方法一

	
        context.startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));	
	
	

方法二

		
        Button buttonWifi = root.findViewById(R.id.buttonWifi);
        buttonWifi.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                ComponentName componentName = new ComponentName("com.android.settings", "com.android.settings.wifi.WifiSettings");
                intent.setComponent(componentName);
                ResolveInfo resolveInfo = getActivity().getPackageManager().resolveActivity(intent, 0);
                if (resolveInfo != null) {
                    startActivity(intent);
                }
            }
        });