سلام 

خطای دریافتی من اینه :

com.android.volley.NoConnectionError: java.net.UnknownHostException: Unable to resolve host "expertdevelopers.ir": No address associated with hostname

public class MainActivity extends AppCompatActivity {
  public static final String MY_URL 
          = "https://expertdevelopers.ir/api/v1/experts/student";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        StringRequest stringRequest = new StringRequest(Request.Method.GET,
                MY_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                Log.i("MY main ", "onResponse: ");
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.i("My main", "onErrorResponse: "+ error);
            }
        });
        RequestQueue requestQueue = Volley.newRequestQueue(this) ;
        requestQueue.add(stringRequest);
    }

 مانیفست : 

<uses-permission android:name="android.permission.INTERNET">
</uses-permission>
    <application
        android:usesCleartextTraffic="true"