Fix nativeView issues

Fix Listeners base class

tns-core-modules/ui/activity-indicator/activity-indicator.android.ts

@@ -3,31 +3,31 @@
 export * from "./activity-indicator-common";
 
 export class ActivityIndicator extends ActivityIndicatorBase {
-    nativeView: android.widget.ProgressBar;
+    _progressBar: android.widget.ProgressBar;
 
     public _createUI() {
-        this.nativeView = new android.widget.ProgressBar(this._context);
+        this._progressBar = new android.widget.ProgressBar(this._context);
-        this.nativeView.setVisibility(android.view.View.INVISIBLE);
+        this._progressBar.setVisibility(android.view.View.INVISIBLE);
-        this.nativeView.setIndeterminate(true);
+        this._progressBar.setIndeterminate(true);
     }
 
     get android(): android.widget.ProgressBar {
-        return this.nativeView;
+        return this._progressBar;
     }
 
     get [busyProperty.native](): boolean {
-        return this.nativeView.getVisibility() === android.view.View.VISIBLE;
+        return this._progressBar.getVisibility() === android.view.View.VISIBLE;
     }
     set [busyProperty.native](value: boolean) {
-        this.nativeView.setVisibility(value ? android.view.View.VISIBLE : android.view.View.INVISIBLE);
+        this._progressBar.setVisibility(value ? android.view.View.VISIBLE : android.view.View.INVISIBLE);
     }
 
     get [visibilityProperty.native](): number {
-        return this.nativeView.getVisibility();
+        return this._progressBar.getVisibility();
     }
     set [visibilityProperty.native](value: number) {
         this.busy = value === android.view.View.VISIBLE;
-        this.nativeView.setVisibility(value);
+        this._progressBar.setVisibility(value);
     }
 
     get [colorProperty.native](): number {
@@ -35,10 +35,10 @@ export class ActivityIndicator extends ActivityIndicatorBase {
     }
     set [colorProperty.native](value: number) {
         if (value < 0) {
-            this.nativeView.getIndeterminateDrawable().clearColorFilter();
+            this._progressBar.getIndeterminateDrawable().clearColorFilter();
         }
         else {
-            this.nativeView.getIndeterminateDrawable().setColorFilter(value, android.graphics.PorterDuff.Mode.SRC_IN);
+            this._progressBar.getIndeterminateDrawable().setColorFilter(value, android.graphics.PorterDuff.Mode.SRC_IN);
         }
     }
 }

tns-core-modules/ui/button/button.android.ts

@@ -6,8 +6,9 @@
 export * from "./button-common";
 
 @Interfaces([android.view.View.OnClickListener])
-class ClickListener implements android.view.View.OnClickListener {
+class ClickListener extends java.lang.Object implements android.view.View.OnClickListener {
     constructor(public owner: WeakRef<Button>) {
+        super();
         return global.__native(this);
     }
 
@@ -20,19 +21,19 @@ class ClickListener implements android.view.View.OnClickListener {
 }
 
 export class Button extends ButtonBase {
-    nativeView: android.widget.Button;
+    _button: android.widget.Button;
     private _isPressed: boolean;
     private _transformationMethod;
     private _highlightedHandler: (args: TouchGestureEventData) => void;
 
     get android(): android.widget.Button {
-        return this.nativeView;
+        return this._button;
     }
 
     public _createUI() {
         let weakRef = new WeakRef(this);
-        this.nativeView = new android.widget.Button(this._context);
+        this._button = new android.widget.Button(this._context);
-        this.nativeView.setOnClickListener(new ClickListener(weakRef));
+        this._button.setOnClickListener(new ClickListener(weakRef));
     }
 
     public _setFormattedTextPropertyToNative(value: FormattedString) {
@@ -48,7 +49,7 @@ export class Button extends ButtonBase {
             }
         }
 
-        this.nativeView.setText(newText);
+        this._button.setText(newText);
     }
 
     @PseudoClassHandler("normal", "highlighted", "pressed", "active")

tns-core-modules/ui/core/properties.ts

@@ -10,6 +10,20 @@ let cssSymbolPropertyMap = {};
 let inheritableProperties = new Array<InheritedProperty<any, any>>();
 let inheritableCssProperties = new Array<InheritedCssProperty<any, any>>();
 
+function print(map) {
+    let symbols = (<any>Object).getOwnPropertySymbols(map);
+    for (let symbol of symbols) {
+        const prop = map[symbol];
+        if (!prop.registered) {
+            console.log(`Property ${prop.name} not Registered!!!!!`);
+        }
+    }
+}
+export function printUnregisteredProperties(): void {
+    print(symbolPropertyMap);
+    print(cssSymbolPropertyMap)
+}
+
 const enum ValueSource {
     Default = 0,
     Inherited = 1,
@@ -650,6 +664,7 @@ export class InheritedCssProperty<T extends Style, U> extends CssProperty<T, U>
 }
 
 export class ShorthandProperty<T extends Style> {
+    private registered: boolean;
     private readonly setLocalValue: (value: string) => void;
     private readonly setCssValue: (value: string) => void;
 
