Java android应用程序的android.os.NetworkOnMainThreadException
我试图调用一个包含json数据的urlJava android应用程序的android.os.NetworkOnMainThreadException,java,android,httpurlconnection,Java,Android,Httpurlconnection,我试图调用一个包含json数据的url String response = null; try { URL url = new URL("https://demorul.com"); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setReadTimeout(10000); conn.setConnectTimeout(1000
String response = null;
try {
URL url = new URL("https://demorul.com");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(10000);
conn.setRequestMethod("GET");
conn.setRequestProperty("Content-Type", "application/json;odata=verbose");
conn.setRequestProperty("Accept", "application/json;odata=verbose");
// read the response
InputStream in = new BufferedInputStream(conn.getInputStream());
response = convertStreamToString(in);
} catch (MalformedURLException e) {
Log.e(TAG, "MalformedURLException: " + e.getMessage());
} catch (ProtocolException e) {
Log.e(TAG, "ProtocolException: " + e.getMessage());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
return response;
url将返回json数据。但是我得到了android.os.NetworkOnMainThreadException错误,这意味着它将转到最后一个catch语句
在AndroidManifest.xml文件中,我设置了
<uses-permission android:name="android.permission.INTERNET"/>
感谢当应用程序尝试在其主线程上执行网络操作时,会引发此异常。在AsyncTask中运行代码您必须进行网络调用,异步。因为无法在主应用程序线程上进行网络调用。Hi Yuri的副本,我看到了该罚单,但他使用了其他方法。我正在使用other.Hi macos,nut AsyncTask将首先执行,然后我们可以使用它们的值,但我想在需要之前调用函数。