Settings + adding mutexes whenever possible.

android/AndroidManifest.xml

@@ -25,7 +25,29 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />                
             </intent-filter>
+            
+            <meta-data android:name="android.app.searchable"
+            android:resource="@xml/searchable" />
+            
+            
         </activity>
+     <!--   
+        <activity
+            android:name=".SearchResultActivity"
+            android:label="@string/app_name"
+            android:configChanges="orientation"
+    		android:screenOrientation="portrait" >
+            <intent-filter>
+                           <action android:name="android.intent.action.SEARCH" />
+            </intent-filter>
+            
+            <meta-data android:name="android.app.searchable"
+            android:resource="@xml/searchable" />
+            
+            
+        </activity>
+        
+        -->
     </application>
 
 </manifest>

android/res/layout/fragment_welcome.xml

@@ -2,7 +2,6 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@drawable/background"
     android:orientation="vertical"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"

android/res/layout/main_page_list_element.xml

@@ -32,7 +32,6 @@
             android:background="@drawable/see_more_button"
             android:gravity="right|center_vertical"
             android:paddingRight="28dp"
-            android:text="Узнать больше"
             android:textSize="16sp" />
 
     </LinearLayout>

android/res/layout/main_page_list_header.xml

@@ -9,7 +9,7 @@
     tools:context="fishrungames.bashgid.MainPageFragment" >
 
     <TextView
-        android:id="@+id/textView1"
+        android:id="@+id/selectLanguageTextView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"

android/res/layout/news_page_list_element.xml

@@ -32,14 +32,12 @@
             android:gravity="left|center_vertical"
             android:minHeight="0dip"
             android:minWidth="0dip"
-            android:text="yrrttedf"
             android:textColor="@color/text_grey" />
 
         <TextView
             android:id="@+id/textView"
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+            android:layout_height="wrap_content" />
-            android:text="rtrrtrt" />
 
     </LinearLayout>
 

android/res/menu/global.xml

@@ -1,7 +1,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto" >
 
-    <item android:id="@+id/search"
+    <item android:id="@+id/action_search"
           android:title="@string/search_title"
           android:icon="@drawable/abc_ic_search_api_mtrl_alpha"
           app:showAsAction="always"

android/res/values-ru/strings.xml

@@ -8,6 +8,9 @@
     
     <string name="action_settings">Настройки</string>
     
+    <string name="select_language">Выберите язык:</string>
+    
+    
     <string name="search_title">Поиск</string>
     
     <string name="news_record_not_available">Запись недоступна</string>

android/res/values-zh-rCN/strings.xml

@@ -6,6 +6,9 @@
     <string name="navigation_drawer_close">关闭导航窗口</string>
 	<string name="action_settings">设置</string>  
     
+	<string name="select_language">选择语言:</string>
+    
+	
     <string name="search_title">搜索标题</string>
     
     <string name="news_record_not_available">无法查看新闻记录</string>

android/res/values/strings.xml

@@ -7,6 +7,7 @@
 	<string name="action_settings">Settings</string>
     
     
+    <string name="select_language">Select language:</string>
     
     <string name="lang_english">English</string>
     <string name="lang_russian">Русский</string>
@@ -15,6 +16,8 @@
     
     
     <string name="search_title">Search</string>
+    <string name="search_hint">Search hint</string>
+    
     
     <string name="news_record_not_available">Record is not available</string>
     <string name="other_news">Other news…</string>

android/src/fishrungames/bashgid/MainActivity.java

@@ -6,22 +6,22 @@ import java.util.Locale;
 import fishrungames.bashgid.core.NewsManager.NewsRecord;
 import fishrungames.bashgid.core.db.NewsDataSource;
 import android.support.v7.app.ActionBarActivity;
+import android.support.v7.widget.SearchView;
 import android.support.v4.app.Fragment;
+import android.app.SearchManager;
+import android.content.Context;
 import android.content.res.Configuration;
 import android.os.Bundle;
 
 import android.view.Menu;
+import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 
 import android.support.v4.widget.DrawerLayout;
 