@@ -721,6 +736,10 @@ export class ShorthandProperty<T extends Style> {
     }
 
     public register(cls: { prototype: T }): void {
+        if (this.registered) {
+            throw new Error(`Property ${this.name} already registered.`);
+        }
+        this.registered = true;
         Object.defineProperty(cls.prototype, this.name, this.localValueDescriptor);
         Object.defineProperty(cls.prototype, this.cssName, this.cssValueDescriptor);
     }

tns-core-modules/ui/core/view-common.ts

@@ -6,7 +6,7 @@ import { Background } from "ui/styling/background";
 import {
     ViewBase, getEventOrGestureName, Observable, EventData, Style,
     Property, InheritedProperty, CssProperty, ShorthandProperty, InheritedCssProperty,
-    gestureFromString, isIOS, traceEnabled, traceWrite, traceCategories, traceNotifyEvent
+    gestureFromString, isIOS, traceEnabled, traceWrite, traceCategories, traceNotifyEvent, printUnregisteredProperties
 } from "./view-base";
 import { observe as gestureObserve, GesturesObserver, GestureTypes, GestureEventData } from "ui/gestures";
 import { Font, parseFont } from "ui/styling/font";
@@ -931,11 +931,6 @@ export abstract class ViewCommon extends ViewBase implements ViewDefinition {
         return undefined;
     }
 
-    public _shouldApplyStyleHandlers() {
-        // If we have native view we are ready to apply style handelr;
-        return !!this._nativeView;
-    }
-
     public focus(): boolean {
         return undefined;
     }
@@ -1456,10 +1451,12 @@ function convertToTransform(value: string): [CssProperty<any, any>, any][] {
 
 // Background properties.
 export const backgroundInternalProperty = new CssProperty<Style, Background>({ name: "backgroundInternal", cssName: "_backgroundInternal", defaultValue: Background.default });
+backgroundInternalProperty.register(Style);
 
 let pattern: RegExp = /url\(('|")(.*?)\1\)/;
 export const backgroundImageProperty = new CssProperty<Style, string>({
     name: "backgroundImage", cssName: "background-image", valueChanged: (target, oldValue, newValue) => {
+
         let style = target;
         let currentBackground = target.backgroundInternal;
         let url: string = newValue;
@@ -1505,6 +1502,7 @@ backgroundImageProperty.register(Style);
 
 export const backgroundColorProperty = new CssProperty<Style, Color>({
     name: "backgroundColor", cssName: "background-color", valueChanged: (target, newValue) => {
+        printUnregisteredProperties();
         let background = target.backgroundInternal;
         target.backgroundInternal = background.withColor(newValue);
     }, equalityComparer: Color.equals, valueConverter: (value) => new Color(value)

tns-core-modules/ui/core/view.android.ts

@@ -23,8 +23,9 @@ const VIEW_GROUP = "_viewGroup";
 
 // TODO: Move this class into widgets.
 @Interfaces([android.view.View.OnTouchListener])
-class DisableUserInteractionListener implements android.view.View.OnTouchListener {
+class DisableUserInteractionListener extends java.lang.Object implements android.view.View.OnTouchListener {
     constructor() {
+        super();
         return global.__native(this);
     }
 
@@ -34,8 +35,9 @@ class DisableUserInteractionListener implements android.view.View.OnTouchListene
 }
 
 @Interfaces([android.view.View.OnTouchListener])
-class TouchListener implements android.view.View.OnTouchListener {
+class TouchListener extends java.lang.Object implements android.view.View.OnTouchListener {
     constructor(private owner: WeakRef<View>) {
+        super();
         return global.__native(this);
     }
 
@@ -223,6 +225,8 @@ export class View extends ViewCommon {
             this._nativeView.setLayoutParams(new org.nativescript.widgets.CommonLayoutParams());
         }
 
+        this.nativeView = this._nativeView;
+
         if (traceEnabled) {
             traceNotifyEvent(this, "_onContextChanged");
         }
@@ -1079,11 +1083,11 @@ export class CustomLayoutView extends View implements CustomLayoutViewDefinition
     public _addViewToNativeVisualTree(child: ViewCommon, atIndex: number = -1): boolean {
         super._addViewToNativeVisualTree(child);
 
-        if (this.nativeView && child.nativeView) {
+        if (this._nativeView && child.nativeView) {
             if (traceEnabled) {
                 traceWrite(`${this}.nativeView.addView(${child}.nativeView, ${atIndex})`, traceCategories.VisualTreeEvents);
             }
-            this._nativeView.addView(child._nativeView, atIndex);
+            this._nativeView.addView(child.nativeView, atIndex);
             return true;
         }
 

tns-core-modules/ui/core/view.d.ts

@@ -126,11 +126,6 @@ declare module "ui/core/view" {
      * A View occupies a rectangular area on the screen and is responsible for drawing and layouting of all UI components within. 
      */
     export abstract class View extends ViewBase implements ApplyXmlAttributes {
-        /**
-         * Get the nativeView created for this object.
-         */
-        public nativeView: any;
-
         /**
          * Gets the android-specific native instance that lies behind this proxy. Will be available if running on an Android platform.
          */
@@ -609,9 +604,6 @@ declare module "ui/core/view" {
         _onDetached(force?: boolean): void;
         _createUI(): void;
 
-        _shouldApplyStyleHandlers();
-        // _checkMetadataOnPropertyChanged(metadata: dependencyObservable.PropertyMetadata);
-
         _updateLayout(): void;
 
         /**

tns-core-modules/ui/date-picker/date-picker.android.ts

@@ -6,8 +6,9 @@
 export * from "./date-picker-common";
 
 @Interfaces([android.widget.DatePicker.OnDateChangedListener])
-class DateChangedListener implements android.widget.DatePicker.OnDateChangedListener {
+class DateChangedListener extends java.lang.Object implements android.widget.DatePicker.OnDateChangedListener {
     constructor(public owner: WeakRef<DatePicker>) {
+        super()
         return global.__native(this);
     }
 
@@ -42,7 +43,7 @@ class DateChangedListener implements android.widget.DatePicker.OnDateChangedList
 export class DatePicker extends DatePickerBase {
     private _android: android.widget.DatePicker;
     public _listener: android.widget.DatePicker.OnDateChangedListener;
-    public nativeView: android.widget.DatePicker;
+    public _datePicker: android.widget.DatePicker;
 
     get android(): android.widget.DatePicker {
         return this._android;
@@ -56,48 +57,48 @@ export class DatePicker extends DatePickerBase {
     }
 
     private updateNativeDate(): void {
-        let year = typeof this.year === "number" ? this.year : this.nativeView.getYear();
+        let year = typeof this.year === "number" ? this.year : this._datePicker.getYear();
-        let month = typeof this.month === "number" ? (this.month - 1) : this.nativeView.getMonth();
+        let month = typeof this.month === "number" ? (this.month - 1) : this._datePicker.getMonth();
-        let day = typeof this.day === "number" ? this.day : this.nativeView.getDayOfMonth();
+        let day = typeof this.day === "number" ? this.day : this._datePicker.getDayOfMonth();
         this.date = new Date(year, month, day);
     }
 
     get [yearProperty.native](): number {
-        return this.nativeView.getYear();
+        return this._datePicker.getYear();
     }
     set [yearProperty.native](value: number) {
-        let picker = this.nativeView;
+        let picker = this._datePicker;
         if (picker.getYear() !== value) {
             this.updateNativeDate();
         }
     }
 
     get [monthProperty.native](): number {
-        return this.nativeView.getMonth();
+        return this._datePicker.getMonth();
     }
     set [monthProperty.native](value: number) {
-        let picker = this.nativeView;
+        let picker = this._datePicker;
         if (picker.getMonth() !== (value - 1)) {
             this.updateNativeDate();
         }
     }
 
     get [dayProperty.native](): number {
-        return this.nativeView.getDayOfMonth();
+        return this._datePicker.getDayOfMonth();
     }
     set [dayProperty.native](value: number) {
-        let picker = this.nativeView;
+        let picker = this._datePicker;
         if (picker.getDayOfMonth() !== value) {
             this.updateNativeDate();
         }
     }
 
     get [dateProperty.native](): Date {
-        let picker = this.nativeView;
+        let picker = this._datePicker;
         return new Date(picker.getYear(), picker.getMonth(), picker.getDayOfMonth());
     }
     set [dateProperty.native](value: Date) {
-        let picker = this.nativeView;
+        let picker = this._datePicker;
         if (picker.getDayOfMonth() !== value.getDay()
             || picker.getMonth() !== value.getMonth()
             || picker.getYear() !== value.getFullYear()) {
@@ -106,10 +107,10 @@ export class DatePicker extends DatePickerBase {
     }
 
