Switch from preference-v7 to preference-v14 to make preferences look more Material (thanks biociahi!)

app/build.gradle

@@ -63,7 +63,7 @@ dependencies {
     compile 'com.android.support:appcompat-v7:23.+'
     compile 'com.android.support:cardview-v7:23.+'
     compile 'com.android.support:design:23.+'
-    compile 'com.android.support:preference-v7:23.+'
+    compile 'com.android.support:preference-v14:23.+'
 
     compile 'com.github.yukuku:ambilwarna:2.0.1'
     compile project(':MemorizingTrustManager')

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

@@ -23,6 +23,9 @@
     <color name="very_light_grey">#ebebeb</color>
     <color name="white">#ffffff</color>
 
+    <!-- preference-v14 uses this color for categories text -->
+    <color name="preference_fallback_accent_color">@color/orangeA700</color>
+
 
     <!-- app theme -->
 
@@ -33,7 +36,7 @@
         <item name="colorAccent">@color/orangeA700</item>
         <item name="android:textColorPrimary">@drawable/text_color</item>
         <item name="android:textColorSecondary">@color/grey</item>
-        <item name="preferenceTheme">@style/PreferenceThemeOverlay</item>
+        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
     </style>
 
     <style name="AppTheme.NoActionBar">
@@ -101,4 +104,4 @@
         <item name="android:textColor">@color/orangeA700</item>
     </style>
 
-</resources>
+</resources>