added app class to handle language settings

src/org/torproject/android/OrbotApp.java

@@ -0,0 +1,48 @@
+package org.torproject.android;
+
+import java.util.Locale;
+
+import android.app.Application;
+import android.content.SharedPreferences;
+import android.content.res.Configuration;
+import android.preference.PreferenceManager;
+
+public class OrbotApp extends Application implements TorConstants
+{
+
+	private Locale locale;
+	private final static String DEFAULT_LOCALE = "fa";
+	
+	@Override
+    public void onCreate() {
+        super.onCreate();
+        
+        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
+
+        Configuration config = getResources().getConfiguration();
+
+        String lang = settings.getString(PREF_DEFAULT_LOCALE, DEFAULT_LOCALE);
+        
+        if (! "".equals(lang) && ! config.locale.getLanguage().equals(lang))
+        {
+            locale = new Locale(lang);
+            Locale.setDefault(locale);
+            config.locale = locale;
+            getResources().updateConfiguration(config, getResources().getDisplayMetrics());
+        }
+        
+    }
+	
+    @Override
+    public void onConfigurationChanged(Configuration newConfig)
+    {
+        super.onConfigurationChanged(newConfig);
+
+        if (locale != null)
+        {
+            newConfig.locale = locale;
+            Locale.setDefault(locale);
+            getResources().updateConfiguration(newConfig, getResources().getDisplayMetrics());
+        }
+    }
+}