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：

 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS" />

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};

@Override
protected 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~

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