android 递归监控目录或者文件

ゞ浴缸里的玫瑰 2022-06-15 01:37 197阅读 0赞

package com.test.sandbox.controller.control.export.chat;
    
    import android.os.FileObserver;
    
    import java.io.File;
    import java.util.ArrayList;
    import java.util.LinkedList;
    import java.util.List;
    
    
    class DirChangedListener extends FileObserver {
        private final static String TAG = "DirChangedListener";
        public static final int MULTI_DIRS_TYPE = 0;
        public static final int ONE_DIR_TYPE = 1;
    
    
        private List<DirChangedListener> mFileObserverList = new ArrayList<DirChangedListener>();
        private String mAbsolutePath;
    
        public DirChangedListener(String path, int type) {
            super(path);
            mAbsolutePath = path;
            if (type == MULTI_DIRS_TYPE) {
                setFileObserver(path);
            }
        }
    
        @Override
        public void onEvent(int event, String path) {
            final int action = event & FileObserver.ALL_EVENTS;
            switch (action) {
                case FileObserver.CREATE:
                    android.util.Log.d(TAG, "event: create, path: " + mAbsolutePath + File.separator
                            + path);
                    break;
            }
        }
    
        private List<File> setFileObserver(String dir) {
            ArrayList<File> fileList = new ArrayList<File>();
            LinkedList<File> list = new LinkedList<File>();
            File fileDir = new File(dir);
            File file[] = fileDir.listFiles();
            mFileObserverList.add(this);
            for (int i = 0; i < file.length; i++) {
                if (file[i].isDirectory()) {
                    list.add(file[i]);
                    DirChangedListener fileObserver = new DirChangedListener(
                            file[i].getAbsolutePath(),
                            DirChangedListener.ONE_DIR_TYPE);
                    mFileObserverList.add(fileObserver);
                }
            }
            File tmp;
            while (!list.isEmpty()) {
                tmp = list.removeFirst();
                if (tmp.isDirectory()) {
                    DirChangedListener fileObserver = new DirChangedListener(
                            tmp.getAbsolutePath(),
                            DirChangedListener.ONE_DIR_TYPE);
                    mFileObserverList.add(fileObserver);
                    file = tmp.listFiles();
                    if (file == null)
                        continue;
                    for (int i = 0; i < file.length; i++) {
                        if (file[i].isDirectory()) {
                            list.add(file[i]);
                            DirChangedListener fileObserver1 = new DirChangedListener(
                                    file[i].getAbsolutePath(),
                                    DirChangedListener.ONE_DIR_TYPE);
                            mFileObserverList.add(fileObserver1);
                        }
                    }
                }
            }
            return fileList;
        }
    
        public void startDirWatch() {
            // TODO Auto-generated method stub
            for (DirChangedListener listener : mFileObserverList) {
                listener.startWatching();
            }
        }
    
        public void stopDirWatch() {
            // TODO Auto-generated method stub
            for (DirChangedListener listener : mFileObserverList) {
                listener.stopWatching();
            }
        }
    }