     get [maxDateProperty.native](): Date {
-        return this.nativeView.getMaxDate();
+        return this._datePicker.getMaxDate();
     }
     set [maxDateProperty.native](value: Date) {
-        let picker = this.nativeView;
+        let picker = this._datePicker;
         let newValue = value.getTime();
         if (picker.getMaxDate() !== newValue) {
             picker.setMaxDate(newValue);
@@ -117,10 +118,10 @@ export class DatePicker extends DatePickerBase {
     }
 
     get [minDateProperty.native](): Date {
-        return this.nativeView.getMinDate();
+        return this._datePicker.getMinDate();
     }
     set [minDateProperty.native](value: Date) {
-        let picker = this.nativeView;
+        let picker = this._datePicker;
         let newValue = value.getTime();
         if (picker.getMinDate() !== newValue) {
             picker.setMinDate(newValue);

tns-core-modules/ui/editable-text-base/editable-text-base.android.ts

@@ -8,8 +8,9 @@
 import { ad } from "utils/utils";
 
 @Interfaces([android.text.TextWatcher])
-class TextWatcher implements android.text.TextWatcher {
+class TextWatcher extends java.lang.Object implements android.text.TextWatcher {
     constructor(private owner: WeakRef<EditableTextBase>) {
+        super();
         return global.__native(this);
     }
 
@@ -56,8 +57,9 @@ class TextWatcher implements android.text.TextWatcher {
 let dismissKeyboardTimeoutId: number;
 
 @Interfaces([android.view.View.OnFocusChangeListener])
-class FocusChangeListener implements android.view.View.OnFocusChangeListener {
+class FocusChangeListener extends java.lang.Object implements android.view.View.OnFocusChangeListener {
     constructor(private owner: WeakRef<EditableTextBase>) {
+        super();
         return global.__native(this);
     }
 
@@ -92,8 +94,9 @@ class FocusChangeListener implements android.view.View.OnFocusChangeListener {
 }
 
 @Interfaces([android.widget.TextView.OnEditorActionListener])
-class EditorActionListener implements android.widget.TextView.OnEditorActionListener {
+class EditorActionListener extends java.lang.Object implements android.widget.TextView.OnEditorActionListener {
     constructor(private owner: WeakRef<EditableTextBase>) {
+        super();
         return global.__native(this);
     }
 
@@ -133,7 +136,6 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
     private _keyListenerCache: android.text.method.KeyListener;
     private _focusChangeListener: android.view.View.OnFocusChangeListener;
     private _editorActionListener: android.widget.TextView.OnEditorActionListener;
-    public nativeView: android.widget.EditText;
 
     get android(): android.widget.EditText {
         return this._android;
@@ -180,21 +182,21 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
     }
 
     public dismissSoftInput() {
-        ad.dismissSoftInput(this._nativeView);
+        ad.dismissSoftInput(this._android);
     }
 
     public focus(): boolean {
         let result = super.focus();
 
         if (result) {
-            ad.showSoftInput(this._nativeView);
+            ad.showSoftInput(this._android);
         }
 
         return result;
     }
 
     private _setInputType(inputType): void {
-        let nativeView = this.nativeView;
+        let nativeView = this._android;
         nativeView.setInputType(inputType);
 
         // setInputType will change the keyListener so we should cache it again
@@ -210,15 +212,15 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
     }
 
     get [textProperty.native](): string {
-        return this.nativeView.getText();
+        return this._android.getText();
     }
     set [textProperty.native](value: string) {
         let newValue = value + '';
-        this.nativeView.setText(newValue, android.widget.TextView.BufferType.EDITABLE);
+        this._android.setText(newValue, android.widget.TextView.BufferType.EDITABLE);
     }
 
     get [keyboardTypeProperty.native](): "datetime" | "phone" | "number" | "url" | "email" | string {
-        let inputType = this.nativeView.getInputType();
+        let inputType = this._android.getInputType();
         switch (inputType) {
             case android.text.InputType.TYPE_CLASS_DATETIME | android.text.InputType.TYPE_DATETIME_VARIATION_NORMAL:
                 return "datetime";
@@ -276,7 +278,7 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
     }
 
     get [returnKeyTypeProperty.native](): "done" | "next" | "go" | "search" | "send" | string {
-        let ime = this.nativeView.getImeOptions();
+        let ime = this._android.getImeOptions();
         switch (ime) {
             case android.view.inputmethod.EditorInfo.IME_ACTION_DONE:
                 return "done";
@@ -329,19 +331,19 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
     }
 
     get [editableProperty.native](): boolean {
-        return !!this.nativeView.getKeyListener();
+        return !!this._android.getKeyListener();
     }
     set [editableProperty.native](value: boolean) {
         if (value) {
-            this.nativeView.setKeyListener(this._keyListenerCache);
+            this._android.setKeyListener(this._keyListenerCache);
         }
         else {
-            this.nativeView.setKeyListener(null);
+            this._android.setKeyListener(null);
         }
     }
 
