private Category makeCategory(FileInfo file, int type) {
Category category = new Category();
switch (type) {
case TYPE_IMAGE:
category.filePath = file.filePath;
category.alias = ((ImageFile) file).bucketName;
break;
case TYPE_AUDIO:
category.alias = ((AudioFile) file).album;
category.filePath = ((AudioFile) file).album;
break;
case TYPE_VIDEO:
category.filePath = file.filePath;
break;
}
category.uri = category.filePath;
category.init();
category.addFile(file);
return category;
}
@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);
}
}
public synchronized void initImage() {
if (null == mImageCategory) {
mImageCategory = new ConcurrentHashMap<String, Category>();
}
mImageCategory.clear();
String volumeName = "external";
Uri uri = Images.Media.getContentUri(volumeName);
String[] columns =
new String[] {
BaseColumns._ID,
MediaColumns.DATA,
MediaColumns.DISPLAY_NAME,
MediaColumns.SIZE,
MediaColumns.DATE_ADDED,
MediaColumns.DATE_MODIFIED,
ImageColumns.BUCKET_DISPLAY_NAME,
MediaColumns.MIME_TYPE
};
Cursor cur = null;
try {
cur =
mContext
.getContentResolver()
.query(uri, columns, buildSelectionByCategory(TYPE_IMAGE), null, null);
if (cur == null) {
return;
}
if (!cur.moveToFirst()) {
return;
}
do {
ImageFile file = ImageFile.getInfo(cur);
if (null == file) {
continue;
}
// 取一张图片的路径，add by yangbing
// if (MediaOpenSettingConstants.sImagePath == null) {
// if (file.fullFilePath != null && !"".equals(file.fullFilePath)) {
// MediaOpenSettingConstants.sImagePath = file.fullFilePath;
// }
// }
if (mImageCategory.containsKey(file.filePath)) {
Category category = mImageCategory.get(file.filePath);
category.addFile(file);
} else {
Category category = new Category();
category.filePath = file.filePath;
category.uri = category.filePath;
category.alias = file.bucketName;
category.init();
category.addFile(file);
mImageCategory.put(file.filePath, category);
}
} while (cur.moveToNext());
} catch (SQLiteException e) {
Log.e("FileEngine", "init image error");
} finally {
if (cur != null) {
cur.close();
}
}
}
public synchronized void initVideo() {
if (null == mVideoCategory) {
mVideoCategory = new ConcurrentHashMap<String, Category>();
}
mVideoCategory.clear();
String volumeName = "external";
Uri uri = Video.Media.getContentUri(volumeName);
String[] columns =
new String[] {
BaseColumns._ID,
MediaColumns.DATA,
MediaColumns.DISPLAY_NAME,
MediaColumns.SIZE,
MediaColumns.DATE_ADDED,
MediaColumns.DATE_MODIFIED,
VideoColumns.DURATION,
MediaColumns.MIME_TYPE
};
Cursor cur = null;
try {
cur =
mContext
.getContentResolver()
.query(uri, columns, buildSelectionByCategory(TYPE_AUDIO), null, null);
if (cur == null) {
return;
}
if (!cur.moveToFirst()) {
return;
}
do {
VideoFile file = VideoFile.getInfo(cur);
if (null == file) {
continue;
}
if (mVideoCategory.containsKey(file.filePath)) {
Category category = mVideoCategory.get(file.filePath);
category.addFile(file);
} else {
Category category = new Category();
category.filePath = file.filePath;
category.uri = category.filePath;
category.init();
category.addFile(file);
mVideoCategory.put(file.filePath, category);
}
} while (cur.moveToNext());
} catch (SQLiteException e) {
Log.e("FileEngine", "init video error");
} finally {
if (cur != null) {
cur.close();
}
}
}
public synchronized void initAudio() {
if (null == mAudioCategory) {
mAudioCategory = new ConcurrentHashMap<String, Category>();
}
mAudioCategory.clear();
Uri uri = Audio.Media.EXTERNAL_CONTENT_URI;
String[] columns =
new String[] {
BaseColumns._ID,
MediaColumns.DATA,
MediaColumns.DISPLAY_NAME,
MediaColumns.SIZE,
MediaColumns.DATE_ADDED,
MediaColumns.DATE_MODIFIED,
AudioColumns.DURATION,
AudioColumns.ARTIST,
AudioColumns.ALBUM,
AudioColumns.ALBUM_ID,
MediaColumns.MIME_TYPE,
MediaColumns.TITLE
};
Cursor cur = null;
try {
cur =
mContext
.getContentResolver()
.query(uri, columns, buildSelectionByCategory(TYPE_AUDIO), null, null);
if (cur == null) {
return;
}
if (!cur.moveToFirst()) {
return;
}
do {
AudioFile file = AudioFile.getInfo(cur);
if (null == file) {
continue;
}
// 取一首歌曲的路径，add by yangbing
// if (MediaOpenSettingConstants.sMusicPath == null) {
// if (file.fullFilePath != null && !"".equals(file.fullFilePath)) {
// MediaOpenSettingConstants.sMusicPath = file.fullFilePath;
// }
// }
if (mAudioCategory.containsKey(file.album)) {
Category category = mAudioCategory.get(file.album);
category.addFile(file);
} else {
Category category = new Category();
category.filePath = file.album;
category.uri = category.filePath;
category.alias = file.album;
category.addFile(file);
mAudioCategory.put(category.filePath, category);
}
} while (cur.moveToNext());
} catch (SQLiteException e) {
Log.e("FileEngine", "init audio error");
} finally {
if (cur != null) {
cur.close();
}
}
}