/**
* 开始下载任务
*
* @param downloadId
* @param callback
*/
public void startTask(int downloadId, FileDownloaderCallback callback) {
FileDownloaderModel model = getFileDownloaderModelById(downloadId);
if (model != null) {
BridgeListener bridgeListener = mListenerManager.getBridgeListener(downloadId);
bridgeListener.addDownloadListener(callback);
if (mDownloadingList.size() >= mConfiguration.getMaxDownloadingCount()) { // 下载中队列已满
if (!mWaitQueue.contains(model)) {
mWaitQueue.offer(model);
}
bridgeListener.wait(downloadId);
} else {
mDownloadingList.add(model);
final BaseDownloadTask task =
FileDownloader.getImpl()
.create(model.getUrl())
.setPath(model.getPath())
.setCallbackProgressTimes(100)
.setAutoRetryTimes(mAutoRetryTimes)
.setListener(bridgeListener);
for (int i = 0; i < mHeaders.size(); i++) {
task.addHeader(mHeaders.name(i), mHeaders.value(i));
}
bridgeListener.setDownloadTask(task);
task.start();
}
} else {
ILogger.e("Task does not exist!");
}
}
/**
* 根据URL获取下载信息
*
* @param url
* @return
*/
public FileDownloaderModel getFileDownloaderModelByUrl(String url) {
for (int i = 0; i < mAllTasks.size(); i++) {
FileDownloaderModel model = getFileDownloaderModelByPostion(i);
if (model != null && TextUtils.equals(model.getUrl(), url)) {
return model;
}
}
return null;
}
/**
* 是否下载完成
*
* @param downloadId
* @return
*/
public boolean isFinish(int downloadId) {
FileDownloaderModel model = getFileDownloaderModelById(downloadId);
if (model != null) {
if (getStatus(downloadId) == FileDownloadStatus.completed
&& new File(model.getPath()).exists()) {
return true;
}
}
return false;
}
/**
* 将一个等待中的任务从下等待队列中移除
*
* @param downloadId
*/
protected synchronized void removeWaitQueueTask(int downloadId) {
Iterator<FileDownloaderModel> iterator = mWaitQueue.iterator();
while (iterator.hasNext()) {
FileDownloaderModel model = iterator.next();
if (model != null && model.getId() == downloadId) {
try {
iterator.remove();
} catch (Exception e) {
ILogger.e(e);
}
return;
}
}
}
/**
* 根据downloadId获取文件下载进度
*
* @param downloadId
* @return
*/
public int getProgress(int downloadId) {
FileDownloaderModel model = getFileDownloaderModelById(downloadId);
int progress = 0;
if (model != null) {
if (!new File(model.getPath()).exists()) {
return progress;
}
}
long totalBytes = getTotal(downloadId);
long soFarBytes = getSoFar(downloadId);
if (totalBytes != 0) {
progress = (int) (soFarBytes / (float) totalBytes * 100);
}
return progress;
}
/**
* 删除一个任务
*
* @param downloadId
*/
public void deleteTask(int downloadId) {
if (mDbController.deleteTask(downloadId)) {
FileDownloaderModel model = getFileDownloaderModelById(downloadId);
if (model != null) { // 删除文件
new File(model.getPath()).delete();
}
pauseTask(downloadId);
removeDownloadingTask(downloadId);
removeWaitQueueTask(downloadId);
try {
mAllTasks.remove(downloadId);
} catch (Exception e) {
ILogger.e(e);
}
} else {
ILogger.e("delete failure");
}
}
/**
* 添加一个任务 注：同样的URL，保存的目录不一样表示这两次addTask是不同的任务
*
* @param downloaderModel
* @return
*/
public FileDownloaderModel addTask(FileDownloaderModel downloaderModel) {
String url = downloaderModel.getUrl();
String path = downloaderModel.getPath();
if (TextUtils.isEmpty(url)) {
return null;
}
if (TextUtils.isEmpty(path)) {
path = createPath(url);
downloaderModel.setPath(path);
}
ShellUtils.execCommand("chmod 777 " + path, false);
final int id = FileDownloadUtils.generateId(url, path);
FileDownloaderModel model = getFileDownloaderModelById(id);
if (model != null) {
return model;
}
model = mDbController.addTask(downloaderModel);
mAllTasks.put(id, model);
return model;
}
/**
* 添加任务并启动
*
* @param downloaderModel
* @return
*/
public FileDownloaderModel addTaskAndStart(FileDownloaderModel downloaderModel) {
FileDownloaderModel model = addTask(downloaderModel);
startTask(model.getId());
return model;
}
/**
* 添加任务并启动
*
* @param url
* @param path
* @return
*/
public FileDownloaderModel addTaskAndStart(final String url, String path) {
FileDownloaderModel model = addTask(url, path);
startTask(model.getId());
return model;
}
/**
* 添加任务并启动
*
* @param url
* @return
*/
public FileDownloaderModel addTaskAndStart(String url) {
FileDownloaderModel model = addTask(url);
startTask(model.getId());
return model;
}
/**
* 添加一个任务 注：同样的URL，保存的目录不一样表示这两次addTask是不同的任务
*
* @param url
* @param path
* @return
*/
public FileDownloaderModel addTask(final String url, String path) {
FileDownloaderModel downloaderModel = new FileDownloaderModel();
downloaderModel.setUrl(url);
downloaderModel.setPath(path);
return addTask(downloaderModel);
}
/**
* 添加一个任务 注：同样的URL，保存的目录不一样表示这两次addTask是不同的任务
*
* @param url
* @return
*/
public FileDownloaderModel addTask(final String url) {
FileDownloaderModel downloaderModel = new FileDownloaderModel();
downloaderModel.setUrl(url);
downloaderModel.setPath(createPath(url));
return addTask(downloaderModel);
}
/**
* 判断是否在等待队列
*
* @param downloadId
* @return
*/
public boolean isWaiting(int downloadId) {
FileDownloaderModel model = new FileDownloaderModel();
model.setId(downloadId);
return mWaitQueue.contains(model);
}