今天我們就來說說 AsyncTask 該怎麼用
還有他後面的 < void, void, void > 三個參數的作用吧!!
我們就從解說官方的範例開始吧,code 如下:
private class DownloadFilesTask extends AsyncTask {
protected Long doInBackground(URL... urls) {
int count = urls.length;
long totalSize = 0;
for (int i = 0; i < count; i++) {
totalSize += Downloader.downloadFile(urls[i]);
publishProgress((int) ((i / (float) count) * 100));
// Escape early if cancel() is called
if (isCancelled()) break;
}
return totalSize;
}
protected void onProgressUpdate(Integer... progress) {
setProgressPercent(progress[0]);
}
protected void onPostExecute(Long result) {
showDialog("Downloaded " + result + " bytes");
}
}
先說後面的三個參數分別代表