import ohos.net.NetworkCapabilities;
import ohos.net.NetworkEvent;
import ohos.net.NetworkManager;
import ohos.net.NetworkStateCallback;
import ohos.net.NetworkSpecifier;
import ohos.net.NetworkSpecifier.Builder;
import ohos.net.NetworkSpecifier.CellularSpecifier;

public class CellularSignalInfo {

    public static void main(String[] args) {
        // 创建网络管理器
        NetworkManager networkManager = NetworkManager.getInstance();

        // 创建网络状态回调
        NetworkStateCallback networkStateCallback = new NetworkStateCallback() {
            @Override
            public void onAvailable(Network network) {
                // 当网络可用时触发
                // 获取蜂窝网络信号信息
                getCellularSignalInfo(network);
            }

            @Override
            public void onLost(Network network) {
                // 当网络丢失时触发
            }
        };

        // 注册网络状态回调
        networkManager.registerNetworkCallback(createCellularNetworkSpecifier(), networkStateCallback);
    }

    // 创建蜂窝网络Specifier
    private static NetworkSpecifier createCellularNetworkSpecifier() {
        Builder builder = new CellularSpecifier.Builder();
        return builder.build();
    }

    // 获取蜂窝网络信号信息
    private static void getCellularSignalInfo(Network network) {
        // 获取网络的能力
        NetworkCapabilities capabilities = NetworkManager.getInstance().getNetworkCapabilities(network);

        // 获取蜂窝网络的信号强度等信息
        int signalStrength = capabilities.getSignalStrength();
        // 可以根据需要获取其他蜂窝网络信息

        // 打印信号强度
        System.out.println("蜂窝网络信号强度：" + signalStrength);
    }
}