     get [autocapitalizationTypeProperty.native](): "none" | "words" | "sentences" | "allCharacters" | string {
-        let inputType = this.nativeView.getInputType();
+        let inputType = this._android.getInputType();
         if ((inputType & android.text.InputType.TYPE_TEXT_FLAG_CAP_WORDS) === android.text.InputType.TYPE_TEXT_FLAG_CAP_WORDS) {
             return "words";
         } else if ((inputType & android.text.InputType.TYPE_TEXT_FLAG_CAP_SENTENCES) === android.text.InputType.TYPE_TEXT_FLAG_CAP_SENTENCES) {
@@ -353,7 +355,7 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
         }
     }
     set [autocapitalizationTypeProperty.native](value: string) {
-        let inputType = this.nativeView.getInputType();
+        let inputType = this._android.getInputType();
         inputType = inputType & ~28672; //28672 (0x00070000) 13,14,15bits (111 0000 0000 0000)
 
         switch (value) {
@@ -384,7 +386,7 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
     }
 
     get [autocorrectProperty.native](): boolean {
-        let autocorrect = this.nativeView.getInputType();
+        let autocorrect = this._android.getInputType();
         if ((autocorrect & android.text.InputType.TYPE_TEXT_FLAG_AUTO_CORRECT) === android.text.InputType.TYPE_TEXT_FLAG_AUTO_CORRECT) {
             return true;
         }
@@ -392,7 +394,7 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
         return false;
     }
     set [autocorrectProperty.native](value: boolean) {
-        let inputType = this.nativeView.getInputType();
+        let inputType = this._android.getInputType();
         switch (value) {
             case true:
                 inputType = inputType | android.text.InputType.TYPE_TEXT_FLAG_AUTO_COMPLETE;
@@ -413,20 +415,20 @@ export abstract class EditableTextBase extends EditableTextBaseCommon {
     }
 
     get [hintProperty.native](): string {
-        return this.nativeView.getHint();
+        return this._android.getHint();
     }
     set [hintProperty.native](value: string) {
-        this.nativeView.setHint(value + '');
+        this._android.setHint(value + '');
     }
 
     get [placeholderColorProperty.native](): android.content.res.ColorStateList {
-        return this.nativeView.getHintTextColors();
+        return this._android.getHintTextColors();
     }
     set [placeholderColorProperty.native](value: Color | android.content.res.ColorStateList) {
         if (value instanceof Color) {
-            this.nativeView.setHintTextColor(value.android);
+            this._android.setHintTextColor(value.android);
         } else {
-            this.nativeView.setHintTextColor(value);
+            this._android.setHintTextColor(value);
         }
     }
 }

tns-core-modules/ui/image/image.android.ts

@@ -161,8 +161,9 @@ export class Image extends ImageBase {
 }
 
 @Interfaces([org.nativescript.widgets.image.Worker.OnImageLoadedListener])
-class ImageLoadedListener implements org.nativescript.widgets.image.Worker.OnImageLoadedListener {
+class ImageLoadedListener extends java.lang.Object implements org.nativescript.widgets.image.Worker.OnImageLoadedListener {
     constructor(private owner: WeakRef<Image>) {
+        super();
         return global.__native(this);
     }
 

tns-core-modules/ui/list-picker/list-picker.android.ts

@@ -4,8 +4,9 @@ import { ItemsSource } from "ui/list-picker";
 export * from "./list-picker-common";
 
 @Interfaces([android.widget.NumberPicker.Formatter])
-class Formatter implements android.widget.NumberPicker.Formatter {
+class Formatter extends java.lang.Object implements android.widget.NumberPicker.Formatter {
     constructor(private owner: WeakRef<ListPicker>) {
+        super();
         return global.__native(this);
     }
 
@@ -20,8 +21,9 @@ class Formatter implements android.widget.NumberPicker.Formatter {
 }
 
 @Interfaces([android.widget.NumberPicker.OnValueChangeListener])
-class ValueChangeListener implements android.widget.NumberPicker.OnValueChangeListener {
+class ValueChangeListener extends java.lang.Object implements android.widget.NumberPicker.OnValueChangeListener {
     constructor(private owner: WeakRef<ListPicker>) {
+        super();
         return global.__native(this);
     }
 

tns-core-modules/ui/list-view/list-view.android.ts

@@ -14,8 +14,9 @@ const LOADMOREITEMS = ListViewBase.loadMoreItemsEvent;
 const ITEMTAP = ListViewBase.itemTapEvent;
 
