feedsactivity: restore headline selection state when going back from headlinesactivity

org.fox.ttrss/src/main/java/org/fox/ttrss/FeedsActivity.java

@@ -447,6 +447,7 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 			intent.putExtra("searchQuery", hf.getSearchQuery());
             //intent.putParcelableArrayListExtra("articles", hf.getArticles());
             intent.putExtra("articles", (Parcelable)hf.getAllArticles());
+            intent.putExtra("selectedArticles", (Parcelable)hf.getSelectedArticles());
 
             /* if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                 startActivityForResult(intent, HEADLINES_REQUEST, ActivityOptions.makeSceneTransitionAnimation(this).toBundle());
@@ -498,13 +499,15 @@ public class FeedsActivity extends OnlineActivity implements HeadlinesEventListe
 
             //ArrayList<Article> tmp = data.getParcelableArrayListExtra("articles");
             Article article = data.getParcelableExtra("activeArticle");
-            ArticleList tmp = data.getParcelableExtra("articles");
+            ArticleList articles = data.getParcelableExtra("articles");
+            ArticleList selectedArticles = data.getParcelableExtra("selectedArticles");
 
-            if (tmp != null) {
+            if (articles != null) {
                 HeadlinesFragment hf = (HeadlinesFragment)getSupportFragmentManager().findFragmentByTag(FRAG_HEADLINES);
 
                 if (hf != null) {
-                    hf.setArticles(tmp);
+                    hf.setArticles(articles);
+                    hf.setSelectedArticles(selectedArticles);
                     hf.setActiveArticle(article);
                 }
             }

org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesActivity.java

@@ -21,6 +21,7 @@ import org.fox.ttrss.types.Feed;
 public class HeadlinesActivity extends OnlineActivity implements HeadlinesEventListener {
 	private final String TAG = this.getClass().getSimpleName();
 	protected ArticleList m_articles = new ArticleList();
+    protected ArticleList m_selectedArticles = new ArticleList();
 
 	protected SharedPreferences m_prefs;
     private Article m_activeArticle;
@@ -50,6 +51,7 @@ public class HeadlinesActivity extends OnlineActivity implements HeadlinesEventL
 
 		if (savedInstanceState != null) {
             m_articles = savedInstanceState.getParcelable("articles");
+            m_selectedArticles = savedInstanceState.getParcelable("selectedArticles");
         } else {
 			Intent i = getIntent();
 			
@@ -83,12 +85,22 @@ public class HeadlinesActivity extends OnlineActivity implements HeadlinesEventL
                     m_articles.addAll(tmp);
                 }
 
-				FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
+                tmp = i.getParcelableExtra("selectedArticles");
+
+                if (tmp != null) {
+                    m_selectedArticles.addAll(tmp);
+                }
+
+                FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
 
                 final HeadlinesFragment hf = new HeadlinesFragment();
                 hf.initialize(feed, article, true, m_articles);
                 hf.setSearchQuery(searchQuery);
 
+                if (!isPortrait() && !isSmallScreen()) {
+                    hf.setSelectedArticles(m_selectedArticles);
+                }
+
                 ft.replace(R.id.headlines_fragment, hf, FRAG_HEADLINES);
                 ft.replace(R.id.article_fragment, new LoadingFragment(), null);
 
@@ -144,6 +156,7 @@ public class HeadlinesActivity extends OnlineActivity implements HeadlinesEventL
 		super.onSaveInstanceState(out);
 
         out.putParcelable("articles", m_articles);
+        out.putParcelable("selectedArticles", m_selectedArticles);
 		
 		GlobalState.getInstance().save(out);
 	}
@@ -304,9 +317,17 @@ public class HeadlinesActivity extends OnlineActivity implements HeadlinesEventL
 	public void onBackPressed() {
         Intent resultIntent = new Intent();
 
+        HeadlinesFragment hf = (HeadlinesFragment) getSupportFragmentManager().findFragmentByTag(FRAG_HEADLINES);
+
         resultIntent.putExtra("articles", (Parcelable) m_articles);
         resultIntent.putExtra("activeArticle", m_activeArticle);
 
