java实现文件监听(2)

来源：互联网发布：wpa2最新破解软件编辑：程序博客网时间：2024/06/15 06:03
上一个文章监听文件时java自带的，本文的文件监听代码是apache第三方的文件监听。用此包需要引入第三方。通过类直接可以调用本代码的静态方法代码如下：package com.demo.filelistener;import java.io.File;import java.util.concurrent.TimeUnit;import org.apache.commons.io.monitor.FileAlterationMonitor;import org.apache.commons.io.monitor.FileAlterationObserver;import android.os.Environment;public class MonitorFile {/* 文件 */public static void monitorFile() {if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {try {String path = "文件路径";File filPath = new File(path);// 账单if (!filPath.exists()) {filPath.mkdirs();}new Thread() {//监听事件long t= TimeUnit.MILLISECONDS.toMillis(500);String path = "文件路径";public void run() {try {//文件观察者，第一个参数是文件路径，第二个是实现FileFilter的类。通过FileAlterationMonitor 类引用开启监听FileAlterationObserver observer = new FileAlterationObserver(new File(path), new FileFilterImpl());FileAlterationMonitor monitor = new FileAlterationMonitor(t,new FileAlterationObserver[] { observer });monitor.start();} catch (Exception e) {e.printStackTrace();}}}.start();} catch (Exception e) {e.printStackTrace();}}}}demo2:import java.io.File;import java.io.FileFilter;import android.content.Context;public class FileFilterImpl implements FileFilter {private Context context =GabelApplication.getInstance() ;private SharepreferenceData sharepreferenceData = SharepreferenceData.getInstance(context);private byte[] lock = new byte[0];@Overridepublic boolean accept(File pathname) {//处理想要实现的代码return false;}}public class GabelApplication extends Application {private static GabelApplication instance;public static GabelApplication getInstance() {if (instance == null) {instance = new GabelApplication();}return instance;}@Overridepublic void onCreate() {super.onCreate();instance = this;}}
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