Question

我需要创建一个带有注册活动的Android应用，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？

我在这里发布了我的最后一段代码：

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();
}
}

问题是这段代码给我发了一条消息，告诉我数据库不起作用......为什么？

Answer 1

替换行：

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

使用

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

localhost不是指您的PC IP地址，但它指的是您的模拟器上的localhost。如果您使用10.0.2.2，那么它应该工作或显示另一条错误消息。

如果您使用的是GenyMotion，则需要使用：

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

找到所有这些信息here

从Android将数据插入MySql

1 个答案: