第4章 在线音乐播放器完整版客户端-设计电子课件.pptx

移动互联网应用开发技术;本章大纲; 1 完整版功能简介; 1 完整版功能简介; 2 完整版开发结构; 3 Layout Creator插件; 4 Intent，意图; 5 Broadcast，广播; 6 进度条更新;下面代码的功能为 [填空1] protected String doInBackground(HttpUriRequest... arg0) { HttpUriRequest request = arg0[0]; String result = null; HttpClient client = new DefaultHttpClient(); try { HttpResponse response = client.execute(request); result = EntityUtils.toString(response.getEntity(), "UTF-8"); } catch (ClientProtocolException e1) { e1.printStackTrace(); } return result; } ;阅读下面的代码，请描述一下代码各部分所完成的功能；（10分） //5.1 [填空1] Intent intent = new Intent(mContext, MusicService.class); //5.2 [填空2] ArrayList<String> musicList = new ArrayList<String>(); //5.3 [填空3] for (Music music2 : mMusics) { musicList.add(HTTP_ROOT + music2.getPath()); } intent.putExtra(MusicService.KEY_COMMAND, MusicService.CMD_INIT); //5.4 [填空4] intent.putStringArrayListExtra(MusicService.KEY_MUSIC_LIST, musicList); //5.5 [填空5] startService(intent);;感谢观看！移动互联网应用开发技术;本章大纲; 1 完整版功能简介; 1 完整版功能简介; 2 完整版开发结构; 3 Layout Creator插件; 4 Intent，意图; 5 Broadcast，广播; 6 进度条更新;下面代码的功能为 [填空1] protected String doInBackground(HttpUriRequest... arg0) { HttpUriRequest request = arg0[0]; String result = null; HttpClient client = new DefaultHttpClient(); try { HttpResponse response = client.execute(request); result = EntityUtils.toString(response.getEntity(), "UTF-8"); } catch (ClientProtocolException e1) { e1.printStackTrace(); } return result; } ;阅读下面的代码，请描述一下代码各部分所完成的功能；（10分） //5.1 [填空1] Intent intent = new Intent(mContext, MusicService.class); //5.2 [填空2] ArrayList<String> musicList = new ArrayList<String>(); //5.3 [填空3] for (Music music2 : mMusics) { musicList.add(HTTP