/**
* 停止任务
*
* @param url
* @param remove
*/
public void stopTask(String url, boolean remove) {
// 下载中停止task
removeDownloadingMap(url);
Iterator<DownloadInfo> downloadingIt = mDownloadingTasks.iterator();
while (downloadingIt.hasNext()) {
DownloadInfo b = downloadingIt.next();
if (TextUtils.equals(b.getUrl(), url)) {
b.setState(DownloadInfo.PAUSE);
downloadingIt.remove();
if (!remove) {
mPausingTasks.add(b); // 放入暂停队列
}
break;
}
}
Iterator<DownloadInfo> waitIt = mWaitTasks.iterator();
while (waitIt.hasNext()) {
DownloadInfo b = waitIt.next();
if (TextUtils.equals(b.getUrl(), url)) {
b.setState(DownloadInfo.PAUSE);
waitIt.remove();
if (!remove) {
mPausingTasks.add(b); // 放入暂停队列
}
break;
}
}
}
/**
* 重新下载
*
* @param url
*/
public void restartTask(String url) {
Iterator<DownloadInfo> pauseIt = mPausingTasks.iterator();
if (mPausingTasks.size() > 0) {
synchronized (mIteratorLock) {
while (pauseIt.hasNext()) {
DownloadInfo downloadInfo = pauseIt.next();
if (TextUtils.equals(downloadInfo.getUrl(), url)) {
if (mDownloadingTasks.size() < MAX_DOWNLOAD_COUNT) {
downloadInfo.setState(DownloadInfo.DOWNLOADING);
DownloadHttpTask task =
new DownloadHttpTask(downloadInfo, mDownloadUIHandler, mDbHelper, this);
mDownloadingTaskMap.put(url, task);
mDownloadingTasks.add(downloadInfo);
pauseIt.remove();
task.start();
} else {
downloadInfo.setState(DownloadInfo.WAIT);
mWaitTasks.offer(downloadInfo);
pauseIt.remove();
}
return;
}
}
}
} else {
stopTask(url);
restartTask(url);
}
}
@Override
public void run() {
while (!isStop() && !isFinish()) {
try {
URL url = new URL(info.getUrl());
HttpURLConnection con = (HttpURLConnection) url.openConnection();
String prop = "bytes=" + info.getPos() + "-";
System.out.println(prop);
System.out.println(info.getFileSize());
con.setRequestProperty("RANGE", prop);
InputStream is = con.getInputStream();
raf = new RandomAccessFile(info.getFileName(), "rw");
raf.seek(info.getPos());
byte[] buffer = new byte[BUFFER_SIZE];
int b = -1;
while ((b = is.read(buffer)) != -1 && !isStop()) {
raf.write(buffer, 0, b);
info.setPos(info.getPos() + b);
}
if (!isStop()) {
isFinish = true;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
raf.close();
} catch (IOException e) {
}
}
}
}
/**
* Create a builder from the DownloadInfo object.
*
* @param downloadInfo DownloadInfo object from which builder fields are populated.
* @return A builder initialized with fields from downloadInfo object.
