AsyncTask异步类下载图片案例

上传者: jubzr | 上传时间: 2022-09-28 16:04:20 | 文件大小: 106KB | 文件类型: ZIP
An­droid 的 UI 线程主要负责处理用户的按键事件、触屏事件等。因此其他阻塞 UI 线程的操作不应该在主线程中操作。为了避免 UI 线程失去响应的问题,An­droid 程序采用将耗时操作放在新线程中完成的方式,但是新线程可能需要动态更新 UI 组件,比如获取网络资源操作放在新线程中完成。但由于新线程不允许直接更新山 I 组件,为了解决这个问题,An­droid 提供了异步任务 (Async­Task) 的方式实现异步线程的操作。

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