为什么我的登录不能在我的应用程序中使用xampp在localhost中工作

时间：2017-11-10 09:26:22

标签： java php xml

我创建了一个应用程序，用户可以通过输入他们的电子邮件和密码来登录，活动的数据库是从php my admin with xampp创建的。数据库名称是用户，表名是详细信息。我通过输入数据库中的电子邮件和密码来测试它，但它没有做出任何反应。我已经包含了login.php，conn.php，login.java，backgroundWorker.java类。

login.xml代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#1647a3"
    android:orientation="vertical"
    android:paddingEnd="2sp"
    android:paddingStart="2sp"
    tools:context="com.example.xxxxxx.xxxxxxxxxxx.login"
    android:weightSum="1">


<ImageView
    android:id="@+id/imageView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="7sp"
    android:contentDescription="@string/icon"
    android:paddingEnd="10sp"
    android:paddingStart="10sp"
    android:src="@drawable/icon"
    tools:ignore="InefficientWeight"
    android:layout_weight="0.52" />

<TextView
    android:id="@+id/txt_itst"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:freezesText="true"
    android:paddingEnd="10sp"
    android:paddingStart="10sp"
    android:fontFamily="sans-serif-smallcaps"
    android:text="@string/app_name"
    android:textAlignment="center"
    android:textColor="#cac6bc"
    android:textSize="32sp" />

<TextView
        android:id="@+id/txtLogin"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20sp"
        android:paddingBottom="4sp"
        android:paddingEnd="16sp"
        android:paddingStart="16sp"
        android:text="@string/login_nw"
        android:textColor="#212121"
        android:textSize="16sp" />

<EditText
    android:id="@+id/Et_email"
    android:layout_width="match_parent"
    android:layout_height="35dp"
    android:layout_marginEnd="5sp"
    android:layout_marginStart="5sp"
    android:layout_marginTop="5sp"
    android:background="@drawable/passord"
    android:cursorVisible="false"
    android:ems="10"
    android:hint="@string/e_mail"
    android:inputType="textEmailAddress"
    android:paddingEnd="15sp"
    android:paddingStart="20sp"
    android:textColor="#d9d6d6"
    android:textColorHint="#292828" />


<EditText
        android:id="@+id/Password"
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:layout_marginEnd="5dp"
        android:textColor="#d9d6d6"
        android:layout_marginStart="5dp"
        android:layout_marginTop="20dp"
        android:background="@drawable/passord"
        android:cursorVisible="false"
        android:ems="10"
        android:hint="@string/pass_w"
        android:inputType="textPassword"
        android:paddingEnd="15dp"
        android:paddingStart="20dp"
        android:textColorHint="#292828" />

    <Button
        android:id="@+id/B_login"
        android:layout_width="match_parent"
        android:layout_height="36dp"
        android:layout_marginEnd="5dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="20dp"
        android:background="@drawable/passord"
        android:text="@string/lgn"
        android:textColor="#ffffff"
        android:textSize="20sp" />

    <Button
        android:id="@+id/B_register"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_marginEnd="5dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="20dp"
        android:background="@android:color/transparent"
        android:text="@string/reg_now"
        android:textColor="#ffffff"
        android:textSize="20sp" />


</LinearLayout>

login.java 

package com.example.sayuru.itstimetobeginsinanotherday;

import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.toolbox.Volley;
import org.json.JSONException;
import org.json.JSONObject;


 public class login extends AppCompatActivity {

 EditText Etemail, Etpassword;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    Etemail=(EditText)findViewById(R.id.Et_username);
    Etpassword=(EditText)findViewById(R.id.Et_pssword);

 }

 public void onLogin(View view){
  String email=Etemail.getText().toString();
  String password=Etpassword.getText().toString();
  String type="login";
  BagroundWorker bagroundWorker=new BagroundWorker(this);
  bagroundWorker.execute(type, email, password);
 }
 }

BackgroundWorker.java类

package com.example.xxxxx.xxxxxxxxxxx;

import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.app.AlertDialog;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;



public class BagroundWorker extends AsyncTask<String, Void, String> {
 Context context;
 AlertDialog alertDialog;
 BagroundWorker(Context ctx){
    context=ctx;
}
@Override
protected String doInBackground(String... params) {
    String type=params[0];
    String login_url="http:// 10.0.2.2/login.php";
    if (type.equals("login")){
        try {
            String email=params[1];
            String password=params[2];
            URL url=new URL(login_url);
            HttpURLConnection httpURLConnection=
(HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoOutput(true);
            OutputStream outputStream=httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter=new BufferedWriter(new 
OutputStreamWriter(outputStream, "UTF-8"));
            String post_data= URLEncoder.encode("email","UTF-
8")+"="+URLEncoder.encode(email,"UTF-8")+"&"
                    +URLEncoder.encode("password","UTF-
8")+"="+URLEncoder.encode(password,"UTF-8");
            bufferedWriter.write(post_data);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream=httpURLConnection.getInputStream();
            BufferedReader bufferedReader=new BufferedReader(new 
InputStreamReader(inputStream,"iso-8859-1"));
            String result="";
            String line="";
            while ((line=bufferedReader.readLine())!=null){
                result +=line;
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return null;
}

