适用于Android的Titanium HttpClient缓存

时间:2013-10-04 09:10:15

标签: titanium titanium-alloy

我需要为Android设备缓存我的HttpClient响应。官方文件中给出的例子适用于Iphone& iPad兼容。

1 个答案:

答案 0 :(得分:0)

好的,这是实现这一目标的一种方法:

在您的httpRequests成功处理程序中,为您的回复附加“时间戳”:

// Assuming you are working with JSON data
var response = JSON.parse(this.responseText);
response.timestamp = new Date();

// For the purpose of this example, we persist our response to properties
Ti.App.Properties.setObject('cachedResponse', response);

在你的按钮eventListener中,我们将检查已经过的时间

button.addEventListener('click', function() {        
    var cachedResponse = Ti.App.Properties.getObject('cachedResponse', { timestamp: false });
    if(cachedResponse.timestamp) {
        if(getHoursDiff(cachedResponse.timestamp, new Date()) > 24) {
            // Last request older than 24 hours, reload data
        } else {
            // Last request was within 24 hours, use cached data
        }
    } else {
       // No data has been saved yet, load Data
    } 
});

此函数以小时计算时差

// http://blogs.digitss.com/javascript/calculate-datetime-difference-simple-javascript-code-snippet/
function getHoursDiff(earlierDate, laterDate) {
       var nTotalDiff = laterDate.getTime() - earlierDate.getTime();
       var hours = Math.floor(nTotalDiff/1000/60/60);
       return hours;
}


注意
这不是一个完整的示例,您必须根据需要优化和更改代码。