 @Interfaces([android.widget.AdapterView.OnItemClickListener])
-class ItemClickListener implements android.widget.AdapterView.OnItemClickListener {
+class ItemClickListener extends java.lang.Object implements android.widget.AdapterView.OnItemClickListener {
     constructor(private owner: WeakRef<ListView>) {
+        super();
         return global.__native(this);
     }
 

tns-core-modules/ui/search-bar/search-bar.android.ts

@@ -10,8 +10,9 @@ const SEARCHTEXT = Symbol("searchText");
 const QUERY = Symbol("query");
 
 @Interfaces([android.widget.SearchView.OnQueryTextListener])
-class QueryTextListener implements android.widget.SearchView.OnQueryTextListener {
+class QueryTextListener extends java.lang.Object implements android.widget.SearchView.OnQueryTextListener {
     constructor(private owner: WeakRef<SearchBar>) {
+        super();
         return global.__native(this);
     }
 
@@ -44,8 +45,9 @@ class QueryTextListener implements android.widget.SearchView.OnQueryTextListener
 }
 
 @Interfaces([android.widget.SearchView.OnCloseListener])
-class CloseListener implements android.widget.SearchView.OnCloseListener {
+class CloseListener extends java.lang.Object implements android.widget.SearchView.OnCloseListener {
     constructor(private owner: WeakRef<SearchBar>) {
+        super();
         return global.__native(this);
     }
 

tns-core-modules/ui/segmented-bar/segmented-bar.android.ts

@@ -46,10 +46,10 @@ function setBackground(view: android.view.View, background: android.graphics.dra
 }
 
 export class SegmentedBarItem extends SegmentedBarItemBase {
-    private _nativeView: android.widget.TextView;
+    private _textView: android.widget.TextView;
 
     public setNativeView(textView: android.widget.TextView): void {
-        this._nativeView = textView;
+        this._textView = textView;
         applyNativeSetters(this);
         if (this.titleDirty) {
             this._update();
@@ -67,7 +67,7 @@ export class SegmentedBarItem extends SegmentedBarItemBase {
         //     titleTextView.setText(this.title || "");
         // }
 
-        let tv = this._nativeView;
+        let tv = this._textView;
         if (tv) {
             let title = this.title;
             title = (title === null || title === undefined) ? "" : title;
@@ -79,22 +79,22 @@ export class SegmentedBarItem extends SegmentedBarItemBase {
     }
 
     get [colorProperty.native](): number {
-        return this._nativeView.getCurrentTextColor();
+        return this._textView.getCurrentTextColor();
     }
     set [colorProperty.native](value: Color | number) {
         let color = typeof value === "Color" ? value.android : value;
-        this._nativeView.setTextColor(color);
+        this._textView.setTextColor(color);
     }
 
     get [fontInternalProperty.native](): { typeface: android.graphics.Typeface, fontSize: number } {
-        let textView = this._nativeView;
+        let textView = this._textView;
         return {
             typeface: textView.getTypeface(),
             fontSize: textView.getTextSize()
         };
     }
     set [fontInternalProperty.native](value: Font | { typeface: android.graphics.Typeface, fontSize: number }) {
-        let tv = this._nativeView;
+        let tv = this._textView;
         if (value instanceof Font) {
             tv.setTypeface(value.getAndroidTypeface());
             tv.setTextSize(value.fontSize);
@@ -105,11 +105,11 @@ export class SegmentedBarItem extends SegmentedBarItemBase {
     }
 
     get [selectedBackgroundColorProperty.native](): android.graphics.drawable.Drawable {
-        let viewGroup = <android.view.ViewGroup>this._nativeView.getParent();
+        let viewGroup = <android.view.ViewGroup>this._textView.getParent();
         return viewGroup.getBackground();
     }
     set [selectedBackgroundColorProperty.native](value: Color | android.graphics.drawable.Drawable) {
-        let viewGroup = <android.view.ViewGroup>this._nativeView.getParent();
+        let viewGroup = <android.view.ViewGroup>this._textView.getParent();
         if (value instanceof Color) {
             let color = value.android;
             let backgroundDrawable = viewGroup.getBackground();
@@ -133,8 +133,9 @@ export class SegmentedBarItem extends SegmentedBarItemBase {
 }
 
 @Interfaces([android.widget.TabHost.OnTabChangeListener])
-class TabChangeListener implements android.widget.TabHost.OnTabChangeListener {
+class TabChangeListener extends java.lang.Object implements android.widget.TabHost.OnTabChangeListener {
     constructor(private owner: WeakRef<SegmentedBar>) {
+        super();
         return global.__native(this);
     }
 
@@ -147,8 +148,9 @@ class TabChangeListener implements android.widget.TabHost.OnTabChangeListener {
 }
 
