Now loading of map categories happening after activity start. Fragment saves its state now.

OsmAnd/src/net/osmand/plus/activities/TabActivity.java

@@ -1,12 +1,12 @@
 package net.osmand.plus.activities;
 
-import java.util.List;
-
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
-import android.support.v4.app.FragmentPagerAdapter;
+import android.support.v4.app.FragmentStatePagerAdapter;
 import android.support.v4.view.ViewPager;
 
+import java.util.List;
+
 /**
  * Created by Denis
  * on 26.01.2015.
@@ -34,7 +34,7 @@ public class TabActivity extends ActionBarProgressActivity {
 		pager.setAdapter(new OsmandFragmentPagerAdapter(getSupportFragmentManager(), items));
 	}
 
-	public static class OsmandFragmentPagerAdapter extends FragmentPagerAdapter {
+	public static class OsmandFragmentPagerAdapter extends FragmentStatePagerAdapter {
 
 		private List<TabItem> mTabs;
 

OsmAnd/src/net/osmand/plus/download/BaseDownloadActivity.java

@@ -21,9 +21,11 @@ import net.osmand.plus.download.newimplementation.IndexItemCategoryWithSubcat;
 import java.lang.ref.WeakReference;
 import java.text.MessageFormat;
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * Created by Denis
@@ -33,7 +35,7 @@ public class BaseDownloadActivity extends ActionBarProgressActivity {
 	protected DownloadActivityType type = DownloadActivityType.NORMAL_FILE;
 	protected OsmandSettings settings;
 	public static DownloadIndexesThread downloadListIndexThread;
-	protected List<WeakReference<Fragment>> fragList = new ArrayList<>();
+	protected Set<WeakReference<Fragment>> fragSet = new HashSet<>();
 	protected List<IndexItem> downloadQueue = new ArrayList<>();
 
 	public static final int MAXIMUM_AVAILABLE_FREE_DOWNLOADS = 10;
@@ -217,7 +219,7 @@ public class BaseDownloadActivity extends ActionBarProgressActivity {
 
 	@Override
 	public void onAttachFragment(Fragment fragment) {
-		fragList.add(new WeakReference<Fragment>(fragment));
+		fragSet.add(new WeakReference<Fragment>(fragment));
 	}
 
 	public void makeSureUserCancelDownload() {

OsmAnd/src/net/osmand/plus/download/DownloadActivity.java

@@ -75,6 +75,7 @@ public class DownloadActivity extends BaseDownloadActivity {
 	public static final String UPDATES_TAB = "updates";
 	public static final String SINGLE_TAB = "SINGLE_TAB";
 	private List<DownloadActivityType> downloadTypes = new ArrayList<DownloadActivityType>();
+	private List<IndexItemCategoryWithSubcat> cats;
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
@@ -164,13 +165,13 @@ public class DownloadActivity extends BaseDownloadActivity {
 			public void onClick(View v) {
 				getEntriesToDownload().clear();
 				updateDownloadButton();
-				for (WeakReference<Fragment> ref : fragList) {
+				for (WeakReference<Fragment> ref : fragSet) {
 					Fragment f = ref.get();
 					if (f instanceof OsmAndListFragment) {
-						if (!f.isDetached() && ((OsmAndListFragment) f).getListAdapter() instanceof ArrayAdapter) {
+						if (f.isAdded() && ((OsmAndListFragment) f).getListAdapter() instanceof ArrayAdapter) {
 							((ArrayAdapter) ((OsmAndListFragment) f).getListAdapter()).notifyDataSetChanged();
 						}
-					} else if (!f.isDetached() && f instanceof OsmandExpandableListFragment &&
+					} else if (f.isAdded() && f instanceof OsmandExpandableListFragment &&
 							((OsmandExpandableListFragment) f).getAdapter() instanceof BaseExpandableListAdapter) {
 						((BaseExpandableListAdapter) ((OsmandExpandableListFragment) f).getAdapter()).notifyDataSetChanged();
 					}
@@ -283,10 +284,10 @@ public class DownloadActivity extends BaseDownloadActivity {
 
 	@Override
 	public void updateDownloadList(List<IndexItem> list) {
-		for (WeakReference<Fragment> ref : fragList) {
+		for (WeakReference<Fragment> ref : fragSet) {
 			Fragment f = ref.get();
 			if (f instanceof UpdatesIndexFragment) {
-				if (!f.isDetached()) {
+				if (f.isAdded()) {
 					((UpdatesIndexFragment) f).updateItemsList(list);
 				}
 			}
@@ -295,10 +296,10 @@ public class DownloadActivity extends BaseDownloadActivity {
 
