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我在Android Studio中遇到了如何使用Android Volley字符串請求來執行JSON數組的問題。如何使用Android volley獲取並傳遞JSON數組？
我的目標是每當用戶輸入正確的登錄名和密碼。它會帶來該特定用戶的其他價值，這在我的情況下是真實姓名和部門。
我有這些JSON陣列輸出
{
"login":"ID001",
"realname":"Tom",
"dept":"ICTD"
}
生產本PHP代碼如下
的login.php
<?php
$conn = mysqli_connect("","","","");
if(
isset($_POST['login']) &&
isset($_POST['password'])
){
$login = $_POST['login'];
$password = $_POST['password'];
$sql = "SELECT * FROM users WHERE login = '$login' AND pw = '$password' ";
$result = mysqli_query($conn, $sql);
if($result && mysqli_num_rows($result) > 0){
while($row = mysqli_fetch_array($result)){
$logindb = $row['login'];
$realnamedb = $row['realname'];
$deptdb = $row['dept'];
echo "success_login";
$response = array('login' => $logindb, 'real_name' => $real_namedb, 'dept' => $deptdb);
echo json_encode($response);
}
mysqli_free_result($result);
} else {
echo "login_failed";
}
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Login</title>
</head>
<body>
<form action="login.php" method="post">
<table>
<tr>
<td>Login :</td>
<td><input type="text" name="login"></td>
</tr>
<tr>
<td>Password :</td>
<td><input type="text" name="password"></td>
</tr>
<tr>
<td><input type="submit" name="Submit" value="Login"></td>
</tr>
</table>
</form>
</body>
</html>
在Android Studio中，我目前的問題是JSON數組無法在內部顯示嘗試{}。
LoginActivity.java
public class LoginActivity extends AppCompatActivity{
EditText etLogin, etPassword;
Button bLogin;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
etLogin = (EditText)findViewById(R.id.etLogin);
etPassword = (EditText)findViewById(R.id.etPassword);
bLogin = (Button)findViewById(R.id.bLogin);
bLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String url = "http://localhost/login.php";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
if(response.equals("success_login")){
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray booking = jsonObject.getJSONArray("login");
if(booking.length() > 0){
for (int countItem = 0; countItem<booking.length(); countItem++){
JSONObject bookingObject = booking.getJSONObject(countItem);
final String login = bookingObject.isNull("login");
final String realname = bookingObject.isNull("realname");
final String dept = bookingObject.isNull("dept");
Intent intent = new Intent(LoginActivity.this, NextActivity.class);
intent.putExtra("login", login);
intent.putExtra("realname", realname);
intent.putExtra("dept", dept);
LoginActivity.this.startActivity(intent);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
} else{
Toast.makeText(getApplicationContext(), "error", Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(), "Volley error", Toast.LENGTH_SHORT).show();
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("login", etLogin.getText().toString());
params.put("password", etPassword.getText().toString());
return params;
}
};
MySingleton.getInstance(getApplicationContext()).addToRequestQueue(stringRequest);
}
});
}
}
感激，如果有人能幫助我。謝謝。
是上面給JSON輸出你的整個JSON輸出？或者它是一部分？ –
@ R.R.M，如上輸出。它不是一個部分。 – Rozaimi
如果是這樣的話，那麼如果你寫了response.equals（「success_login」）代碼的條件，它將不會進入內部。 –