问题描述
我正在尝试在android 10（api级别29）中连接特定的wifi网络。我已经为此编写了函数，
private void connectToWifi(final String ssid,String password) {
count=0;
wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
if (!wifiManager.isWifiEnabled()){
wifiManager.setWifiEnabled(true);
System.out.println("Wifi is enabled");
}
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
System.out.println("Android sdk version is 29 above");
final WifiNetworkSuggestion suggestion1 =
new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setIsAppInteractionrequired(true) // Optional (Needs location permission)
.build();
final WifiNetworkSuggestion suggestion2 =
new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setWpa2Passphrase(password)
.setIsAppInteractionrequired(true) // Optional (Needs location permission)
.build();
final WifiNetworkSuggestion suggestion3 =
new WifiNetworkSuggestion.Builder()
.setSsid(ssid)
.setWpa3Passphrase(password)
.setIsAppInteractionrequired(true) // Optional (Needs location permission)
.build();
final List<WifiNetworkSuggestion> suggestionsList =
new ArrayList<WifiNetworkSuggestion>();
suggestionsList.add(suggestion1);
suggestionsList.add(suggestion2);
suggestionsList.add(suggestion3);
WifiNetworkSpecifier.Builder builder = new WifiNetworkSpecifier.Builder();
builder.setSsid(ssid);
builder.setWpa2Passphrase(password);
final int status = wifiManager.addNetworkSuggestions(suggestionsList);
if (status != WifiManager.STATUS_NETWORK_SUGGESTIONS_SUCCESS) {
System.out.println("Status:" +status);
// do error handling here…
}
WifiNetworkSpecifier wifiNetworkSpecifier = builder.build();
NetworkRequest.Builder networkRequestBuilder1 = new NetworkRequest.Builder();
networkRequestBuilder1.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
networkRequestBuilder1.setNetworkSpecifier(wifiNetworkSpecifier);
NetworkRequest nr = networkRequestBuilder1.build();
final ConnectivityManager cm = (ConnectivityManager)
getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
final ConnectivityManager.NetworkCallback networkCallback = new
ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(Network network) {
super.onAvailable(network);
Log.d("MainActivity","onAvailable:" + network);
cm.bindProcesstoNetwork(network);
}
@Override
public void onLosing(@NonNull Network network,int maxmsToLive) {
super.onLosing(network,maxmsToLive);
System.out.println("onLosing" + network);
}
@Override
public void onLost(@NonNull Network network) {
super.onLost(network);
System.out.println("onLost" + network);
}
@Override
public void onUnavailable() {
super.onUnavailable();
System.out.println("onUnavaliable");
Toast.makeText(MainActivity.this,"Your Password is incorrect",Toast.LENGTH_SHORT).show();
}
};
cm.requestNetwork(nr,networkCallback);
final IntentFilter intentFilter = new IntentFilter(WifiManager.ACTION_WIFI_NETWORK_SUGGESTION_POST_CONNECTION);
final broadcastReceiver broadcastReceiver = new broadcastReceiver() {
@Override public void onReceive(Context context,Intent intent) {
if (!intent.getAction().equals(WifiManager.ACTION_WIFI_NETWORK_SUGGESTION_POST_CONNECTION)) {
System.out.println("ACTION_WIFI_NETWORK_SUGGESTION_POST_CONNECTION Failed");
return;
}else {
System.out.println("Connection Successful..........");
}
// Post connection
}
};
getApplicationContext().registerReceiver(broadcastReceiver,intentFilter);
} else{
try {
WifiConfiguration wifiConfig = new WifiConfiguration();
wifiConfig.SSID = "\"" + ssid + "\"";
wifiConfig.preSharedKey = "\"" + password + "\"";
int netId = wifiManager.addNetwork(wifiConfig);
wifiManager.disconnect();
wifiManager.enableNetwork(netId,true);
wifiManager.reconnect();
IntentFilter wifiStatusIntentFilter = new IntentFilter();
wifiStatusIntentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
wifiStatusIntentFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
//wifiStatusIntentFilter.addAction(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
final broadcastReceiver broadcastReceiver = new broadcastReceiver() {
@Override public void onReceive(Context context,Intent intent) {
String action = intent.getAction();
if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(action)) {
NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
String str = wifiInfo.getSSID().replace("\"","");
switch (info.getState())
{
case CONNECTING:
System.out.println("Connecting");
System.out.print("\nWifiInfo: " +str);
System.out.print("\nUserInput SSID: " +ssid);
break;
case CONNECTED:
if(str.equals(ssid)) {
System.out.println("Connected ... str.equals(ssid) " + count);
System.out.println("Connected" );
passwordisCoorectError="correct";
returnWifConnection("1234","correct");
// return "correct";
}
//count = 1;
break;
case disCONNECTING:
System.out.println("disconnecting");
break;
case disCONNECTED:
System.out.println("disconnected");
System.out.println("disconnected->str" +str);
System.out.println("disconnected->ssid" +ssid);
count ++;
if(str.equals(ssid))
{
System.out.println("count str.equals(ssid) "+count);
// count = 1;
if(count==5)
{
System.out.println("count===5 "+count);
// Toast.makeText(MainActivity.this,Toast.LENGTH_SHORT).show();
passwordisCoorectError="wrong";
returnWifConnection("1234","wrong");
// return "wrong";
}
}
break;
case SUSPENDED:
System.out.println("Suspended");
break;
}
}
}
};
getApplicationContext().registerReceiver(broadcastReceiver,wifiStatusIntentFilter);
} catch (Exception e) {
e.printstacktrace();
}
}
}
我的代码没有给我正确的验证结果。实际上，当我用错误的密码连接到wifi并尝试使用此代码以正确的密码再次连接时，我遇到了问题。 Wifi未连接，控件始终进入NetworkCallback类的onUnavailable（）方法。请帮助我寻找解决方案。
解决方法
final NetworkSpecifier specifier =
new WifiNetworkSpecifier.Builder()
.setSsidPattern(new PatternMatcher("wifissid",PatternMatcher.PATTERN_PREFIX))
.setWpa2Passphrase("wifipassword")
.build();
final NetworkRequest request =
new NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
.setNetworkSpecifier(specifier)
.build();
final ConnectivityManager connectivityManager =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
final ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(@NonNull Network network) {
super.onAvailable(network);
Toast.makeText(WControllerActivity.this,"Connected!",Toast.LENGTH_SHORT);
}
};
connectivityManager.requestNetwork(request,networkCallback);
这在Android Q上有效
您需要为清单添加权限。
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>