-
+public class MainActivity extends ActionBarActivity implements NavigationDrawerFragment.NavigationDrawerCallbacks
-
+{
-
-public class MainActivity extends ActionBarActivity 
-implements NavigationDrawerFragment.NavigationDrawerCallbacks {
-
 
 	public static final String TAG_FROM_MAINFRAGMENT_TO_NEWSRECORDFRAGMENT = "TAG_FROM_MAINFRAGMENT_TO_NEWSRECORDFRAGMENT";
 	public static final String TAG_FROM_NEWSLISTFRAGMENT_TO_NEWSRECORDFRAGMENT = "TAG_FROM_NEWSLISTFRAGMENT_TO_NEWSRECORDFRAGMENT";
@@ -30,43 +30,44 @@ implements NavigationDrawerFragment.NavigationDrawerCallbacks {
 
 	private NavigationDrawerFragment mNavigationDrawerFragment = null;
 
-	public NewsDataSource newsDataSource;
+	public NewsDataSource newsDataSource = null;
 
-    @Override
+	@Override
-    protected void onCreate(Bundle savedInstanceState) {
+	protected void onCreate(Bundle savedInstanceState)
-        super.onCreate(savedInstanceState);
+	{
+		super.onCreate(savedInstanceState);
 
-        setContentView(R.layout.activity_main);
+		setContentView(R.layout.activity_main);
 
-        SetupDrawer();
+		SetupDrawer();
 
-        getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, new WelcomeFragment()).commit();
+		getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, new WelcomeFragment()).commit();
 
-        instance = this;
+		instance = this;
 
-        newsDataSource = new NewsDataSource(this);
 	
-        newsDataSource.open();
+		newsDataSource = new NewsDataSource(this);
 
-    }
+		newsDataSource.open();
 
-    public static MainActivity getInstance()
+	}
-    {
+
+	public static MainActivity getInstance()
+	{
 		return instance;
 
-    }
+	}
 
-    
+	public void OnSelectEnglish(View view)
-    public void OnSelectEnglish(View view)
 	{
-        Locale.setDefault(Locale.US);
+		Locale.setDefault(Locale.US);
-        Configuration config = new Configuration();
+		Configuration config = new Configuration();
-        config.locale = Locale.US;
+		config.locale = Locale.US;
-        getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
+		getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
 
-        getSupportActionBar().setTitle(R.string.app_name);
+		getSupportActionBar().setTitle(R.string.app_name);
 
-        SetupDrawer();
+		SetupDrawer();
 
 		OpenMainScreen();
 	}
@@ -74,33 +75,34 @@ implements NavigationDrawerFragment.NavigationDrawerCallbacks {
 	public void OnSelectRussian(View view)
 	{
 		Locale locale = new Locale("ru");
-        Locale.setDefault(locale);
+		Locale.setDefault(locale);
-        Configuration config = new Configuration();
+		Configuration config = new Configuration();
-        config.locale = locale;
+		config.locale = locale;
-        getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
+		getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
 
-        getSupportActionBar().setTitle(R.string.app_name);
+		getSupportActionBar().setTitle(R.string.app_name);
-        SetupDrawer();
+		SetupDrawer();
 
 		OpenMainScreen();
 	}
 
 	public void OnSelectChinese(View view)
 	{
-        Locale.setDefault(Locale.CHINA);
+		Locale.setDefault(Locale.CHINA);
-        Configuration config = new Configuration();
+		Configuration config = new Configuration();
-        config.locale = Locale.CHINA;
+		config.locale = Locale.CHINA;
-        getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
+		getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
 
-        getSupportActionBar().setTitle(R.string.app_name);
+		getSupportActionBar().setTitle(R.string.app_name);
-        SetupDrawer();
+		SetupDrawer();
 
 		OpenMainScreen();
 	}
 
 	public void OnSelectSemiDetails(Integer pos)
 	{
-		//getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, new SemiDetailsFragment()).addToBackStack(null).commit();
+		// getSupportFragmentManager().beginTransaction().add(R.id.fragment_container,
+		// new SemiDetailsFragment()).addToBackStack(null).commit();
 	}
 
 	public void OpenMainScreen()
@@ -119,12 +121,22 @@ implements NavigationDrawerFragment.NavigationDrawerCallbacks {
 		mNavigationDrawerFragment.EnableDrawer();
 	}
 	
+	public void OpenSettingsScreen()
+	{
+
+		getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new SettingsFragment()).commit();
+
+		mNavigationDrawerFragment.EnableDrawer();
+	}
+
 	public void OpenNewsRecordScreen(NewsRecord newsRecord, String tag)
 	{
-		//Xperimental -- addToBackStack provoke error "Class not found". Need to resolve somehow!
+		// Xperimental -- addToBackStack provoke error "Class not found". Need
-		//getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new NewsRecordFragment(newsRecord)).addToBackStack(null).commit();
+		// to resolve somehow!
+		// getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
+		// new NewsRecordFragment(newsRecord)).addToBackStack(null).commit();
 
-		//I added workaround:
+		// I added workaround:
 
 		NewsRecordFragment newsRecordFragment = new NewsRecordFragment(newsRecord);
 
@@ -143,98 +155,111 @@ implements NavigationDrawerFragment.NavigationDrawerCallbacks {
 	public void SetupDrawer()
 	{
 
-	
+		mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
-		mNavigationDrawerFragment = (NavigationDrawerFragment)
-				getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
 
 		if (mNavigationDrawerFragment != null)
 		{
 
-        // Set up the drawer.
+			// Set up the drawer.
-        mNavigationDrawerFragment.setUp(
+			mNavigationDrawerFragment.setUp(R.id.navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout));
-                R.id.navigation_drawer,
-                (DrawerLayout) findViewById(R.id.drawer_layout));
 		}
 	}
 
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu)
+	{
+		
+		MenuInflater inflater = getMenuInflater();
+	    inflater.inflate(R.menu.global, menu);
+
+		/*
+		SearchManager searchManager =
+	 	           (SearchManager) getSystemService(Context.SEARCH_SERVICE);
+	 	    SearchView searchView =
+	 	            (SearchView) menu.findItem(R.id.action_search).getActionView();
+	 	    searchView.setSearchableInfo(
+	 	            searchManager.getSearchableInfo(getComponentName()));
+*/
+	 		
+		
+		return super.onCreateOptionsMenu(menu);
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item)
+	{
+		// Handle action bar item clicks here. The action bar will
+		// automatically handle clicks on the Home/Up button, so long
+		// as you specify a parent activity in AndroidManifest.xml.
+		int id = item.getItemId();
+		if (id == R.id.action_settings)
+		{
+			return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	public void onNavigationDrawerItemSelected(int position)
+	{
+		if (position == 1)
+		{
+			OpenMainScreen();
+		}
+		else if (position == 2)
+		{
+			OpenNewsScreen();
+		}
+		else if (position == 8)
+		{
+			OpenSettingsScreen();
+		}
+	}
+
+	@Override
+	public void onBackPressed()
+	{
+
+		if (getSupportFragmentManager().findFragmentByTag(TAG_FROM_MAINFRAGMENT_TO_NEWSRECORDFRAGMENT) != null)
+		{
+			OpenMainScreen();
+
+			return;
+		}
+
+		if (getSupportFragmentManager().findFragmentByTag(TAG_FROM_NEWSLISTFRAGMENT_TO_NEWSRECORDFRAGMENT) != null)
+		{
+			OpenNewsScreen();
+
+			return;
+		}
+
+		super.onBackPressed();
+
+		/*
+		 * AddToBackStack is falling. Here is workaround
+		 * if(getSupportFragmentManager().getBackStackEntryCount() != 0) {
+		 * getSupportFragmentManager().popBackStack(); } else {
+		 * super.onBackPressed(); }
+		 */
+	}
+
+	@Override
+	protected void onResume()
+	{
+		newsDataSource.open();		
+		super.onResume();
+	}
+
+	@Override
+	protected void onPause()
+	{
+		newsDataSource.close();
+		
+		super.onPause();
+	}
+	
 	
 
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-    	
-        return super.onCreateOptionsMenu(menu);
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        // Handle action bar item clicks here. The action bar will
-        // automatically handle clicks on the Home/Up button, so long
-        // as you specify a parent activity in AndroidManifest.xml.
-        int id = item.getItemId();
-        if (id == R.id.action_settings) {
-            return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-    
-    
-    @Override
-    public void onNavigationDrawerItemSelected(int position)
-    {
-    	if (position == 1)
-    	{
-    		OpenMainScreen();
-    	}
-    	else if (position == 2)
-    	{
-    		OpenNewsScreen();
-    	}
-    }
-
-    
-    
-    @Override
-    public void onBackPressed() {
-    
-        if ( getSupportFragmentManager().findFragmentByTag(TAG_FROM_MAINFRAGMENT_TO_NEWSRECORDFRAGMENT) != null)
-        {
-        	OpenMainScreen();
-        	
-        	return;
-        }
-        
-        if ( getSupportFragmentManager().findFragmentByTag(TAG_FROM_NEWSLISTFRAGMENT_TO_NEWSRECORDFRAGMENT) != null)
-        {
-        	OpenNewsScreen();
-        	
-        	return;
-        }
-        
-        super.onBackPressed();
-    	
-    	
-    	/*
-    	 * AddToBackStack is falling. Here is workaround
-        if(getSupportFragmentManager().getBackStackEntryCount() != 0) {
-        	getSupportFragmentManager().popBackStack();
-        } else {
-            super.onBackPressed();
-        }*/
-    }   
-   
-    @Override
-    protected void onResume() {
-    	//Xperimental -- opening and closing leads to fail
-    	//newsDataSource.open();
-      super.onResume();
-    }
-
-    @Override
-    protected void onPause() {
-    	//Xperimental -- opening and closing leads to fail
-    	//newsDataSource.close();
-      super.onPause();
-    }
-
 
