Android实现多线程下载文件的方法

} else { downloadSize+=len;

} }

//下载完成设为true this.finished = true;

bis.close(); fos.close();

} catch (IOException e) { e.printStackTrace();

} }

public boolean isFinished(){ return finished;

} public int getDownloadSize() {

return downloadSize; }

} public class FileDownloadThread extends Thread{

private static final int BUFFER_SIZE=1024; private URL url;

private File file; private int startPosition;

private int endPosition; private int curPosition;//标识当前线程是否下载完成

private boolean finished=false; private int downloadSize=0;

public FileDownloadThread(URL url,File file,int startPosition,int endPosition){ this.url=url;

this.file=file; this.startPosition=startPosition;

this.curPosition=startPosition; this.endPosition=endPosition;

} @Overridepublic void run() {

BufferedInputStream bis = null; RandomAccessFile fos = null;

byte[] buf = new byte[BUFFER_SIZE]; URLConnection con = null;

try { con = url.openConnection();

con.setAllowUserInteraction(true); //设置当前线程下载的起止点

con.setRequestProperty("Range", "bytes=" + startPosition + "-" + endPosition); Log.i("bb", Thread.currentThread().getName()+" bytes=" + startPosition + "-" + endPosition);

//使用java中的RandomAccessFile 对文件进行随机读写操作 fos = new RandomAccessFile(file, "rw");

//设置写文件的起始位置 fos.seek(startPosition);

bis = new BufferedInputStream(con.getInputStream()); //开始循环以流的形式读写文件

10/12 首页上一页 8 9 10 11 12 下一页尾页

Android实现多线程下载文件的方法

一文详解Jetpack Android新一代导航管理Navigation

横竖屏切换导致页面频繁重启screenLayout解析

Andriod事件分发事件由来初识

Android 匿名内存深入分析

5分钟学会Android设计模式之策略模式Strategy Pattern

解决Android Studio 出现“Cannot resolve symbol”

Flutter学习之创建一个内嵌的navigation详解

Android Flutter实现在多端运行的扫雷游戏

Android Jetpack组件Lifecycle源码解析

React Native之在Android上添加阴影的实现