About section in preferences dialog

assets/resources/application/en.xml

@@ -651,6 +651,19 @@
 					<node name="summaryOff" value="Do not show"/>
 				</node>
 			</node>
+			<node name="about" value="About FBReader">
+				<node name="summary" value="Version info, contacts"/>
+				<node name="version" value="Version"/>
+				<node name="site" value="Visit our website">
+					<node name="url" value="http://www.fbreader.org/"/>
+				</node>
+				<node name="email" value="Send us an e-mail">
+					<node name="url" value="mailto:contact@geometerplus.com"/>
+				</node>
+				<node name="twitter" value="Follow us at twitter">
+					<node name="url" value="http://twitter.com/fbreader"/>
+				</node>
+			</node>
 		</node>
 		<node name="OptionsDialog">
 			<node name="tab">

assets/resources/application/ru.xml

@@ -662,6 +662,19 @@
 					<node name="summaryOff" value="Не показывать"/>
 				</node>
 			</node>
+			<node name="about" value="О программе FBReader">
+				<node name="summary" value="Версия, контакты"/>
+				<node name="version" value="Версия"/>
+				<node name="site" value="Наш веб-сайт">
+					<node name="url" value="http://www.fbreader.ru/"/>
+				</node>
+				<node name="email" value="Отправьте нам письмо">
+					<node name="url" value="mailto:contact@geometerplus.com"/>
+				</node>
+				<node name="twitter" value="Читайте нас в твиттере">
+					<node name="url" value="http://twitter.com/fbreader_ru"/>
+				</node>
+			</node>
 		</node>
 		<node name="OptionsDialog">
 			<node name="tab">

src/org/geometerplus/android/fbreader/preferences/PreferenceActivity.java

@@ -429,5 +429,15 @@ public class PreferenceActivity extends ZLPreferenceActivity {
 
 		final Screen tipsScreen = createPreferenceScreen("tips");
 		tipsScreen.addOption(TipsManager.Instance().ShowTipsOption, "showTips");
+
+		final Screen aboutScreen = createPreferenceScreen("about");
+		aboutScreen.addPreference(new InfoPreference(
+			this,
+			aboutScreen.Resource.getResource("version").getValue(),
+			androidLibrary.getFullVersionName()
+		));
+		aboutScreen.addPreference(new UrlPreference(this, aboutScreen.Resource, "site"));
+		aboutScreen.addPreference(new UrlPreference(this, aboutScreen.Resource, "email"));
+		aboutScreen.addPreference(new UrlPreference(this, aboutScreen.Resource, "twitter"));
 	}
 }

src/org/geometerplus/android/fbreader/preferences/UrlPreference.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2009-2012 Geometer Plus <contact@geometerplus.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+package org.geometerplus.android.fbreader.preferences;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.preference.Preference;
+
+import org.geometerplus.zlibrary.core.resources.ZLResource;
+
+class UrlPreference extends Preference implements Preference.OnPreferenceClickListener {
+	private final String myUrl;
+
+	UrlPreference(Context context, ZLResource resource, String resourceKey) {
+		super(context);
+		resource = resource.getResource(resourceKey);
+		myUrl = resource.getResource("url").getValue();
+		setTitle(resource.getValue());
+		setSummary(myUrl);
+		setOnPreferenceClickListener(this);
+	}
+
+	public boolean onPreferenceClick(Preference preference) {
+		try {
+			getContext().startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(myUrl)));
+		} catch (Throwable t) {
+			t.printStackTrace();
+		}
+		return true;
+	}
+}

src/org/geometerplus/zlibrary/core/library/ZLibrary.java

@@ -48,6 +48,7 @@ public abstract class ZLibrary {
 	abstract public ZLResourceFile createResourceFile(ZLResourceFile parent, String name);
 
 	abstract public String getVersionName();
+	abstract public String getFullVersionName();
 	abstract public String getCurrentTimeString();
 	abstract public void setScreenBrightness(int percent);
 	abstract public int getScreenBrightness();

src/org/geometerplus/zlibrary/ui/android/library/ZLAndroidLibrary.java

@@ -26,6 +26,7 @@ import java.lang.reflect.Field;
 import android.app.Application;
 import android.content.Context;
 import android.content.pm.ActivityInfo;
+import android.content.pm.PackageInfo;
 import android.content.res.AssetFileDescriptor;
 import android.os.Build;
 import android.telephony.TelephonyManager;
@@ -114,7 +115,20 @@ public final class ZLAndroidLibrary extends ZLibrary {
 	@Override
 	public String getVersionName() {
 		try {
-			return myApplication.getPackageManager().getPackageInfo(myApplication.getPackageName(), 0).versionName;
+			final PackageInfo info =
+				myApplication.getPackageManager().getPackageInfo(myApplication.getPackageName(), 0);
+			return info.versionName;
+		} catch (Exception e) {
+			return "";
+		}
+	}
+
+	@Override
+	public String getFullVersionName() {
+		try {
+			final PackageInfo info =
+				myApplication.getPackageManager().getPackageInfo(myApplication.getPackageName(), 0);
+			return info.versionName + " (" + info.versionCode + ")";
 		} catch (Exception e) {
 			return "";
 		}