Added preferences activity

app/src/main/AndroidManifest.xml

@@ -31,6 +31,9 @@
             android:label="@string/title_activity_intro"
             android:theme="@style/Theme.Intro">
         </activity>
+        <activity android:name=".PreferencesActivity"
+                  >
+        </activity>
     </application>
 
 </manifest>

app/src/main/java/me/impy/aegis/MainActivity.java

@@ -54,7 +54,6 @@ public class MainActivity extends AppCompatActivity  {
         setContentView(R.layout.activity_main);
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
-        //AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
 
         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
         fab.setOnClickListener(new View.OnClickListener() {
@@ -163,6 +162,10 @@ public class MainActivity extends AppCompatActivity  {
 
         //noinspection SimplifiableIfStatement
         if (id == R.id.action_settings) {
+
+            Intent preferencesActivity = new Intent(this, PreferencesActivity.class);
+            startActivity(preferencesActivity);
+
             return true;
         }
 

app/src/main/java/me/impy/aegis/PreferencesActivity.java

@@ -0,0 +1,50 @@
+package me.impy.aegis;
+
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceManager;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.app.AppCompatDelegate;
+
+public class PreferencesActivity extends AppCompatActivity {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        SharedPreferences mySharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        if(mySharedPreferences.getBoolean("pref_night_mode", false))
+        {
+            setTheme(R.style.AppTheme_Dark);
+        } else
+        {
+            setTheme(R.style.AppTheme_Default);
+        }
+        getFragmentManager().beginTransaction().replace(android.R.id.content, new PreferencesFragment()).commit();
+
+    }
+    public static class PreferencesFragment extends PreferenceFragment {
+
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+
+            // Load the preferences from an XML resource
+            addPreferencesFromResource(R.xml.preferences);
+
+            Preference nightModePreference = findPreference("pref_night_mode");
+            nightModePreference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+                @Override
+                public boolean onPreferenceClick(Preference preference) {
+                    //AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
+                    Intent i = new Intent(getActivity(), MainActivity.class);
+                    //startActivity(i);
+                    return false;
+                }
+            });
+        }
+    }
+}

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

@@ -2,4 +2,6 @@
     <string name="app_name">Aegis</string>
     <string name="action_settings">Settings</string>
     <string name="title_activity_intro">IntroActivity</string>
+    <string name="settings">Preferences</string>
+    <string name="pref_night_mode">Night mode</string>
 </resources>