diff --git a/src/NativePicker.android.tsx b/src/NativePicker.android.tsx
index a984b18..265331f 100644
--- a/src/NativePicker.android.tsx
+++ b/src/NativePicker.android.tsx
@@ -44,38 +44,49 @@ class Picker extends React.Component<IPickerProp & IPickerProps, any> {
   contentRef: any;
   indicatorRef: any;
 
-  onItemLayout = (e) => {
+  onItemLayout = e => {
     const { height, width } = e.nativeEvent.layout;
     // console.log('onItemLayout', height);
     if (this.itemHeight !== height || this.itemWidth !== width) {
       this.itemWidth = width;
-      this.indicatorRef.setNativeProps({
-        style: [
-          styles.indicator,
-          {
-            top: height * 3,
-            height,
-            width,
-          },
-        ],
-      });
+      if (this.indicatorRef) {
+        this.indicatorRef.setNativeProps({
+          style: [
+            styles.indicator,
+            {
+              top: height * 3,
+              height,
+              width,
+            },
+          ],
+        });
+      }
     }
     if (this.itemHeight !== height) {
       this.itemHeight = height;
-      this.scrollerRef.setNativeProps({
-        style: {
-          height: height * 7,
-        },
-      });
-      this.contentRef.setNativeProps({
-        style: {
-          paddingTop: height * 3,
-          paddingBottom: height * 3,
-        },
-      });
+      if (this.scrollerRef) {
+        this.scrollerRef.setNativeProps({
+          style: {
+            height: height * 7,
+          },
+        });
+      }
+      if (this.contentRef) {
+        this.contentRef.setNativeProps({
+          style: {
+            paddingTop: height * 3,
+            paddingBottom: height * 3,
+          },
+        });
+      }
+
       // i do no know why!...
       setTimeout(() => {
-        this.props.select(this.props.selectedValue, this.itemHeight, this.scrollTo);
+        this.props.select(
+          this.props.selectedValue,
+          this.itemHeight,
+          this.scrollTo,
+        );
       }, 0);
     }
   }
@@ -94,20 +105,25 @@ class Picker extends React.Component<IPickerProp & IPickerProps, any> {
     }
   }
 
-  scrollTo = (y) => {
-    this.scrollerRef.scrollTo({
-      y,
-      animated: false,
-    });
+  scrollTo = y => {
+    if (this.scrollerRef) {
+      this.scrollerRef.scrollTo({
+        y,
+        animated: false,
+      });
+    }
   }
 
-  fireValueChange = (selectedValue) => {
-    if (this.props.selectedValue !== selectedValue && this.props.onValueChange) {
+  fireValueChange = selectedValue => {
+    if (
+      this.props.selectedValue !== selectedValue &&
+      this.props.onValueChange
+    ) {
       this.props.onValueChange(selectedValue);
     }
   }
 
-  onScroll = (e) => {
+  onScroll = e => {
     const { y } = e.nativeEvent.contentOffset;
     this.clearScrollBuffer();
     this.scrollBuffer = setTimeout(() => {
@@ -126,11 +142,13 @@ class Picker extends React.Component<IPickerProp & IPickerProps, any> {
       totalStyle.push(itemStyle);
       return (
         <View
-          ref={el => this[`item${index}`] = el}
+          ref={el => (this[`item${index}`] = el)}
           onLayout={index === 0 ? this.onItemLayout : undefined}
           key={item.key}
         >
-          <Text style={totalStyle} numberOfLines={1}>{item.props.label}</Text>
+          <Text style={totalStyle} numberOfLines={1}>
+            {item.props.label}
+          </Text>
         </View>
       );
     });
@@ -138,17 +156,15 @@ class Picker extends React.Component<IPickerProp & IPickerProps, any> {
       <View style={style}>
         <ScrollView
           style={styles.scrollView}
-          ref={el => this.scrollerRef = el}
+          ref={el => (this.scrollerRef = el)}
           onScroll={this.onScroll}
           scrollEventThrottle={16}
           showsVerticalScrollIndicator={false}
           overScrollMode="never"
         >
-          <View ref={el => this.contentRef = el}>
-            {items}
-          </View>
+          <View ref={el => (this.contentRef = el)}>{items}</View>
         </ScrollView>
-        <View ref={el => this.indicatorRef = el} style={styles.indicator}/>
+        <View ref={el => (this.indicatorRef = el)} style={styles.indicator} />
       </View>
     );
   }