Android 12 Wifi 开发(获取列表连接断开连接)
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获取Wifi列表:
扫描(这个方法早在android 9.0 就被弃用),不过如果不调用的话是没法及时获取Wifi列表的广播的。(不需要也能正常获取,没有延迟,经实验毫无区别)
public static void searchWifiList(WifiManager manager)
manager.startScan();
创建广播并接收:
/**
* 获取附近的WiFi列表
*
* @param manager WifiManager
* @param flag 是否保留重名但BSSID不同的wifi true保留,false不保留
* @return wifi列表
*/
public static List<ScanResult> scanResults(WifiManager manager, boolean flag)
List<ScanResult> scanResults = new ArrayList<>();
HashSet<String> hs = new HashSet<>();
Log.d("WifiUtils", "scanResults: " + manager.getScanResults().size());
if (flag)
scanResults = manager.getScanResults();
return scanResults;
for (ScanResult scanResult : manager.getScanResults())
if (hs.add(scanResult.SSID))
scanResults.add(scanResult);
return scanResults;
private final BroadcastReceiver receiver = new BroadcastReceiver()
@Override
public void onReceive(Context context, Intent intent)
if (intent.getAction().equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION))
Log.d("WifiFragment", "onReceive: 刷新数据");
results = WifiUtils.scanResults(manager, true);
mainBinding.scanResult.getAdapter().notifyDataSetChanged();
else if (intent.getAction().equals(WifiManager.WIFI_STATE_CHANGED_ACTION))
int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
switch (wifiState)
case WifiManager.WIFI_STATE_DISABLED:
Log.d("WifiFragment", "onReceive: wifi 关闭");
mainBinding.switchWifi.setText("已停用");
results = new ArrayList<>();
mainBinding.scanResult.getAdapter().notifyDataSetChanged();
break;
case WifiManager.WIFI_STATE_DISABLING:
case WifiManager.WIFI_STATE_ENABLING:
case WifiManager.WIFI_STATE_UNKNOWN:
break;
case WifiManager.WIFI_STATE_ENABLED:
Log.d("WifiFragment", "onReceive: wifi 打开");
mainBinding.switchWifi.setText("已启用");
break;
;
配置并连接(无系统签名):
/**
* 创建连接
* @param manager WifiManager
* @param ssid Wifi名称
* @param bssid 唯一标识(可以为空)
* @param passwd 密码 (当前网络是开放网络时,可以为空)
* @param isHidden 是否是隐藏网络
* @param capabilities 安全协议(根据协议选择连接方式)
*/
@RequiresApi(api = Build.VERSION_CODES.Q)
public static void connectWifiForQ(WifiManager manager, String ssid, String bssid, String passwd, boolean isHidden, String capabilities)
if (capabilities.contains("WPA-PSK") || capabilities.contains("WPA2-PSK"))
setWPA2ForQ(manager, ssid, bssid, passwd, isHidden);
else
setESSForQ(manager, ssid, isHidden);
// WPA2-PSK
@RequiresApi(api = Build.VERSION_CODES.Q)
public static int setWPA2ForQ(WifiManager manager, String ssid, String bssid, String passwd, boolean isHidden)
WifiNetworkSuggestion suggestion;
if (bssid == null)
suggestion= new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setWpa2Passphrase(passwd)
.setIsHiddenSsid(isHidden)
.build();
else
suggestion= new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setBssid(MacAddress.fromString(bssid))
.setWpa2Passphrase(passwd)
.setIsHiddenSsid(isHidden)
.build();
List<WifiNetworkSuggestion> suggestions = new ArrayList<>();
suggestions.add(suggestion);
int status = manager.addNetworkSuggestions(suggestions);
if (status != WifiManager.STATUS_NETWORK_SUGGESTIONS_SUCCESS)
// 连接失败
Log.d("WifiUtils", "setWPA2ForQ: 添加失败");
else
Log.d("WifiUtils", "setWPA2ForQ: 添加成功");
return status;
// ESS
@RequiresApi(api = Build.VERSION_CODES.Q)
public static int setESSForQ(WifiManager manager, String ssid, boolean isHidden)
WifiNetworkSuggestion suggestion = new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setIsHiddenSsid(isHidden)
.build();
List<WifiNetworkSuggestion> suggestions = new ArrayList<>();
suggestions.add(suggestion);
int status = manager.addNetworkSuggestions(suggestions);
