【发布时间】：2017-09-06 23:49:23
【问题描述】：
我正在尝试让一个在 Android Studio 中开发的 android 应用程序将数据从 注册用户活动 发送到数据库。这个想法是，一旦用户输入所有必需的信息并单击注册按钮，数据应该进入数据库，登录活动应该重新出现。但是，当我点击 Register user activity 上的注册按钮时，什么也没有发生，没有重定向到 Login activity 或数据被发送到数据库。
下面是我的注册用户活动代码：
package com.example.vi5h.split;
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 RegisterUserActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register_user);
final EditText etFullName = (EditText) findViewById(R.id.etFullName);
final EditText etUsername = (EditText) findViewById(R.id.etUsername);
final EditText etPassword = (EditText) findViewById(R.id.etPassword);
final EditText etEmail = (EditText) findViewById(R.id.etEmail);
final Button btnRegister = (Button) findViewById(R.id.btnRegister);
btnRegister.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String name = etFullName.getText().toString();
final String username = etUsername.getText().toString();
final String password = etPassword.getText().toString();
final String email = etEmail.getText().toString();
Response.Listener<String> responseListener = new Response.Listener<String>(){
@Override
public void onResponse(String response) {
try {
JSONObject jsonResponse = new JSONObject(response);
boolean success = jsonResponse.getBoolean("success");
if (success){
Intent intent = new Intent(RegisterUserActivity.this, LoginActivity.class);
RegisterUserActivity.this.startActivity(intent);
}else {
AlertDialog.Builder builder = new AlertDialog.Builder(RegisterUserActivity.this);
builder.setMessage("Register Failed")
.setNegativeButton("Retry", null)
.create()
.show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
};
RegisterRequest registerRequest = new RegisterRequest(name, username, email, password, responseListener);
RequestQueue queue = Volley.newRequestQueue(RegisterUserActivity.this);
queue.add(registerRequest);
}
});
}
}
下面是我的注册请求类代码：
package com.example.vi5h.split;
import com.android.volley.Response;
import com.android.volley.toolbox.StringRequest;
import java.util.HashMap;
import java.util.Map;
public class RegisterRequest extends StringRequest {
private static final String REGISTER_REQUEST_URL = "https://split.000webhostapp.com/Register.php";
private Map<String, String> params;
public RegisterRequest(String name, String username, String email, String password, Response.Listener<String> listener)
{
super(Method.POST, REGISTER_REQUEST_URL, listener, null);
params = new HashMap<>();
params.put("name", name);
params.put("username", username);
params.put("email", email);
params.put("password", password);
}
@Override
public Map<String, String> getParams() {
return params;
}
}
下面是我的PHP脚本（Register.php）：
<?php
$con = mysqli_connect("localhost", "id2833909_split421", "pass321", "id2833909_splitw");
$name = $_POST["name"];
$email = $_POST["email"];
$username = $_POST["username"];
$password = $_POST["password"];
$statement = mysqli_prepare($con, "INSERT INTO user (name, username, email, password) VALUES (?, ?, ?, ?)");
mysqli_stmt_bind_param($statement, "siss", $name, $username, $email, $password);
mysqli_stmt_execute($statement);
$response = array();
$response["success"] = true;
echo json_encode($response);
?>
最后是我点击注册按钮后Logcat上抛出的错误：
https://imgur.com/b8x0Su6
【问题讨论】：
-
由于
<br开始一个 HTML 标签，你可能会得到一个错误页面。 -
@CommonsWare 嘿，谢谢你的回复，但你能说得更具体点吗.. 谢谢 :)
标签： java php android json database