从Android插入数据到MySql中

Question

我需要创建一个具有注册活动的Android应用程序，所以我需要将一些数据插入到mysql数据库中。我尝试了一些不同的教程和指南，但没有任何帮助我解决我的问题。

谁能帮帮我？

我后我的最后代码在这里：

Register.java

public class Register extends AppCompatActivity implements View.OnClickListener { 

private Button bRegister; 
private EditText etName, etSurname, etAge, etEmail, etPassword; 

private static final String REGISTER_URL = "http://localhost/sFitness/Register.php"; 

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

    etName = (EditText) findViewById(R.id.etName); 
    etSurname = (EditText) findViewById(R.id.etSurname); 
    etAge = (EditText) findViewById(R.id.etAge); 
    etEmail = (EditText) findViewById(R.id.etEmail); 
    etPassword = (EditText) findViewById(R.id.etPassword); 

    bRegister = (Button) findViewById(R.id.bRegister); 
    bRegister.setOnClickListener(this); 
} 

@Override 
public void onClick(View v) { 
    switch (v.getId()) { 
     case R.id.bRegister: 
      registerUser(); 
      break; 
    } 
} 

private void registerUser() { 
    String name = etName.getText().toString(); 
    String surname = etSurname.getText().toString(); 
    String age = etAge.getText().toString(); 
    String email = etEmail.getText().toString(); 
    String password = etPassword.getText().toString(); 

    register(name, surname, age, email, password); 
} 

private void register(String name, String surname, String age, String email, String password) { 
    class RegisterUser extends AsyncTask<String, Void, String> { 

     ProgressDialog loading; 
     RegisterUserClass ruc = new RegisterUserClass(); 

     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 

      loading = ProgressDialog.show(Register.this, "Please wait...", null, true, true); 
     } 

     @Override 
     protected void onPostExecute(String s) { 
      super.onPostExecute(s); 
      loading.dismiss(); 
      Toast.makeText(getApplicationContext(), s, Toast.LENGTH_LONG).show(); 
     } 

     @Override 
     protected String doInBackground(String... params) { 
      HashMap<String, String> data = new HashMap<String, String>(); 
      data.put("name", params[0]); 
      data.put("surname", params[1]); 
      data.put("age", params[2]); 
      data.put("email", params[3]); 
      data.put("password", params[4]); 

      String result = ruc.sendPostRequest(REGISTER_URL, data); 
      return result; 
     } 
    } 
    RegisterUser ru = new RegisterUser(); 
    ru.execute(name, surname, age, email, password); 
} 
} 

RegisterUserClass.java

import org.apache.http.params.HttpParams; 
import org.apache.http.*; 

import java.io.BufferedReader; 
import java.io.BufferedWriter; 
import java.io.InputStreamReader; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter; 
import java.io.UnsupportedEncodingException; 
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.net.URLEncoder; 
import java.util.HashMap; 
import java.util.Map; 

import javax.net.ssl.HttpsURLConnection; 

/** 
* Created by Silvia Berardo on 29/12/2015. 
*/ 



public class RegisterUserClass { 

public String sendPostRequest(String requestURL, 
           HashMap<String, String> postDataParams) { 

    URL url; 
    String response = ""; 
    try { 
     url = new URL(requestURL); 

     HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
     conn.setReadTimeout(15000); 
     conn.setConnectTimeout(15000); 
     conn.setRequestMethod("POST"); 
     conn.setDoInput(true); 
     conn.setDoOutput(true); 


     OutputStream os = conn.getOutputStream(); 
     BufferedWriter writer = new BufferedWriter(
       new OutputStreamWriter(os, "UTF-8")); 
     writer.write(getPostDataString(postDataParams)); 

     writer.flush(); 
     writer.close(); 
     os.close(); 
     int responseCode=conn.getResponseCode(); 

     if (responseCode == HttpsURLConnection.HTTP_OK) { 
      BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream())); 
      response = br.readLine(); 
     } 
     else { 
      response="Error Registering"; 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 

    return response; 
} 

private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException { 
    StringBuilder result = new StringBuilder(); 
    boolean first = true; 
    for(Map.Entry<String, String> entry : params.entrySet()){ 
     if (first) 
      first = false; 
     else 
      result.append("&"); 

     result.append(URLEncoder.encode(entry.getKey(), "UTF-8")); 
     result.append("="); 
     result.append(URLEncoder.encode(entry.getValue(), "UTF-8")); 
    } 

    return result.toString(); 
} 
} 

的问题是，这个代码给我发邮件，告诉我该数据库不起作用...为什么？

Answer 1

更换行：

private static final String REGISTER_URL = "http://localhost/sFitness/Register.php"; 

随着

private static final String REGISTER_URL = `"http://10.0.2.2/sFitness/Register.php";` 

本地主机并不是指你的PC的IP地址，但它指的是在你的模拟器本地主机。如果您使用10.0.2.2，那么它应该工作或提出另一个错误消息。

如果你正在使用GenyMotion那么你需要使用：

private static final String REGISTER_URL = `"http://10.0.3.2/sFitness/Register.php";` 

所有这些信息都被发现here