 }

android/src/fishrungames/bashgid/MainPageFragment.java

@@ -47,7 +47,7 @@ public class MainPageFragment extends Fragment implements NewsUpdatedCallbackInt
 	ListView listView;
 	View header;
 	
-	NewsManager.RemoveCallbackInterface downloadNewsCanceller;
+	NewsManager.RemoveCallbackInterface downloadNewsCanceller = null;
 
 	@Override
 	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
@@ -84,7 +84,11 @@ public class MainPageFragment extends Fragment implements NewsUpdatedCallbackInt
     @Override
 	public void onDestroyView()
 	{
-		downloadNewsCanceller.RemoveCallback();
+    	if (downloadNewsCanceller != null)
+    	{
+    		downloadNewsCanceller.RemoveCallback();
+    		downloadNewsCanceller = null;
+    	}
 		super.onDestroyView();
 	}
     

android/src/fishrungames/bashgid/NavigationDrawerFragment.java

@@ -3,9 +3,11 @@ package fishrungames.bashgid;
 
 import android.support.v7.app.ActionBarActivity;
 import android.app.Activity;
+import android.app.SearchManager;
 import android.support.v7.app.ActionBar;
 import android.support.v4.app.Fragment;
 import android.support.v7.app.ActionBarDrawerToggle;
+import android.support.v7.widget.SearchView;
 import android.support.v4.view.GravityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.content.Context;
@@ -258,10 +260,11 @@ public class NavigationDrawerFragment extends Fragment {
         // showGlobalContextActionBar, which controls the top-left area of the action bar.
         
     	
-    	inflater.inflate(R.menu.global, menu);
+    	//inflater.inflate(R.menu.global, menu);
     	showGlobalContextActionBar();
     	
         super.onCreateOptionsMenu(menu, inflater);
+        
     }
 
     @Override
@@ -272,6 +275,11 @@ public class NavigationDrawerFragment extends Fragment {
             return true;
         }
         
+        if (item.getItemId() == R.id.action_search) {
+
+            return true;
+        }
+
         if (item.getItemId() == R.id.action_settings) {
             Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT).show();
             return true;

android/src/fishrungames/bashgid/NewsListFragment.java

@@ -31,7 +31,7 @@ public class NewsListFragment extends Fragment implements NewsUpdatedCallbackInt
 	
 	ArrayList<NewsRecord> newsRecordArr;
 	
-	NewsManager.RemoveCallbackInterface downloadNewsCanceller;
+	NewsManager.RemoveCallbackInterface downloadNewsCanceller = null;
 	
 	@Override
 	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
@@ -57,7 +57,11 @@ public class NewsListFragment extends Fragment implements NewsUpdatedCallbackInt
 	@Override
 	public void onDestroyView()
 	{
-		downloadNewsCanceller.RemoveCallback();
+		if (downloadNewsCanceller != null)
+		{
+			downloadNewsCanceller.RemoveCallback();
+			downloadNewsCanceller = null;
+		}
 		super.onDestroyView();
 	}
 	

android/src/fishrungames/bashgid/SettingsFragment.java

@@ -0,0 +1,22 @@
+package fishrungames.bashgid;
+
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+
+public class SettingsFragment extends Fragment
+{
+
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+		
+		View rootView = inflater.inflate(R.layout.fragment_settings_page, container, false);
+		
+
+		return rootView;
+	}
+}

android/src/fishrungames/bashgid/core/ImageManager.java

@@ -5,6 +5,8 @@ import java.io.FileOutputStream;
 import java.io.InputStream;
 import java.net.URL;
 import java.util.HashMap;
+import java.util.HashSet;
+import java.util.concurrent.Semaphore;
 
 import fishrungames.bashgid.MainActivity;
 import fishrungames.bashgid.R;
@@ -20,6 +22,10 @@ public class ImageManager {
 
 	static ImageManager instance = null;
 	
+	private volatile Semaphore downloadingFileNameSetMutex = new Semaphore(1, true);
+	private volatile HashSet<String> downloadingFileNameSet = new HashSet<String>();
+	
+	
 	public static ImageManager getInstance()
 	{
 		if (instance == null)
@@ -43,6 +49,8 @@ public class ImageManager {
 	
 	public void ApplyImageToImageView(ImageView imageView, String imageId)
 	{
+		//Xperimental -- Should be called only in main thread
+		
 		if (imageId.startsWith("R.drawable."))
 		{
 			Integer resourceId = PredefinedImageId.get(imageId);
@@ -64,14 +72,40 @@ public class ImageManager {
 			
 			if (f.exists())
 			{
-				Bitmap bitmap = BitmapFactory.decodeFile( MainActivity.getInstance().getFileStreamPath(fileName).getAbsolutePath());
 				
-				imageView.setImageBitmap(bitmap);
+				boolean fileIsBusy = false;
+				
+				
+				try
+				{
+					downloadingFileNameSetMutex.acquire();
+					try
+					{					
+						fileIsBusy = downloadingFileNameSet.contains(fileName);
+					} finally
+					{
+						downloadingFileNameSetMutex.release();
+					}
+				} catch (InterruptedException ie)
+				{
+					Log.e("Error in ApplyImageToImageView", "Error in ApplyImageToImageView");
+				}
+				
+				
+				if (!fileIsBusy)
+				{
+									
+					Bitmap bitmap = BitmapFactory.decodeFile( MainActivity.getInstance().getFileStreamPath(fileName).getAbsolutePath());
+				
+					imageView.setImageBitmap(bitmap);
+				
+				}
+				
+				
+				
 			}
 			else
 			{
-				Log.e("Error: ", "Image requested but not downloaded: " + imageId);
-
 				imageView.setImageResource(R.drawable.transparent);
 			}
 		}
@@ -97,26 +131,76 @@ public class ImageManager {
 			return;
 		}
 		
-		try {
+		boolean fileIsBusy = false;
-	        InputStream is = (InputStream) new URL(imageUrl).getContent();
 		
-	        FileOutputStream out = null;
 		
-	        out = MainActivity.getInstance().openFileOutput(fileName, Context.MODE_PRIVATE);
+		try
+		{
+			downloadingFileNameSetMutex.acquire();
+			try
+			{			
+				if (downloadingFileNameSet.contains(fileIsBusy))
+				{
+					fileIsBusy = true;
+				}
+				else
+				{
+					downloadingFileNameSet.add(fileName);
+				}
+			} finally
+			{
+				downloadingFileNameSetMutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error in DownloadImageIfNeeded", "Error in DownloadImageIfNeeded");
+		}
 		
-	        byte [] buf = new byte[1024];
+		if (!fileIsBusy)
+		{
 		
-	        int numRead;
+			try {
+		        InputStream is = (InputStream) new URL(imageUrl).getContent();
 		        
-	        while ( (numRead = is.read(buf) ) >= 0) {
+		        FileOutputStream out = null;
-	        	out.write(buf, 0, numRead);
-	        }
 		        
-	        out.close();
+		        out = MainActivity.getInstance().openFileOutput(fileName, Context.MODE_PRIVATE);
 		        
-		} catch (Exception e) {
+		        byte [] buf = new byte[1024];
-	        e.printStackTrace();
+		         
-	    }
+		        int numRead;
+		        
+		        while ( (numRead = is.read(buf) ) >= 0) {
+		        	out.write(buf, 0, numRead);
+		        }
+		        
+		        out.close();    
+		   
+	
+			} catch (Exception e) {
+		        e.printStackTrace();
+		    }
+			
+			
+			try
+			{
+				downloadingFileNameSetMutex.acquire();
+				try
+				{			
+
+					downloadingFileNameSet.remove(fileName);
+
+				} finally
+				{
+					downloadingFileNameSetMutex.release();
+				}
+			} catch (InterruptedException ie)
+			{
+				Log.e("Error in DownloadImageIfNeeded", "Error in DownloadImageIfNeeded");
+			}
+		
+		
+		}
 	}
 	
