當actionbarActivity中的drawarMenu被關閉時，onBackpress不會調用？

Question

我正在開發Shopping應用程序allmost準備好了，在主要活動中擴展ActionBarActivity.on此活動leftDrawermenu，tabhost爲Fragment。當抽屜被打開，然後onBackPress運行和performe exitConfirmDialog但如果抽屜比exitConfirmdialog關閉無法顯示，上背部按片段直接關閉

public class MainActivity extends ActionBarActivity implements 
      OnTabChangeListener,OnTouchListener, OnBackStackChangedListener { 



    /** The Sliding list view. */ 
     private ListView mSlidingListView; 

     /** The Main adapter data. */ 
     private ArrayList<Category> mMainAdapterData; 

     /** The Sliding adapter. */ 
     private SlidingAdapter mSlidingAdapter; 

     /** The catalog xml parser. */ 
     private CatalogXmlParser catalogXmlParser; 

     /** The Drawer toggle. */ 
     private ActionBarDrawerToggle mDrawerToggle; 

     /** The Drawer layout. */ 
     private DrawerLayout mDrawerLayout; 

     /** The Toolbar. */ 
     private Toolbar mToolbar; 

     /** The Ab cart counter. */ 
     public static TextView mAbCartCounter; 

     /** The Ab title. */ 
     private TextView mAbTitle; 

     /** The Ab search. */ 

     /** The Ab checkout. */ 
     private View mAbCheckout; 

     /** The Ab cart image view. */ 
     public static View mAbCartImageView; 

     /** The Ab login cart image view. (added by nayan)*/ 
     //private View mAbLoginImageView; 
     public View mAbLoginImageView; 
     private int ExitFlag=1; 

     /** The Ab clear filter. */ 
     //private View mAbClearFilter; 

     /** The Ab search et. */ 
     private EditText mAbSearchEt; 

     /** The Ab cancel search. */ 
     private View mAbCancelSearch; 

     /** The Search text watcher. */ 
     private SearchTextWatcher mSearchTextWatcher; 

     /** The Ab sent. */ 
     private View mAbSent; 

     private Context mContext; 

     @SuppressWarnings("deprecation") 
     private LocalActivityManager mLocalActivityManager; 

     private Bundle savedInstanceState_; 

     public List<List<Product>> AdapterData; 

     public boolean IsHaveSlider; 

     public TabHost tabHost; 

     private TextView tabtext; 

     private HorizontalScrollView scroll_Focus; 
     public static Set<String> Cart_ProductList = new HashSet<String>(); 
     public boolean first_Time=true; 

     private int tab; 

     private View login_lbl; 

     private RelativeLayout layout_Cart; 

     private Toast toast; 

     private ImageView mAbSearch; 

     private View mAbClearFilter;  

     public String Current_Fragment_flag; 

     public static LinearLayout container; 

     public static EditText sampleImage; 

     private int AnimationState=0; 

     /* 
     * (non-Javadoc) 
     * 
     * @see android.support.v7.app.ActionBarActivity#onCreate(android.os.Bundle) 
     */ 
     @Override 
     protected void onCreate(Bundle savedInstanceState) { 

      this.mContext = getBaseContext(); 

      ThemesManager.setCorrectTheme(this, AppSettings.CURRENT_THEME); 

      super.onCreate(savedInstanceState); 

      savedInstanceState_=savedInstanceState; 
      MainSplashScreen.isfirsttime=false; 

      setContentView(R.layout.activity_main); 

      mSearchTextWatcher = new SearchTextWatcher(); 

      ImageLoaderConfiguration imageLoaderConfiguration = ImageOptionsBuilder 
        .createImageLoaderConfiguration(this); 
      ImageLoader.getInstance().init(imageLoaderConfiguration); 

      catalogXmlParser = CatalogXmlParser.getInstance(); 

      catalogXmlParser.parseData(this); 

      mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
      sampleImage = (EditText) findViewById(R.id.sampleEDT); 
      container = (LinearLayout) findViewById(R.id.main_placeholder); 


      initActionbar(); 

      //ADDED BY NAYAN FOR INVISIBLE LOGIN BUTTON FROM ACTIONBAR IF ALREADY LOGGED 
      mAbLoginImageView = findViewById(R.id.ab_login_card); 
      login_lbl=findViewById(R.id.login_lbl); 
      sampleImage.addTextChangedListener(new TextWatcher() { 

       @Override 
       public void onTextChanged(CharSequence s, int start, int before, int count) { 
        // TODO Auto-generated method stub 
        if(AnimationState==0) 
        { 
         mAbCartCounter.animate().rotationYBy(720).setDuration(2000); 

        } 

        mAbCartCounter.animate().setListener(new AnimatorListener() { 

         @Override 
         public void onAnimationStart(Animator arg0) { 
          // TODO Auto-generated method stub 
          AnimationState=1; 
         } 

         @Override 
         public void onAnimationRepeat(Animator arg0) { 
          // TODO Auto-generated method stub 

         } 

         @Override 
         public void onAnimationEnd(Animator arg0) { 
          // TODO Auto-generated method stub 
          AnimationState=0; 
         } 

         @Override 
         public void onAnimationCancel(Animator arg0) { 
          // TODO Auto-generated method stub 

         } 
        }); 
       } 

       @Override 
       public void beforeTextChanged(CharSequence s, int start, int count, 
         int after) { 
        // TODO Auto-generated method stub 

