Phonegap Database 问题
<!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! --------------------编程问答-------------------- 求指导 --------------------编程问答-------------------- --------------------编程问答-------------------- phonegap是手机中间件么? --------------------编程问答-------------------- phonegap 是一个软件吧, 从网上download,然后可以直接导入到eclipse里面, 基本的android配置都在里面了 --------------------编程问答-------------------- 这个真不了解啊! 等待高人. --------------------编程问答-------------------- 求高人啊 求高人
补充:移动开发 , Android