เทมเพลตเนทีฟใน Dart

class NativeExampleState extends State<NativeExample> {
  NativeAd? nativeAd;
  bool _nativeAdIsLoaded = false;

 // TODO: replace this test ad unit with your own ad unit.
 final String _adUnitId = Platform.isAndroid
      ? 'ca-app-pub-3940256099942544/2247696110'
      : 'ca-app-pub-3940256099942544/3986624511';

  /// Loads a native ad.
  void loadAd() {
    _nativeAd = NativeAd(
        adUnitId: _adUnitId,
        listener: NativeAdListener(
          onAdLoaded: (ad) {
            debugPrint('$NativeAd loaded.');
            setState(() {
              _nativeAdIsLoaded = true;
            });
          },
          onAdFailedToLoad: (ad, error) {
            // Dispose the ad here to free resources.
            debugPrint('$NativeAd failed to load: $error');
            ad.dispose();
          },
        ),
        request: const AdRequest(),
        // Styling
        nativeTemplateStyle: NativeTemplateStyle(
            // Required: Choose a template.
            templateType: TemplateType.medium,
            // Optional: Customize the ad's style.
            mainBackgroundColor: Colors.purple,
            cornerRadius: 10.0,
            callToActionTextStyle: NativeTemplateTextStyle(
                textColor: Colors.cyan,
                backgroundColor: Colors.red,
                style: NativeTemplateFontStyle.monospace,
                size: 16.0),
            primaryTextStyle: NativeTemplateTextStyle(
                textColor: Colors.red,
                backgroundColor: Colors.cyan,
                style: NativeTemplateFontStyle.italic,
                size: 16.0),
            secondaryTextStyle: NativeTemplateTextStyle(
                textColor: Colors.green,
                backgroundColor: Colors.black,
                style: NativeTemplateFontStyle.bold,
                size: 16.0),
            tertiaryTextStyle: NativeTemplateTextStyle(
                textColor: Colors.brown,
                backgroundColor: Colors.amber,
                style: NativeTemplateFontStyle.normal,
                size: 16.0)))
      ..load();
  }
}

class NativeExampleState extends State<NativeExample> {
  NativeAd? _nativeAd;
  bool _nativeAdIsLoaded = false;

 // TODO: replace this test ad unit with your own ad unit.
 final String _adUnitId = Platform.isAndroid
      ? 'ca-app-pub-3940256099942544/2247696110'
      : 'ca-app-pub-3940256099942544/3986624511';

  /// Loads a native ad.
  void loadAd() {
    _nativeAd = NativeAd(
        adUnitId: _adUnitId,
        listener: NativeAdListener(
          onAdLoaded: (ad) {
            print('$NativeAd loaded.');
            setState(() {
              _nativeAdIsLoaded = true;
            });
          },
          onAdFailedToLoad: (ad, error) {
            // Dispose the ad here to free resources.
            print('$NativeAd failedToLoad: $error');
            ad.dispose();
          },
          // Called when a click is recorded for a NativeAd.
          onAdClicked: (ad) {},
          // Called when an impression occurs on the ad.
          onAdImpression: (ad) {},
          // Called when an ad removes an overlay that covers the screen.
          onAdClosed: (ad) {},
          // Called when an ad opens an overlay that covers the screen.
          onAdOpened: (ad) {},
          // For iOS only. Called before dismissing a full screen view
          onAdWillDismissScreen: (ad) {},
          // Called when an ad receives revenue value.
          onPaidEvent: (ad, valueMicros, precision, currencyCode) {},
        ),
        request: const AdRequest(),
        // Styling
        nativeTemplateStyle: NativeTemplateStyle(
            // Required: Choose a template.
            templateType: TemplateType.medium,
            // Optional: Customize the ad's style.
            mainBackgroundColor: Colors.purple,
            cornerRadius: 10.0,
            callToActionTextStyle: NativeTemplateTextStyle(
                textColor: Colors.cyan,
                backgroundColor: Colors.red,
                style: NativeTemplateFontStyle.monospace,
                size: 16.0),
            primaryTextStyle: NativeTemplateTextStyle(
                textColor: Colors.red,
                backgroundColor: Colors.cyan,
                style: NativeTemplateFontStyle.italic,
                size: 16.0),
            secondaryTextStyle: NativeTemplateTextStyle(
                textColor: Colors.green,
                backgroundColor: Colors.black,
                style: NativeTemplateFontStyle.bold,
                size: 16.0),
            tertiaryTextStyle: NativeTemplateTextStyle(
                textColor: Colors.brown,
                backgroundColor: Colors.amber,
                style: NativeTemplateFontStyle.normal,
                size: 16.0)))
      ..load();
  }
}

// Small template
final adContainer = ConstrainedBox(
  constraints: const BoxConstraints(
    minWidth: 320, // minimum recommended width
    minHeight: 90, // minimum recommended height
    maxWidth: 400,
    maxHeight: 200,
  ),
  child: AdWidget(ad: _nativeAd!),
);

// Medium template
final adContainer = ConstrainedBox(
  constraints: const BoxConstraints(
    minWidth: 320, // minimum recommended width
    minHeight: 320, // minimum recommended height
    maxWidth: 400,
    maxHeight: 400,
  ),
  child: AdWidget(ad: _nativeAd!),
);