没有错误消息提示，但代码无法工作
No error message prompt but code cannot work
我已经用Phonegap Desktop App创建了我的第一个android应用程序。使用Notepad++编辑了index.html，这是我的javascript代码：
这些应用程序可以在手机间隙和桌面浏览器中运行，但所有数据库功能都没有运行。请帮忙~
<!doctype html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=2">
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css" />
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
document.addEventListener("deviceready", MobileReady, false);
var dbase = window.openDatabase("Database", "1.0", "MyEventsdatab", 200000);
function MobileReady()
{
alert("Welcome");
dbase.transaction(pDB, errDB, sucDB);
document.addEventListener('backbutton', onBack, false);
}
function onBack()
{
if($.mobile.activePage.is('#page1'))
{
navigator.app.exitApp();
}
else
{
db.transaction(qDB, errDB);
}
}
function pDB(x)
{
x.executeSql('CREATE TABLE IF NOT EXISTS Event (id INTEGER PRIMARY KEY AUTOINCREMENT, eventname TEXT NOT NULL, eventlocation TEXT, eventdate DATE, starttime TIME, eventorganizer TEXT)'
');
x.executeSql('SELECT id, eventname, eventlocation FROM Event ORDER BY eventname', [], qSuccess, errDB);
}
function qDB(x)
{
x.executeSql('SELECT id, eventname, eventlocation FROM Event ORDER BY eventname', [], qSuccess, errDB);
}
function sucDB()
{
dbase.transaction(qDB, errDB);
}
function qSuccess(x, results)
{
$.mobile.showPageLoadingMsg(true);
var len = results.rows.length;
$("#userList").html('');
for (var i=0; i<len; i++)
{
var row= results.rows.item(i);
var hdata = '<li id="'+row["id"]+'"><a href="#"><h2>'+row["name"]+'</h2></a></li>';
$("#userList").append(hdata).listview('refresh');
}
$.mobile.changePage($("#page1"), { transition : "slide"});
$.mobile.hidePageLoadingMsg();
}
function errDB(err)
{
alert("Fail Database");
}
$("#page3 .error").html('').hide();
$(".addNew").bind("click", function (F)
{
$("#page3 .error").html('').hide();
$.mobile.changePage ($("#page3"), { transition : "slide", reverse : true });
$("#addNewPageHeader").html("Add New Event");
});
$("#save").bind("click", function (F)
{
var eventname = $.trim($("#eventname").val()));
var eventlocation = $.trim($("#eventlocation").val()));
var eventdate = $.trim($("#eventdate").val());
var starttime = $.trim($("#starttime").val());
var eventorganizer = $.trim($("#eventorganizer").val());
console.log(eventname+' '+eventlocation+' '+eventdate+' '+starttime+' '+eventorganizer);
if (eventnamename == '')
{
$("#page3 .error").html('Please enter event name.').show();
}
else
{
formReset();
var id = $("#id").val();
$("#id").val('');
if (id == '')
{
dbase.transaction(function (x){ x.executeSql("INSERT INTO Event (eventname, eventlocation, eventdate, starttime, eventorganizer) VALUES (?, ?, ?, ?, ?)",[eventname, eventlocation, eventdate, starttime, eventorganizer],
qDB, errDB); });
}
else
{
dbase.transaction(function (x){ x.executeSql("UPDATE Event SET eventname=?, eventlocation=?, eventdate=?, starttime=?, eventorganizer=? WHERE id=? ",[eventname, eventlocation, eventdate, starttime, eventorganizer, id],
qDB, errDB); });
}
dbase.transaction(qDB, errDB);
}
});
$(".refresh").bind("click", function (F)
{
dbase.transaction(qDB, errDB);
});
$(".back").bind("click", function (F)
{
formReset();
dbase.transaction(qDB, errDB);
});
function formReset()
{
$("#page3 .error").html('').hide();
$("#page3 #eventname").val('');
$("#page3 #eventlocation").val('');
$("#page3 #eventdate").val('');
$("#page3 #starttime").val('');
$("#page3 #eventorganizer").val('');
$("#page3 #addNewPageHeader").html('');
}
$("#page1 [data-role='content'] ul").on('tap taphold', 'li', function (F)
{
F.preventDefault();
F.stopImmediatePropagation();
var liId = this.id;
if (F.type === 'taphold')
{
navigator.notification.vibrate(30);
var $popup = $('#actionList-popup');
$("#actionList").html('');
$("#actionList").append('<li id="editEvent&'+Id+'">Update</li>').listview('refresh');
$("#actionList").append('<li id="deleteEvent&'+Id+'">Delete</li>').listview('refresh');
$popup.popup();
$popup.popup('open');
$("#tapHoldCheck").val('true');
}
else if (F.type === 'tap')
{
if ($("#tapHoldCheck").val() == '')
{ //tap will only work if the value of textbox is blank
dbase.transaction(function (x)
{
x.executeSql("SELECT eventname, eventlocation, eventdate, starttime, eventorganizer FROM Event WHERE id=?;", [liId], function (x, results)
{
var row = results.rows.item(0);
$.mobile.showPageLoadingMsg(true);
$.mobile.changePage($("#page2"), { transition : "slide"});
