文件夹变化监听
| publicclassRecursiveFileObserverextendsFileObserver{ |
| /** Only modification events */ |
| publicstaticint CHANGES_ONLY = CREATE | DELETE | CLOSE_WRITE | MOVE_SELF | MOVED_FROM | MOVED_TO; |
| List<SingleFileObserver> mObservers; |
| String mPath; |
| int mMask; |
| publicRecursiveFileObserver(String path){ |
| this(path, ALL_EVENTS); |
| } |
| publicRecursiveFileObserver(String path,int mask){ |
| super(path, mask); |
| mPath = path; |
| mMask = mask; |
| } |
| @Override |
| publicvoid startWatching(){ |
| if(mObservers !=null)return; |
| mObservers =newArrayList<SingleFileObserver>(); |
| Stack<String> stack =newStack<String>(); |
| stack.push(mPath); |
| while(!stack.isEmpty()){ |
| String parent = stack.pop(); |
| mObservers.add(newSingleFileObserver(parent, mMask)); |
| File path =newFile(parent); |
| File[] files = path.listFiles(); |
| if(null== files)continue; |
| for(File f : files) |
| { |
| if(f.isDirectory()&&!f.getName().equals(".")&&!f.getName().equals("..")){ |
| stack.push(f.getPath()); |
| } |
| } |
| } |
| for(SingleFileObserver sfo : mObservers){ |
| sfo.startWatching(); |
| } |
| } |
| @Override |
| publicvoid stopWatching(){ |
| if(mObservers ==null)return; |
| for(SingleFileObserver sfo : mObservers){ |
| sfo.stopWatching(); |
| } |
| mObservers.clear(); |
| mObservers =null; |
| } |
| @Override |
| publicvoid onEvent(int event,String path){ |
| switch(event) |
| { |
| caseFileObserver.ACCESS: |
| Log.i("RecursiveFileObserver","ACCESS: "+ path); |
| break; |
| caseFileObserver.ATTRIB: |
| Log.i("RecursiveFileObserver","ATTRIB: "+ path); |
| break; |
| caseFileObserver.CLOSE_NOWRITE: |
| Log.i("RecursiveFileObserver","CLOSE_NOWRITE: "+ path); |
| break; |
| caseFileObserver.CLOSE_WRITE: |
| Log.i("RecursiveFileObserver","CLOSE_WRITE: "+ path); |
| break; |
| caseFileObserver.CREATE: |
| Log.i("RecursiveFileObserver","CREATE: "+ path); |
| break; |
| caseFileObserver.DELETE: |
| Log.i("RecursiveFileObserver","DELETE: "+ path); |
| break; |
| caseFileObserver.DELETE_SELF: |
| Log.i("RecursiveFileObserver","DELETE_SELF: "+ path); |
| break; |
| caseFileObserver.MODIFY: |
| Log.i("RecursiveFileObserver","MODIFY: "+ path); |
| break; |
| caseFileObserver.MOVE_SELF: |
| Log.i("RecursiveFileObserver","MOVE_SELF: "+ path); |
| break; |
| caseFileObserver.MOVED_FROM: |
| Log.i("RecursiveFileObserver","MOVED_FROM: "+ path); |
| break; |
| caseFileObserver.MOVED_TO: |
| Log.i("RecursiveFileObserver","MOVED_TO: "+ path); |
| break; |
| caseFileObserver.OPEN: |
| Log.i("RecursiveFileObserver","OPEN: "+ path); |
| break; |
| default: |
| Log.i("RecursiveFileObserver","DEFAULT("+ event +"): "+ path); |
| break; |
| } |
| } |
| /** |
| * Monitor single directory and dispatch all events to its parent, with full path. |
| * @author uestc.Mobius <mobius@toraleap.com> |
| * @version 2011.0121 |
| */ |
| classSingleFileObserverextendsFileObserver{ |
| String mPath; |
| publicSingleFileObserver(String path){ |
| this(path, ALL_EVENTS); |
| mPath = path; |
| } |
| publicSingleFileObserver(String path,int mask){ |
| super(path, mask); |
| mPath = path; |
| } |
| @Override |
| publicvoid onEvent(int event,String path){ |
| String newPath = mPath +"/"+ path; |
| RecursiveFileObserver.this.onEvent(event, newPath); |
| } |
| } |
|
} 注意： |
