package de.pixart.messenger.utils; import android.os.FileObserver; import java.io.File; import java.util.ArrayList; import java.util.List; import java.util.Stack; /** * Copyright (C) 2012 Bartek Przybylski * Copyright (C) 2015 ownCloud Inc. * Copyright (C) 2016 Daniel Gultsch */ public abstract class ConversationsFileObserver { private final String path; private final List mObservers = new ArrayList<>(); public ConversationsFileObserver(String path) { this.path = path; } public synchronized void startWatching() { Stack stack = new Stack<>(); stack.push(path); while (!stack.empty()) { String parent = stack.pop(); mObservers.add(new SingleFileObserver(parent, FileObserver.DELETE)); final File path = new File(parent); final File[] files = path.listFiles(); if (files == null) { continue; } for(File file : files) { if (file.isDirectory() && !file.getName().equals(".") && !file.getName().equals("..")) { stack.push(file.getPath()); } } } for(FileObserver observer : mObservers) { observer.startWatching(); } } public synchronized void stopWatching() { for(FileObserver observer : mObservers) { observer.stopWatching(); } mObservers.clear(); } abstract public void onEvent(int event, String path); private class SingleFileObserver extends FileObserver { private final String path; public SingleFileObserver(String path, int mask) { super(path, mask); this.path = path; } @Override public void onEvent(int event, String filename) { ConversationsFileObserver.this.onEvent(event, path+'/'+filename); } } }