if (status != WifiManager.STATUS_NETWORK_SUGGESTIONS_SUCCESS)
// 连接失败
Log.d("WifiUtils", "setWPA2ForQ: 添加失败");
else
Log.d("WifiUtils", "setWPA2ForQ: 添加成功");
return status;
配置并连接(有系统签名):
/**
* 连接wifi
*
* @param manager WifiManager
* @param configuration Wifi配置
* @return 是否连接成功
*/
public static boolean connectWifi(WifiManager manager, WifiConfiguration configuration)
int id = manager.addNetwork(configuration);
WifiInfo connectionInfo = manager.getConnectionInfo();
manager.disableNetwork(connectionInfo.getNetworkId());
boolean b = manager.enableNetwork(id, true);
Log.d("WifiManagerUtils", "connectWifi: 连接状态=" + b);
if (b)
manager.saveConfiguration();
else
Log.d("WifiManagerUtils", configuration.toString());
return b;
/**
* 创建Wifi配置
*
* @param SSID wifi名称
* @param password wifi密码
* @param hidden 网络是否隐藏(该方法与添加隐藏网络通用)
* @param capabilities 网络安全协议
* @return 配置好的wifi
*/
public static WifiConfiguration createWifiInfo(String SSID, String password, boolean hidden, String capabilities)
WifiConfiguration configuration = new WifiConfiguration();
configuration.SSID = "\\"" + SSID + "\\"";
if (hidden)
configuration.hiddenSSID = true;
Log.d("WifiManagerUtils", "createWifiInfo: " + capabilities);
if (capabilities.contains("SAE") && Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
setWPA3(configuration, password);
else if (capabilities.contains("WPA-PSK") || capabilities.contains("WPA2-PSK"))
setWPA(configuration, password);
else if (capabilities.contains("WEP"))
setWEP(configuration, password);
else
setESS(configuration);
return configuration;
/**
* 设置wpa3协议
*
* @param configuration 配置
* @param password 密码
*/
public static void setWPA3(WifiConfiguration configuration, String password)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.SAE);
configuration.preSharedKey = "\\"" + password + "\\"";
/**
* WPA协议
*
* @param configuration 配置
* @param password 密码
*/
public static void setWPA(WifiConfiguration configuration, String password)
configuration.preSharedKey = "\\"" + password + "\\"";
//公认的IEEE 802.11验证算法。
configuration.allowedAuthAlgorithms.clear();
configuration.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
//公认的的公共组密码。
configuration.allowedGroupCiphers.clear();
configuration.allowedGroupCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
configuration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
//公认的密钥管理方案。
configuration.allowedKeyManagement.clear();
configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
//密码为WPA。
configuration.allowedPairwiseCiphers.clear();
configuration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
configuration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
//公认的安全协议。
configuration.allowedProtocols.clear();
configuration.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
/**
* WEP协议
*
* @param configuration 配置
* @param password 密码
*/
public static void setWEP(WifiConfiguration configuration, String password)
configuration.wepKeys[0] = "\\"" + password + "\\"";
configuration.wepTxKeyIndex = 0;
configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
configuration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
/**
* 无密码
*
* @param configuration 配置
*/
public static void setESS(WifiConfiguration configuration)
configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
断开连接(无系统签名):
//Android11及以上可以使用,清除建议列表,可以断开当前的网络
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
List<WifiNetworkSuggestion> networkSuggestions = wifiManager.getNetworkSuggestions();
wifiManager.removeNetworkSuggestions(networkSuggestions);
监听连接状态:
//监听网络连接状态
