feat(indicator): customize indicator with drawable res by viewType

library/src/main/java/cz/intik/overflowindicator/OverflowPagerIndicator.java

@@ -6,6 +6,7 @@
 import android.graphics.drawable.GradientDrawable;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
+import android.util.SparseIntArray;
 import android.util.TypedValue;
 import android.view.View;
 import android.widget.LinearLayout;
@@ -17,7 +18,10 @@
 import com.transitionseverywhere.TransitionSet;
 
 import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
 
+import androidx.annotation.DrawableRes;
 import androidx.annotation.Nullable;
 import androidx.core.content.ContextCompat;
 import androidx.recyclerview.widget.PagerSnapHelper;
@@ -53,6 +57,7 @@ public class OverflowPagerIndicator extends LinearLayout {
     private RecyclerView         mRecyclerView;
     private OverflowDataObserver mDataObserver;
 
+    private SparseIntArray mapDrawablesIndicator = new SparseIntArray();
     private int dotStrokeColor;
     private int dotFillColor;
 
@@ -122,6 +127,10 @@ public void attachToRecyclerView(final RecyclerView recyclerView) {
         initIndicators();
     }
 
+    public void registerDrawableIndicator(@DrawableRes Integer imageRes, int viewType) {
+        mapDrawablesIndicator.put(viewType, imageRes);
+    }
+
     void updateIndicatorsCount() {
         if (mIndicatorCount != mRecyclerView.getAdapter().getItemCount()) {
             initIndicators();
@@ -164,7 +173,7 @@ private void updateOverflowState(int position) {
         float[] positionStates = new float[mIndicatorCount + 1];
         Arrays.fill(positionStates, STATE_GONE);
 
-        int start     = position - MAX_INDICATORS + 4;
+        int start = position - MAX_INDICATORS + 4;
         int realStart = Math.max(0, start);
 
         if (realStart + MAX_INDICATORS > mIndicatorCount) {
@@ -200,7 +209,7 @@ private void updateOverflowState(int position) {
 
     private void updateIndicators(float[] positionStates) {
         for (int i = 0; i < mIndicatorCount; i++) {
-            View  v     = getChildAt(i);
+            View v = getChildAt(i);
             float state = positionStates[i];
 
             if (state == STATE_GONE) {
@@ -222,13 +231,23 @@ private void createIndicators(int indicatorSize, int margin) {
         }
 
         for (int i = 0; i < mIndicatorCount; i++) {
-            addIndicator(mIndicatorCount > MAX_INDICATORS, indicatorSize, margin);
+            addIndicator(mIndicatorCount > MAX_INDICATORS, indicatorSize, margin, i);
         }
     }
 
-    private void addIndicator(boolean isOverflowState, int indicatorSize, int margin) {
+    private void addIndicator(boolean isOverflowState, int indicatorSize, int margin, int position) {
         View view = new View(getContext());
-        view.setBackground(getDotDrawable());
+        int viewType = -1;
+        if (mRecyclerView.getAdapter() != null){
+            viewType = mRecyclerView.getAdapter().getItemViewType(position);
+        }
+
+        if (mapDrawablesIndicator.indexOfKey(viewType) > -1) {
+            int res = mapDrawablesIndicator.get(viewType);
+            view.setBackground(ContextCompat.getDrawable(getContext(), res));
+        }else {
+            view.setBackground(getDotDrawable());
+        }
         if (isOverflowState) {
             animateViewScale(view, STATE_SMALLEST);
         } else {

sample-app/src/main/java/cz/intik/overflowpagerindicator/MainActivity.java

@@ -36,6 +36,8 @@ private void initRecyclerWithIndicator(int recyclerViewId, int indicatorViewId,
         recyclerView.setAdapter(adapter);
 
         overflowPagerIndicator.attachToRecyclerView(recyclerView);
+        overflowPagerIndicator.registerDrawableIndicator(R.drawable.ic_play_circle_outline_black_24dp, 0);
+        overflowPagerIndicator.registerDrawableIndicator(R.drawable.ic_image_black_24dp, 1);
 
         new SimpleSnapHelper(overflowPagerIndicator).attachToRecyclerView(recyclerView);
 
@@ -73,6 +75,17 @@ public int getItemCount() {
             return itemCount;
         }
 
+        @Override
+        public int getItemViewType(int position) {
+            if (position == 1){
+                return 1; //video drawable
+            }
+            else if (position == 3) {
+                return 99; //default getDotDrawable (viewType unknown)
+            }
+            return super.getItemViewType(position);
+        }
+
         void updateItemCount(int newCount) {
             itemCount = newCount;
 

sample-app/src/main/res/drawable/ic_image_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M21,19V5c0,-1.1 -0.9,-2 -2,-2H5c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2zM8.5,13.5l2.5,3.01L14.5,12l4.5,6H5l3.5,-4.5z"/>
+</vector>

sample-app/src/main/res/drawable/ic_play_circle_outline_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M10,16.5l6,-4.5 -6,-4.5v9zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8z"/>
+</vector>