Android 9.0以上 连接wifi失败 解决方案

Android9开始，WIFI那块的API发生了改变：
addNetwork(WifiConfiguration config)
此方法在API级别Q中已弃用）
见addNetworkSuggestions(java.util.List)， removeNetworkSuggestions(java.util.List)新的API添加Wi-Fi网络进行审议时，自动连接到无线网络。 兼容性注意：对于目标Build.VERSION_CODES.Q或更高的应用程序 ，此API将始终返回-1。

废话不多说直接上代码：
首先需要在清单文件中添加权限：

其次需要再activity动态申请权限，代码如下：
public class MainActivity extends AppCompatActivity {
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION};

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    verifyStoragePermissions(MainActivity.this);    findViewById(R.id.but1).setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {            test("ssid","密码");        }    });    findViewById(R.id.but2).setOnClickListener(new View.OnClickListener() {        private WifiUtils instance;        @Override        public void onClick(View v) {            test("ssid-WIFI","密码");        }    });}public void verifyStoragePermissions(Activity activity) {ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE, 1);}public void test(String name,String wpd){    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q)    {        NetworkSpecifier specifier =                new WifiNetworkSpecifier.Builder()                        .setSsidPattern(new PatternMatcher(name, PatternMatcher.PATTERN_PREFIX))                        .setWpa2Passphrase(wpd)                        .build();        NetworkRequest request =                new NetworkRequest.Builder()                        .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)                        .removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)                        .setNetworkSpecifier(specifier)                        .build();        ConnectivityManager connectivityManager = (ConnectivityManager)                getSystemService(Context.CONNECTIVITY_SERVICE);        ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {            @Override            public void onAvailable(Network network) {                // do success processing here..            }            @Override            public void onUnavailable() {                // do failure processing here..            }        };        connectivityManager.requestNetwork(request, networkCallback);        // Release the request when done.        // connectivityManager.unregisterNetworkCallback(networkCallback);    }}

}

完美解决Android9.0以上wifi连接失败的问题~

来源地址：https://blog.csdn.net/hongranzuoxiang/article/details/131183900