Question

我＆＃39;开发登录界面（android）。我曾经将我的模拟器连接到数据库MySQL。但它不起作用。总是显示用户甚至没有找到我插入它。这是我模拟器的图片：

的build.gradle：申请插件：＆＃39; com.android.application＆＃39;

android { compileSdkVersion 23 buildToolsVersion＆＃34; 23.0.2＆＃34; useLibrary＆＃39; org.apache.http.legacy＆＃39;

defaultConfig {
    applicationId "com.example.mouna.androidproject"
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

}

依赖{ 编译fileTree（dir：＆＃39; libs＆＃39;，include：[＆＃39; * .jar＆＃39;]） testCompile＆＃39; junit：junit：4.12＆＃39; 编译＆＃39; com.android.support：appcompat-v7：23.1.1＆＃39; 编译＆＃39; com.android.support：design：23.1.1＆＃39;

}

AndroidPHPConnectionDemo.java：

package com.example.mouna.androidproject;

import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.BasicResponseHandler;
 import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidPHPConnectionDemo extends Activity {
Button b;
EditText et,pass;
TextView tv;
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
List<NameValuePair> nameValuePairs;
ProgressDialog dialog = null;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    b = (Button)findViewById(R.id.Button01);
    et = (EditText)findViewById(R.id.username);
    pass= (EditText)findViewById(R.id.password);
    tv = (TextView)findViewById(R.id.tv);

    b.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            dialog = ProgressDialog.show(AndroidPHPConnectionDemo.this, "",
                    "Validating user...", true);
            new Thread(new Runnable() {
                public void run() {
                    login();
                              }
            }).start();
        }
    });

  }

  void login(){
    try{

        httpclient=new DefaultHttpClient();
        httppost= new       HttpPost("http://10.0.2.2/my_folder_inside_htdocs/check.php");  
        //add your data
        nameValuePairs = new ArrayList<NameValuePair>(2);

        nameValuePairs.add(new BasicNameValuePair("username",et.getText().toString().trim()));  // $Edittext_value = $_POST['Edittext_value'];
        nameValuePairs.add(new BasicNameValuePair("password",pass.getText().toString().trim()));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        //Execute HTTP Post Request
        response=httpclient.execute(httppost);
        // edited by James from coderzheaven.. from here....
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        final String response = httpclient.execute(httppost, responseHandler);
        System.out.println("Response : " + response);
        runOnUiThread(new Runnable() {
            public void run() {
                tv.setText("Response from PHP : " + response);
                dialog.dismiss();
            }
        });

        if(response.equalsIgnoreCase("User Found")){
            runOnUiThread(new Runnable() {
                public void run() {
                    Toast.makeText(AndroidPHPConnectionDemo.this,"Login Success", Toast.LENGTH_SHORT).show();
                }
            });

            startActivity(new Intent(AndroidPHPConnectionDemo.this, UserPage.class));
        }else{
            showAlert();
        }

    }catch(Exception e){
        dialog.dismiss();
        System.out.println("Exception : " + e.getMessage());
    }
}
public void showAlert(){
    AndroidPHPConnectionDemo.this.runOnUiThread(new Runnable() {
        public void run() {
            AlertDialog.Builder builder = new AlertDialog.Builder(AndroidPHPConnectionDemo.this);
            builder.setTitle("Login Error.");
            builder.setMessage("User not Found.")
                    .setCancelable(false)
                    .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                        }
                    });
            AlertDialog alert = builder.create();
            alert.show();
        }
    });
}

}

userpage.java：包com.example.mouna.androidproject;

import android.app.Activity;
import android.os.Bundle;

public class UserPage extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.userpage);

}
}

php文件：

 mysqli_select_db($localhost,$database_localhost);
 if (isset($_POST['username'])&& isset($_POST['password'])) {
 $username = $_POST['username'];
 $password = $_POST['password'];
 $query_search = "select * from tbl_user where username = '".$username."'   AND   password = '".$password. "'";
 $query_exec = mysqli_query($localhost,$query_search) or    die(mysqli_error());
 while($row=mysqli_fetch_assoc($query_exec)){
  $output[]=$row;}
 print(json_encode($output));
 mysqli_close();

 }
 ?>

模拟器连接到wampserver

0 个答案: