Question

我正在使用Volley向我服务器上的login.php发送登录请求。当我单击登录时，它应该给出错误或登录。我遇到的问题是它显示进度对话框并且什么都不做，进度对话框永远不会消失。任何人都知道可能是什么问题？

package com.application.application;

import android.app.ProgressDialog;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.HashMap;
import java.util.Map;

public class MemberLogin extends AppCompatActivity {

    private EditText email, password;
    private RequestQueue requestQueue;
    private static final String URL = "http://www.example.com/login.php";
    private StringRequest request;
    ProgressDialog progressDialog;

    UserLocalStore userLocalStore;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_member_login);

        userLocalStore = new UserLocalStore(this);

        email = (EditText) findViewById(R.id.etEmail);
        password = (EditText) findViewById(R.id.etPassword);

        Button login = (Button) findViewById(R.id.btnLogin);
        Button cancel = (Button) findViewById(R.id.btnCancel);

        progressDialog = new ProgressDialog(this);
        progressDialog.setCancelable(false);
        progressDialog.setTitle("Processing");
        progressDialog.setMessage("Please wait...");

        email.requestFocus();

        requestQueue = Volley.newRequestQueue(this);

        cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(MemberLogin.this, MemberAccess.class));
            }
        });

        login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                request = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        progressDialog.show();
                        try {
                            JSONObject jsonObject = new JSONObject(response);
                            if (jsonObject.names().get(0).equals("success")) {
                                User user = new User(email.getText().toString(), password.getText().toString());
                                Toast.makeText(MemberLogin.this, jsonObject.getString("success"), Toast.LENGTH_SHORT).show();
                                userLocalStore.setUserLoggedIn(true);
                                userLocalStore.storeUserData(user);
                                startActivity(new Intent(MemberLogin.this, MemberHome.class));
                            } else {
                                progressDialog.dismiss();
                                Toast.makeText(MemberLogin.this, jsonObject.getString("error"), Toast.LENGTH_SHORT).show();
                                password.setText("");
                                if (email.getText().toString().equals("")) {
                                    email.requestFocus();
                                } else {
                                    password.requestFocus();
                                }
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {

                    }
                }) {
                    @Override
                    protected Map<String, String> getParams() throws AuthFailureError {
                        HashMap<String, String> hashMap = new HashMap<>();
                        hashMap.put("email", email.getText().toString());
                        hashMap.put("password", password.getText().toString());
                        progressDialog.dismiss();
                        return hashMap;
                    }
                };
                requestQueue.add(request);
            }
        });
    }
}

Answer 1

您需要像这样更新此方法：

URL url = new URL("https://www.android.com");
                HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
                urlc.setConnectTimeout(5000);
                urlc.connect();
                if (urlc.getResponseCode() == 200) {
                    urlc.disconnect();
                    return true;
                }

Answer 2

可能是您无法访问对话框的地方。

protected Map<String, String> getParams() throws AuthFailureError

检查您需要关闭所有对话框的所有其他方案和地点。

一个建议是设置对话框Cancelable为true，即progressDialog.setCancelable（false）;至少，用户可以选择取消和关闭应用程序。

Answer 3

编辑您的答案如下：

  login.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            request = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    progressDialog.show();
                    try {
                        JSONObject jsonObject = new JSONObject(response);
                        if (jsonObject.names().get(0).equals("success")) {
                            User user = new User(email.getText().toString(), password.getText().toString());
                            Toast.makeText(MemberLogin.this, jsonObject.getString("success"), Toast.LENGTH_SHORT).show();
                            userLocalStore.setUserLoggedIn(true);
                            userLocalStore.storeUserData(user);
                            startActivity(new Intent(MemberLogin.this, MemberHome.class));
                        } else {

                            Toast.makeText(MemberLogin.this, jsonObject.getString("error"), Toast.LENGTH_SHORT).show();
                            password.setText("");
                            if (email.getText().toString().equals("")) {
                                email.requestFocus();
                            } else {
                                password.requestFocus();
                            }
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }, new Response.ErrorListener() {
                @Override
              public void onErrorResponse(VolleyError error)    {    progressDialog.dismiss(); }}){
                @Override
                protected Map<String, String> getParams() throws AuthFailureError {
                    HashMap<String, String> hashMap = new HashMap<>();
                    hashMap.put("email", email.getText().toString());
                    hashMap.put("password", password.getText().toString());
                    progressDialog.dismiss();
                    return hashMap;
                }
            };
            requestQueue.add(request);
        }
    });
}

}

Android进度对话框显示但从未解散，应用程序停留在进度对话框中

3 个答案: