force set all items to adapter when wrap_content is set to RV, issues…

flexbox/src/main/java/com/google/android/flexbox/FlexboxLayoutManager.java

@@ -182,6 +182,14 @@ public class FlexboxLayoutManager extends RecyclerView.LayoutManager implements
     /** The reference to the parent of the RecyclerView */
     private View mParent;
 
+    /**
+     * if mFillAllItemsForced == true fixes all issues with "not all items displayed when wrap_content"
+     * issues: #349 #336 #339
+     */
+    private Boolean mSetAllItemsForced = false;
+
+
+
     /**
      * Indicates the position that the view position that the flex line which has the view having
      * this position needs to be recomputed before the next layout.
@@ -312,6 +320,14 @@ public void setFlexWrap(@FlexWrap int flexWrap) {
         }
     }
 
+    public Boolean getmSetAllItemsForced() {
+        return mSetAllItemsForced;
+    }
+
+    public void setmSetAllItemsForced(Boolean mSetAllItemsForced) {
+        this.mSetAllItemsForced = mSetAllItemsForced;
+    }
+
     @JustifyContent
     @Override
     public int getJustifyContent() {
@@ -874,7 +890,8 @@ private void updateFlexLines(int childCount) {
             // passed as 0 from the RecyclerView)
             // Set the upper limit as the height of the device in order to prevent computing all
             // items in the adapter
-            needsToFill = mLayoutState.mInfinite ?
+            // or set the mSetAllItemsForced to true to force all items to show
+            needsToFill = mSetAllItemsForced ? 999999999 : mLayoutState.mInfinite ?
                     mContext.getResources().getDisplayMetrics().heightPixels
                     : mLayoutState.mAvailable;
         } else {
@@ -885,7 +902,8 @@ private void updateFlexLines(int childCount) {
             // passed as 0 from the RecyclerView)
             // Set the upper limit as the width of the device in order to prevent computing all
             // items in the adapter
-            needsToFill = mLayoutState.mInfinite ?
+            // or set the mSetAllItemsForced to true to force all items to show
+            needsToFill = mSetAllItemsForced ? 999999999 : mLayoutState.mInfinite ?
                     mContext.getResources().getDisplayMetrics().widthPixels
                     : mLayoutState.mAvailable;
         }