ArrayList(数组列表)与ArrayList之间数据的添加与删除操作，数组arraylist

ArrayList(数组列表)与ArrayList之间数据的添加与删除操作，数组arraylist

List<FileInfo>mAddFilesInfoList=new ArrayList<FileInfo>();
List<FileInfo>mRemoveFileInfoList=new ArrayList<FileInfo>();
List<FileInfo>mPasteFileInfoList=new ArrayList<FileInfo>();
List<FileInfo>mShowFileInfoList=new ArrayList<FileInfo>();

FileInfo[] addFileInfos=new FileInfo[mAddFileInfoList.size()];
mAddFileInfoList.toArray(addFileInfos);
for(FileInfo fileInfo : addFileInfos){
mShowFilesInfoList.add(fileInfo);
}
mShowFilesInfoList.removeAll(mRemoveFileInfoList);
mPasteFilesInfoList.removeAll(mRemoveFileInfoList);
mAddFilesInfoList.clear();
mRemoveFilesInfoList.clear();

ArrayList对象中是否包含某一项

FileInfo currentItem;
Boolean mIsContains=mPasteFilesInfoList.contains(currentItem);

得到ArrayList对象中某一项的索引

FileInfo fileInfo;
int mIndex=mPasteFilesInfoList.indexOf(fileInfo);