Android中ConnectivityManager.TYPE_MOBILE已废弃，如何修改网络检测代码？

原代码中使用的ConnectivityManager.TYPE_MOBILE、TYPE_WIFI以及getNetworkInfo()方法在Android API 29（Android 10）及以上已被官方废弃，需要改用基于NetworkCapabilities的新API来实现网络连接检测，同时兼容旧版本系统。

修改后的完整代码 #

package com.aniketjain.weatherapp.network;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.os.Build;

public class InternetConnectivity {
    public static boolean isInternetConnected(Context context) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        
        if (connectivityManager == null) {
            return false;
        }

        // Android 10及以上版本的检测逻辑
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            Network activeNetwork = connectivityManager.getActiveNetwork();
            if (activeNetwork == null) {
                return false;
            }
            NetworkCapabilities networkCapabilities = connectivityManager.getNetworkCapabilities(activeNetwork);
            return networkCapabilities != null && 
                   (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
                    || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
                    || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET));
        } 
        // Android 5.0到Android 9的兼容逻辑
        else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Network activeNetwork = connectivityManager.getActiveNetwork();
            if (activeNetwork == null) {
                return false;
            }
            NetworkCapabilities networkCapabilities = connectivityManager.getNetworkCapabilities(activeNetwork);
            return networkCapabilities != null && 
                   (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
                    || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
                    || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET));
        } 
        // Android 5.0以下的兜底逻辑（已废弃API仅作为兼容）
        else {
            return connectivityManager.getActiveNetworkInfo() != null && connectivityManager.getActiveNetworkInfo().isConnected();
        }
    }
}

关键修改说明 #

• 替换废弃常量：用NetworkCapabilities.TRANSPORT_CELLULAR替代TYPE_MOBILE，TRANSPORT_WIFI替代TYPE_WIFI，同时新增TRANSPORT_ETHERNET支持以太网连接检测，覆盖更多网络场景
• 版本适配逻辑：
  • API 29+：通过getActiveNetwork()获取当前活跃网络，再调用getNetworkCapabilities()判断网络传输类型
  • API 21-28：使用NetworkCapabilities的兼容逻辑，避免直接调用已废弃方法
  • API 20及以下：保留getActiveNetworkInfo()作为兜底，确保旧版本系统的兼容性
• 空值安全处理：增加了ConnectivityManager、Network、NetworkCapabilities的空值判断，避免运行时空指针异常

必要权限 #

确保在AndroidManifest.xml中添加网络状态权限：

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

内容的提问来源于stack exchange，提问作者Airat72