Значок переключателя курсора навигации не отображается

Question

Im, используя следующий код для настройки навигационного ящика, но значок ящика навигации не отображается.

public class NavigationDrawer extends ActionBarActivity { 
private int mPosition = -1; 
private String mTitle = ""; 
private String[] mDashBoardList; 

private int[] mIcons = new int[]{R.drawable.dashboard, 
     R.drawable.my_orders, R.drawable.testimonials, 
     R.drawable.notifications, R.drawable.contact_us, R.drawable.sync, 
     R.drawable.logout}; 

private String[] mCount = new String[]{"", "", "", "", "", "", "",}; 

private DrawerLayout mDrawerLayout; 
private ListView mDrawerList; 
@SuppressWarnings("deprecation") 
private ActionBarDrawerToggle mDrawerToggle; 
private LinearLayout mDrawer; 
private List<HashMap<String, String>> mList; 
private SimpleAdapter mAdapter; 
final private String DRAWER_CONTENT = "vaighai"; 
final private String FLAG = "flag"; 
final private String COUNT = "count"; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    requestWindowFeature(Window.FEATURE_ACTION_BAR); 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.navigation_drawer_main); 

    mDashBoardList = getResources().getStringArray(R.array.drawerContents); 

    mTitle = (String) getTitle(); 

    mDrawerList = (ListView) findViewById(R.id.drawer_lists); 

    mDrawer = (LinearLayout) findViewById(R.id.drawer); 

    mList = new ArrayList<HashMap<String, String>>(); 

    for (int i = 0; i < 7; i++) { 
     HashMap<String, String> hm = new HashMap<String, String>(); 
     hm.put(DRAWER_CONTENT, mDashBoardList[i]); 
     hm.put(COUNT, mCount[i]); 
     hm.put(FLAG, Integer.toString(mIcons[i])); 
     mList.add(hm); 
    } 

    String[] from = {FLAG, DRAWER_CONTENT, COUNT}; 

    int[] to = {R.id.flag, R.id.country, R.id.count}; 

    mAdapter = new SimpleAdapter(this, mList, R.layout.drawer_layout, from, 
      to); 

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 

    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, 
      R.drawable.ic_drawer, R.string.drawer_open, 
      R.string.drawer_close) { 

     public void onDrawerClosed(View view) { 
      highlightSelectedItem(); 
      supportInvalidateOptionsMenu(); 
     } 

     public void onDrawerOpened(View drawerView) { 
      getSupportActionBar().setTitle(""); 
      supportInvalidateOptionsMenu(); 
     } 
    }; 


    if (mDrawer != null) 
     mDrawerLayout.setDrawerListener(mDrawerToggle); 

    mDrawerList.setOnItemClickListener(new OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> arg0, View arg1, 
           int position, long arg3) { 

      // incrementHitCount(position); 

      if (position < 5) { 
       showFragment(position); 
      } else { 
       Toast.makeText(getApplicationContext(), 
         mDashBoardList[position], Toast.LENGTH_LONG).show(); 
      } 

      mDrawerLayout.closeDrawer(mDrawer); 
     } 
    }); 

    getSupportActionBar().setDisplayHomeAsUpEnabled(true); 

    getSupportActionBar().setDisplayShowHomeEnabled(true); 

    ColorDrawable colorDrawable = new ColorDrawable(Color.parseColor("#2cc3b7")); 
    getSupportActionBar().setBackgroundDrawable(colorDrawable); 

    mDrawerList.setAdapter(mAdapter); 

} 

@Override 
protected void onPostCreate(Bundle savedInstanceState) { 
    super.onPostCreate(savedInstanceState); 
    mDrawerToggle.syncState(); 

} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    if (mDrawerToggle.onOptionsItemSelected(item)) { 
     return true; 
    } 
    return super.onOptionsItemSelected(item); 
} 

public void incrementHitCount(int position) { 
    HashMap<String, String> item = mList.get(position); 
    String count = item.get(COUNT); 
    item.remove(COUNT); 
    if (count.equals("")) { 
     count = " 1 "; 
    } else { 
     int cnt = Integer.parseInt(count.trim()); 
     cnt++; 
     count = " " + cnt + " "; 
    } 
    item.put(COUNT, count); 
    mAdapter.notifyDataSetChanged(); 
} 

public void showFragment(int position) { 

    mTitle = mDashBoardList[position]; 

    DrawerFragment cFragment = new DrawerFragment(); 

    Bundle data = new Bundle(); 

    data.putInt("position", position); 

    cFragment.setArguments(data); 

    FragmentManager fragmentManager = getFragmentManager(); 

    FragmentTransaction ft = fragmentManager.beginTransaction(); 

    ft.replace(R.id.content_frame, cFragment); 

    ft.commit(); 

} 

public void highlightSelectedItem() { 
    int selectedItem = mDrawerList.getCheckedItemPosition(); 

    if (selectedItem > 4) 
     mDrawerList.setItemChecked(mPosition, true); 
    else 
     mPosition = selectedItem; 

    if (mPosition != -1) 
     getSupportActionBar().setTitle(mDashBoardList[mPosition]); 
} 

@Override 
public void onPostCreate(Bundle savedInstanceState, PersistableBundle persistentState) { 
    super.onPostCreate(savedInstanceState, persistentState); 
    mDrawerToggle.syncState(); 
} 

@Override 
public void onConfigurationChanged(Configuration newConfig) { 
    super.onConfigurationChanged(newConfig); 
    mDrawerToggle.onConfigurationChanged(newConfig); 
} 


} 

Я использовал mDrawerToggle.syncState(), но проблема все еще сохраняется. Я также попытался установить getSupportActionBar().setDisplayShowHomeEnabled(true); на getSupportActionBar().setDisplayShowHomeEnabled(false); Но не работает.

Answer 1

Добавьте эту строку:

 Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

Конечно, проверьте файл XML на ид в панели инструментов по умолчанию должна быть панель Тхо.

Answer 2

записи mDrawerToggle.syncState(); после инициализации mDrawerToggle Somthing как этот

mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, 
     R.drawable.ic_drawer, R.string.drawer_open, 
     R.string.drawer_close) { 

    public void onDrawerClosed(View view) { 
     highlightSelectedItem(); 
     supportInvalidateOptionsMenu(); 
    } 

    public void onDrawerOpened(View drawerView) { 
     getSupportActionBar().setTitle(""); 
     supportInvalidateOptionsMenu(); 
    } 
}; 

mDrawerToggle.syncState(); 

обычно все используют панель инструментов, но, как вы не с ActionBarActivity. Я хотел бы упомянуть, что ActionBar устарел.

вы можете попробовать использовать по умолчанию NavigationActivity предоставленного Android студия