app/src/main/java/de/dhbwloe/campusapp/NavigationManager.java

   1 package de.dhbwloe.campusapp;
   2
   3 import android.os.Bundle;
   4 import android.support.v4.app.Fragment;
   5 import android.support.v4.app.FragmentActivity;
   6 import android.support.v4.app.FragmentTransaction;
   7 import android.view.Gravity;
   8 import android.view.View;
   9 import android.widget.LinearLayout;
  10 import android.widget.PopupWindow;
  11
  12 import java.lang.reflect.Constructor;
  13 import java.lang.reflect.InvocationTargetException;
  14 import java.util.ArrayList;
  15 import java.util.List;
  16
  17 import de.dhbwloe.campusapp.fragments.PopupFragment;
  18
  19 /**
  20  * Created by pk910 on 19.01.2016.
  21  */
  22 public class NavigationManager {
  23     private class NavPage {
  24         String name;
  25         Class<CampusAppFragment> fragmentClass;
  26         int fragmentType; // 0 = normal; 1 = fullscreen; 2 = popup
  27     };
  28
  29     private CampusAppContext AppContext;
  30     private NavPage oCurrentPage;
  31     private NavPage oParentPage;
  32     private Fragment oCurrentFragment;
  33     private Fragment oParentFragment;
  34     private int iFragmentContainerId;
  35     private ArrayList<NavPage> lNavigationPages = new ArrayList<NavPage>();
  36
  37     public NavigationManager(CampusAppContext context, int fragmentContainer) {
  38         AppContext = context;
  39         iFragmentContainerId = fragmentContainer;
  40         oCurrentPage = null;
  41     }
  42
  43     public void registerPage(String name, Class<?> fragment, int fragmentType) {
  44         NavPage page = new NavPage();
  45         page.name = name;
  46         page.fragmentClass = (Class<CampusAppFragment>) fragment;
  47         page.fragmentType = fragmentType;
  48         lNavigationPages.add(page);
  49     }
  50
  51     public String getCurrentPageName() {
  52         if(oCurrentPage == null)
  53             return null;
  54         if(oCurrentPage.fragmentType == 3 && oParentFragment != null){
  55             if(oCurrentFragment.isAdded())
  56                 return oCurrentPage.name;
  57             else {
  58                 closeDialog();
  59             }
  60         }
  61         return oCurrentPage.name;
  62     }
  63
  64     public CampusAppFragment getCurrentFragment() {
  65         if(oCurrentPage == null)
  66             return null;
  67         if(oCurrentPage.fragmentType != 3)
  68             return (CampusAppFragment)oCurrentFragment;
  69         return null;
  70     }
  71
  72     public void navigatePage(String name) {
  73         navigatePage(name, null, true);
  74     }
  75
  76     public void navigatePage(String name, Bundle args) {
  77         navigatePage(name, args, true);
  78     }
  79
  80     public void navigatePage(String name, Bundle args, boolean history) {
  81
  82         NavPage page = getPageByName(name);
  83         if(page == null)
  84             return;
  85         Fragment fragment;
  86
  87         if(page.fragmentType == 3) {
  88             PopupFragment popupFragment = new PopupFragment();
  89             if(args == null)
  90                 args = new Bundle();
  91             args.putString("target", "#"+page.name);
  92             fragment = popupFragment;
  93         } else {
  94             fragment = getFragmentOfPage(page);
  95         }
  96
  97         fragment.setArguments(args);
  98
  99         FragmentActivity fragmentActivity = (FragmentActivity) AppContext.getMainActivity();
 100         FragmentTransaction transaction = fragmentActivity.getSupportFragmentManager().beginTransaction();
 101
 102         if (oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 103             transaction.remove(oCurrentFragment);
 104             oCurrentPage = oParentPage;
 105             oCurrentFragment = oParentFragment;
 106         }
 107         if (page.fragmentType == 3) {
 108             transaction.add(fragment, "popup");
 109             oParentPage = oCurrentPage;
 110             oParentFragment = oCurrentFragment;
 111             history = false;
 112         } else {
 113             // remove fragments
 114             List<Fragment> al = fragmentActivity.getSupportFragmentManager().getFragments();
 115             if(al != null) {
 116                 for (Fragment frag : al) {
 117                     if (frag != null && frag.isAdded()) {
 118                         transaction.remove(frag);
 119                     }
 120                 }
 121             }
 122             transaction.add(iFragmentContainerId, fragment);
 123         }
 124         if (history)
 125             transaction.addToBackStack(null);
 126
 127         oCurrentPage = page;
 128         oCurrentFragment = fragment;
 129
 130         transaction.commit();
 131     }
 132
 133     private NavPage getPageByName(String name) {
 134         NavPage page = null;
 135         for(int i = 0; i < lNavigationPages.size(); i++) {
 136             if(lNavigationPages.get(i).name.equalsIgnoreCase(name)) {
 137                 page = lNavigationPages.get(i);
 138                 break;
 139             }
 140         }
 141         if(page == null)
 142             return null;
 143
 144         return page;
 145     }
 146
 147     private CampusAppFragment getFragmentOfPage(NavPage page) {
 148         Class<CampusAppFragment> fragmentClass = page.fragmentClass;
 149         Constructor fragmentConstructor;
 150         CampusAppFragment fragment;
 151         try {
 152             fragmentConstructor = fragmentClass.asSubclass(fragmentClass).getConstructor();
 153             fragment = (CampusAppFragment)fragmentConstructor.newInstance(new Object[]{});
 154         } catch (Exception e) {
 155             return null;
 156         }
 157         return fragment;
 158     }
 159
 160     public CampusAppFragment getPageFragment(String name) {
 161         NavPage page = getPageByName(name);
 162         if(page == null)
 163             return null;
 164         return getFragmentOfPage(page);
 165     }
 166
 167     public PopupFragment getDialog() {
 168         if(oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 169             PopupFragment fragment = (PopupFragment) oCurrentFragment;
 170             return fragment;
 171         }
 172         return null;
 173     }
 174
 175     public boolean closeDialog() {
 176         if(oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 177             PopupFragment fragment = (PopupFragment) oCurrentFragment;
 178             boolean wasAdded = false;
 179             if(oCurrentFragment.isAdded()) {
 180                 fragment.destroyView();
 181
 182                 FragmentActivity fragmentActivity = (FragmentActivity) AppContext.getMainActivity();
 183                 FragmentTransaction transaction = fragmentActivity.getSupportFragmentManager().beginTransaction();
 184
 185                 transaction.remove(oCurrentFragment);
 186                 transaction.commit();
 187                 wasAdded = true;
 188             }
 189
 190             oCurrentPage = oParentPage;
 191             oCurrentFragment = oParentFragment;
 192
 193             return wasAdded;
 194         }
 195         return false;
 196     }
 197
 198     public boolean back() {
 199         return closeDialog();
 200     }
 201
 202 }