connectivityManager.registerDefaultNetworkCallback(new ConnectivityManager.NetworkCallback()
@Override
public void onAvailable(@NonNull Network network)
super.onAvailable(network);
Log.d("MainActivity", "onAvailable: 网络已连接");
Toast.makeText(MainActivity.this, "已连接网络", Toast.LENGTH_SHORT).show();
@Override
public void onUnavailable()
super.onUnavailable();
Log.d("MainActivity", "onUnavailable: 网络已断开");
Toast.makeText(MainActivity.this, "已断开网络", Toast.LENGTH_SHORT).show();
);
注意事项:
断开当前Wifi后,再重新连接该Wifi,可能会出现无法连接的情况。
这种情况我是通过关闭Wifi后再重新打开解决的,但是对Wifi的开关控制要涉及到权限问题——
需要System权限,在Manifest中添加:
android:sharedUserId="android.uid.system"
然后需要系统签名,可在系统源码中获得。
不知道各位有没有什么好的解决方法。
项目地址:
有系统签名(推荐)——
https://github.com/Ouanu/WIFI_DEMOhttps://github.com/Ouanu/WIFI_DEMO无系统签名——
https://github.com/Ouanu/WifiDemohttps://github.com/Ouanu/WifiDemo
不需系统签名的方法(需要root):
步骤如下——
1、在/data目录下创建一个文本,用来标识Wifi是打开或者关闭状态,比如:
文本文件名字:node
内容:0 // (0是关,1是开)
2、chmod 666 /data/node (赋予该文件的读写权限)
3、创建循环检测该文件内容的脚本,并针对内容执行adb命令
adb shell svc wifi enable // 开启WIFI
adb shell svc wifi disable // 关闭WIFI
4、应用端(App)对该文本进行读写
即可实现不需系统签名也可控制WIFI模块的开关
Android 获取连接WiFi和蓝牙名称
一、获取WiFi名称:
//获取连接的wifi名称
public String getConnectWifiSsid() {
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
//获取wifi信号强度
rssi = wifiInfo.getRssi();
String wifiid = wifiInfo.getSSID().replace("\\"", "").replace("\\"", "");
MyLog.getInstance().PrintLog(TAG, "ssid======" + wifiid);
MyLog.getInstance().PrintLog(TAG, "rssi======" + rssi);
return wifiid;
}
根据信号强度设置wifi格数图片
if (rssi >= -55) {
//满格信号
image_wifi.setImageDrawable(ContextCompat.getDrawable(activity, R.mipmap.wifi4));
} else if (rssi < -55 && rssi >= -70) {
//三格信号
image_wifi.setImageDrawable(ContextCompat.getDrawable(activity, R.mipmap.wifi3));
} else if (rssi < -70 && rssi >= -85) {
//二格信号
image_wifi.setImageDrawable(ContextCompat.getDrawable(activity, R.mipmap.wifi2));
} else if (rssi < -85&& rssi >= -100) {
//一格信号
image_wifi.setImageDrawable(ContextCompat.getDrawable(activity, R.mipmap.wifi1));
}
二、获取蓝牙名称:
添加蓝牙权限:
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
//获取连接的蓝牙名称
public String getConnectedBtDevice() {
//获取蓝牙适配器
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
//得到已匹配的蓝牙设备列表
Set<BluetoothDevice> bondedDevices = bluetoothAdapter.getBondedDevices();
if (bondedDevices != null && bondedDevices.size() > 0) {
for (BluetoothDevice bondedDevice : bondedDevices) {
try {
//使用反射调用被隐藏的方法
Method isConnectedMethod = BluetoothDevice.class.getDeclaredMethod("isConnected", (Class[]) null);
isConnectedMethod.setAccessible(true);
boolean isConnected = (boolean) isConnectedMethod.invoke(bondedDevice, (Object[]) null);
MyLog.getInstance().PrintLog(TAG, "isConnected:" + isConnected);
if (isConnected) {
return bondedDevice.getName();
}
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
return null;
}
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
//判断蓝牙功能是否存在
if (mBluetoothAdapter == null) {
showToest("该设备不支持蓝牙");
return;
}
//获取名字 MAC地址
String name = mBluetoothAdapter.getName();
String address = mBluetoothAdapter.getAddress();
Log.i(TAG, "蓝牙名: "+name+"mac地址:"+address);
//获取蓝牙的状态
int state = mBluetoothAdapter.getState();
switch (state){
case BluetoothAdapter.STATE_ON:
showToest("蓝牙已经打开");
Log.i(TAG, "蓝牙已经打开 ");
break;
case BluetoothAdapter.STATE_OFF:
showToest("蓝牙已经关闭");
Log.i(TAG, "蓝牙已经关闭 ");
break;
case BluetoothAdapter.STATE_TURNING_OFF:
showToest("蓝牙正在关闭");
Log.i(TAG, "蓝牙正在关闭 ");
break;
case BluetoothAdapter.STATE_TURNING_ON:
showToest("蓝牙正在打开");
Log.i(TAG, "蓝牙正在打开 ");
break;
default:
break;
}
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