-fixed style of generic Preference class.

-added workaround for handling the styles of inner-PrerenceScreen class. (will be handled just after using the settings XML file.

Author: AndroidDeveloperLB

material_preferences_library/material_preferences_library.iml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module external.linked.project.id=":material_preferences_library" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/../../AppManager" external.system.id="GRADLE" external.system.module.group="AppManager" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
+<module external.linked.project.id=":material_preferences_library" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" external.system.module.group="MaterialPreferences" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
   <component name="FacetManager">
     <facet type="android-gradle" name="Android-Gradle">
       <configuration>
@@ -72,8 +72,6 @@
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex-cache" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/appcompat-v7/22.1.1/jars" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/support-v4/22.1.1/jars" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jacoco" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/javaResources" />
@@ -91,8 +89,8 @@
     </content>
     <orderEntry type="jdk" jdkName="Android API 22 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" exported="" name="support-annotations-22.1.1" level="project" />
-    <orderEntry type="library" exported="" name="support-v4-22.1.1" level="project" />
-    <orderEntry type="library" exported="" name="appcompat-v7-22.1.1" level="project" />
+    <orderEntry type="library" exported="" name="support-annotations-22.2.0" level="project" />
+    <orderEntry type="library" exported="" name="support-v4-22.2.0" level="project" />
+    <orderEntry type="library" exported="" name="appcompat-v7-22.2.0" level="project" />
   </component>
 </module>

material_preferences_library/src/main/java/com/lb/material_preferences_library/PreferenceActivity.java

@@ -3,12 +3,19 @@
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.PreferenceGroup;
+import android.preference.PreferenceScreen;
 import android.support.annotation.XmlRes;
 import android.support.v7.widget.Toolbar;
 import android.util.TypedValue;
 import android.view.View;
 import android.view.ViewGroup;
 
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Stack;
+
 public abstract class PreferenceActivity extends AppCompatPreferenceActivity
   {
   private Toolbar _toolbar;
@@ -37,6 +44,10 @@ protected void onCreate(final Bundle savedInstanceState)
       parent.removeView(shadowView);
       }
     addPreferencesFromResource(getPreferencesXmlId());
+    final Map<Preference,PreferenceGroup> preferenceToParentMap=buildPreferenceParentTree(this);
+    for(PreferenceGroup preferenceGroup : preferenceToParentMap.values())
+      if(preferenceGroup!=null&&preferenceGroup instanceof PreferenceScreen)
+        preferenceGroup.setLayoutResource(R.layout.mpl__preference);
     _toolbar.setClickable(true);
     _toolbar.setNavigationIcon(getResIdFromAttribute(this,R.attr.homeAsUpIndicator));
     _toolbar.setNavigationOnClickListener(new View.OnClickListener()
@@ -59,4 +70,25 @@ private static int getResIdFromAttribute(final Activity activity,final int attr)
     return typedValue.resourceId;
     }
 
+  @SuppressWarnings("deprecation")
+  public static Map<Preference,PreferenceGroup> buildPreferenceParentTree(final android.preference.PreferenceActivity activity)
+    {
+    final Map<Preference,PreferenceGroup> result=new HashMap<>();
+    final Stack<PreferenceGroup> curParents=new Stack<>();
+    curParents.add(activity.getPreferenceScreen());
+    while(!curParents.isEmpty())
+      {
+      final PreferenceGroup parent=curParents.pop();
+      final int childCount=parent.getPreferenceCount();
+      for(int i=0;i<childCount;++i)
+        {
+        final Preference child=parent.getPreference(i);
+        result.put(child,parent);
+        if(child instanceof PreferenceGroup)
+          curParents.push((PreferenceGroup)child);
+        }
+      }
+    return result;
+    }
+
   }

material_preferences_library/src/main/java/com/lb/material_preferences_library/custom_preferences/Preference.java

@@ -40,11 +40,21 @@ public Preference(Context context,AttributeSet attrs,int defStyleAttr)
   public Preference(Context context,AttributeSet attrs)
     {
     super(context,attrs);
+    if(!_isInitialized)
+      {
+      _isInitialized=true;
+      init(context,attrs,0,0);
+      }
     }
 
   public Preference(Context context)
     {
     super(context);
+    if(!_isInitialized)
+      {
+      _isInitialized=true;
+      init(context,null,0,0);
+      }
     }
 
   }