 	public String GetImageLocalUrl(String imageUrl)

android/src/fishrungames/bashgid/core/NewsManager.java

@@ -4,16 +4,38 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.Date;
+import java.util.concurrent.Semaphore;
+
+import android.util.Log;
 
 
 import fishrungames.bashgid.MainActivity;
+import fishrungames.bashgid.core.db.BashgidSqliteHelper;
 
 public class NewsManager {
 
+	private static final String [] urlArr = {
+		"https://www.bashkortostan.ru/presscenter/news/rss/",
+		"http://www.bashedu.ru/rss.xml",
+		"http://www.bashinform.ru/rss/all.xml",
+		"http://www.minkult-rb.ru/news/rss/",
+		"http://02.mvd.ru/news/rss/"
+		}; 
+	
 	private static NewsManager instance = null;
 
-	//Xperimental -- need do something with this. Change to semaphore?
+	private static volatile boolean SynchronizationInProcess = false; //Not strict, so don't need mutex
-	public static volatile boolean SynchronizationInProcess = false;
+	
+	private volatile Semaphore newsRecordMutex = new Semaphore(1, true);
+	private ArrayList<NewsRecord> newsRecord = new ArrayList<NewsRecord>();
+	
+	
+	
+	public static boolean CanCallSynchronization()
+	{
+		return SynchronizationInProcess;
+	}
+	
 	
 	
 	public static NewsManager GetInstance()
@@ -60,16 +82,18 @@ public class NewsManager {
 		}
 	}
 	
-	ArrayList<NewsRecord> newsRecord = new ArrayList<NewsRecord>();
 
 	public RemoveCallbackInterface DownloadNews(NewsUpdatedCallbackInterface callback)
 	{
+		DownloadNewsRunnable downloadNewsRunnable = null;
+		if (CanCallSynchronization())
+		{
+			downloadNewsRunnable = new DownloadNewsRunnable(callback);
 			
-		DownloadNewsRunnable downloadNewsRunnable = new DownloadNewsRunnable(callback);
+			Thread thread = new Thread(downloadNewsRunnable);
 			
-		Thread thread = new Thread(downloadNewsRunnable);
+			thread.start();
-		
+		}
-		thread.start();
 		
 		return downloadNewsRunnable;
 	}
@@ -77,37 +101,59 @@ public class NewsManager {
 	class DownloadNewsRunnable implements Runnable, RemoveCallbackInterface
 	{
 		
-		NewsUpdatedCallbackInterface callback;
+		private volatile Semaphore callbackMutex = new Semaphore(1, true);
+		NewsUpdatedCallbackInterface callback = null;
 		
 		public DownloadNewsRunnable(NewsUpdatedCallbackInterface callback)
 		{
-			this.callback = callback;
+			try
+			{
+				callbackMutex.acquire();
+				try
+				{		
+				
+					this.callback = callback;	
+					
+				} finally
+				{
+					callbackMutex.release();
+				}
+			} catch (InterruptedException ie)
+			{
+				Log.e("Error in DownloadNewsRunnable", "Error in DownloadNewsRunnable");
+			}
+			
 		}
 		
 		@Override
 		public void RemoveCallback()
 		{
-			callback = null;
+			
+			try
+			{
+				callbackMutex.acquire();
+				try
+				{		
+				
+					callback = null;
+					
+				} finally
+				{
+					callbackMutex.release();
+				}
+			} catch (InterruptedException ie)
+			{
+				Log.e("Error in DownloadNewsRunnable", "Error in DownloadNewsRunnable");
+			}
 		}
 		
 		@Override
 		public void run()
 		{
-			if (SynchronizationInProcess)
+
-			{
-				return;
-			}
 	
 			SynchronizationInProcess = true;	
 
-			final String [] urlArr = {
-					"https://www.bashkortostan.ru/presscenter/news/rss/",
-					"http://www.bashedu.ru/rss.xml",
-					"http://www.bashinform.ru/rss/all.xml",
-					"http://www.minkult-rb.ru/news/rss/",
-					"http://02.mvd.ru/news/rss/"
-					
-					}; 
 						
 			ArrayList<NewsRecord> localNewsRecord = MainActivity.getInstance().newsDataSource.getNews();
 			
