Easy implementation of RecyclerView with headers and items
#####Step 1. Add the JitPack repository to your build file ######Add it in your root build.gradle at the end of repositories:
allprojects {
repositories {
...
maven { url "https://jitpack.io" }
}
}
#####Step 2. Add the dependency
dependencies {
compile 'com.github.IntruderShanky:Sectioned-RecyclerView:2.1.1'
}
There are very easy and simple steps to implement. #####Step 1. Add RecyclerView in layout file:
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
#####Step 2. Create another layout file for Section Header:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="26dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:orientation="vertical">
<TextView
android:id="@+id/section"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="16sp"
android:textSize="16sp"
android:textStyle="bold"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="5dp"
android:background="#88424242"/>
</LinearLayout>
#####Step 3. Create another layout file for Section Child:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="8dp"
android:orientation="vertical">
<TextView
android:id="@+id/child"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:text="mc sjcnscdj "
android:padding="8dp"
android:fontFamily="sans-serif-condensed"/>
</LinearLayout>
#####Step 4. Create a class for Section Child and named it. Here "Child.java"
public class Child {
String name;
public Child(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
#####Step 5. Create a class for Section Header and implement it with Section. Here "Section.java"
public class SectionHeader implements Section<Child> {
List<Child> childList;
String sectionText;
public SectionHeader(List<Child> childList, String sectionText) {
this.childList = childList;
this.sectionText = sectionText;
}
@Override
public List<Child> getChildItems() {
return childList;
}
public String getSectionText() {
return sectionText;
}
}
#####Step 6. Create a two ViewHolder classes to hold the views of section and child.
public class SectionViewHolder extends RecyclerView.ViewHolder {
TextView name;
public SectionViewHolder(View itemView) {
super(itemView);
name = (TextView) itemView.findViewById(R.id.section);
}
}
public class ChildViewHolder extends RecyclerView.ViewHolder {
TextView name;
public ChildViewHolder(View itemView) {
super(itemView);
name = (TextView) itemView.findViewById(R.id.child);
}
}
#####Step 7. Create a Adater for RecyclerView. Here "AdapterSectionRecycler.java"
public class AdapterSectionRecycler extends SectionRecyclerViewAdapter<Section, Child, SectionViewHolder, ChildViewHolder> {
Context context;
public AdapterSectionRecycler(Context context, List<Section> sectionItemList) {
super(context, sectionItemList);
this.context = context;
}
@Override
public SectionViewHolder onCreateSectionViewHolder(ViewGroup sectionViewGroup, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.section_item, sectionViewGroup, false);
return new SectionViewHolder(view);
}
@Override
public ChildViewHolder onCreateChildViewHolder(ViewGroup childViewGroup, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.item_layout, childViewGroup, false);
return new ChildViewHolder(view);
}
@Override
public void onBindSectionViewHolder(SectionViewHolder sectionViewHolder, int sectionPosition, Section section) {
sectionViewHolder.name.setText(section.sectionText);
}
@Override
public void onBindChildViewHolder(ChildViewHolder childViewHolder, int sectionPosition, int childPosition, Child child) {
childViewHolder.name.setText(child.getName());
}
}
#####Step 8. Here complete code of your Activity Class, Here "MainActivity.java"
public class MainActivity extends AppCompatActivity {
RecyclerView recyclerView;
AdapterSectionRecycler adapterRecycler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//initialize RecyclerView
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
//setLayout Manager
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setHasFixedSize(true);
//Create a List of Child DataModel
List<Child> childList = new ArrayList<>();
childList.add(new Child("April"));
childList.add(new Child("Austin"));
childList.add(new Child("Alex"));
childList.add(new Child("Aakash"));
//Create a List of Section DataModel implements Section
List<Section> sections = new ArrayList<>();
sections.add(new Section(childList, "A"));
childList = new ArrayList<>();
childList.add(new Child("Bill Gates"));
childList.add(new Child("Bob Proctor"));
childList.add(new Child("Bryan Tracy"));
sections.add(new Section(childList, "B"));
childList = new ArrayList<>();
childList.add(new Child("Intruder Shanky"));
childList.add(new Child("Invincible Vinod"));
sections.add(new Section(childList, "I"));
childList = new ArrayList<>();
childList.add(new Child("Jim Carry"));
sections.add(new Section(childList, "J"));
childList = new ArrayList<>();
childList.add(new Child("Neil Patrick Harris"));
sections.add(new Section(childList, "N"));
childList = new ArrayList<>();
childList.add(new Child("Orange"));
childList.add(new Child("Olive"));
sections.add(new Section(childList, "O"));
adapterRecycler = new AdapterSectionRecycler(this, sections);
recyclerView.setAdapter(adapterRecycler);
}
}
insertNewSection(Section)
insertNewSection(Section, int)
removeSection(int)
insertNewChild(Object, int)
insertNewChild(Object, int, int)
removeChild(int, int)
/* To notify the adapter for data change
* call notifyDataChanged(List) instead of
* notiftDatasetChanged()
*/
notifyDataChanged(List)
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