Added missing Tor preference res files

Based on #2.

app/src/main/java/com/luca0n/joguitos/pluck/activities/TriviaGameActivity.java

@@ -33,6 +33,7 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.view.View;
+import android.view.MenuItem;
 import android.widget.Button;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
@@ -40,6 +41,7 @@ import android.widget.TextView;
 
 import java.io.IOException;
 
+import androidx.appcompat.app.ActionBar;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentTransaction;
 import butterknife.BindView;
@@ -79,6 +81,10 @@ public class TriviaGameActivity extends BaseActivity
 		setContentView(R.layout.activity_trivia_game);
 		ButterKnife.bind(this);
 
+		ActionBar actionBar = getSupportActionBar();
+		if (actionBar != null)
+			actionBar.setDisplayHomeAsUpEnabled(true);
+
 		if (savedInstanceState != null) {
 			this.game = (TriviaGame) savedInstanceState.getSerializable(STATE_TRIVIA_GAME);
 		} else {
@@ -118,6 +124,17 @@ public class TriviaGameActivity extends BaseActivity
 		}
 	}
 
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case android.R.id.home:
+				finish();
+				return true;
+			default:
+				return super.onOptionsItemSelected(item);
+		}
+	}
+
 	public void onTriviaQuestionsDownloaded(String json) {
 		if (json == null) {
 			onNetworkError();

app/src/main/res/values/pref_keys.xml

@@ -25,4 +25,5 @@ Contact us at <joguitos+pluck@luca0n.com>.
 <resources>
     <string name="pref_category_sound">pref_key_category_sound</string>
 		<string name="pref_sound_answer">pref_sound_answer</string>
+		<string name="pref_network_tor">pref_network_tor</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -83,11 +83,15 @@ Contact us at <joguitos+pluck@luca0n.com>.
     <string name="ui_return_to_menu">Return To Menu</string>
 
     <!-- Error Strings -->
-    <string name="error_network"><b>Network error!</b>\n Could not connect to a network.</string>
+    <string name="error_network"><b>Network error!</b>\nCould not connect to a network.\n\nIf Tor is enabled in the game settings, check if Orbot is running and then try again.</string>
     <string name="error_no_trivia_results"><b>No trivia results!</b>\nWas not able to find trivia questions that satisfied all options.</string>
     <string name="title_activity_settings">Settings</string>
 
     <!-- Setting Strings-->
     <string name="pref_category_sound_title">Sound</string>
 		<string name="pref_sound_answer_title">Answer Sound Effect</string>
+
+		<string name="pref_category_network_title">Network</string>
+		<string name="pref_network_tor_title">Connect using Tor</string>
+		<string name="pref_network_tor_summary">Retrieves trivia data via the Tor network. Requires Orbot.</string>
 </resources>

app/src/main/res/xml/preferences.xml

@@ -34,5 +34,13 @@ Contact us at <joguitos+pluck@luca0n.com>.
             android:title="@string/pref_sound_answer_title" />
 
 		</PreferenceCategory>
+		<PreferenceCategory
+			android:title="@string/pref_category_network_title">
+			<CheckBoxPreference
+				android:defaultValue="false"
+				android:key="@string/pref_network_tor"
+				android:title="@string/pref_network_tor_title"
+				android:summary="@string/pref_network_tor_summary" />
+		</PreferenceCategory>
 
 </PreferenceScreen>