Android应用开发有时候会有应用直连app的需求，由于Android系统 api会时常变动，wifi连接api亦如此，Android10以下直接使用：
（图片来源网络，侵删）
WifiConfiguration configured = isExist(ssid);
if (configured != null) {
//在配置表中找到了，直接连接
isSuccess = wifiManager.enableNetwork(configured.networkId, true);
} else {
WifiConfiguration wifiConfig = createWifiConfig(ssid, password, getCipherType(scanResult.getCapabilities()));
int netId = wifiManager.addNetwork(wifiConfig);
isSuccess = wifiManager.enableNetwork(netId, true);
}
Android 10以上则可以使用
WifiNetworkSpecifier wifiNetworkSpecifier = new WifiNetworkSpecifier.Builder()
.setSsid(ssid)
.setWpa2Passphrase(password)
.build();
//网络请求
NetworkRequest request = new NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
.addCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED)
.setNetworkSpecifier(wifiNetworkSpecifier)
.build();
//网络回调处理
ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(@NonNull Network network) {
super.onAvailable(network);
if (wifiConnectCallback != null) {
wifiConnectCallback.onSuccess(network);
Log.d("WifiUtils", "======onAvailable: ====连接成功======");
}
}
@Override
public void onUnavailable() {
super.onUnavailable();
Log.d("WifiUtils", "======onAvailable: ====连接失败======");
if (wifiConnectCallback != null) {
wifiConnectCallback.onFailure();
}
}
};
//连接网络
connectivityManager.requestNetwork(request, networkCallback);
或是WifiNetworkSuggestion 方式
（图片来源网络，侵删）
WifiNetworkSuggestion suggestion = new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setWpa2Passphrase(password)
.setIsAppInteractionRequired(true)
.build();
最后分享工具类
public class ConnectWifiUtils {
private static final String TAG = ConnectWifiUtils.class.getSimpleName();
private final ConnectivityManager connectivityManager;//连接管理者
private final WifiManager wifiManager;//Wifi管理者
private WifiConnectCallback wifiConnectCallback;
@SuppressLint("StaticFieldLeak")
private static volatile ConnectWifiUtils mInstance;
private final Context mContext;
public ConnectWifiUtils(Context context) {
mContext = context;
wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
connectivityManager = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
}
public static ConnectWifiUtils initialize(Context context) {
if (mInstance == null) {
synchronized (ConnectWifiUtils.class) {
if (mInstance == null) {
mInstance = new ConnectWifiUtils(context);
}
}
}
return mInstance;
}
public void setWifiConnectCallback(WifiConnectCallback wifiConnectCallback) {
this.wifiConnectCallback = wifiConnectCallback;
}
/**
* 连接Wifi
*
* @param scanResult 扫描结果
* @param password 密码
*/
public void connectWifi(WifiBean scanResult, String password) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
connectBySug(scanResult.getWifiName(), password);
} else {
connectByOld(scanResult, password);
}
}
/**
* Android 10 以下使用
*
* @param scanResult 扫描结果
* @param password 密码
*/
private void connectByOld(WifiBean scanResult, String password) {
String ssid = scanResult.getWifiName();
boolean isSuccess;
WifiConfiguration configured = isExist(ssid);
if (configured != null) {
//在配置表中找到了，直接连接
isSuccess = wifiManager.enableNetwork(configured.networkId, true);
} else {
WifiConfiguration wifiConfig = createWifiConfig(ssid, password, getCipherType(scanResult.getCapabilities()));
int netId = wifiManager.addNetwork(wifiConfig);
isSuccess = wifiManager.enableNetwork(netId, true);
}
Log.d(TAG, "connectWifi: " + (isSuccess ? "成功" : "失败"));
}
/**
* Android 10及以上版本使用此方式连接Wifi
*
* @param ssid 名称
* @param password 密码
*/
@SuppressLint("NewApi")
private void connectByNew(String ssid, String password) {
WifiNetworkSpecifier wifiNetworkSpecifier = new WifiNetworkSpecifier.Builder()
.setSsid(ssid)
.setWpa2Passphrase(password)
.build();
//网络请求
NetworkRequest request = new NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
.addCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED)
.setNetworkSpecifier(wifiNetworkSpecifier)
.build();
//网络回调处理
ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(@NonNull Network network) {
super.onAvailable(network);
