Android通过WiFi编程连接设备

要通过WiFi编程连接Android设备，可以使用以下步骤：

1. 添加WiFi权限到AndroidManifest.xml文件中：

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

2. 在Android应用程序中创建一个WiFi连接类，用于连接到特定的WiFi网络：

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

public class WiFiConnector {
    private static final String TAG = "WiFiConnector";
    private Context mContext;
    private WifiManager mWifiManager;
    private ConnectivityManager.NetworkCallback mNetworkCallback;

    public WiFiConnector(Context context) {
        mContext = context;
        mWifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
    }

    public void connectToWiFi(String ssid, String password) {
        if (mWifiManager.isWifiEnabled()) {
            connectToNetwork(ssid, password);
        } else {
            enableWiFiAndConnect(ssid, password);
        }
    }

    private void enableWiFiAndConnect(final String ssid, final String password) {
        WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
        if (wifiManager != null) {
            wifiManager.setWifiEnabled(true);
            mNetworkCallback = new ConnectivityManager.NetworkCallback() {
                @Override
                public void onAvailable(Network network) {
                    super.onAvailable(network);
                    connectToNetwork(ssid, password);
                    mContext.getSystemService(ConnectivityManager.class).unregisterNetworkCallback(mNetworkCallback);
                }
            };

            ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
                @Override
                public void onAvailable(Network network) {
                    super.onAvailable(network);
                    connectToNetwork(ssid, password);
                    mContext.getSystemService(ConnectivityManager.class).unregisterNetworkCallback(this);
                }
            };

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                ConnectivityManager connectivityManager = mContext.getSystemService(ConnectivityManager.class);
                NetworkRequest.Builder builder = new NetworkRequest.Builder();
                connectivityManager.requestNetwork(builder.build(), networkCallback);
            } else {
                wifiManager.setWifiEnabled(true);
                wifiManager.reconnect();
            }
        }
    }

    private void connectToNetwork(String ssid, String password) {
        WifiConfiguration wifiConfig = new WifiConfiguration();
        wifiConfig.SSID = "\"" + ssid + "\"";
        wifiConfig.preSharedKey = "\"" + password + "\"";
        wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
        int netId = mWifiManager.addNetwork(wifiConfig);
        mWifiManager.disconnect();
        mWifiManager.enableNetwork(netId, true);
        mWifiManager.reconnect();
    }
}

3. 在你的Activity或者Fragment中，实例化WiFiConnector类，并调用connectToWiFi方法连接到WiFi网络：

WiFiConnector wiFiConnector = new WiFiConnector(this);
wiFiConnector.connectToWiFi("SSID", "password");

请注意，这只是一个简单的示例，仅用于连接到WiFi网络。在实际的应用中，你可能会添加错误处理，以及其他相关功能。