@@ -118,29 +164,60 @@ public class NewsManager {
 				
 				LoadNewsAndImagesFromRss2(urlArr[i], localNewsRecord, imageToDownloadList);
 				
-				Collections.sort(localNewsRecord, new NewsSortComparator());
-				
-				//NewsSortComparator
-				
-				//Xperimental -- need mutex right here
-				newsRecord = localNewsRecord;
-				
-				MainActivity.getInstance().newsDataSource.replaceNews(newsRecord);
-				
-				//Xperimental -- need mutex here, too
-				if (callback != null)
-				{
-					callback.OnNewsUpdated();
-				}
-			
 			}
 			
+			Collections.sort(localNewsRecord, new NewsSortComparator());
+			
+
+			try
+			{
+				newsRecordMutex.acquire();
+				try
+				{		
+					
+					newsRecord = localNewsRecord;
+					
+					MainActivity.getInstance().newsDataSource.replaceNews(newsRecord);
+					
+				} finally
+				{
+					newsRecordMutex.release();
+				}
+			} catch (InterruptedException ie)
+			{
+				Log.e("Error in DownloadNewsRunnable", "Error in DownloadNewsRunnable");
+			}
+			
+						
+			try
+			{
+				callbackMutex.acquire();
+				try
+				{		
+				
+					if (callback != null)
+					{
+						callback.OnNewsUpdated();
+					}
+					
+				} finally
+				{
+					callbackMutex.release();
+				}
+			} catch (InterruptedException ie)
+			{
+				Log.e("Error in DownloadNewsRunnable", "Error in DownloadNewsRunnable");
+			}
+			
+			
 			for (String imageToDownload : imageToDownloadList)
 			{
 				ImageManager.getInstance().DownloadImageIfNeeded(imageToDownload);
 			}
 			
+
 			SynchronizationInProcess = false;	
+
 		}
 	}
 	
@@ -157,14 +234,46 @@ public class NewsManager {
 	
 	public NewsManager()
 	{
-		newsRecord = MainActivity.getInstance().newsDataSource.getNews();
+		try
+		{
+			newsRecordMutex.acquire();
+			try
+			{		
+				newsRecord = MainActivity.getInstance().newsDataSource.getNews();
+				
+			} finally
+			{
+				newsRecordMutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error in NewsManager constructor", "Error in NewsManager constructor");
+		}
 		
 	}
 	
 	
 	public ArrayList<NewsRecord> getNews()
 	{
-		return newsRecord;
+		ArrayList<NewsRecord> result = new ArrayList<NewsRecord>();
+
+		try
+		{
+			newsRecordMutex.acquire();
+			try
+			{		
+				result.addAll(newsRecord);
+				
+			} finally
+			{
+				newsRecordMutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error in NewsManager constructor", "Error in NewsManager constructor");
+		}
+		
+		return result;
 	}
 	
 	

android/src/fishrungames/bashgid/core/XmlProcessor.java

@@ -7,6 +7,7 @@ import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 
+import org.w3c.dom.DOMException;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
@@ -36,6 +37,11 @@ public class XmlProcessor
 		{
 			Log.e("Error: ", e.getMessage());
 			return null;
+		} catch (DOMException e)
+		{
+			//Xperimental -- need to learn more about this exception
+			Log.e("Error: ", e.getMessage());
+			return null;
 		} catch (SAXException e)
 		{
 			Log.e("Error: ", e.getMessage());

android/src/fishrungames/bashgid/core/db/NewsDataSource.java

@@ -4,6 +4,7 @@ import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Locale;
+import java.util.concurrent.Semaphore;
 
 import fishrungames.bashgid.core.NewsManager;
 
@@ -12,6 +13,7 @@ import android.content.Context;
 import android.database.Cursor;
 import android.database.SQLException;
 import android.database.sqlite.SQLiteDatabase;
+import android.util.Log;
 
 public class NewsDataSource
 {
@@ -19,25 +21,82 @@ public class NewsDataSource
 	//Xperimental -- move somewhere
 	public static final SimpleDateFormat iso8601Format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
 
-	private SQLiteDatabase database;
+	private SQLiteDatabase database = null;
 
-	private BashgidSqliteHelper dbHelper;
+	private BashgidSqliteHelper dbHelper = null;
 
 	private String[] allColumns = { BashgidSqliteHelper.COLUMN_ID, BashgidSqliteHelper.COLUMN_TITLE, BashgidSqliteHelper.COLUMN_DESCRIPTION,
 			BashgidSqliteHelper.COLUMN_IMAGE_ID, BashgidSqliteHelper.COLUMN_PUBDATE };
 	