if (wifiConnectCallback != null) {
wifiConnectCallback.onSuccess(network);
Log.d("WifiUtils", "======onAvailable: ====连接成功======");
}
}
@Override
public void onUnavailable() {
super.onUnavailable();
Log.d("WifiUtils", "======onAvailable: ====连接失败======");
if (wifiConnectCallback != null) {
wifiConnectCallback.onFailure();
}
}
};
//请求连接网络
connectivityManager.requestNetwork(request, networkCallback);
}
@SuppressLint("NewApi")
private void connectBySug(String ssid, String password) {
WifiNetworkSuggestion suggestion = new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setWpa2Passphrase(password)
.setIsAppInteractionRequired(true)
.build();
List suggestionList = new ArrayList();
suggestionList.add(suggestion);
int status = wifiManager.addNetworkSuggestions(suggestionList);
if (status != WifiManager.STATUS_NETWORK_SUGGESTIONS_SUCCESS) {
return;
}
Log.d(TAG, "======onReceive: ==网络连接状态=111111111===");
IntentFilter intentFilter = new IntentFilter(WifiManager.ACTION_WIFI_NETWORK_SUGGESTION_POST_CONNECTION);
BroadcastReceiver wifiScanReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.d(TAG, "======onReceive: ==网络连接状态====");
if (!intent.getAction().equals(WifiManager.ACTION_WIFI_NETWORK_SUGGESTION_POST_CONNECTION)) {
return;
}
}
};
mContext.registerReceiver(wifiScanReceiver, intentFilter);
}
/**
* 创建Wifi配置
*
* @param ssid 名称
* @param password 密码
* @param type 类型
*/
private WifiConfiguration createWifiConfig(String ssid, String password, WifiCapability type) {
WifiConfiguration config = new WifiConfiguration();
config.allowedAuthAlgorithms.clear();
config.allowedGroupCiphers.clear();
config.allowedKeyManagement.clear();
config.allowedPairwiseCiphers.clear();
config.allowedProtocols.clear();
config.SSID = "\"" + ssid + "\"";
WifiConfiguration configured = isExist(ssid);
if (configured != null) {
wifiManager.removeNetwork(configured.networkId);
wifiManager.saveConfiguration();
}
//不需要密码的场景
if (type == WifiCapability.WIFI_CIPHER_NO_PASS) {
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
//以WEP加密的场景
} else if (type == WifiCapability.WIFI_CIPHER_WEP) {
config.hiddenSSID = true;
config.wepKeys[0] = "\"" + password + "\"";
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
//以WPA加密的场景，自己测试时，发现热点以WPA2建立时，同样可以用这种配置连接
} else if (type == WifiCapability.WIFI_CIPHER_WPA) {
config.preSharedKey = "\"" + password + "\"";
config.hiddenSSID = true;
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
config.status = WifiConfiguration.Status.ENABLED;
}
return config;
}
/**
* 网络是否连接
*/
@SuppressLint("NewApi")
public static boolean isNetConnected(ConnectivityManager connectivityManager) {
return connectivityManager.getActiveNetwork() != null;
}
/**
* 连接网络类型是否为Wifi
*/
@SuppressLint("NewApi")
public static boolean isWifi(ConnectivityManager connectivityManager) {
if (connectivityManager.getActiveNetwork() == null) {
return false;
}
NetworkCapabilities networkCapabilities = connectivityManager.getNetworkCapabilities(connectivityManager.getActiveNetwork());
if (networkCapabilities != null) {
return false;
}
return networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI);
}
/**
* 配置表是否存在对应的Wifi配置
*
* @param SSID
* @return
*/
@SuppressLint("MissingPermission")
private WifiConfiguration isExist(String SSID) {
List existingConfigs = wifiManager.getConfiguredNetworks();
for (WifiConfiguration existingConfig : existingConfigs) {
if (existingConfig.SSID.equals("\"" + SSID + "\"")) {
return existingConfig;
}
}
return null;
}
private WifiCapability getCipherType(String capabilities) {
if (capabilities.contains("WEB")) {
return WifiCapability.WIFI_CIPHER_WEP;
} else if (capabilities.contains("PSK")) {
return WifiCapability.WIFI_CIPHER_WPA;
} else if (capabilities.contains("WPS")) {
return WifiCapability.WIFI_CIPHER_NO_PASS;
} else {
return WifiCapability.WIFI_CIPHER_NO_PASS;
}
}
/**
* wifi连接回调接口
*/
public interface WifiConnectCallback {
void onSuccess(Network network);
void onFailure();
}
public enum WifiCapability {
WIFI_CIPHER_WEP, WIFI_CIPHER_WPA, WIFI_CIPHER_NO_PASS
}
}
