我想以编程方式连接Wifi。我在旧设备（4年前购买）上做了一些测试，它运行良好。但是，当我在模拟器（Android 8.1.0，API 27）上进行了一些测试时，该测试无法正常工作。你有解释吗？ （实际上，我可以看到我的wifi已保存在设置的已保存网络中，但设备未连接到wifi） 这是我的代码（基本上是我从堆栈溢出问题How do I connect to a specific Wi-Fi network in Android programmatically?的答案中复制来的）：
findViewById(R.id.connect_to_wifi).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Thread connectionThread = new Thread(new Runnable() {
@Override
public void run() {
wifiManager.setWifiEnabled(true);
String ssid = ((TextView)findViewById(R.id.wifi_name)).getText().toString();
String key = ((TextView)findViewById(R.id.wifi_password)).getText().toString();
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = String.format("\"%s\"", ssid);
conf.status = WifiConfiguration.Status.ENABLED;
conf.priority = 40;
//wifiConfig.preSharedKey = String.format("\"%s\"", key);
if (((EditText)findViewById(R.id.encryption)).getText().toString().equals("WEP")) {
Log.v("rht", "Configuring WEP");
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
conf.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
conf.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
conf.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
conf.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
if (key.matches("^[0-9a-fA-F]+$")) {
conf.wepKeys[0] = key;
} else {
conf.wepKeys[0] = "\"".concat(key).concat("\"");
}
conf.wepTxKeyIndex = 0;
} else if (((EditText)findViewById(R.id.encryption)).getText().toString().contains("WPA")) {
Log.v("rht", "Configuring WPA");
conf.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
conf.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
conf.preSharedKey = "\"" + key + "\"";
} else {
Log.v("rht", "Configuring OPEN network");
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
conf.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
conf.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
conf.allowedAuthAlgorithms.clear();
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
}
int netId = wifiManager.addNetwork(conf);
wifiManager.disconnect();
wifiManager.enableNetwork(netId, true);
wifiManager.reconnect();
}
});
connectionThread.start();
}
});
这是日志：
09-04 09:16:34.348 7410-8091/amiin.bazouk.application.com.localisationdemo V/rht: Configuring WPA
09-04 09:16:34.352 1725-2739/system_process I/WifiService: addOrUpdateNetwork uid=10079
09-04 09:16:34.352 1725-2739/system_process I/addOrUpdateNetwork: uid = 10079 SSID "partner" nid=-1
09-04 09:16:34.357 1725-2497/system_process I/WifiService: getConfiguredNetworks uid=10014
09-04 09:16:34.377 1725-2041/system_process D/WifiConfigStore: Writing to stores completed in 21 ms.
09-04 09:16:34.381 1725-2497/system_process I/WifiService: disconnect uid=10079
09-04 09:16:34.383 7831-7831/? E/wpa_supplicant: nl80211: Failed to open /proc/sys/net/ipv4/conf/wlan0/drop_unicast_in_l2_multicast: No such file or directory
nl80211: Failed to set IPv4 unicast in multicast filter
09-04 09:16:34.384 1725-2497/system_process I/WifiService: enableNetwork uid=10079 disableOthers=true
09-04 09:16:34.391 1397-3075/? W/audio_hw_generic: Hardware backing HAL too slow, could only write 0 of 720 frames
09-04 09:16:34.393 1725-2041/system_process D/WifiStateMachine: connectToUserSelectNetwork netId 8, uid 10079, forceReconnect = false
09-04 09:16:34.396 1725-2739/system_process I/WifiService: getConfiguredNetworks uid=10014
09-04 09:16:34.405 1397-3075/? W/audio_hw_generic: Hardware backing HAL too slow, could only write 0 of 720 frames
09-04 09:16:34.421 1397-3075/? W/audio_hw_generic: Hardware backing HAL too slow, could only write 0 of 720 frames
09-04 09:16:34.439 1725-2041/system_process D/WifiConfigStore: Writing to stores completed in 27 ms.
09-04 09:16:34.439 1725-2041/system_process E/WifiConfigManager: UID 10079 does not have permission to update configuration "partner"WPA_PSK
09-04 09:16:34.439 1725-2041/system_process I/WifiStateMachine: connectToUserSelectNetwork Allowing uid 10079 with insufficient permissions to connect=8
09-04 09:16:34.440 1725-2041/system_process D/WifiStateMachine: CMD_START_CONNECT sup state DisconnectedState my state DisconnectedState nid=8 roam=false
09-04 09:16:34.443 1725-2497/system_process I/WifiService: reconnect uid=10079
09-04 09:16:34.446 1562-1562/? E/wificond: Received error messsage: Operation not supported on transport endpoint
NL80211_CMD_ABORT_SCAN failed
09-04 09:16:34.446 1562-1562/? W/wificond: Abort scan failed
09-04 09:16:34.447 1725-2041/system_process D/SupplicantStaIfaceHal: connectToNetwork "partner"WPA_PSK
Network is already saved, will not trigger remove and add operation.
09-04 09:16:34.699 1725-2497/system_process D/WificondControl: Scan result ready event
09-04 09:16:34.715 1725-2041/system_process W/WifiConfigManager: Looking up network with invalid networkId -1
答案 0 :(得分：0)
conf.BSSID conf.SSID和conf.preSharedKey之前和之后加上双引号（“），如果缺少。答案 1 :(得分：0)
Android 8.1+不会直接连接到wifi，首先在运行时为COURSE_LOCATION添加权限，然后它将连接