如何成为Android开发高手

核心提示：200201conn.connect();202203printResponseHeader(conn);204205if (conn.getResponseCode()==200) {206207this.fileSize = conn.getContentLength();//根据响应获取文件大小208209if

200

201conn.connect();

202

203printResponseHeader(conn);

204

205if (conn.getResponseCode()==200) {

206

207this.fileSize = conn.getContentLength();//根据响应获取文件大小

208

209if (this.fileSize <= 0) throw new RuntimeException("1无法获知文件大小 ");

210

211

212

213String filename = getFileName(conn);

214

215this.saveFile = new File(fileSaveDir, filename);/* 保存文件 */

216

217Map logdata = fileService.getData(downloadUrl);

218

219if(logdata.size()>0){

220

221for(Map.Entry entry : logdata.entrySet())

222

223data.put(entry.getKey(), entry.getValue()+1);

224

225}

226

227this.block = this.fileSize / this.threads.length + 1;

228

229if(this.data.size()==this.threads.length){

230

231for (int i = 0; i < this.threads.length; i++) {

232

233this.downloadSize += this.data.get(i+1)-(this.block * i);

234

235}

236

237print("已经下载的长度"+ this.downloadSize);

238

239}

240

241}else{

242

243throw new RuntimeException("2服务器响应错误 ");

244

245}

246

247} catch (Exception e) {

248

249print(e.toString());

250

251throw new RuntimeException("3连接不到下载路径 ");

252

253}

254

255}

256

257/**

258

259 * 获取文件名

260

261 */

262

263private String getFileName(HttpURLConnection conn) {