/** * 下载文件线程 * */ public class downloadApkThread extends Thread { @Override public void run() { try { // 判断SD卡是否存在,并且是否具有读写权限 if (Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) { // 获得存储卡的路径 String sdpath = Environment.getExternalStorageDirectory() + "/"; mSavePath = sdpath + "my"; URL url = new URL(mVersionInfo.appurl); // 创建连接 HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setConnectTimeout(300000); conn.setReadTimeout(300000); conn.connect(); // 获取文件大小 int length = conn.getContentLength(); // 创建输入流 InputStream is = conn.getInputStream(); File file = new File(mSavePath); // 判断文件目录是否存在 if (!file.exists()) { file.mkdir(); } File apkFile = new File(mSavePath, mVersionInfo.appname); FileOutputStream fos = new FileOutputStream(apkFile); int count = 0; // 缓存 byte buf[] = new byte[1024]; // 写入到文件中 do { int numread = is.read(buf); count += numread; // 计算进度条位置 mProgress = (int) (((float) count / length) * 100); // 更新进度 mHandler.sendEmptyMessage(DOWNLOAD); if (numread <= 0) { // 下载完成 mHandler.sendEmptyMessage(DOWNLOAD_FINISH); break; } // 写入文件 fos.write(buf, 0, numread); } while (!mCancelUpdate);// 点击取消就停止下载. fos.close(); is.close(); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } // 取消下载对话框显示 cancel(); } }
Android下载文件
最新推荐文章于 2022-10-10 13:57:27 发布