ExpandableLayout

Setup

Dependency

allprojects {
 repositories {
 ...
 maven { url 'https://jitpack.io' }
 }
}
dependencies {
 compile 'com.github.iammert:ExpandableLayout:1.3'
}

Layout

<iammert.com.expandablelib.ExpandableLayout
 android:id="@+id/el"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 app:parentLayout="@layout/layout_parent"
 app:childLayout="@layout/layout_child"/>

Set renderer

expandableLayout.setRenderer(new ExpandableLayout.Renderer<FruitCategory, Fruit>() {
 @Override
 public void renderParent(View view, FruitCategory model, boolean isExpanded, int parentPosition) {
 ((TextView) view.findViewById(R.id.tvParent)).setText(model.name);
 }
 @Override
 public void renderChild(View view, Fruit model, int parentPosition, int childPosition) {
 ((TextView) view.findViewById(R.id.tvChild)).setText(model.name);
 }
});

Set listeners

expandableLayout.setExpandListener(new ExpandCollapseListener.ExpandListener<FruitCategory>() {
 @Override
 public void onExpanded(int parentIndex, FruitCategory parent, View view) {
 //Layout expanded 
 }
});
expandableLayout.setCollapseListener(new ExpandCollapseListener.CollapseListener<FruitCategory>() {
 @Override
 public void onCollapsed(int parentIndex, FruitCategory parent, View view) {
 //Layout collapsed
 }
});

Add section or children

Section<FruitCategory, Fruit> section = new Section<>();
FruitCategory fruitCategory = new FruitCategory("Fruits");
Fruit fruit1 = new Fruit("Apple");
Fruit fruit2 = new Fruit("Orange");
section.parent = fruitCategory;
section.children.add(fruit1);
section.children.add(fruit2);
expandableLayout.addSection(section);
expandableLayout.addChild(fruitCategory, new Fruit("Grape"));

License

Copyright 2017 Mert Şimşek.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
 http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.