrawerToggle = new ActionbarDrawerToggle(this, mDrawerLayout,         R.drawable.ic_drawer, R.string.drawer_open,         R.string.drawer_close) {         public voID onDrawerClosed(VIEw vIEw) {             getSupportActionbar().setTitle(mTitleSection);             getSupportActionbar().setlogo(R.drawable.logo);         ActivityCompat.invalIDateOptionsMenu(MainActivity.this);         }         public voID onDrawerOpened(VIEw drawerVIEw) {             getSupportActionbar().setTitle(mTitleSection);         ActivityCompat.invalIDateOptionsMenu(MainActivity.this);         getSupportActionbar().setlogo(R.drawable.logo);         }         };         mDrawerLayout.setDrawerListener(mDrawerToggle);         getSupportActionbar().setdisplayHomeAsUpEnabled(true);         getSupportActionbar().setHomebuttonEnabled(true);    }    @OverrIDe    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main_activity_actions, menu);        return true;    }    @OverrIDe    public boolean onoptionsItemSelected(MenuItem item) {        if (mDrawerToggle.onoptionsItemSelected(item)) {            return true;        }        switch (item.getItemID()) {        case R.ID.action_settings:            Toast.makeText(this, "Settings", Toast.LENGTH_SHORT).show();            ;            break;        default:            return super.onoptionsItemSelected(item);        }        return true;    }    @OverrIDe    protected voID onPostCreate(Bundle savedInstanceState) {        super.onPostCreate(savedInstanceState);        mDrawerToggle.syncState();    }    @OverrIDe    public voID onConfigurationChanged(Configuration newConfig) {        super.onConfigurationChanged(newConfig);        mDrawerToggle.onConfigurationChanged(newConfig);    }}

我尝试在代码中添加此行,但未显示任何图像：

 getSupportActionbar().setlogo(R.drawable.logo);

我也有类似的担忧,因为我希望徽标是可单击的并将用户定向到MainActivity

解决方法:

您必须通过调用getSupportActionbar().setdisplayUselogoEnabled(true)在Actionbar上启用徽标功能.

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