[移动开发]Android以太网关闭与开启

网上最多的参考就是
https://www.yuque.com/huangxiaowei-2hqfi/zzlhpw/zusfgr

但是这两种方法并不可行，经过查看系统源码发现，需要调用如下方法

public void setEthernet2(boolean isopen) {
        Class<?> emClass = null;
        try {
            emClass = Class.forName("android.net.EthernetManager");
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Object emInstance = getSystemService("ethernet");
        Method methodSetEthEnabled = null;
        Log.d(TAG, "setEthernet2:emInstance: " + emInstance);
        try {
            methodSetEthEnabled = emClass.getMethod("setEthernetEnabled", Boolean.TYPE);
        } catch (NoSuchMethodException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        methodSetEthEnabled.setAccessible(true);
        try {
            // new Boolean(true) to enable, new Boolean(false) to disable
            Boolean state = (Boolean) methodSetEthEnabled.invoke(emInstance, new Boolean(isopen));
            Log.d(TAG, "setEthernet2: state:" + state);
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

同时需要系统签名之后才能正常开启，网上查找如何签名
在mannifest中，添加
 android:sharedUserId="android.uid.system"

 <uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CONNECTIVITY_INTERNAL"/>
另外如果需要监听以太网，注册广播监听，广播接受者的过滤器如下：
new IntentFilter("android.net.ethernet.ETHERNET_STATE_CHANGED")