+        if (hf != null && !isPortrait() && !isSmallScreen()) {
+            resultIntent.putExtra("selectedArticles", (Parcelable) hf.getSelectedArticles());
+        } else {
+            resultIntent.putExtra("selectedArticles", (Parcelable) m_selectedArticles);
+        }
+
         setResult(Activity.RESULT_OK, resultIntent);
 
         super.onBackPressed();

org.fox.ttrss/src/main/java/org/fox/ttrss/HeadlinesFragment.java

@@ -73,7 +73,7 @@ import java.util.HashMap;
 import java.util.TimeZone;
 
 public class HeadlinesFragment extends Fragment implements OnItemClickListener, OnScrollListener {
-	public static enum ArticlesSelection { ALL, NONE, UNREAD }
+    public static enum ArticlesSelection { ALL, NONE, UNREAD }
 
     public static final int FLAVOR_IMG_MIN_WIDTH = 128;
     public static final int FLAVOR_IMG_MIN_HEIGHT = 128;
@@ -685,7 +685,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
         private void updateTextCheckedState(HeadlineViewHolder holder, Article item) {
             String tmp = item.title.length() > 0 ? item.title.substring(0, 1) : "?";
 
-            if (m_selectedArticles.contains(item)) {
+            if (m_selectedArticles.containsId(item.id)) {
                 holder.textImage.setImageDrawable(m_drawableBuilder.build(" ", 0xff616161));
 
                 holder.textChecked.setVisibility(View.VISIBLE);
@@ -773,7 +773,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
                     public void onClick(View view) {
                         Log.d(TAG, "textImage : onclicked");
 
-                        if (!m_selectedArticles.contains(article)) {
+                        if (!m_selectedArticles.containsId(article.id)) {
                             m_selectedArticles.add(article);
                         } else {
                             m_selectedArticles.remove(article);
@@ -1053,7 +1053,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 			
 
 			if (holder.selectionBoxView != null) {
-				holder.selectionBoxView.setChecked(m_selectedArticles.contains(article));
+				holder.selectionBoxView.setChecked(m_selectedArticles.containsId(article.id));
 				holder.selectionBoxView.setOnClickListener(new OnClickListener() {
 					
 					@Override
@@ -1061,7 +1061,7 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 						CheckBox cb = (CheckBox)view;
 						
 						if (cb.isChecked()) {
-							if (!m_selectedArticles.contains(article))
+							if (!m_selectedArticles.containsId(article.id))
 								m_selectedArticles.add(article);
 						} else {
 							m_selectedArticles.remove(article);
@@ -1149,11 +1149,26 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener,
 				}
 			}
 		}
-		
+
-		m_adapter.notifyDataSetChanged();
+        if (m_adapter != null) {
+            m_adapter.notifyDataSetChanged();
+        }
 	}
 
-	public Article getArticleAtPosition(int position) {
+    public void setSelectedArticles(ArticleList selectedArticles) {
+        if (selectedArticles != null) {
+            m_selectedArticles.clear();
+            m_selectedArticles.addAll(selectedArticles);
+
+            if (m_adapter != null) {
+                m_adapter.notifyDataSetChanged();
+            }
+        }
+    }
+
+
+
+    public Article getArticleAtPosition(int position) {
 		try {
 			return m_adapter.getItem(position);
 		} catch (IndexOutOfBoundsException e) {

org.fox.ttrss/src/main/java/org/fox/ttrss/types/ArticleList.java

@@ -1,11 +1,9 @@
 package org.fox.ttrss.types;
 
-import java.util.ArrayList;
-
-
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.util.Log;
+
+import java.util.ArrayList;
 
 @SuppressWarnings("serial")
 public class ArticleList extends ArrayList<Article> implements Parcelable {
@@ -18,7 +16,15 @@ public class ArticleList extends ArrayList<Article> implements Parcelable {
 	public void writeToParcel(Parcel out, int flags) {
 		out.writeList(this);
 	}
-	
+
+    public boolean containsId(int id) {
+        return findById(id) != null;
+    }
+
+    public boolean contains(Article article) {
+        return containsId(article.id);
+    }
+
 	public Article findById(int id) {
 		for (Article a : this) {
 			if (a.id == id)
@@ -36,15 +42,7 @@ public class ArticleList extends ArrayList<Article> implements Parcelable {
 	public ArticleList(Parcel in) {		
 		readFromParcel(in);
 	}
-	
+
-	public boolean containsId(int id) {
-		for (Article a : this) {
-			if (a.id == id)
-				return true;
-		}
-		return false;
-	}
-	
 	@SuppressWarnings("rawtypes")
 	public static final Parcelable.Creator CREATOR =
     	new Parcelable.Creator() {