 	@Override
 	public void categorizationFinished(List<IndexItem> filtered, List<IndexItemCategory> cats) {
-		for (WeakReference<Fragment> ref : fragList) {
+		for (WeakReference<Fragment> ref : fragSet) {
 			Fragment f = ref.get();
 			if (f instanceof DownloadIndexFragment) {
-				if (!f.isDetached()) {
+				if (f.isAdded()) {
 					((DownloadIndexFragment) f).categorizationFinished(filtered, cats);
 				}
 			}
@@ -308,22 +309,28 @@ public class DownloadActivity extends BaseDownloadActivity {
 	@Override
 	public void onCategorizationFinished(List<IndexItem> filtered,
 										 List<IndexItemCategoryWithSubcat> cats) {
-		for (WeakReference<Fragment> ref : fragList) {
+		boolean isPushed = false;
+		for (WeakReference<Fragment> ref : fragSet) {
 			Fragment f = ref.get();
 			if (f instanceof NewLocalIndexesFragment) {
-				if (!f.isDetached()) {
+				if (f.isAdded()) {
+					isPushed = true;
 					((NewLocalIndexesFragment) f).onCategorizationFinished(filtered, cats);
 				}
 			}
 		}
+		if (!isPushed) {
+			this.cats = cats;
+		}
 	}
 
 	public void downloadListUpdated() {
-		for (WeakReference<Fragment> ref : fragList) {
+		for (WeakReference<Fragment> ref : fragSet) {
 			Fragment f = ref.get();
 			if (f instanceof DownloadIndexFragment) {
-				if (!f.isDetached()) {
+				if (f.isAdded()) {
-					((DownloadIndexAdapter) ((DownloadIndexFragment) f).getExpandableListAdapter()).notifyDataSetInvalidated();
+					((DownloadIndexAdapter) ((DownloadIndexFragment) f).getExpandableListAdapter())
+							.notifyDataSetInvalidated();
 				}
 			}
 		}
@@ -331,15 +338,16 @@ public class DownloadActivity extends BaseDownloadActivity {
 
 	@Override
 	public void downloadedIndexes() {
-		for (WeakReference<Fragment> ref : fragList) {
+		for (WeakReference<Fragment> ref : fragSet) {
 			Fragment f = ref.get();
 			if (f instanceof LocalIndexesFragment) {
-				if (!f.isDetached()) {
+				if (f.isAdded()) {
 					((LocalIndexesFragment) f).reloadData();
 				}
 			} else if (f instanceof DownloadIndexFragment) {
-				if (!f.isDetached()) {
+				if (f.isAdded()) {
-					DownloadIndexAdapter adapter = ((DownloadIndexAdapter) ((DownloadIndexFragment) f).getExpandableListAdapter());
+					DownloadIndexAdapter adapter = ((DownloadIndexAdapter)
+							((DownloadIndexFragment) f).getExpandableListAdapter());
 					if (adapter != null) {
 						adapter.setLoadedFiles(getIndexActivatedFileNames(), getIndexFileNames());
 
@@ -446,9 +454,10 @@ public class DownloadActivity extends BaseDownloadActivity {
 			findViewById(R.id.wikiButton).setVisibility(wikipediaItems.size() == 0 ? View.GONE : View.VISIBLE);
 		}
 
-		for (WeakReference<Fragment> ref : fragList) {
+		for (WeakReference<Fragment> ref : fragSet) {
 			Fragment f = ref.get();
-			if (!f.isDetached()) {
+			if (f != null)
+				if (f.isAdded()) {
 					if (f instanceof OsmandExpandableListFragment) {
 						ExpandableListAdapter ad = ((OsmandExpandableListFragment) f).getExpandableListView()
 								.getExpandableListAdapter();
@@ -533,6 +542,12 @@ public class DownloadActivity extends BaseDownloadActivity {
 		return downloadListIndexThread != null ? downloadListIndexThread.getIndexFileNames() : null;
 	}
 
+	public List<IndexItemCategoryWithSubcat> getCats() {
+		List<IndexItemCategoryWithSubcat> toReturn = cats;
+		cats = null;
+		return toReturn;
+	}
+
 	public void showDialogToDownloadMaps(Collection<String> maps) {
 		int count = 0;
 		int sz = 0;

OsmAnd/src/net/osmand/plus/download/DownloadIndexFragment.java

@@ -1,17 +1,6 @@
 package net.osmand.plus.download;
 
 
-import java.io.File;
-import java.io.FilenameFilter;
-import java.text.MessageFormat;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-
-import net.osmand.access.AccessibleToast;
-import net.osmand.plus.R;
-import net.osmand.plus.activities.OsmandExpandableListFragment;
-import net.osmand.plus.base.BasicProgressAsyncTask;
 import android.os.Bundle;
 import android.support.v4.view.MenuItemCompat;
 import android.support.v7.app.ActionBar;
@@ -31,6 +20,18 @@ import android.widget.ExpandableListAdapter;
 import android.widget.ExpandableListView;
 import android.widget.Toast;
 