       } 

       @Override 
       public void afterTextChanged(Editable s) { 
        // TODO Auto-generated method stub 

       } 
      }); 

      boolean isLogges = ApplicationPreference.getLogInStatus(); 
      if (isLogges!=true) 

      { 
       mAbLoginImageView.setVisibility(View.VISIBLE); 
       login_lbl.setVisibility(View.VISIBLE); 
       mAbCartImageView.setVisibility(View.GONE); 
       mAbCartCounter.setVisibility(View.GONE); 

      } 
      else 
      { 
       mAbLoginImageView.setVisibility(View.INVISIBLE); 
       login_lbl.setVisibility(View.INVISIBLE); 

       mAbCartImageView.setVisibility(View.VISIBLE); 
       mAbCartCounter.setVisibility(View.VISIBLE); 
      } 
      //END NAYAN 
      tabhost(); 

      mAbCartImageView.setClickable(true); 


      mAbCartCounter.setClickable(true); 

      layout_Cart=(RelativeLayout)findViewById(R.id.layout_Cart); 
      layout_Cart.setOnClickListener(new OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        // TODO Auto-generated method stub 

        int is_cart_visible=mAbCartImageView.getVisibility(); 
        if(is_cart_visible==0) 
        { 
         // showCartFragment(true, false); 

         /* PopupWindow m_PopUpWindow = new PopupWindow(MainActivity.this); 
          m_PopUpWindow.setContentView(v); 
          m_PopUpWindow.setHeight(50); 
          m_PopUpWindow.setWidth(50); 
          m_PopUpWindow.showAsDropDown(v,300,5);*/ 

        // mAbCartImageView.setClickable(false); 
        // mAbCartCounter.setClickable(false); 
          boolean isLogges = ApplicationPreference.getLogInStatus(); 
          if(isLogges==false) 
          { 
           Toast.makeText(mContext, 
             mContext.getString(R.string.pls_login), 
             Toast.LENGTH_LONG).show(); 
          }else 
          { 
           if(Integer.parseInt(mAbCartCounter.getText().toString())>0) 
           { 
           // mAbCartImageView.setBackgroundColor(Color.GREEN); 
            //mAbCartCounter.setError("Please Wait...."); 
    //        boolean addToBackStack=false; 
    //        boolean clearBackStack=false; 
    //        FragmentDirectOrder FragmentDirectOrder1 = new FragmentDirectOrder("").newInstance(); 
    //        //fragmentLogin.TAG="Login"; 
    //        showScreen(FragmentDirectOrder1, FragmentDirectOrder1.TAG, addToBackStack,clearBackStack); 
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); 
            builder.setMessage("please Wait..."); 
            AlertDialog dialog = builder.show(); 

            // Must call show() prior to fetching text view 
            TextView messageView = (TextView)dialog.findViewById(android.R.id.message); 
            messageView.setGravity(Gravity.CENTER); 

            Intent orderBooking = new Intent(MainActivity.this, OrderBookingScreen.class); 
            orderBooking.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
            orderBooking.putExtra("CALLING", "cart"); 
            startActivity(orderBooking); 
           } 
           else 
           { 
            Toast toast= Toast.makeText(getApplicationContext(),"Please select the product.",Toast.LENGTH_LONG); 
            LinearLayout linearlayout=(LinearLayout)toast.getView(); 
            TextView msgtext=(TextView)linearlayout.getChildAt(0); 
            msgtext.setTextSize(12); 
            toast.setGravity(Gravity.TOP|Gravity.CENTER_HORIZONTAL,70,3); 
           // toast.setMargin(10, 10); 
            toast.show(); 
           } 
            /* for(int i=0;i<tabHost.getTabWidget().getChildCount();i++) 
         {   
          TextView tabtext_2=(TextView) tabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title); 
          tabtext_2.setTextColor(Color.BLACK);    
          tabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.TRANSPARENT); 
          tabHost.clearFocus(); 
         }*/ 
        } 
        }else 
        { 
         Intent login_form = new Intent(MainActivity.this, FragmentLogin.class); 
         startActivity(login_form); 
        } 
       } 
      }); 
     // overridePendingTransition(R.anim.fade_in, R.anim.fade_out); 



     } 

public void onBackPressed() { 
    if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) { 
     mDrawerLayout.closeDrawer(GravityCompat.START); 
     Toast.makeText(this, "DrawerClosed", Toast.LENGTH_LONG).show(); 
    } else if (getSupportFragmentManager().getBackStackEntryCount() > 0) { 
     getSupportFragmentManager().popBackStack(); 
     Toast.makeText(this, "popBackStack", Toast.LENGTH_LONG).show(); 
    } else { 
     Toast.makeText(this, "popBackStack", Toast.LENGTH_LONG).show(); 
     super.onBackPressed(); 
    } 
} 

Answer 1

mParentView.setFocusableInTouchMode(true); 
     mParentView.requestFocus(); 
     mParentView.setOnKeyListener(new View.OnKeyListener() { 
      @Override 
      public boolean onKey(View v, int keyCode, KeyEvent event) { 

       if (keyCode == KeyEvent.KEYCODE_BACK){ 

        if(ExitFlag == 1) 
        { 
         ExitFlag++; 
         getActivity().getSupportFragmentManager().popBackStack(); 
         getActivity().onBackPressed(); 
        } 
        else 
        { 
         ExitFlag = 1; 
        } 
       } 


       return true; 
      } 
     });