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AsyncTaskDemo

用AsyncTask异步实现图片加载

LoadImageTask/Two/Three代码相同,其原理就是在Activity的主线程去调用自定义AsyncTask的execute()方法,然后在重写的doInBackground()方法中 模拟耗时操作,通过publishProgress()方法发送进度,以便以在onProgressUpdate()方法中给progress设置进度,最后在onPostExecute()方法中 显示UI的更新

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用AsyncTask异步实现图片加载

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