安卓(Android)網路管理工具

判斷使用的網路型別、網路狀態判斷、以及可根據優先順序自動切換到實際可以上外網的網路通道

本文連線：https://www.cnblogs.com/muphy/p/15620772.html

適用於以下需求：

1.物聯網開發，為了滿足網路可靠性，對安卓應用設定了多網口上網，WIFI或者乙太網+4G網

2.當使用蜂窩網(4G)時限制資料上傳頻率，乙太網或者WIFI網路不限制

3.需要確保連線上的乙太網或者WIFI是否真的可以上外網，網路存在但不可以上網時繫結蜂窩網(4G)上網

NetWorkUtils.java

//package me.muphy.util;

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

import androidx.annotation.RequiresApi;

import java.util.ArrayList;
import java.util.List;
 
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class NetWorkUtils {

    public static final String TAG = NetWorkUtils.class.getSimpleName();
    public static volatile boolean isActivityConnected = true;
    
 
public static volatile boolean isConnected = true;
    private static ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public static List<NetworkCapabilities> getAllNetworkCapabilities() {
        ConnectivityManager connectivityManager = (ConnectivityManager) ContextHolder.getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
        Network[] networks = connectivityManager.getAllNetworks();
        List<NetworkCapabilities> list = new ArrayList<>();
        for (Network network : networks) {
            NetworkCapabilities capabilities = connectivityManager.getNetworkCapabilities(network);
            list.add(capabilities);
        }
        return list;
    }

    public static String getNetworkName(int transportType) {
        if (transportType == NetworkCapabilities.TRANSPORT_WIFI) {
            return "WIFI";
        } else if (transportType == NetworkCapabilities.TRANSPORT_CELLULAR) {
            return "蜂窩網路";
        } else if (transportType == NetworkCapabilities.TRANSPORT_ETHERNET) {
            return "乙太網";
        } else {
            return "其他網路";
        }
    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public static int getTransportType(NetworkCapabilities networkCapabilities) {
        if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
            return NetworkCapabilities.TRANSPORT_WIFI;
            //post(NetType.WIFI);
        } else if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
            return NetworkCapabilities.TRANSPORT_CELLULAR;
            //post(NetType.CMWAP);
        } else if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) {
            return NetworkCapabilities.TRANSPORT_ETHERNET;
            //post(NetType.AUTO);
        }
        return -1;
    }

    //乙太網連上但不能上外網時，程式已經綁定了蜂窩網通道上網，此方法判斷是否實際使用蜂窩網上網
    public static boolean isRealCellular() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            boolean activityCellular = isActivityCellular();
            if (activityCellular) {
                return true;
            }
            return !isActivityConnected;
        }
        return true;
    }

    //判斷啟用的網（預設網路）是否4G網
    @RequiresApi(api = Build.VERSION_CODES.M)
    public static boolean isActivityCellular() {
        boolean isCellular = (getTransportType() == NetworkCapabilities.TRANSPORT_CELLULAR);
        return isCellular;
    }

    public static boolean isCellular(int transportType) {
        boolean isCellular = (transportType == NetworkCapabilities.TRANSPORT_CELLULAR);
        return isCellular;
    }

    //判斷啟用的網（預設網路）是否4G網
    @RequiresApi(api = Build.VERSION_CODES.M)
    public static boolean isActivityWifi() {
        boolean isWifi = (getTransportType() == NetworkCapabilities.TRANSPORT_WIFI);
        return isWifi;
    }

    public static boolean isWifi(int transportType) {
        boolean isWifi = (transportType == NetworkCapabilities.TRANSPORT_WIFI);
        return isWifi;
    }

    //判斷啟用的網（預設網路）是否4G網
    @RequiresApi(api = Build.VERSION_CODES.M)
    public static boolean isActivityEthernet() {
        boolean isEthernet = (getTransportType() == NetworkCapabilities.TRANSPORT_ETHERNET);
        return isEthernet;
    }

    public static boolean isEthernet(int transportType) {
        boolean isEthernet = (transportType == NetworkCapabilities.TRANSPORT_ETHERNET);
        return isEthernet;
    }

    @RequiresApi(api = Build.VERSION_CODES.M)
    public static int getTransportType() {
        int transportType = -2;
        ConnectivityManager connectivityManager = (ConnectivityManager) ContextHolder.getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
        Network activeNetwork = connectivityManager.getActiveNetwork();
        if (activeNetwork == null) {
            isConnected = false;
        } else {
            NetworkCapabilities networkCapabilities = connectivityManager.getNetworkCapabilities(activeNetwork);
            if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)) {
                isConnected = true;
                transportType = getTransportType(networkCapabilities);
            } else {
                isConnected = false;
            }
        }
        return transportType;
    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public static void requestNetwork() {
        final ConnectivityManager connectivityManager = (ConnectivityManager) ContextHolder.getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkRequest.Builder builder = new NetworkRequest.Builder();
        builder.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
        builder.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
        NetworkRequest networkRequest = builder.build();
        ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
            @Override
            public void onAvailable(Network network) {
                if (Build.VERSION.SDK_INT >= 23) {
                    connectivityManager.bindProcessToNetwork(network);
                } else {
                    // 23後這個方法捨棄了
                    ConnectivityManager.setProcessDefaultNetwork(network);
                }
            }
        };
        final boolean[] chanelFlag = {true};
        executorService.scheduleWithFixedDelay(() -> {
            try {
                //網路都沒連線直接返回
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    if (isActivityCellular()) {
                        return;
                    }
                }
                if (!isConnected) {
                    return;
                }
                isActivityConnected = ping();
                if (isActivityConnected) {
                    if (chanelFlag[0]) {
                        return;
                    }
                    chanelFlag[0] = true;
                    //1.乙太網絡可上外網時改為預設優先順序上網
                    if (Build.VERSION.SDK_INT >= 23) {
                        connectivityManager.bindProcessToNetwork(null);
                    } else {
                        ConnectivityManager.setProcessDefaultNetwork(null);
                    }
                    connectivityManager.unregisterNetworkCallback(networkCallback);
                } else if (chanelFlag[0]) {
                    //2.乙太網絡不可上外網時自動切換蜂窩網
                    connectivityManager.requestNetwork(networkRequest, networkCallback);
                    chanelFlag[0] = false;
                }
            } catch (Exception e) {
                e.printStackTrace();
                LogFileUtils.exceptionToFile(e);
            }
        }, 1, 5, TimeUnit.SECONDS);
    }

    // PING命令 使用新程序使用預設網路 不會使用 networkCallback 繫結的通道  用來判斷乙太網或者WiFi是否可上外網非常不錯
    public static boolean ping() {
        Runtime runtime = Runtime.getRuntime();
        try {
            Process p = runtime.exec("ping -c 1 -W 1 www.baidu.com");
            int ret = p.waitFor();
            Log.i(TAG, "Process:" + ret);
            return ret == 0;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
}