 @Interfaces([android.widget.TabHost.TabContentFactory])
-class TabContentFactory implements android.widget.TabHost.TabContentFactory {
+class TabContentFactory extends java.lang.Object implements android.widget.TabHost.TabContentFactory {
     constructor(private owner: WeakRef<SegmentedBar>) {
+        super();
         return global.__native(this);
     }
 

tns-core-modules/ui/slider/slider.android.ts

@@ -7,8 +7,9 @@
 export * from "./slider-common";
 
 @Interfaces([android.widget.SeekBar.OnSeekBarChangeListener])
-class SeekBarChangeListener implements android.widget.SeekBar.OnSeekBarChangeListener {
+class SeekBarChangeListener extends java.lang.Object implements android.widget.SeekBar.OnSeekBarChangeListener {
     constructor(private owner: WeakRef<Slider>) {
+        super();
         return global.__native(this);
     }
 

tns-core-modules/ui/switch/switch.android.ts

@@ -4,8 +4,9 @@ import { View, layout, Color, Property, colorProperty, backgroundColorProperty,
 export * from "ui/core/view";
 
 @Interfaces([android.widget.CompoundButton.OnCheckedChangeListener])
-class CheckedChangeListener implements android.widget.CompoundButton.OnCheckedChangeListener {
+class CheckedChangeListener extends java.lang.Object implements android.widget.CompoundButton.OnCheckedChangeListener {
     constructor(private owner: WeakRef<Switch>) {
+        super();
         return global.__native(this);
     }
 

tns-core-modules/ui/text-base/text-base.android.ts

@@ -63,30 +63,30 @@ class TextTransformation extends android.text.method.ReplacementTransformationMe
 
 export class TextBase extends TextBaseCommon {
     _transformationMethod: any;
-    nativeView: android.widget.TextView;
+    _nativeView: android.widget.TextView;
 
     public _setFormattedTextPropertyToNative(value: FormattedString) {
         // TODO: Check if there is an option to force call the transformation method without
         // creating new native instance.
-        if (this.nativeView) {
+        if (this._nativeView) {
-            this.nativeView.setTransformationMethod(new TextTransformation(this.text, value, this.style.textTransform));
+            this._nativeView.setTransformationMethod(new TextTransformation(this.text, value, this.style.textTransform));
         }
 
         let newText = value ? value._formattedText : null;
-        if (this.nativeView) {
+        if (this._nativeView) {
-            this.nativeView.setText(newText);
+            this._nativeView.setText(newText);
         }
     }
 
     get [textProperty.native](): string {
-        return this.nativeView.getText();
+        return this._nativeView.getText();
     }
     set [textProperty.native](value: string) {
         if (value === null || value === undefined) {
             value = "";
         }
 
-        this.nativeView.setText(value);
+        this._nativeView.setText(value);
     }
 
     get [formattedTextProperty.native](): FormattedString {
@@ -97,25 +97,25 @@ export class TextBase extends TextBaseCommon {
     }
 
     get [colorProperty.native](): android.content.res.ColorStateList {
-        return this.nativeView.getTextColors();
+        return this._nativeView.getTextColors();
     }
     set [colorProperty.native](value: Color | android.content.res.ColorStateList) {
         if (value instanceof Color) {
-            this.nativeView.setTextColor(value.android);
+            this._nativeView.setTextColor(value.android);
         } else {
-            this.nativeView.setTextColor(value);
+            this._nativeView.setTextColor(value);
         }
     }
 
     get [fontInternalProperty.native](): { typeface: android.graphics.Typeface, fontSize: number } {
-        let textView = this.nativeView;
+        let textView = this._nativeView;
         return {
             typeface: textView.getTypeface(),
             fontSize: textView.getTextSize()
         };
     }
     set [fontInternalProperty.native](value: Font | { typeface: android.graphics.Typeface, fontSize: number }) {
-        let textView = this.nativeView;
+        let textView = this._nativeView;
 
         let typeface: android.graphics.Typeface;
         let fontSize: number;
@@ -131,7 +131,7 @@ export class TextBase extends TextBaseCommon {
     }
 
