如何成为Android开发高手

264

265String filename = this.url.toString().substring(this.url.toString().lastIndexOf('/') + 1);

266

267if(filename==null || "".equals(filename.trim())){//如果获取不到文件名称

268

269for (int i = 0;; i++) {

270

271String mine = conn.getHeaderField(i);

272

273if (mine == null) break;

274

275if("content-disposition".equals(conn.getHeaderFieldKey(i).toLowerCase())){

276

277Matcher m = Pattern.compile(".*filename=(.*)").matcher(mine.toLowerCase());

278

279if(m.find()) return m.group(1);

280

281}

282

283}

284

285filename = UUID.randomUUID()+ ".tmp";//默认取一个文件名

286

287}

288

289return filename;

290

291}

292

293

294

295/**

296

297 * 开始下载文件

298

299 * @param listener 监听下载数量的变化,如果不需要了解实时下载的数量,可以设置为null

300

301 * @return 已下载文件大小

302

303 * @throws Exception

304

305 */

306

307public int download(DownloadProgressListener listener) throws Exception{

308

309try {

310

311if(this.data.size() != this.threads.length){

312

313this.data.clear();

314

315for (int i = 0; i < this.threads.length; i++) {

316

317this.data.put(i+1, this.block * i);

318

319}

320

321}

322

323for (int i = 0; i < this.threads.length; i++) {

324

325int downLength = this.data.get(i+1) - (this.block * i);

326

327if(downLength < this.block &&