*/
public static Builder fromDownloadInfo(final DownloadInfo downloadInfo) {
Builder builder = new Builder();
builder
.setUrl(downloadInfo.getUrl())
.setUserAgent(downloadInfo.getUserAgent())
.setMimeType(downloadInfo.getMimeType())
.setCookie(downloadInfo.getCookie())
.setFileName(downloadInfo.getFileName())
.setDescription(downloadInfo.getDescription())
.setFilePath(downloadInfo.getFilePath())
.setReferer(downloadInfo.getReferer())
.setOriginalUrl(downloadInfo.getOriginalUrl())
.setContentLength(downloadInfo.getContentLength())
.setDownloadGuid(downloadInfo.getDownloadGuid())
.setHasUserGesture(downloadInfo.hasUserGesture())
.setContentDisposition(downloadInfo.getContentDisposition())
.setIsGETRequest(downloadInfo.isGETRequest())
.setPercentCompleted(downloadInfo.getPercentCompleted())
.setTimeRemainingInMillis(downloadInfo.getTimeRemainingInMillis())
.setIsResumable(downloadInfo.isResumable())
.setIsPaused(downloadInfo.isPaused())
.setIsOffTheRecord(downloadInfo.isOffTheRecord())
.setIsOfflinePage(downloadInfo.isOfflinePage());
return builder;
}
/**
* 根据URL获取DownloadInfo
*
* @param url
* @return
*/
public DownloadInfo getDownloadByUrl(String url) {
Iterator<DownloadInfo> allTaskIt = mAllTasks.iterator();
while (allTaskIt.hasNext()) {
DownloadInfo bean = allTaskIt.next();
if (TextUtils.equals(bean.getUrl(), url)) {
return bean;
}
}
return null;
}
/** 更改数据，根据指定id更改 */
public synchronized void update(DownloadInfo info) {
open();
ContentValues initialValues = new ContentValues();
initialValues.put(ID, info.getId());
initialValues.put(NAME, info.getFilename());
initialValues.put(LOCAL_NAME, info.getLocalname());
initialValues.put(URL, info.getUrl());
initialValues.put(FILE_SIZE, info.getFilesize());
initialValues.put(COMPLETE_SIZE, info.getCompletesize());
db.update(DATABASE_TABLE, initialValues, ID + "=" + info.getId(), null);
close();
}
private void executeNextTask() {
if (mDownloadingTasks.size() < MAX_DOWNLOAD_COUNT) {
if (mWaitTasks.size() > 0) {
DownloadInfo downloadInfo = mWaitTasks.poll();
if (downloadInfo != null) {
String url = downloadInfo.getUrl();
downloadInfo.setState(DownloadInfo.DOWNLOADING);
DownloadHttpTask task =
new DownloadHttpTask(downloadInfo, mDownloadUIHandler, mDbHelper, this);
mDownloadingTaskMap.put(url, task);
task.start();
}
}
} else {
Logger.d("已达到最大下载数量：" + mDownloadingTasks.size());
}
}
public void start() {
Log.w(TAG, "start");
if (downloadInfos != null) {
if (state == Download_State.Downloading) {
return;
}
state = Download_State.Downloading;
for (DownloadInfo info : downloadInfos) {
Log.v(TAG, "startThread");
new DownloadThread(
info.getThreadId(),
info.getStartPos(),
info.getEndPos(),
info.getCompeleteSize(),
info.getUrl())
.start();
}
}
}
/**
* 删除任务
*
* @param url
*/
public void deleteTask(String url) {
// 从等待队列和下载中
stopTask(url, true);
// 从已暂停队列移除
Iterator<DownloadInfo> pausingIt = mPausingTasks.iterator();
synchronized (mIteratorLock) {
while (pausingIt.hasNext()) {
DownloadInfo bean = pausingIt.next();
if (TextUtils.equals(bean.getUrl(), url)) {
bean.setState(DownloadInfo.PAUSE);
pausingIt.remove();
break;
}
}
}
// 从完成队列移除
Iterator<DownloadInfo> completeIt = mCompleteTasks.iterator();
synchronized (mIteratorLock) {
while (completeIt.hasNext()) {
DownloadInfo bean = completeIt.next();
if (TextUtils.equals(bean.getUrl(), url)) {
bean.setState(DownloadInfo.PAUSE);
completeIt.remove();
break;
}
}
}
synchronized (mIteratorLock) {
String filePath = "";
// 所有任务
Iterator<DownloadInfo> allTaskIt = mAllTasks.iterator();
while (allTaskIt.hasNext()) {
DownloadInfo bean = allTaskIt.next();
if (TextUtils.equals(bean.getUrl(), url)) {
bean.setState(DownloadInfo.PAUSE);
filePath = bean.getTargetPath();
allTaskIt.remove();
break;
}
}
if (!StringUtils.isEmpty(filePath)) {
FileUtils.deleteFile(filePath);
}
}
synchronized (mIteratorLock) {
// 任务时间回调
for (Map.Entry<String, List<DownloadListener>> entry : mListenerListMap.entrySet()) {
List<DownloadListener> listenerList = entry.getValue();
if (listenerList != null) {
listenerList.clear();
listenerList = null;
}
}
}
// 清除数据库
try {
mDbHelper.delete(DownloadInfo.class, WhereBuilder.b("url", "=", url));
} catch (DbException e) {
Logger.e(e);
}
}