diff --git a/app/src/main/java/com/luca0n/joguitos/pluck/activities/MainActivity.java b/app/src/main/java/com/luca0n/joguitos/pluck/activities/MainActivity.java
index a29015a..0adeb1f 100644
--- a/app/src/main/java/com/luca0n/joguitos/pluck/activities/MainActivity.java
+++ b/app/src/main/java/com/luca0n/joguitos/pluck/activities/MainActivity.java
@@ -24,67 +24,92 @@ Contact us at <joguitos+pluck@luca0n.com>.
 package com.luca0n.joguitos.pluck.activities;
 
 import android.content.Intent;
+import android.os.Build;
 import android.os.Bundle;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.Spinner;
+import androidx.appcompat.app.AlertDialog;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import com.luca0n.joguitos.pluck.R;
+import com.luca0n.joguitos.pluck.trivia.TriviaSource;
 import com.luca0n.joguitos.pluck.trivia.TriviaCategory;
 import com.luca0n.joguitos.pluck.trivia.TriviaDifficulty;
 import com.luca0n.joguitos.pluck.trivia.TriviaQuery;
 
 public class MainActivity extends BaseActivity {
 
-    @BindView(R.id.button_play)
-    Button buttonPlay;
-    @BindView(R.id.spinner_number)
-    Spinner spinnerNumber;
-    @BindView(R.id.spinner_category)
-    Spinner spinnerCategory;
-    @BindView(R.id.spinner_difficulty)
-    Spinner spinnerDifficulty;
+	@BindView(R.id.button_play)
+	Button buttonPlay;
+	@BindView(R.id.spinner_source)
+	Spinner spinnerSource;
+	@BindView(R.id.spinner_number)
+	Spinner spinnerNumber;
+	@BindView(R.id.spinner_category)
+	Spinner spinnerCategory;
+	@BindView(R.id.spinner_difficulty)
+	Spinner spinnerDifficulty;
 
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-        ButterKnife.bind(this);
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_main);
+		ButterKnife.bind(this);
 
-        buttonPlay.setOnClickListener(v -> {
-            int amount = (int) spinnerNumber.getSelectedItem();
-            TriviaCategory category = (TriviaCategory) spinnerCategory.getSelectedItem();
-            TriviaDifficulty difficulty = (TriviaDifficulty) spinnerDifficulty.getSelectedItem();
+		buttonPlay.setOnClickListener(v -> {
+			int sourcePos = spinnerSource.getSelectedItemPosition();
+			if (TriviaSource.values()[sourcePos] ==  TriviaSource.FILE){
+				// Check the Android version.
+				if (Build.VERSION.SDK_INT >= 19){
+					// TODO: Show the open document dialog and read the trivia file.
+					return;
+				} else {
+					// Unsupported version.
+					new AlertDialog.Builder(this)
+					.setIcon(android.R.drawable.ic_dialog_alert)
+					.setTitle(R.string.error)
+					.setMessage(R.string.error_source_file_android_version_unsupported)
+					.setPositiveButton(android.R.string.ok, null)
+					.show();	
+				}
+				return;
+			}
+			int amount = (int) spinnerNumber.getSelectedItem();
+			TriviaCategory category = (TriviaCategory) spinnerCategory.getSelectedItem();
+			TriviaDifficulty difficulty = (TriviaDifficulty) spinnerDifficulty.getSelectedItem();
 
-            TriviaQuery query = new TriviaQuery.Builder(amount)
-                    .category(category)
-                    .difficulty(difficulty)
-                    .build();
+			TriviaQuery query = new TriviaQuery.Builder(amount)
+				.category(category)
+				.difficulty(difficulty)
+				.build();
 
-            Intent intent = new Intent(getApplicationContext(), TriviaGameActivity.class);
-            intent.putExtra(TriviaGameActivity.EXTRA_TRIVIA_QUERY, query);
-            startActivity(intent);
-        });
+			Intent intent = new Intent(getApplicationContext(), TriviaGameActivity.class);
+			intent.putExtra(TriviaGameActivity.EXTRA_TRIVIA_QUERY, query);
+			startActivity(intent);
+		});
 
+		Integer[] numbers = new Integer[50];
+		for (int i = 0; i < 50; ) {
+			numbers[i] = ++i;
+		}
+		spinnerSource.setAdapter(
+				new ArrayAdapter<>(
+					this, android.R.layout.simple_list_item_1, TriviaSource.values())
+				);
+		spinnerNumber.setAdapter(
+				new ArrayAdapter<>(
+					this, android.R.layout.simple_list_item_1, numbers)
+				);
+		spinnerNumber.setSelection(9);
 
-        Integer[] numbers = new Integer[50];
-        for (int i = 0; i < 50; ) {
-            numbers[i] = ++i;
-        }
-        spinnerNumber.setAdapter(
-                new ArrayAdapter<>(
-                        this, android.R.layout.simple_list_item_1, numbers)
-        );
-        spinnerNumber.setSelection(9);
+		spinnerCategory.setAdapter(
+				new ArrayAdapter<>(
+					this, android.R.layout.simple_list_item_1, TriviaCategory.values()));
 
