如何解决java.net.SocketException：套接字失败：EPERM（不允许操作）

Question

[当我使用Android Studio为本地数据库创建简单注册时，遇到了标题上显示的问题，这是我的代码：

public class registerInterface extends AppCompatActivity {
    private EditText editTextUsername, editTextPassword, editTextEmail;
    private Button buttonRegister, backToLogin;
    private ProgressDialog progressDialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.registration_interface);
        editTextUsername = findViewById(R.id.username);
        editTextPassword = findViewById(R.id.password);
        editTextEmail = findViewById(R.id.email);

        buttonRegister = findViewById(R.id.register);
        backToLogin = findViewById(R.id.go_back_login);

        progressDialog = new ProgressDialog(this);

        buttonRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                registerUser();
            }
        });

    }

    public void registerUser(){
        final String email = editTextEmail.getText().toString().trim();
        final String password = editTextPassword.getText().toString().trim();
        final String username = editTextUsername.getText().toString().trim();

        progressDialog.setMessage("Registering...");
        progressDialog.show();

        StringRequest stringRequest = new StringRequest(Request.Method.POST, DataBaseConstants.URL_REGISTER, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                progressDialog.dismiss();
                try {
                    JSONObject jsonObject = new JSONObject(response);
                    Toast.makeText(getApplicationContext(), jsonObject.getString("message"), Toast.LENGTH_LONG).show();
                } catch (JSONException e){
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                progressDialog.hide();
                Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();

            }
        }){
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> params = new HashMap<>();
                params.put("username", username);
                params.put("email", email);
                params.put("password", password);
                return params;
            }
        };

        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);
    }
}

我已经将它们添加到我的AndroidManifest.xml中，但仍然无法正常工作：

<uses-permission android:name="android.promission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

我不是关于IP地址的问题，但我只是无法弄清楚。

Answer 1

只需从模拟器中卸载应用程序，然后再次运行，我将遇到同样的问题，它将正常运行。

有时在模拟器出现问题时会发生此问题。