我正在尝试将以前基于活动的教程转换为片段,但我继续在我的适配器上遇到NullPointerException错误.
本教程基于此,我已经缩减了适配器的构造函数,因为它曾经调用了一个Activity.
这里有一种可能的解决方案,但没有人知道如何处理同样可能的问题.
我想将所有内容转换为工作片段.如果您需要我提供更多信息,请与我们联系.
主要转换类:
public class mainViewController2 extends Fragment {
private static final String TAG = mainViewController2.class.getSimpleName();
private ListView listView;
private FeedListAdapter listAdapter;
private List<FeedItem> feedItems;
private String URL_FEED = "http://api.androidhive.info/feed/feed.json";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.mainviewcontroller2_fragment, container, false);
listView = (ListView) v.findViewById(R.id.list);
feedItems = new ArrayList<FeedItem>();
//where the error shows up?
listAdapter = new FeedListAdapter(feedItems);
listView.setAdapter(listAdapter);
// We first check for cached request
Cache cache = …我试图将数据发布到数据库,但问题是我似乎无法从用户获取在UIAlertView中输入的文本.我已经尝试了很多解决方案,例如子视图UITextField,但没有运气.这是我目前的简单配置.如果您需要更多信息,请与我们联系.
- (void)viewDidLoad
{
[super viewDidLoad];
//load site in webview
NSURLRequest *siteRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://google.com/"]
cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
[webview loadRequest:siteRequest];
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Welcome" message:@"Please enter your email address." delegate:self cancelButtonTitle:@"Submit" otherButtonTitles:@"Skip", nil];
alertView.alertViewStyle = UIAlertViewStylePlainTextInput;
UITextField *emailInput = [alertView textFieldAtIndex:0];
[alertView show];
emails=emailInput.text;
// NSLog(emails);
phone=@"8675309";
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
该页面似乎没有写入数据库.我有一种感觉,这可能是数据库错误,而不是表单提交本身.我找不到任何错误,我似乎无法弄清楚为什么数据库不接受我的参数.请参阅下面的代码和数据库结构.如果您需要更多信息,请与我们联系.
<?php
session_name('shipshapeLogin');
session_set_cookie_params(2*7*24*60*60);
session_start();
define('INCLUDE_CHECK',true);
require('connect.php');
//require_once('business.php');
if(empty($_SESSION['id']))
{
header("Location: index.php");
exit;
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Ad Posting</title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<script src="https://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" type="text/css" href="advertise.css" />
<link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<script>
$(function() {
$( "#from" ).datepicker({
defaultDate: "+1w",
changeMonth: true,
numberOfMonths: 3,
onClose: function( selectedDate ) {
$( "#to" ).datepicker( "option", "minDate", selectedDate );
}
});
$( "#to" ).datepicker({
defaultDate: "+1w",
changeMonth: true,
numberOfMonths: 3,
onClose: function( selectedDate ) { …