-	public NewsDataSource(Context context) {
+	
-		dbHelper = new BashgidSqliteHelper(context);
+	private final Semaphore mutex = new Semaphore(1, true);
+
+	public NewsDataSource(Context context)
+	{
+		
+		try
+		{
+			mutex.acquire();
+			try
+			{
+				
+				dbHelper = new BashgidSqliteHelper(context);
+				
+			} finally
+			{
+				mutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error when creating BashgidSqliteHelper", "Error when creating BashgidSqliteHelper");
+		}
 	}
 
 	public void open() throws SQLException
 	{
-		database = dbHelper.getWritableDatabase();
+		try
+		{
+			mutex.acquire();
+			try
+			{
+				
+				database = dbHelper.getWritableDatabase();
+				
+			} finally
+			{
+				mutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error when opening NewsDataSource", "Error when opening NewsDataSource");
+			
+			database = null;
+		}
+		
 	}
 
 	public void close()
 	{
-		dbHelper.close();
+		try
+		{
+			mutex.acquire();
+			try
+			{
+				if (dbHelper != null)
+				{
+					dbHelper.close();
+					database = null;
+				}
+				
+			} finally
+			{
+				mutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error when closing NewsDataSource", "Error when closing NewsDataSource");
+		}
+		
 	}
 
 	public void createNewsRecord(NewsManager.NewsRecord newsRecord)
@@ -50,14 +109,52 @@ public class NewsDataSource
 		values.put(BashgidSqliteHelper.COLUMN_IMAGE_ID, newsRecord.imageId);
 		values.put(BashgidSqliteHelper.COLUMN_PUBDATE, iso8601Format.format(newsRecord.pubDate));
 		
-		database.insert(BashgidSqliteHelper.TABLE_NEWS, null, values);
 		
+		
+		try
+		{
+			mutex.acquire();
+			try
+			{
+				
+				if (database != null)
+				{
+					database.insert(BashgidSqliteHelper.TABLE_NEWS, null, values);
+				}
+				
+			} finally
+			{
+				mutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error when calling createNewsRecord", "Error when calling createNewsRecord");
+		}	
 	}
 
 	public void replaceNews(ArrayList<NewsManager.NewsRecord> newsRecordArr)
 	{
 
-		database.delete(BashgidSqliteHelper.TABLE_NEWS, null, null);
+		try
+		{
+			mutex.acquire();
+			try
+			{
+				
+				if (database != null)
+				{
+					database.delete(BashgidSqliteHelper.TABLE_NEWS, null, null);
+				}
+				
+			} finally
+			{
+				mutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error when calling replaceNews", "Error when calling replaceNews");
+		}
+		
 
 		for (NewsManager.NewsRecord newsRecord : newsRecordArr)
 		{
@@ -70,18 +167,39 @@ public class NewsDataSource
 	{
 
 		ArrayList<NewsManager.NewsRecord> newsRecordArr = new ArrayList<NewsManager.NewsRecord>();
-
+/*
-		Cursor cursor = database.query(BashgidSqliteHelper.TABLE_NEWS, allColumns, null, null, null, null, null);
+		try
-
-		cursor.moveToFirst();
-		while (!cursor.isAfterLast())
 		{
-			NewsManager.NewsRecord newsRecord = cursorToNewsRecord(cursor);
+			mutex.acquire();
-			newsRecordArr.add(newsRecord);
+			try
-			cursor.moveToNext();
+			{
+*/
+				if (database != null)
+				{
+					Cursor cursor = database.query(BashgidSqliteHelper.TABLE_NEWS, allColumns, null, null, null, null, null);
+
+					cursor.moveToFirst();
+					
+					while (!cursor.isAfterLast())
+					{
+						NewsManager.NewsRecord newsRecord = cursorToNewsRecord(cursor);
+						newsRecordArr.add(newsRecord);
+						cursor.moveToNext();
+					}
+
+					cursor.close();
+				}
+
+				/*
+			} finally
+			{
+				mutex.release();
+			}
+		} catch (InterruptedException ie)
+		{
+			Log.e("Error when calling replaceNews", "Error when calling replaceNews");
 		}
-		// make sure to close the cursor
+		*/
-		cursor.close();
 		return newsRecordArr;
 	}