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实验六 | ||
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一.实验目的 | ||
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掌握Android网络访问方法<br> | ||
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二.实验内容 | ||
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在个人目录中创建一个表示数据的XML或JSON文件<br> | ||
数据文件代码提交之后从GitHub获取文件URL<br> | ||
在应用中通过网络编程访问GitHub的数据文件<br> | ||
在应用中解析并显示文件所包含的数据;<br> | ||
将应用运行结果截图。<br> | ||
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三、实验步骤 | ||
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1、在自己的Github库中创建一个JSON数据文件<br> | ||
2、在子线程中新建一个URL对象,使用url.openConnection()去访问URL,获得请求<br> | ||
3、使用输入流去读取请求的数据(也就是JSON的数据类型转换成String)<br> | ||
4、解析JSON,通过键取得对应的值,添加到数据类型ArrayList中<br> | ||
5、返回主线程去更新UI<br> | ||
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四、实验截图 | ||
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![](https://github.com/zglx/android-labs-2018/blob/master/soft1614080902231/r6.png) | ||
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四、实验体会 | ||
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这次实验获取JSON和解析JSON方法不难,就是更新UI有点困难,因为刚开始不知道子线程如果用来更新UI会造成程序终止,百度后,使用 runOnUiThread返回主线程后就可以了 |