upgraded versions + added notify item change for header method

app/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-	compileSdkVersion 25
-	buildToolsVersion "25.0.1"
+	compileSdkVersion 28
+	buildToolsVersion "28.0.3"
 
 	defaultConfig {
 		applicationId "org.zakariya.stickyheadersapp"
 		minSdkVersion 19
-		targetSdkVersion 25
+		targetSdkVersion 28
 		versionCode 1
 		versionName "1.0"
 	}
@@ -20,12 +20,12 @@ android {
 }
 
 dependencies {
-	compile fileTree(dir: 'libs', include: ['*.jar'])
-	testCompile 'junit:junit:4.12'
-	compile 'com.android.support:appcompat-v7:25.0.1'
-	compile 'com.android.support:design:25.0.1'
-	compile 'com.android.support:recyclerview-v7:25.0.1'
-	compile 'com.squareup.retrofit2:retrofit:2.0.2'
-	compile 'com.squareup.retrofit2:converter-gson:2.0.2'
-	compile project(path: ':stickyheaders')
+	implementation fileTree(dir: 'libs', include: ['*.jar'])
+	testImplementation 'junit:junit:4.12'
+	implementation 'com.android.support:appcompat-v7:28.0.0'
+	implementation 'com.android.support:design:28.0.0'
+	implementation 'com.android.support:recyclerview-v7:28.0.0'
+	implementation 'com.squareup.retrofit2:retrofit:2.0.2'
+	implementation 'com.squareup.retrofit2:converter-gson:2.0.2'
+	implementation project(path: ':stickyheaders')
 }

build.gradle

@@ -3,9 +3,10 @@
 buildscript {
 	repositories {
 		jcenter()
+		google()
 	}
 	dependencies {
-		classpath 'com.android.tools.build:gradle:2.2.2'
+		classpath 'com.android.tools.build:gradle:3.2.1'
 
 		classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7'
 		classpath "com.github.dcendents:android-maven-gradle-plugin:1.4.1"
@@ -18,6 +19,7 @@ buildscript {
 allprojects {
 	repositories {
 		jcenter()
+		google()
 	}
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Wed Sep 14 10:14:49 PDT 2016
+#Thu Jan 03 11:21:09 IST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

stickyheaders/build.gradle

@@ -6,12 +6,12 @@ group = 'org.zakariya.stickyheaders'
 version = '0.7.6'
 
 android {
-	compileSdkVersion 25
-	buildToolsVersion "25.0.1"
+	compileSdkVersion 28
+	buildToolsVersion "28.0.3"
 
 	defaultConfig {
 		minSdkVersion 11
-		targetSdkVersion 25
+		targetSdkVersion 28
 		versionCode 1
 		versionName version
 	}
@@ -24,9 +24,9 @@ android {
 }
 
 dependencies {
-	compile fileTree(dir: 'libs', include: ['*.jar'])
-	testCompile 'junit:junit:4.12'
-	compile 'com.android.support:recyclerview-v7:25.0.1'
+	implementation fileTree(dir: 'libs', include: ['*.jar'])
+	testImplementation 'junit:junit:4.12'
+	implementation 'com.android.support:recyclerview-v7:28.0.0'
 }
 
 task generateSourcesJar(type: Jar) {

stickyheaders/src/main/java/org/zakariya/stickyheaders/SectioningAdapter.java

@@ -1000,6 +1000,20 @@ public void notifySectionRemoved(int sectionIndex) {
 		updateCollapseAndSelectionStateForSectionChange(sectionIndex, -1);
 	}
 
+	public void notifySectionHeaderChanged(int sectionIndex) {
+		if (sections == null) {
+			buildSectionIndex();
+			notifyAllSectionsDataSetChanged();
+		} else {
+			buildSectionIndex();
+			Section section = this.sections.get(sectionIndex);
+			if (!section.hasHeader) {
+				throw new IllegalArgumentException("notifySectionFooterChanged: adapter implementation reports that section " + sectionIndex + " does not have a header");
+			}
+			notifyItemChanged(section.adapterPosition);
+		}
+	}
+
 	/**
 	 * Notify that a section has had a footer added to it
 	 *