@Override
protected void onPreExecute() {
    alertDialog=new AlertDialog.Builder(context).create();
    alertDialog.setTitle("login status");
}

@Override
protected void onPostExecute(String result) {
    alertDialog.setMessage(result);
    alertDialog.show();
}

@Override
protected void onProgressUpdate(Void... values) {
    super.onProgressUpdate(values);
 }
}

conn.php与服务器进行通信

<?php 
$db_name = "user";
$mysql_username = "root";
$mysql_password = "";
$server_name = "localhost";
$conn = mysqli_connect($server_name, $mysql_username, 
$mysql_password,$db_name);


?>

login.php登录服务器

<?php 
require "conn.php";
$user_email = $_POST["email"];
$user_pass = $_POST["password"];
$mysql_qry = "select * from details where email like '$user_email' and 
password 
like '$user_pass';";
$result = mysqli_query($conn ,$mysql_qry);
if(mysqli_num_rows($result) > 0) {
echo "login success !!!!! Welcome user";
}
else {
echo "login not success";
}

?>

1 个答案:

答案 0 :(得分：0)

首先，您必须在 BackgroundWorker.java 类中启用httpURLConnection上的输入（可能是拼写错误）：

protected String doInBackground(String... params{
    ...
    httpURLConnection.setDoInput(true);
    ...
}

始终，尝试以Json格式处理响应并为登录用户存储身份验证密钥。因为我认为这只是尝试从PHP获得原始结果，所以我没有描述更多。

PHP推荐：

  1. 使用PDO代替mysqli
  2. 使用 password_hash 或 bcrypt （外部函数）在数据库中存储散列密码
  3. 使用prepared query代替原始查询

    4. 更新＃1：

    <强> login.java 

    package com.example.sayuru.itstimetobeginsinanotherday;

import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.toolbox.Volley;
import org.json.JSONException;
import org.json.JSONObject;


 public class login extends AppCompatActivity {

     EditText Etemail, Etpassword;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        Etemail=(EditText)findViewById(R.id.Et_username);
        Etpassword=(EditText)findViewById(R.id.Et_pssword);
     }

     public void onLogin(View view){
         String email=Etemail.getText().toString();
         String password=Etpassword.getText().toString();
         String type="login";
         BagroundWorker bagroundWorker=new BagroundWorker(type, email, password);
         bagroundWorker.execute((Void) null);
     }
 }

    <强> BackgroundWorker.java 

    package com.example.xxxxx.xxxxxxxxxxx;

import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.app.AlertDialog;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;



public class BagroundWorker extends AsyncTask<Void, Void, String> {
    AlertDialog alertDialog;
    String mType;
    String mEmail;
    String mPassword;
    BagroundWorker(String type, String email, String password){
        mType = type;
        mEmail = email;
        mPassword = password;
    }

    @Override
    protected String doInBackground(Void... params) {
        String login_url="http:// 10.0.2.2/login.php";
        String result = "";
        if (mType.equals("login")) {
            try {
                URL url=new URL(login_url);
                HttpURLConnection httpURLConnection=
(HttpURLConnection)url.openConnection();
                httpURLConnection.setRequestMethod("POST");
                httpURLConnection.setDoInput(true);
                httpURLConnection.setDoOutput(true);

                String data = "email=" + URLEncoder.encode(mEmail, "UTF-8") +
                              "password=" + URLEncoder.encode(mPassword, "UTF-8");
                OutputStreamWriter writer = new
                OutputStreamWriter(httpURLConnection.getOutputStream());
                writer.write(data);
                writer.flush();
                writer.close();

                int status = httpURLConnection.getResponseCode();
                if (status == HttpURLConnection.HTTP_OK) {
                    String line;
                    BufferedReader br = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));
                    while ((line = br.readLine()) != null) {
                        result += line;
                    }
                    br.close();
                }
            } catch (Exception e) {
                result = false;
            } finally {
                if (httpURLConnection != null) {
                    httpURLConnection.disconnect();
                }
            }

            return result;
        }
        return null;
    }

    @Override
    protected void onPreExecute() {
        alertDialog=new AlertDialog.Builder(getApplicationContext()).create();
        alertDialog.setTitle("login status");
    }

    @Override
    protected void onPostExecute(String result) {
        alertDialog.setMessage(result);
        alertDialog.show();
    }

    @Override
    protected void onProgressUpdate(Void... values) {
        super.onProgressUpdate(values);
    }
}

    conn.php 很好，但首选使用PDO。

    <强>的login.php 

    <?php 
require "conn.php";
$user_email = $_POST["email"];
$user_pass = $_POST["password"];
$mysql_qry = "select * from details where email like '$user_email' and 
password like '$user_pass'";
$result = mysqli_query($conn, $mysql_qry);
if(mysqli_num_rows($result) > 0) {
    echo "login success !!!!! Welcome user";
} else {
    echo "login not success";
}

    此login.php将作为示例使用，但绝不会在生产服务器上使用此类不安全的代码， 这是非常危险的 。

相关问题
最新问题