我正在尝试使用eclipse创建一个应用程序。在用户注册页面中,在我输入所有必需的数据后,单击提交按钮,消息“不幸的是,你的日食已被停止”。这条消息意味着什么以及如何解决它?
public class UserRegister extends Activity {
JSONParser jsonParser = new JSONParser();
EditText inputName;
EditText inputUsername;
EditText inputEmail;
EditText inputPassword;
RadioButton button1;
RadioButton button2;
Button button3;
int success = 0;
// url to create new product
private static String url_register_user = "http://192.168.1.100/MEMS/add_user.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_register);
// Edit Text
inputName = (EditText) findViewById(R.id.nameTextBox);
inputUsername = (EditText) findViewById(R.id.usernameTextBox);
inputEmail = (EditText) findViewById(R.id.emailTextBox);
inputPassword = (EditText) findViewById(R.id.pwTextBox);
// Create button
//RadioButton button1 = (RadioButton) findViewById(R.id.studButton);
// RadioButton button2 = (RadioButton) findViewById(R.id.shopownerButton);
Button button3 = (Button) findViewById(R.id.regSubmitButton);
// button click event
button3.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String name = inputName.getText().toString();
String username = inputUsername.getText().toString();
String email = inputEmail.getText().toString();
String password = inputPassword.getText().toString();
if(name.contentEquals("")||username.contentEquals("")||email.contentEquals("")||password.contentEquals(""))
{
AlertDialog.Builder builder = new AlertDialog.Builder(UserRegister.this);
// 2. Chain together various setter methods to set the dialog characteristics
builder.setMessage(R.string.nullAlert)
.setTitle(R.string.alertTitle);
builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User clicked OK button
}
});
// 3. Get the AlertDialog from create()
AlertDialog dialog = builder.show();
}
else
{
new RegisterNewUser().execute();
}
}
});
}
class RegisterNewUser extends AsyncTask<String, String, String>{
protected String doInBackground(String... args) {
String name = inputName.getText().toString();
String username = inputUsername.getText().toString();
String email = inputEmail.getText().toString();
String password = inputPassword.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("name", name));
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_register_user,
"GET", params);
// check log cat for response
Log.d("Send Notification", json.toString());
try
{
int success = json.getInt(TAG_SUCCESS);
if (success == 1)
{
// successfully created product
Intent i = new Intent(getApplicationContext(), StudentLogin.class);
startActivity(i);
finish();
}
else
{
// failed to register
}
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
}
}
我的php文件:
<?php
/*
* Following code will create a new product row
* All product details are read from HTTP Post Request
*/
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// check for required fields
if (isset($_GET['name']) && isset($_GET['username']) && isset($_GET['email']) && isset($_GET['password'])) {
$name = $_GET['name'];
$username = $_GET['username'];
$email = $_GET['email'];
$password = $_GET['password'];
// mysql inserting a new row
$result = mysql_query("INSERT INTO register(name, username, email, password) VALUES('$name', '$username', '$email', '$password')");
// check if row inserted or not
if ($result) {
// successfully inserted into database
$response["success"] = 1;
$response["message"] = "You are successfully registered to MEMS.";
// echoing JSON response
echo json_encode($response);
}
else {
// failed to insert row
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
答案 0 :(得分:1)
将比较方法更改为equals()
,而不是代码中的contentEquals()
as String#equals()
不仅比较String的内容,还检查另一个对象是否也是String
的实例。 String#contentEquals()
methods仅比较内容(字符序列),并且不检查其他对象是否也是String
的实例。它可以是任何内容,只要它是CharSequence
的实现或StringBuffer
的实例。
所以改变你的代码就像这样
if(name.equals("")||username.equals("")||email.equals("")||password.equals(""))
{
....
}