$("#headerName").html(row['eventname']);
$("#eventname").html(row['eventname']);
$("#eventlocation").html(row['eventlocation']);
$("#eventdate").html(row['date']);
$("#starttime").html(row['starttime']);
$("#eventorganizer").html(row['eventorganizer']);
$('#eventView').trigger('create');
$('#eventView').listview('refresh');
$.mobile.hidePageLoadingMsg();
});
});
}
}
});
//Change the hidden field value when the popup is closed
$('#actionList-popup').bind({
popupafterclose: function(F)
{
$("#tapHoldCheck").val('');
}
});
$("#page1 [data-role='popup'] ul").on('click', 'li', function (F)
{
var action_liId = this.id.split('&');
var action = action_liId[0];
var id = action_liId[1];
if (action == 'editEvent')
{
dbase.transaction(function (x)
{
x.executeSql("SELECT eventname, eventlocation, eventdate, starttime, eventorganizer FROM Evt WHERE id=?;", [id], function (x)
{
var row = results.rows.item(0);
$("#eventname").val(row['eventname']);
$("#eventlocation").val(row['eventlocation']);
$("#eventdate").val(row['eventdate']);
$("#starttime").val(row['starttime']);
$("#eventorganizer").val(row['eventorganizer']);
$("#id").val(id);
$("#addNewPageHeader").html('Update');
$.mobile.changePage ($("#page3"), { transition : "slide", reverse : true });
});
});
}
if (action == 'deleteEvent')
{
navigator.notification.confirm(
'Delete Event!?',
function(Button){deleteConfirm(Button, id);},
'Delete Event',
'Confirm, Cancel'
);
}
});
function deleteConfirm(Button, id)
{
if (Button === 1)
{
dbase.transaction(function (x){ x.executeSql("DELETE FROM Event WHERE id=?", [id], qDB, errDB); });
}
if (Button === 2)
{
$.mobile.changePage($("#page1"), { transition : "slide"});
}
}
});
</script>
</head>
这是我创建的表单：
<body>
<!-- Index Page Start -->
<div data-role="page" id="page1">
<div data-role="header" data-position="fixed">
<a href="#page3" class="addNew" data-role="button" data-icon="add" data-theme="b" title="Add New">Add New</a>
<h1>List Of Event</h1>
</div>
<div data-role="content">
<ul data-role="listview" data-filter="true" data-filter-placeholder="Search Event..." id="userList"> </ul>
</div>
<div data-role="popup" id="actionList-popup" data-overlay-theme="a">
<ul data-role="listview" id="actionList" style="border: 1px solid blue; width:15em"> </ul>
</div>
<input type="hidden" id="tapHoldCheck" value="" />
</div>
<!-- Index Page End -->
<!-- Data Display Page Start -->
<div data-role="page" id="page2">
<div data-role="header" data-position="fixed">
<a href="#page1" class="back" data-role="button" data-icon="arrow-l" data-theme="b" title="Back">Home</a>
<h1 id="headerName"></h1>
</div>
<div data-role="content">
<ul data-role="listview" id="eventView">
<li>Event Name: <span id="eventname"></span></li>
<li>Event Location: <span id="eventlocation"></span></li>
<li>Event Date: <span id="eventdate"></span></li>
<li>Event Start Time: <span id="starttime"></span></li>
<li>Event Organizer: <span id="eventorganizer"></span></li>
</ul>
</div>
</div>
<!-- Data Display Page End -->
<!-- Form Page Start -->
<div data-role="page" id="page3">
<div data-role="header" data-position="fixed">
<a href="#page1" class="back" data-role="button" data-icon="arrow-l" data-theme="a" title="Back">Home</a>
<h1 id="addNewPageHeader"></h1>
<a href="#page1" id="save" data-role="button" data-icon="check" data-theme="a" title="Save">Save</a>
</div>
<div data-role="content">
<div class='error'></div>
<div data-role="fieldcontain">
<label for="eventname">Event Name:</label>
<input type="text" name="eventname" id="eventname" required="true" value=""></input>
</div>
<div data-role="fieldcontain">
<label for="eventlocation">Event Location:</label>
<input type="text" name="eventlocation" id="eventlocation" value="" ></input>
</div>
<div data-role="fieldcontain">
<label for="eventdate">Event Date:</label>
<input type="date" name="eventdate" id="eventdate" value=""></input>
</div>
<div data-role="fieldcontain">
<label for="starttime">Event Start Time:</label>
<input type="time" name="starttime" id="starttime" value=""></input>
</div>
<div data-role="fieldcontain">
<label for="eventorganizer">Event Organizer:</label>
<input type="text" name="eventorganizer" id="eventorganizer" value=""></input>
</div>
<input type="hidden" name="id" id="id" value="" />
</div>
</div>
</body>
</html>
WebSql数据库已经由Chrome和其他一些浏览器实现。您必须使用不支持WebSql的浏览器。尝试在Chrome浏览器中运行该应用程序。它支持WebSql数据库。
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