Fix to sdkLoc in build. Added light (without dark action bar) theme.

NOTE: I don't know how android will go with adding a new property
to a string-array resource, but not having it translated everywhere.
Will it struggle because the EN version has three values for "theme",
but other translations only have two?

build.gradle

@@ -10,7 +10,7 @@ buildscript {
 apply plugin: 'android'
 
 def toolVersion = "19.1"
-sdkLoc = android.plugin.sdkDirectory
+sdkLoc = getSdkPath()
 
 FileCollection getAndroidPrebuilt(String apiLevel) {
 	files("$sdkLoc/platforms/android-$apiLevel/android.jar")
@@ -142,3 +142,18 @@ subprojects {
 		}
 	}
 }
+
+/**
+ * Currently a bit hacky, because android.plugin is protected.
+ * The end goal is to find something in the android BaseExtension class found here:
+ *  https://android.googlesource.com/platform/tools/build/+/master/gradle/src/main/groovy/com/android/build/gradle/BaseExtension.groovy
+ * which ends up asking their Sdk class for it's location. That class knows about
+ * both ANDROID_HOME env variables, and also local.properties sdk.loc properties.
+ * 
+ * If in the future, the android.adbExe is found to be inappropriate, deprecated,
+ * or a better way of finding the sdk path exists, we can change the implementation
+ * of this method to reflect that.
+ */
+def getSdkPath() {
+	new File( "$android.adbExe/../../" ).canonicalPath
+}

res/values/array.xml

@@ -11,5 +11,6 @@
 	<string-array name="themeNames">
 		<item>Dark</item>
 		<item>Light</item>
+		<item>Light (with dark action bar)</item>
 	</string-array>
 </resources>

res/values/no_trans.xml

@@ -25,6 +25,7 @@
 	<string-array name="themeValues">
 		<item>dark</item>
 		<item>light</item>
+		<item>lightWithDarkActionBar</item>
 	</string-array>
 
 </resources>

res/values/styles.xml

@@ -4,7 +4,11 @@
         <!-- backward-compatibility theme options go here -->
     </style>
 
-    <style name="AppBaseThemeLight" parent="Theme.AppCompat.Light.DarkActionBar">
+    <style name="AppBaseThemeLight" parent="Theme.AppCompat.Light">
+        <!-- backward-compatibility theme options go here -->
+    </style>
+
+    <style name="AppBaseThemeLightWithDarkActionBar" parent="Theme.AppCompat.Light.DarkActionBar">
         <!-- backward-compatibility theme options go here -->
     </style>
 
@@ -25,4 +29,8 @@
         <!-- customizations that are not API-level specific go here. -->
     </style>
 
+    <style name="AppThemeLightWithDarkActionBar" parent="AppBaseThemeLightWithDarkActionBar">
+        <!-- customizations that are not API-level specific go here. -->
+    </style>
+
 </resources>

src/org/fdroid/fdroid/FDroidApp.java

@@ -76,7 +76,7 @@ public class FDroidApp extends Application {
     BluetoothAdapter bluetoothAdapter = null;
 
     private static enum Theme {
-        dark, light
+        dark, light, lightWithDarkActionBar
     }
 
     private static Theme curTheme = Theme.dark;
@@ -95,6 +95,9 @@ public class FDroidApp extends Application {
             case light:
                 activity.setTheme(R.style.AppThemeLight);
                 break;
+            case lightWithDarkActionBar:
+                activity.setTheme(R.style.AppThemeLightWithDarkActionBar);
+                break;
         }
     }