/**
* 删除文件
*
* @param path
* @param type
*/
public void deleteFile(String path, int type) {
File file = new File(path);
boolean ret = false;
if (file.exists()) {
ret = file.delete();
} else {
ret = true;
}
if (ret) {
Category category = null;
String key = MediaFileUtil.getPathFromFilepath(path);
if (type == TYPE_AUDIO) {
category = mAudioCategory.get(key);
mDeletedAudioList.add(path);
}
if (type == TYPE_IMAGE) {
category = mImageCategory.get(key);
mDeletedImageList.add(path);
}
if (type == TYPE_VIDEO) {
category = mVideoCategory.get(key);
mDeletedVideoList.add(path);
}
if (null != category) {
category.deleteFile(path);
}
removeDataFromDB(path, type);
}
mFileObserver.deleteFinished(path, ret);
}
@SuppressWarnings("unchecked")
private void compareFile(
Cursor cur,
ConcurrentHashMap<String, Category> categoryMap,
ArrayList<String> deletedFileList,
int type) {
ArrayList<FileInfo> filesRemoved = new ArrayList<FileInfo>();
ArrayList<FileInfo> filesAdded = new ArrayList<FileInfo>();
// 把缓存中的拷贝一份到tmp中，方便比对
HashMap<String, Category> tmp = new HashMap<String, Category>();
Iterator<Category> values = categoryMap.values().iterator();
while (values.hasNext()) {
Category cat = values.next();
Category newCat = new Category();
newCat.filePath = cat.filePath;
newCat.files = (ArrayList<FileInfo>) cat.files.clone();
newCat.size = cat.size;
tmp.put(cat.filePath, newCat);
}
HashSet<String> filesInDB = new HashSet<String>();
do {
FileInfo file = extractFileInfo(cur, type);
if (null == file) {
continue;
}
// 查找是否有这个文件夹
if (tmp.containsKey(getCategoryKey(file, type))) {
Category category = tmp.get(getCategoryKey(file, type));
int size = category.files.size();
boolean bFind = false;
// 找到这个文件则从tmp中删除，说明原来已经有了
for (int i = size - 1; i >= 0; --i) {
FileInfo info = category.files.get(i);
if (0 == info.fullFilePath.compareTo(file.fullFilePath)) {
bFind = true;
category.files.remove(i);
break;
}
}
if (!bFind) {
// 没有找到则加入缓存
if (!deletedFileList.contains(file.fullFilePath)) {
if (categoryMap.get(getCategoryKey(file, type)).addFile(file)) {
filesAdded.add(file);
// Log.d("onChange", "add " + file.fullFilePath);
}
}
}
} else {
if (categoryMap.containsKey(getCategoryKey(file, type))) {
if (!deletedFileList.contains(file.fullFilePath)) {
if (categoryMap.get(getCategoryKey(file, type)).addFile(file)) {
filesAdded.add(file);
// Log.d("onChange", "add " + file.fullFilePath);
}
}
} else {
if (!deletedFileList.contains(file.fullFilePath)) {
// 没有这个文件夹则新建一个文件夹，加入缓存
// Log.d("onChange", "add category " + file.filePath);
// Log.d("onChange", "add " + file.fullFilePath);
Category category = makeCategory(file, type);
filesAdded.add(file);
categoryMap.put(category.filePath, category);
}
}
}
filesInDB.add(file.fullFilePath);
} while (cur.moveToNext());
if (mFileObserver != null && filesAdded != null && !filesAdded.isEmpty()) {
mFileObserver.filesAdded(filesAdded, type);
}
// tmp中剩下的则是被删除的文件
Collection<Category> categories = tmp.values();
Object[] ar = categories.toArray();
int size = ar.length;
for (int i = 0; i < size; ++i) {
Object category = ar[i];
filesRemoved.addAll(((Category) category).files);
}
// 把删除的文件从缓存中删除
for (FileInfo info : filesRemoved) {
Category category = categoryMap.get(getCategoryKey(info, type));
if (null != category) {
// Log.d("onChange", "delete file " + info.fullFilePath);
category.deleteFile(info.fullFilePath);
if (category.files.isEmpty()) {
categoryMap.remove(category.filePath);
}
}
}
Iterator<String> it = deletedFileList.iterator();
while (it.hasNext()) {
if (!filesInDB.contains(it.next())) {
it.remove();
}
}
if (mFileObserver != null && filesRemoved != null && !filesRemoved.isEmpty()) {
mFileObserver.filesRemoved(filesRemoved, type);
}
}