Improve alternative for implement start shimmer

Author: ramanaptr

app/src/main/java/com/ramanaptr/sample/MainActivity.kt

@@ -107,6 +107,9 @@ class MainActivity : AppCompatActivity() {
         // if you want use view binding you should to cast the object like the example below
         rvSample = binding.rvSample as EzRecyclerView<SampleData>
 
+        // set empty object like example "SampleData" when you use for shimmer effect, to avoid exception
+        rvSample.setData(SampleData())
+
         // set example function for pagination on Ez-RecyclerView
         // init the pagination after bind the view and declare it into field
         initPaginationEzRecyclerView()
@@ -133,6 +136,9 @@ class MainActivity : AppCompatActivity() {
         // if you want use view binding you should to cast the object like the example below
         rvSample = binding.rvSample as EzRecyclerView<SampleData>
 
+        // set empty object like example "SampleData" when you use for shimmer effect, to avoid exception
+        rvSample.setData(SampleData())
+
         // example function for pagination on Ez-RecyclerView
         // init the pagination after bind the view and declare it into field
         initPaginationEzRecyclerView()
@@ -178,7 +184,8 @@ class MainActivity : AppCompatActivity() {
     private fun exampleDataForSingleLayout(size: Int) {
         // start shimmer when load the data
         // please to use your empty object like SampleData()
-        rvSample.startShimmer(size, SampleData())
+        // rvSample.startShimmer(size, SampleData()) // Alternative
+        rvSample.startShimmer(size)
 
         // start load the data
         subscribe = Flowable.create<List<SampleData>>({
@@ -215,7 +222,8 @@ class MainActivity : AppCompatActivity() {
     private fun exampleDataForMultipleLayout(size: Int) {
         // start shimmer when load the data
         // please to use your empty object like SampleData()
-        rvSample.startShimmer(size, SampleData())
+        // rvSample.startShimmer(size, SampleData()) // Alternative
+        rvSample.startShimmer(size)
 
         // start load the data
         subscribe = Flowable.create<List<SampleData>>({

ez-recyleview/src/main/java/com/ramanaptr/widget/EzRecyclerView.java

@@ -44,6 +44,7 @@ public class EzRecyclerView<Data extends EzBaseData> extends RecyclerView {
     private int offset = 0;
     private int limit = 0;
     private int currentPage = 0;
+    private Data data;
 
     public EzRecyclerView(@NonNull Context context) {
         super(context);
@@ -76,6 +77,7 @@ public void destroy() {
         ezPaginationListener = null;
         baseAdapter = null;
         listener = null;
+        data = null;
         tempShimmerSize = 0;
         startShimmerSize = 0;
         endShimmerSize = 0;
@@ -84,6 +86,10 @@ public void destroy() {
         currentPage = 0;
     }
 
+    public void setData(Data data) {
+        this.data = data;
+    }
+
     public void setViewHolderLayout(@NonNull Listener<Data> listener) {
         this.listener = listener;
         baseAdapter.setListener(listener::setDataOnViewHolder);
@@ -140,12 +146,32 @@ public void setFlexBoxLayoutManager(@FlexDirection int flexDirection) {
         setLayoutManager(flexboxLayoutManager);
     }
 
+    public void startShimmer(int shimmerSize) {
+        if (data == null) {
+            throw new IllegalArgumentException("Please construct your empty object extended from EzBaseData into the function #setData(data) or you can use #startShimmer(size, data)");
+        }
+        if (isFirstLoadEzRecyclerView) {
+            this.startShimmerSize = baseAdapter.getItemCount();
+            this.endShimmerSize = shimmerSize;
+            this.tempShimmerSize = shimmerSize;
+            final List<Data> shimmer = new ArrayList<>();
+            for (int i = 0; i < shimmerSize; i++) {
+                data.setEzViewType(EzViewType.SHIMMER_EFFECT);
+                shimmer.add(data);
+            }
+            addAll(shimmer);
+            flagEzRecyclerViewFirstLoadDone();
+            flagOnLoading();
+        }
+    }
+
     public void startShimmer(int shimmerSize, Data data) {
         if (isFirstLoadEzRecyclerView) {
+            this.data = data;
             this.startShimmerSize = baseAdapter.getItemCount();
             this.endShimmerSize = shimmerSize;
             this.tempShimmerSize = shimmerSize;
-            List<Data> shimmer = new ArrayList<>();
+            final List<Data> shimmer = new ArrayList<>();
             for (int i = 0; i < shimmerSize; i++) {
                 data.setEzViewType(EzViewType.SHIMMER_EFFECT);
                 shimmer.add(data);