根据深色或浅色模式“原生广告”更改文本颜色

Question

我在我的 flutter 应用程序中使用原生广告（由 android native 设计的广告布局）XML File ，并且我的 flutter 应用程序中有一个深色和浅色主题， 我想在用户更改为深色/浅色模式时更改原生广告文本颜色。

原生广告文本颜色是在 Android 原生代码中设置的，而不是在 dart 文件中设置的。

科特林代码：

package com.codelab.flutter.admobinlineads;

import com.google.android.gms.ads.nativead.NativeAd;
import com.google.android.gms.ads.nativead.NativeAdView;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.Map;

import io.flutter.plugins.googlemobileads.GoogleMobileAdsPlugin;

class ListTileNativeAdFactory implements GoogleMobileAdsPlugin.NativeAdFactory {

    private final Context context;

    ListTileNativeAdFactory(Context context) {
        this.context = context;
    }

    @Override
    public NativeAdView createNativeAd(
            NativeAd nativeAd, Map<String, Object> customOptions) {
        NativeAdView nativeAdView = (NativeAdView) LayoutInflater.from(context)
                .inflate(R.layout.list_tile_native_ad, null);

        TextView attributionViewSmall = nativeAdView
                .findViewById(R.id.tv_list_tile_native_ad_attribution_small);
        TextView attributionViewLarge = nativeAdView
                .findViewById(R.id.tv_list_tile_native_ad_attribution_large);

        ImageView iconView = nativeAdView.findViewById(R.id.iv_list_tile_native_ad_icon);
        NativeAd.Image icon = nativeAd.getIcon();
        if (icon != null) {
            attributionViewSmall.setVisibility(View.VISIBLE);
            attributionViewLarge.setVisibility(View.INVISIBLE);
            iconView.setImageDrawable(icon.getDrawable());
        } else {
            attributionViewSmall.setVisibility(View.INVISIBLE);
            attributionViewLarge.setVisibility(View.VISIBLE);
        }
        nativeAdView.setIconView(iconView);

        TextView headlineView = nativeAdView.findViewById(R.id.tv_list_tile_native_ad_headline);
        headlineView.setText(nativeAd.getHeadline());
        nativeAdView.setHeadlineView(headlineView);

        TextView bodyView = nativeAdView.findViewById(R.id.tv_list_tile_native_ad_body);
        bodyView.setText(nativeAd.getBody());
        bodyView.setVisibility(nativeAd.getBody() != null ? View.VISIBLE : View.INVISIBLE);
        nativeAdView.setBodyView(bodyView);

        nativeAdView.setNativeAd(nativeAd);

        return nativeAdView;
    }
}

/////////////////////////////////////////////////////////////////////////////////////////// //////////////////////////////////

广告布局：

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.gms.ads.nativead.NativeAdView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/tv_list_tile_native_ad_attribution_small"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#F19938"
            android:text="Ad"
            android:textColor="#FFFFFF"
            android:textSize="12sp" />

        <ImageView
            android:id="@+id/iv_list_tile_native_ad_icon"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="16dp"
            android:layout_marginLeft="16dp"
            android:scaleType="fitXY"
            tools:background="#EDEDED" />

        <TextView
            android:id="@+id/tv_list_tile_native_ad_attribution_large"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="16dp"
            android:layout_marginLeft="16dp"
            android:background="#F19938"
            android:gravity="center"
            android:text="Ad"
            android:textColor="#FFFFFF"
            android:visibility="invisible" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="80dp"
            android:layout_marginLeft="80dp"
            android:layout_marginEnd="16dp"
            android:layout_marginRight="16dp"
            android:orientation="vertical">

            <TextView
                android:id="@+id/tv_list_tile_native_ad_headline"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:ellipsize="end"
                android:lines="1"
                android:maxLines="1"
                android:textColor="#000000"
                android:textSize="16sp"
                tools:text="Headline" />

            <TextView
                android:id="@+id/tv_list_tile_native_ad_body"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:ellipsize="end"
                android:lines="1"
                android:maxLines="1"
                android:textColor="#828282"
                android:textSize="14sp"
                tools:text="body" />

        </LinearLayout>

    </FrameLayout>

</com.google.android.gms.ads.nativead.NativeAdView>

Answer 1

关键是用于customOptions原生广告。

\n

所以在 Flutter 中，您可以NativeAd按如下方式初始化：

\n

NativeAd nativeAd = NativeAd(\n  adUnitId: adUnitId,\n  factoryId: factoryId,\n  request: AdRequest(),\n  listener: NativeAdListener(\n    onAdLoaded: (Ad ad) {\n      if(onAdLoaded != null) { onAdLoaded(); }\n    },\n    onAdFailedToLoad: (ad, error) {\n      ad.dispose();\n    },\n  ),\n  customOptions: {\n    \xe2\x80\x98darkMode\xe2\x80\x99: isDarkMode,\n  }\n);\n

\n

然后在Java中，你可以使用这样的东西（初始化之后headlineView）：

\n

Boolean darkMode = (Boolean) customOptions.get(\xe2\x80\x9cdarkMode\xe2\x80\x9d);\nif (darkMode == null) { darkMode = false; }\nheadlineView.setTextColor(Color.parseColor(darkMode ? \xe2\x80\x9c#FFFFFF\xe2\x80\x9d : \xe2\x80\x9c#000000\xe2\x80\x9d));\n

\n

如果我误解了这个问题或者您需要更多信息，请告诉我！

\n