     get [textAlignmentProperty.native](): string {
-        let textGravity = this.nativeView.getGravity() & android.view.View.TEXT_ALIGNMENT_GRAVITY;
+        let textGravity = this._nativeView.getGravity() & android.view.View.TEXT_ALIGNMENT_GRAVITY;
         switch (textGravity) {
             case android.view.Gravity.LEFT:
                 return "left";
@@ -147,16 +147,16 @@ export class TextBase extends TextBaseCommon {
         }
     }
     set [textAlignmentProperty.native](value: string) {
-        let verticalGravity = this.nativeView.getGravity() & android.view.Gravity.VERTICAL_GRAVITY_MASK;
+        let verticalGravity = this._nativeView.getGravity() & android.view.Gravity.VERTICAL_GRAVITY_MASK;
         switch (value) {
             case "left":
-                this.nativeView.setGravity(android.view.Gravity.LEFT | verticalGravity);
+                this._nativeView.setGravity(android.view.Gravity.LEFT | verticalGravity);
                 break;
             case "center":
-                this.nativeView.setGravity(android.view.Gravity.CENTER_HORIZONTAL | verticalGravity);
+                this._nativeView.setGravity(android.view.Gravity.CENTER_HORIZONTAL | verticalGravity);
                 break;
             case "right":
-                this.nativeView.setGravity(android.view.Gravity.RIGHT | verticalGravity);
+                this._nativeView.setGravity(android.view.Gravity.RIGHT | verticalGravity);
                 break;
             default:
                 break;
@@ -179,9 +179,9 @@ export class TextBase extends TextBaseCommon {
         }
 
         if (values.indexOf("none") === -1) {
-            this.nativeView.setPaintFlags(flags);
+            this._nativeView.setPaintFlags(flags);
         } else {
-            this.nativeView.setPaintFlags(0);
+            this._nativeView.setPaintFlags(0);
         }
     }
 
@@ -196,16 +196,16 @@ export class TextBase extends TextBaseCommon {
         return "normal";
     }
     set [whiteSpaceProperty.native](value: "normal" | "nowrap") {
-        let nativeView = this.nativeView;
+        let nativeView = this._nativeView;
         let nowrap = value === "nowrap";
         nativeView.setSingleLine(nowrap);
         nativeView.setEllipsize(nowrap ? android.text.TextUtils.TruncateAt.END : null);
     }
 
     get [letterSpacingProperty.native](): number {
-        return org.nativescript.widgets.ViewHelper.getLetterspacing(this.nativeView);
+        return org.nativescript.widgets.ViewHelper.getLetterspacing(this._nativeView);
     }
     set [letterSpacingProperty.native](value: number) {
-        org.nativescript.widgets.ViewHelper.setLetterspacing(this.nativeView, value);
+        org.nativescript.widgets.ViewHelper.setLetterspacing(this._nativeView, value);
     }
 }

tns-core-modules/ui/time-picker/time-picker.android.ts

@@ -3,8 +3,9 @@
 export * from "./time-picker-common";
 
 @Interfaces([android.widget.TimePicker.OnTimeChangedListener])
-class TimeChangedListener implements android.widget.TimePicker.OnTimeChangedListener {
+class TimeChangedListener extends java.lang.Object implements android.widget.TimePicker.OnTimeChangedListener {
     constructor(public owner: WeakRef<TimePicker>) {
+        super();
         return global.__native(this);
     }
 
@@ -19,13 +20,13 @@ class TimeChangedListener implements android.widget.TimePicker.OnTimeChangedList
 }
 
 export class TimePicker extends TimePickerBase {
-    public nativeView: android.widget.TimePicker;
+    public _timePicker: android.widget.TimePicker;
     private _listener: android.widget.TimePicker.OnTimeChangedListener;
 
     public _createUI() {
-        this.nativeView = new android.widget.TimePicker(this._context);
+        this._timePicker = new android.widget.TimePicker(this._context);
         this._listener = this._listener || new TimeChangedListener(new WeakRef(this));
-        this.nativeView.setOnTimeChangedListener(this._listener);
+        this._timePicker.setOnTimeChangedListener(this._listener);
 
         let c = java.util.Calendar.getInstance();
         if (this.hour === 0) {
@@ -59,7 +60,7 @@ export class TimePicker extends TimePickerBase {
     }
 
     get [timeProperty.native](): Date {
-        let nativeView = this.nativeView;
+        let nativeView = this._timePicker;
         return new Date(0, 0, 0, nativeView.getCurrentHour().intValue(), nativeView.getCurrentMinute().intValue());
     }
     set [timeProperty.native](value: Date) {
@@ -67,14 +68,14 @@ export class TimePicker extends TimePickerBase {
     }
 
     get [minuteProperty.native](): number {
-        return this.nativeView.getCurrentMinute().intValue();
+        return this._timePicker.getCurrentMinute().intValue();
     }
     set [minuteProperty.native](value: number) {
         this._setNativeValueSilently(this.hour, value);
     }
 
     get [hourProperty.native](): number {
-        return this.nativeView.getCurrentHour().intValue()
+        return this._timePicker.getCurrentHour().intValue()
     }
     set [hourProperty.native](value: number) {
         this._setNativeValueSilently(value, this.minute);