update gradle, add ability to have only one listener at time (set sin…

…gleListener to true in expandableLayout)

app/build.gradle

@@ -17,10 +17,10 @@ android {
 }
 
 dependencies {
-    implementation 'androidx.appcompat:appcompat:1.0.0'
+    implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'androidx.recyclerview:recyclerview:1.0.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha2'
+    implementation 'androidx.recyclerview:recyclerview:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta4'
 
     implementation project(path: ':expansionpanel')
 }

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:3.6.2'
 
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1+'

expansionpanel/build.gradle

@@ -22,8 +22,8 @@ android {
 }
 
 dependencies {
-    implementation 'androidx.appcompat:appcompat:1.0.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha2'
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta4'
 }
 
 ext {

expansionpanel/src/main/java/com/github/florent37/expansionpanel/ExpansionLayout.java

@@ -22,6 +22,7 @@ public class ExpansionLayout extends NestedScrollView {
 
     private final List<IndicatorListener> indicatorListeners = new ArrayList<>();
     private final List<Listener> listeners = new ArrayList<>();
+    public Boolean singleListener = false;
     private boolean expanded = false;
     private Animator animator;
 
@@ -53,8 +54,12 @@ private void init(@NonNull Context context, @Nullable AttributeSet attrs) {
     }
 
     public void addListener(Listener listener) {
-        if (listener != null && !listeners.contains(listener))
+        if (singleListener) {
+            listeners.clear();
             listeners.add(listener);
+        } else if (listener != null && !listeners.contains(listener)) {
+            listeners.add(listener);
+        }
     }
 
     public void removeListener(Listener listener) {

expansionpanel/src/main/java/com/github/florent37/expansionpanel/HorizontalExpansionLayout.java

@@ -21,6 +21,7 @@ public class HorizontalExpansionLayout extends HorizontalScrollView {
 
     private final List<IndicatorListener> indicatorListeners = new ArrayList<>();
     private final List<Listener> listeners = new ArrayList<>();
+    public Boolean singleListener = false;
     private boolean expanded = false;
     private Animator animator;
 
@@ -52,8 +53,12 @@ private void init(@NonNull Context context, @Nullable AttributeSet attrs) {
     }
 
     public void addListener(Listener listener) {
-        if (listener != null && !listeners.contains(listener))
+        if (singleListener) {
+            listeners.clear();
             listeners.add(listener);
+        } else if (listener != null && !listeners.contains(listener)) {
+            listeners.add(listener);
+        }
     }
 
     public void removeListener(Listener listener) {

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Sep 06 16:26:15 PDT 2018
+#Wed Apr 15 00:19:09 EET 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip