android.os.NetworkOnMainThreadException fixed

来源：互联网发布：windows 自动运行程序编辑：程序博客网时间：2024/06/10 11:10

出现这个错误,当时google了一下,问题是Android 4.0以后的版本中主线程不能直接采用异步请求相应的方式来取数据,我想google这么设计也是为了更好的提升用户体验吧!
解决这个问题有两个办法可以来使用:

setContentView(R.layout.activity_main);/*if (android.os.Build.VERSION.SDK_INT > 9) {    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();    StrictMode.setThreadPolicy(policy);}*/

在MainActivity中加我注释的代码是能解决这个问题的，但不是最佳实践。

StrictMode 参照：http://chriszeng87.iteye.com/blog/1958564

2.添加另外一个线程也能解决这个问题：

Thread thread = new Thread(){@Overridepublic void run() {// TODO Auto-generated method stubString url = "http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=false";HttpClient httpClient = new DefaultHttpClient();String responseData = "";//向指定的URL发送http请求,相应数据放在response 里面HttpResponse response;try {response = httpClient.execute(new HttpGet(url));HttpEntity entity = response.getEntity();BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));String line = "";while ((line = bufferedReader.readLine()) != null) {responseData = responseData + line;}Log.i("location06", "responseData:"+responseData);TestResult testResult = JSON.parseObject(responseData, TestResult.class);Log.i("location06", testResult.toString());} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}};thread.start();

在开发过程中,用到了访问网络的权限,故要在AndroidManifest.xml 当中添加<uses-permission android:name="android.permission.INTERNET"/> 权限

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