<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Contact Example</title> <script type="text/javascript" charset="utf-8" src="phonegap.js"></script>
<script type="text/javascript" charset="utf-8"> // Wait for PhoneGap to load
//
function onLoad() {
document.addEventListener("deviceready", onDeviceReady, false);
} // Populate the database
//
function populateDB(tx) {
tx.executeSql('DROP TABLE DEMO');
tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
} // Query the database
//
function queryDB(tx) {
tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB);
} // Query the success callback
//
function querySuccess(tx, results) {
var len = results.rows.length;
console.log("DEMO table: " + len + " rows found.");
for (var i=0; i<len; i++){
console.log("Row = " + i + " ID = " + results.rows.item(i).id + " Data = " + results.rows.item(i).data);
}
alert("for loop");
} // Transaction error callback
//
function errorCB(err) {
console.log("Error processing SQL: "+err.code);
} // Transaction success callback
//
function successCB() {
var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000);
db.transaction(queryDB, errorCB);
alert("haha");
} // PhoneGap is ready
//
function onDeviceReady() {
var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000);
db.transaction(populateDB, errorCB, successCB);
} </script>
</head>
<body onload="onLoad()">
<h1>Example</h1>
<p>Database</p>
</body>
</html>这是我html的全部代码,我的问题如下
1.Select的data不显示, 自己做了个alert check, 有时候可以alert,有时候不可以
2.console.log 是做什么用的? 是不是就是显示data的功能? 如果是的话 具体显示在哪里?求指导!
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Contact Example</title> <script type="text/javascript" charset="utf-8" src="phonegap.js"></script>
<script type="text/javascript" charset="utf-8"> // Wait for PhoneGap to load
//
function onLoad() {
document.addEventListener("deviceready", onDeviceReady, false);
} // Populate the database
//
function populateDB(tx) {
tx.executeSql('DROP TABLE DEMO');
tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
} // Query the database
//
function queryDB(tx) {
tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB);
} // Query the success callback
//
function querySuccess(tx, results) {
var len = results.rows.length;
console.log("DEMO table: " + len + " rows found.");
for (var i=0; i<len; i++){
console.log("Row = " + i + " ID = " + results.rows.item(i).id + " Data = " + results.rows.item(i).data);
}
alert("for loop");
} // Transaction error callback
//
function errorCB(err) {
console.log("Error processing SQL: "+err.code);
} // Transaction success callback
//
function successCB() {
var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000);
db.transaction(queryDB, errorCB);
alert("haha");
} // PhoneGap is ready
//
function onDeviceReady() {
var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000);
db.transaction(populateDB, errorCB, successCB);
} </script>
</head>
<body onload="onLoad()">
<h1>Example</h1>
<p>Database</p>
</body>
</html>这是我html的全部代码,我的问题如下
1.Select的data不显示, 自己做了个alert check, 有时候可以alert,有时候不可以
2.console.log 是做什么用的? 是不是就是显示data的功能? 如果是的话 具体显示在哪里?求指导!
解决方案 »
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