Example usage for android.app FragmentManager getBackStackEntryCount

Introduction

In this page you can find the example usage for android.app FragmentManager getBackStackEntryCount.

Prototype

public abstract int getBackStackEntryCount();

Source Link

Document

Return the number of entries currently in the back stack.

Usage

From source file:org.path.episample.android.activities.MainMenuActivity.java

public void swapToFragmentView(ScreenList newFragment) {
    WebLogger.getLogger(getAppName()).i(t, "swapToFragmentView: " + newFragment.toString());

    String get = PropertiesSingleton.getProperty("survey",
            AdminPreferencesActivity.KEY_TURN_ON_OFF_WIFI_AUTOMATICALLY);
    if (!(get != null && get.equalsIgnoreCase("false"))) {
        if (mWifiManager.isWifiEnabled() && mWifiManager.getWifiState() != WifiManager.WIFI_STATE_DISABLED) {
            mWifiManager.setWifiEnabled(false);
        }//from w w w.  ja v a  2  s.co  m
    }

    FragmentManager mgr = getFragmentManager();
    Fragment f;
    if (newFragment == ScreenList.MAIN_SCREEN) {
        throw new IllegalStateException("unexpected reference to generic main screen");
    } else if (newFragment == ScreenList.CUSTOM_VIEW) {
        WebLogger.getLogger(getAppName()).w(t,
                "swapToFragmentView: changing navigation to move to WebKit (was custom view)");
        f = mgr.findFragmentById(WebViewFragment.ID);
        if (f == null) {
            f = new WebViewFragment();
        }
        newFragment = ScreenList.WEBKIT;
    } else if (newFragment == ScreenList.MAIN_MENU) {
        f = mgr.findFragmentById(MainMenuFragment.ID);
        if (f == null) {
            f = new MainMenuFragment();
        }
    } else if (newFragment == ScreenList.COLLECT_MODULE) {
        f = mgr.findFragmentById(CollectFragment.ID);
        if (f == null) {
            f = new CollectFragment();
        }
    } else if (newFragment == ScreenList.SEND_RECEIVE_WIFI_DIRECT_MODULE) {
        f = mgr.findFragmentById(SendReceiveFragment.ID);
        if (f == null) {
            f = new SendReceiveFragment();
        }
    } /*else if (newFragment == ScreenList.SEND_RECEIVE_BLUETOOTH_MODULE) {
       f = mgr.findFragmentById(SendReceiveFragmentBT.ID);
       if (f == null) {
          f = new SendReceiveFragmentBT();
       }
      }*/ else if (newFragment == ScreenList.SELECT_MODULE) {
        f = mgr.findFragmentById(SelectFragment.ID);
        if (f == null) {
            f = new SelectFragment();
        }
    } else if (newFragment == ScreenList.NAVIGATE_MODULE) {
        f = mgr.findFragmentById(NavigateFragment.ID);
        if (f == null) {
            f = new NavigateFragment();
        }
    } else if (newFragment == ScreenList.RESTORE_MODULE) {
        f = mgr.findFragmentById(RestoreFragment.ID);
        if (f == null) {
            f = new RestoreFragment();
        }
    } else if (newFragment == ScreenList.EDIT_CENSUS_MODULE) {
        f = mgr.findFragmentById(EditCensusFragment.ID);
        if (f == null) {
            f = new EditCensusFragment();
        }
    } else if (newFragment == ScreenList.REMOVE_CENSUS_MODULE) {
        f = mgr.findFragmentById(RemoveCensusFragment.ID);
        if (f == null) {
            f = new RemoveCensusFragment();
        }
    } else if (newFragment == ScreenList.INVALIDATE_CENSUS_MODULE) {
        f = mgr.findFragmentById(InvalidateCensusFragment.ID);
        if (f == null) {
            f = new InvalidateCensusFragment();
        }
    } else if (newFragment == ScreenList.FORM_CHOOSER) {
        f = mgr.findFragmentById(FormChooserListFragment.ID);
        if (f == null) {
            f = new FormChooserListFragment();
        }
    } else if (newFragment == ScreenList.INITIALIZATION_DIALOG) {
        if (currentFragment == ScreenList.INITIALIZATION_DIALOG) {
            WebLogger.getLogger(getAppName()).e(t, "Unexpected: currentFragment == INITIALIZATION_DIALOG");
            return;
        } else {
            f = mgr.findFragmentById(InitializationFragment.ID);
            if (f == null) {
                f = new InitializationFragment();
            }
            ((InitializationFragment) f).setFragmentToShowNext(
                    (currentFragment == null) ? ScreenList.FORM_CHOOSER.name() : currentFragment.name());
        }
    } else if (newFragment == ScreenList.FORM_DELETER) {
        f = mgr.findFragmentById(FormDeleteListFragment.ID);
        if (f == null) {
            f = new FormDeleteListFragment();
        }
    } else if (newFragment == ScreenList.FORM_DOWNLOADER) {
        f = mgr.findFragmentById(FormDownloadListFragment.ID);
        if (f == null) {
            f = new FormDownloadListFragment();
        }
    } else if (newFragment == ScreenList.INSTANCE_UPLOADER_TABLE_CHOOSER) {
        f = mgr.findFragmentById(InstanceUploaderTableChooserListFragment.ID);
        if (f == null) {
            f = new InstanceUploaderTableChooserListFragment();
        }
    } else if (newFragment == ScreenList.INSTANCE_UPLOADER) {
        f = mgr.findFragmentById(InstanceUploaderListFragment.ID);
        if (f == null) {
            f = new InstanceUploaderListFragment();
        }
        ((InstanceUploaderListFragment) f).changeUploadTableId();
    } else if (newFragment == ScreenList.WEBKIT) {
        f = mgr.findFragmentById(WebViewFragment.ID);
        if (f == null) {
            f = new WebViewFragment();
        }
    } else if (newFragment == ScreenList.ABOUT_MENU) {
        f = mgr.findFragmentById(AboutMenuFragment.ID);
        if (f == null) {
            f = new AboutMenuFragment();
        }

