public void cancelAllDownload() {
// 如果cancelAll接口被调用，停止下载
if (singleDownloadThread != null) {
singleDownloadThread.cancelDown();
}
isDownFinish = true;
}
public void download(
Context context, String url, String path, long apkSize, DownloadProgressListener listener) {
try {
// 开始时间，放在循环外，求解的usedTime就是总时间
long startTime = System.currentTimeMillis();
isDownFinish = false; // 下载未完成
singleDownloadThread = new SingleDownloadThread(context, url, path, listener);
singleDownloadThread.setPriority(7);
singleDownloadThread.start();
while (!isDownFinish) { // 循环判断所有线程是否完成下载
Thread.sleep(50);
isDownFinish = false; // 假定全部线程下载完成
isError = false;
// 如果下载线程为空 或者 下载线程标识为下载完成但是下载进度却是-1，重新下载
if (singleDownloadThread == null
|| (singleDownloadThread.isFinish() && singleDownloadThread.getDownSize() == -1)) {
isDownFinish = false; // 设置标志为下载没有完成
isError = true;
// Log.d("SingleThreadDownloader", "下载失败，重新开启一条线程");
// 如果下载失败,再重新下载
singleDownloadThread = new SingleDownloadThread(context, url, path, listener);
singleDownloadThread.setPriority(7);
singleDownloadThread.start();
}
if (singleDownloadThread != null && singleDownloadThread.isFinish()) {
isDownFinish = true;
}
countDownProgress(listener, startTime, apkSize);
}
if (listener != null && isCancel) {
// 如果结束下载的时候，下载百分比小于100，认为是取消下载
listener.onDownCancel("");
return;
}
if (listener != null) {
countDownProgress(listener, startTime, apkSize);
listener.onDownloadFinish("", path);
}
} catch (Exception e) {
if (listener != null) {
listener.onDownFailed("", e.getMessage());
}
}
}
private void countDownProgress(DownloadProgressListener listener, long startTime, long apkSize) {
this.downloadSize = singleDownloadThread.getDownSize();
downloadPercent = new Long((this.downloadSize * 100) / apkSize).intValue();
curTime = System.currentTimeMillis();
usedTime = (int) ((curTime - startTime) / 1000);
System.out.println(
"startTime = "
+ startTime
+ ",curTime = "
+ curTime
+ " ,downloadSize = "
+ downloadSize
+ " ,usedTime ="
+ usedTime);
if (usedTime == 0) usedTime = 1;
downloadSpeed = (downloadSize / usedTime) / 1024;
if (listener != null) {
listener.onDownloading("", downloadSize, downloadSpeed, downloadPercent); // 通知目前已经下载完成的数据长度
}
}