-        spinnerCategory.setAdapter(
-                new ArrayAdapter<>(
-                        this, android.R.layout.simple_list_item_1, TriviaCategory.values()));
-
-        spinnerDifficulty.setAdapter(
-                new ArrayAdapter<>(
-                        this, android.R.layout.simple_list_item_1, TriviaDifficulty.values()));
-    }
+		spinnerDifficulty.setAdapter(
+				new ArrayAdapter<>(
+					this, android.R.layout.simple_list_item_1, TriviaDifficulty.values()));
+	}
 }
diff --git a/app/src/main/java/com/luca0n/joguitos/pluck/activities/TriviaGameActivity.java b/app/src/main/java/com/luca0n/joguitos/pluck/activities/TriviaGameActivity.java
index cece721..0167303 100644
--- a/app/src/main/java/com/luca0n/joguitos/pluck/activities/TriviaGameActivity.java
+++ b/app/src/main/java/com/luca0n/joguitos/pluck/activities/TriviaGameActivity.java
@@ -95,9 +95,23 @@ public class TriviaGameActivity extends BaseActivity
 
 			progressBar.setVisibility(View.VISIBLE);
 
-			DownloadTriviaQuestionsTask task = new DownloadTriviaQuestionsTask();
-			task.setReceiver(this);
-			task.execute(query);
+			// Gather information about the trivia location.
+			/*String triviaLocation;
+
+			switch (triviaLocation){
+				case "GET_FROM_URL":*/
+					DownloadTriviaQuestionsTask task = new DownloadTriviaQuestionsTask();
+					task.setReceiver(this);
+					task.execute(query);/*
+					break;
+				case "GET_FROM_FILE":
+
+					break;
+				default:
+					// Unknown specified trivia location.
+					// TODO: Show error message to the user about this internal error.
+					break;
+			}*/
 		}
 	}
 
diff --git a/app/src/main/java/com/luca0n/joguitos/pluck/trivia/TriviaSource.java b/app/src/main/java/com/luca0n/joguitos/pluck/trivia/TriviaSource.java
new file mode 100644
index 0000000..7a09cbb
--- /dev/null
+++ b/app/src/main/java/com/luca0n/joguitos/pluck/trivia/TriviaSource.java
@@ -0,0 +1,66 @@
+/*
+Pluck: an open source trivia game for Android
+
+Copyright (C) 2021 Joguitos do luca0N!
+
+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 3 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, see <https://www.gnu.org/licenses/>.
+
+This game is a fork of LibreTrivia, and its source code is available at
+<https://github.com/tryton-vanmeer/LibreTrivia>.
+
+Contact us at <joguitos+pluck@luca0n.com>.
+*/
+
+package com.luca0n.joguitos.pluck.trivia;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.luca0n.joguitos.pluck.PluckApplication;
+import com.luca0n.joguitos.pluck.R;
+
+public enum TriviaSource {
+    SERVER("server", R.string.source_server),
+    FILE("file", R.string.source_file);
+
+    // Name of source
+    private final String name;
+    // Display name of the source
+    private final int displayName;
+
+    private static final Map<String, TriviaSource> lookup = new HashMap<>();
+
+    static {
+        for (TriviaSource source : TriviaSource.values()) {
+            lookup.put(source.getName(), source);
+        }
+    }
+
+    TriviaSource(String name, int displayName) {
+        this.name = name;
+        this.displayName = displayName;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public static TriviaSource get(String name) {
+        return lookup.get(name);
+    }
+
+    @Override
+    public String toString() {
+        return PluckApplication.getAppContext().getResources().getString(this.displayName);
+    }
+}
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f726a49..3ac5954 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -61,6 +61,10 @@ Contact us at <joguitos+pluck@luca0n.com>.
     <string name="question_type_multiple">Multiple Choice</string>
     <string name="question_type_boolean">True / False</string>
 
+		<!-- Source Names -->
+		<string name="source_server">Server</string>
+		<string name="source_file">File</string>
+
     <!-- UI -->
     <string name="ui_settings">Settings</string>
     <string name="ui_about">About</string>
@@ -80,13 +84,17 @@ Contact us at <joguitos+pluck@luca0n.com>.
     <string name="ui_results_correct">Correct Answers</string>
     <string name="ui_results_wrong">Wrong Answers</string>
     <string name="ui_results_total">Total Questions</string>
-    <string name="ui_return_to_menu">Return To Menu</string>
+		<string name="ui_return_to_menu">Return To Menu</string>
+		<string name="ui_source">Source</string>
+		<string name="ui_source_about">This value specifies where the game should retrieve trivia data. By default, the game gathers trivia data from a server, but you can load trivia files with the "File" source option.</string>
 
-    <!-- Error Strings -->
+		<!-- Error Strings -->
+		<string name="error">Error</string>
 		<string name="error_network"><b>Network error!</b>\n\nCould not connect to a network. Check if your custom server address is correct. If 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>\n\nWas not able to find trivia questions that satisfied all options.</string>
 		<string name="error_server_response_invalid"><b>Server response error!</b>\n\nCould not parse the server response. The server response may be in a unsupported version. If you are using a custom server, make sure the server address points to a valid address and then try again.</string>
 		<string name="error_unknown"><b>An unknown error occurred!</b></string>
+		<string name="error_source_file_android_version_unsupported">Trivia files are not supported in this version of Android.</string>
 
     <string name="title_activity_settings">Settings</string>
 
@@ -98,6 +106,6 @@ Contact us at <joguitos+pluck@luca0n.com>.
 		<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 (recommended) or a Tor daemon with a SOCKS5 proxy listening on port 9050.</string>
-		<string name="pref_network_server_title">Server address</string>
-		<string name="pref_network_server_summary">Specifies the server location used by the game to fetch questions. Leave empty to use the default server.</string>
+		<string name="pref_network_server_title">Server Address</string>
+		<string name="pref_network_server_summary">Specifies the server location used by the game to fetch questions when using a server as the trivia source. Leave this setting empty to use the default server.</string>
 </resources>