android 线程 下载 APK 显示进度 下载速度

package com.young.download.factory; import java.io.File; import java.net.URL; import java.net.URLConnection; import com.young.download.util.FileUtil; import android.os.Handler; import android.os.Message; import android.util.Log; public class updateUIThread extends Thread{ private static final String TAG = "MultiThreadDownload"; /*** 文件大小 */ private int fileSize; /** * 已经下载多少 */ private int downloadSize; /**文件的url,线程编号，文件名称*/ private String UrlStr,ThreadNo,fileName; /***保存的路径*/ private String savePath; /**下载的百分比*/ private int downloadPercent = 0; /**下载的 平均速度*/ private int downloadSpeed = 0; /**下载用的时间*/ private int usedTime = 0; /**开始时间*/ private long startTime; /**当前时间*/ private long curTime; /**是否已经下载完成*/ private boolean completed = false; private Handler handler ; /** * 下载的构造函数 * @param url 请求下载的URL * @param savePath 保存的路径 * @param fileName 保存的名字 */ public updateUIThread(Handler handler,String url,String savePath,String fileName) { this.handler = handler; this.UrlStr = url; this.savePath = savePath; this.fileName = fileName; Log.e(TAG, toString()); } @Override public void run() { try { URL url = new URL(UrlStr); URLConnection conn = url.openConnection(); fileSize = conn.getContentLength(); sendMsg(FileUtil.startDownloadMeg); Log.e(TAG, "文件一共："+fileSize); File file = new File(savePath+fileName); FileDownloadThread fdt = new FileDownloadThread(url, file); fdt.setName("downloadThread"); fdt.start(); startTime = System.currentTimeMillis(); boolean finished = false; while(!finished) { downloadSize = 0; finished = true; downloadSize+= fdt.getDownloadSize(); if(!fdt.isFinished()) { finished = false; } downloadPercent = (downloadSize*100)/fileSize; curTime = System.currentTimeMillis(); System.out.println("curTime = "+curTime+" downloadSize = "+downloadSize+" usedTime "+(int) ((curTime-startTime)/1000)); usedTime = (int) ((curTime-startTime)/1000); if(usedTime==0){ usedTime = 1; } downloadSpeed = (downloadSize/usedTime)/1024; sleep(1000);/*1秒钟刷新一次界面*/ sendMsg(FileUtil.updateDownloadMeg); } completed = true; Log.e(TAG, "ok"); sendMsg(FileUtil.endDownloadMeg); } catch (Exception e) { Log.e(TAG, "multi file error Exception :"+e.getMessage()); e.printStackTrace(); } super.run(); } /** * 得到文件的大小 * @return */ public int getFileSize() { return this.fileSize; } /** * 得到已经下载的数量 * @return */ public int getDownloadSize() { return this.downloadSize; } /** * 获取下载百分比 * @return */ public int getDownloadPercent(){ return this.downloadPercent; } /** * 获取下载速度 * @return */ public int getDownloadSpeed(){ return this.downloadSpeed; } /** * 分块下载完成的标志 * @return */ public boolean isCompleted(){ return this.completed; } @Override public String toString() { return "MultiThreadDownload [threadNum=" + ", fileSize=" + fileSize + ", UrlStr=" + UrlStr + ", ThreadNo=" + ThreadNo + ", fileName=" + fileName + ", savePath=" + savePath + "]"; } private void sendMsg(int what) { Message msg = new Message(); msg.what = what; handler.sendMessage(msg); } }