    } else {
        throw new IllegalStateException("Unrecognized ScreenList type");
    }

    FrameLayout shadow = (FrameLayout) findViewById(R.id.shadow_content);
    View frags = findViewById(R.id.main_content);
    View wkt = findViewById(R.id.webkit_view);
    shadow.setVisibility(View.GONE);
    shadow.removeAllViews();
    if (newFragment == ScreenList.WEBKIT) {
        frags.setVisibility(View.GONE);
        wkt.setVisibility(View.VISIBLE);
        wkt.invalidate();
    } else {
        wkt.setVisibility(View.GONE);
        frags.setVisibility(View.VISIBLE);
    }

    currentFragment = newFragment;
    BackStackEntry entry = null;
    for (int i = 0; i < mgr.getBackStackEntryCount(); ++i) {
        BackStackEntry e = mgr.getBackStackEntryAt(i);
        if (e.getName().equals(currentFragment.name())) {
            entry = e;
            break;
        }
    }
    if (entry != null) {
        // flush backward, including the screen want to go back to
        mgr.popBackStackImmediate(currentFragment.name(), FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }

    // add transaction to show the screen we want
    FragmentTransaction trans = mgr.beginTransaction();
    trans.replace(R.id.main_content, f);
    trans.addToBackStack(currentFragment.name());
    trans.commit();

    // and see if we should re-initialize...
    if ((currentFragment != ScreenList.INITIALIZATION_DIALOG)
            && Survey.getInstance().shouldRunInitializationTask(getAppName())) {
        WebLogger.getLogger(getAppName()).i(t, "swapToFragmentView -- calling clearRunInitializationTask");
        // and immediately clear the should-run flag...
        Survey.getInstance().clearRunInitializationTask(getAppName());
        // OK we should swap to the InitializationFragment view
        swapToFragmentView(ScreenList.INITIALIZATION_DIALOG);
    } else {
        levelSafeInvalidateOptionsMenu();
    }
}