Add BaseActivity and BaseAppcompatActivity

app/src/main/java/fr/free/nrw/commons/AboutActivity.java

@@ -1,12 +1,11 @@
 package fr.free.nrw.commons;
 
-import android.app.Activity;
 import android.os.Bundle;
 import android.text.Html;
 import android.text.method.LinkMovementMethod;
 import android.widget.TextView;
 
-public class AboutActivity extends Activity {
+public class AboutActivity extends BaseActivity {
     private TextView versionText;
     private TextView licenseText;
     private TextView improveText;

app/src/main/java/fr/free/nrw/commons/BaseActivity.java

@@ -0,0 +1,19 @@
+package fr.free.nrw.commons;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+
+
+public class BaseActivity extends Activity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        //Check prefs on every activity starts
+        if (getSharedPreferences("prefs", Context.MODE_PRIVATE).getBoolean("theme", false)) {
+            setTheme(R.style.LightAppTheme);
+        }else {
+            setTheme(R.style.DarkAppTheme); //default
+        }
+        super.onCreate(savedInstanceState);
+    }
+}

app/src/main/java/fr/free/nrw/commons/BaseAppCompatActivity.java

@@ -0,0 +1,19 @@
+package fr.free.nrw.commons;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+
+
+public class BaseAppCompatActivity extends AppCompatActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        //Check prefs on every activity starts
+        if (getSharedPreferences("prefs", Context.MODE_PRIVATE).getBoolean("theme", false)) {
+            setTheme(R.style.LightAppTheme);
+        }else {
+            setTheme(R.style.DarkAppTheme); //default
+        }
+        super.onCreate(savedInstanceState);
+    }
+}

app/src/main/java/fr/free/nrw/commons/WelcomeActivity.java

@@ -1,6 +1,5 @@
 package fr.free.nrw.commons;
 
-import android.app.Activity;
 import android.os.Bundle;
 import android.support.v4.view.PagerAdapter;
 import android.support.v4.view.ViewPager;
@@ -10,7 +9,7 @@ import android.widget.Button;
 
 import com.viewpagerindicator.CirclePageIndicator;
 
-public class WelcomeActivity extends Activity {
+public class WelcomeActivity extends BaseActivity {
     static final int PAGE_WIKIPEDIA = 0,
             PAGE_DO_UPLOAD = 1,
             PAGE_DONT_UPLOAD = 2,

app/src/main/java/fr/free/nrw/commons/auth/AuthenticatedActivity.java

@@ -15,10 +15,11 @@ import android.support.v7.app.AppCompatActivity;
 
 import java.io.IOException;
 
+import fr.free.nrw.commons.BaseAppCompatActivity;
 import fr.free.nrw.commons.CommonsApplication;
 import fr.free.nrw.commons.Utils;
 
-public abstract class AuthenticatedActivity extends AppCompatActivity {
+public abstract class AuthenticatedActivity extends BaseAppCompatActivity {
 
     String accountType;
     CommonsApplication app;

app/src/main/java/fr/free/nrw/commons/auth/SignupActivity.java

@@ -1,6 +1,5 @@
 package fr.free.nrw.commons.auth;
 
-import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
@@ -9,7 +8,9 @@ import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.Toast;
 
-public class SignupActivity extends Activity {
+import fr.free.nrw.commons.BaseActivity;
+
+public class SignupActivity extends BaseActivity {
 
     private WebView webView;
 

app/src/main/java/fr/free/nrw/commons/nearby/NearbyActivity.java

@@ -7,12 +7,12 @@ import android.location.LocationListener;
 import android.location.LocationManager;
 import android.os.Bundle;
 import android.support.v4.app.FragmentTransaction;
-import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
 
+import fr.free.nrw.commons.BaseAppCompatActivity;
 import fr.free.nrw.commons.R;
 
-public class NearbyActivity extends AppCompatActivity {
+public class NearbyActivity extends BaseAppCompatActivity {
 
     private MyLocationListener myLocationListener;
     private LocationManager locationManager;

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

@@ -1,8 +1,29 @@
 <resources>
 
-    <style name="AppTheme" parent="Theme.AppCompat" />
+    <style name="DarkAppTheme" parent="Theme.AppCompat">
+        <item name="mainBackground">@color/main_background_dark</item>
+        <item name="semitransparentText">@color/commons_app_blue_dark</item>
+        <item name="commonsAppBlue">@color/activity_welcome_background_dark</item>
+        <item name="subBackground">@color/sub_background_dark</item>
+        <item name="fragmentCategorisationBackground">@color/fragment_categorisation_background_dark</item>
+        <item name="buttonBackground">@color/button_background_dark</item>
+        <item name="uploadOverlayBackground">@color/upload_overlay_background_dark</item>
+        <item name="toggleButtonIcon">@drawable/toggle_inverse</item>
 
-    <style name="NoTitle" parent="AppTheme">
+    </style>
+
+    <style name="LightAppTheme" parent="Theme.AppCompat.Light">
+        <item name="mainBackground">@color/main_background_light</item>
+        <item name="semitransparentText">@color/commons_app_blue_light</item>
+        <item name="commonsAppBlue">@color/activity_welcome_background_light</item>
+        <item name="subBackground">@color/sub_background_light</item>
+        <item name="fragmentCategorisationBackground">@color/fragment_categorisation_background_light</item>
+        <item name="buttonBackground">@color/button_background_light</item>
+        <item name="uploadOverlayBackground">@color/upload_overlay_background_light</item>
+        <item name="toggleButtonIcon">@drawable/toggle</item>
+    </style>
+
+    <style name="NoTitle" parent="DarkAppTheme">
         <item name="android:windowNoTitle">true</item>
     </style>