+import net.osmand.access.AccessibleToast;
+import net.osmand.plus.R;
+import net.osmand.plus.activities.OsmandExpandableListFragment;
+import net.osmand.plus.base.BasicProgressAsyncTask;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
 
 public class DownloadIndexFragment extends OsmandExpandableListFragment {
 

OsmAnd/src/net/osmand/plus/download/DownloadIndexesThread.java

@@ -430,7 +430,7 @@ public class DownloadIndexesThread {
 							AccessibleToast.makeText(uiActivity, R.string.basemap_was_selected_to_download,
 									Toast.LENGTH_LONG).show();
 							if (uiActivity instanceof DownloadActivity) {
-								((DownloadActivity) uiActivity).updateDownloadButton();
+								uiActivity.updateDownloadButton();
 							}
 						}
 					}

OsmAnd/src/net/osmand/plus/download/newimplementation/NewLocalIndexesFragment.java

@@ -30,12 +30,14 @@ import org.apache.commons.logging.Log;
 
 import java.io.File;
 import java.text.MessageFormat;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
 
 public class NewLocalIndexesFragment extends OsmAndListFragment {
 	private static final Log LOG = PlatformUtil.getLog(NewLocalIndexesFragment.class);
+	public static final String CATEGORIES = "categories";
 	private static final MessageFormat formatGb = new MessageFormat("{0, number,<b>#.##</b>} GB", Locale.US);
 
 	public static final int RELOAD_ID = 0;
@@ -55,6 +57,16 @@ public class NewLocalIndexesFragment extends OsmAndListFragment {
 		mAdapter = new CategoriesAdapter(getActivity(), getMyApplication());
 		listView.setAdapter(mAdapter);
 
+		List<IndexItemCategoryWithSubcat> cats = ((DownloadActivity) getActivity()).getCats();
+		if (cats != null) {
+			onCategorizationFinished(null, cats);
+		}
+		if (savedInstanceState != null) {
+			List<IndexItemCategoryWithSubcat> savedCats =
+					savedInstanceState.getParcelableArrayList(CATEGORIES);
+			onCategorizationFinished(null, savedCats);
+		}
+
 		View header = inflater.inflate(R.layout.local_index_fragment_header, listView, false);
 		initMemoryConsumedCard(header);
 		DownloadsUiInitHelper.initFreeVersionBanner(header, getMyApplication().getSettings(),
@@ -102,6 +114,17 @@ public class NewLocalIndexesFragment extends OsmAndListFragment {
 		return super.onOptionsItemSelected(item);
 	}
 
+	@Override
+	public void onSaveInstanceState(Bundle outState) {
+		LOG.debug("onSaveInstanceState()");
+		ArrayList<IndexItemCategoryWithSubcat> items = new ArrayList<>(mAdapter.getCount());
+		for (int i = 0; i < mAdapter.getCount(); i++) {
+			items.add(mAdapter.getItem(i));
+		}
+		outState.putParcelableArrayList(CATEGORIES, items);
+		super.onSaveInstanceState(outState);
+	}
+
 	@Override
 	public void onListItemClick(ListView l, View v, int position, long id) {
 		FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction();
@@ -115,9 +138,11 @@ public class NewLocalIndexesFragment extends OsmAndListFragment {
 	}
 
 	public void onCategorizationFinished(List<IndexItem> filtered, List<IndexItemCategoryWithSubcat> cats) {
+		if (mAdapter != null) {
 			mAdapter.clear();
 			mAdapter.addAll(cats);
 		}
+	}
 
 	private static class CategoriesAdapter extends ArrayAdapter<IndexItemCategoryWithSubcat> {
 		private final OsmandApplication osmandApplication;

OsmAnd/src/net/osmand/plus/download/newimplementation/SubcategoriesFragment.java

@@ -15,7 +15,6 @@ import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.TextView;
 
-import net.osmand.PlatformUtil;
 import net.osmand.plus.OsmandApplication;
 import net.osmand.plus.OsmandSettings;
 import net.osmand.plus.R;
@@ -24,10 +23,7 @@ import net.osmand.plus.download.DownloadActivityType;
 import net.osmand.plus.download.IndexItem;
 import net.osmand.plus.helpers.HasName;
 
-import org.apache.commons.logging.Log;
-
 public class SubcategoriesFragment extends Fragment {
-	private static final Log LOG = PlatformUtil.getLog(SubcategoriesFragment.class);
 	private static final String CATEGORY = "category";
 
 	@Nullable