我想设计一个应用程序，显示可用的Wi-Fi网络列表，并连接到用户选择的任何网络。
我已经实现了显示扫描结果的部分。现在我想连接到用户从扫描结果列表中选择的特定网络。
我怎么做呢?
当前回答
如果你的设备知道Wifi配置(已经存储)，我们可以跳过火箭科学。只需循环配置，检查SSID是否匹配。如果是，连接并返回。
设置权限:
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
连接:
try {
String ssid = null;
if (wifi == Wifi.PCAN_WIRELESS_GATEWAY) {
ssid = AesPrefs.get(AesConst.PCAN_WIRELESS_SSID,
context.getString(R.string.pcan_wireless_ssid_default));
} else if (wifi == Wifi.KJ_WIFI) {
ssid = context.getString(R.string.remote_wifi_ssid_default);
}
WifiManager wifiManager = (WifiManager) context.getApplicationContext()
.getSystemService(Context.WIFI_SERVICE);
List<WifiConfiguration> wifiConfigurations = wifiManager.getConfiguredNetworks();
for (WifiConfiguration wifiConfiguration : wifiConfigurations) {
if (wifiConfiguration.SSID.equals("\"" + ssid + "\"")) {
wifiManager.enableNetwork(wifiConfiguration.networkId, true);
Log.i(TAG, "connectToWifi: will enable " + wifiConfiguration.SSID);
wifiManager.reconnect();
return null; // return! (sometimes logcat showed me network-entries twice,
// which may will end in bugs)
}
}
} catch (NullPointerException | IllegalStateException e) {
Log.e(TAG, "connectToWifi: Missing network configuration.");
}
return null;
其他回答
如果你的设备知道Wifi配置(已经存储)，我们可以跳过火箭科学。只需循环配置，检查SSID是否匹配。如果是，连接并返回。
设置权限:
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
连接:
try {
String ssid = null;
if (wifi == Wifi.PCAN_WIRELESS_GATEWAY) {
ssid = AesPrefs.get(AesConst.PCAN_WIRELESS_SSID,
context.getString(R.string.pcan_wireless_ssid_default));
} else if (wifi == Wifi.KJ_WIFI) {
ssid = context.getString(R.string.remote_wifi_ssid_default);
}
WifiManager wifiManager = (WifiManager) context.getApplicationContext()
.getSystemService(Context.WIFI_SERVICE);
List<WifiConfiguration> wifiConfigurations = wifiManager.getConfiguredNetworks();
for (WifiConfiguration wifiConfiguration : wifiConfigurations) {
if (wifiConfiguration.SSID.equals("\"" + ssid + "\"")) {
wifiManager.enableNetwork(wifiConfiguration.networkId, true);
Log.i(TAG, "connectToWifi: will enable " + wifiConfiguration.SSID);
wifiManager.reconnect();
return null; // return! (sometimes logcat showed me network-entries twice,
// which may will end in bugs)
}
}
} catch (NullPointerException | IllegalStateException e) {
Log.e(TAG, "connectToWifi: Missing network configuration.");
}
return null;
这是一个你可以子类化的活动，以强制连接到特定的wifi: https://github.com/zoltanersek/android-wifi-activity/blob/master/app/src/main/java/com/zoltanersek/androidwifiactivity/WifiActivity.java
你需要子类化这个活动并实现它的方法:
public class SampleActivity extends WifiBaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
protected int getSecondsTimeout() {
return 10;
}
@Override
protected String getWifiSSID() {
return "WifiNetwork";
}
@Override
protected String getWifiPass() {
return "123456";
}
}
在API级别29中，WifiManager.enableNetwork()方法已弃用。根据Android API文档(点击这里查看):
请参阅WifiNetworkSpecifier.Builder#build()了解触发连接到Wi-Fi网络的新机制。 参见addnetworkrecommendations (java.util.List)， removenetworkrecommendations (java.util.List)获取添加Wi-Fi的新API 当自动连接到wifi时，考虑网络。兼容性 注意:对于以Build.VERSION_CODES为目标的应用程序。Q或以上，这个 API总是返回false。
从API级别29开始，要连接到WiFi网络，您将需要使用WifiNetworkSpecifier。您可以在https://developer.android.com/reference/android/net/wifi/WifiNetworkSpecifier.Builder.html#build(上找到示例代码)
我也试着连接到网络。 以上提出的解决方案都不适用于hugerock t70。 wifiManager.disconnect()函数;不断开当前网络。 Аnd因此不能重新连接到指定的网络。 我修改了上面的代码。 对我来说，代码bolow工作完美:
String networkSSID = "test";
String networkPass = "pass";
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"" + networkSSID + "\"";
conf.wepKeys[0] = "\"" + networkPass + "\"";
conf.wepTxKeyIndex = 0;
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
conf.preSharedKey = "\""+ networkPass +"\"";
WifiManager wifiManager =
(WifiManager)context.getSystemService(Context.WIFI_SERVICE);
int networkId = wifiManager.addNetwork(conf);
wifi_inf = wifiManager.getConnectionInfo();
/////important!!!
wifiManager.disableNetwork(wifi_inf.getNetworkId());
/////////////////
wifiManager.enableNetwork(networkId, true);
在连接WIFI网络之前，您需要检查WIFI网络的安全类型ScanResult类有一个功能。该字段提供网络类型
参考:https://developer.android.com/reference/android/net/wifi/ScanResult.html功能
有三种类型的WIFI网络。
首先，实例化一个wificconfiguration对象并填写网络的SSID(注意它必须用双引号括起来)，将初始状态设置为禁用，并指定网络的优先级(40左右的数字似乎工作得很好)。
WifiConfiguration wfc = new WifiConfiguration();
wfc.SSID = "\"".concat(ssid).concat("\"");
wfc.status = WifiConfiguration.Status.DISABLED;
wfc.priority = 40;
现在是更复杂的部分:我们需要填充wiificconfiguration的几个成员来指定网络的安全模式。 对于开放网络。
wfc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
wfc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
wfc.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
wfc.allowedAuthAlgorithms.clear();
wfc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
wfc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
对于使用WEP的网络;注意WEP密钥也包含在双引号中。
wfc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
wfc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
wfc.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
wfc.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
wfc.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
wfc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
wfc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
if (isHexString(password)) wfc.wepKeys[0] = password;
else wfc.wepKeys[0] = "\"".concat(password).concat("\"");
wfc.wepTxKeyIndex = 0;
对于使用WPA和WPA2的网络，我们可以为其中任何一个设置相同的值。
wfc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
wfc.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
wfc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
wfc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
wfc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
wfc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
wfc.preSharedKey = "\"".concat(password).concat("\"");
最后，我们可以将该网络添加到WifiManager的已知列表中
WifiManager wfMgr = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
int networkId = wfMgr.addNetwork(wfc);
if (networkId != -1) {
// success, can call wfMgr.enableNetwork(networkId, true) to connect
}
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