Java NetworkOnMainThread异常android studio
我在运行代码时遇到Java NetworkOnMainThread异常android studio,java,android,android-studio,Java,Android,Android Studio,我在运行代码时遇到NetworkOnMainThreadException。我有一个片段,其中显示了当我单击按钮时调用的Web服务的一些ID。下面是我的代码。我已经使用了前面提到的Asynctask,但仍然不断出现这个错误 public class AboutMeFragView extends Fragment implements ObsrvIntModel { private Button getConfButton; private UsrDataCtrl m_UsrD
NetworkOnMainThreadException
。我有一个片段
,其中显示了当我单击按钮时调用的Web服务的一些ID。下面是我的代码。我已经使用了前面提到的Asynctask
,但仍然不断出现这个错误
public class AboutMeFragView extends Fragment implements ObsrvIntModel {
private Button getConfButton;
private UsrDataCtrl m_UsrDataCtrl;
private UsrDataModel m_UsrDataModel;
private boolean m_bResUpdate;
private String retc;
public static AboutMeFragView newInstance() {
AboutMeFragView aboutMeFragment = new AboutMeFragView();
return aboutMeFragment;
}
public AboutMeFragView() {}
//inflate the data on this view from the relevant xml file fragment_about_me.xml
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_about_me, container, false);
getConfButton = (Button) rootView.findViewById(R.id.get_config_button);
getConfButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Toast.makeText(getActivity(), "Implement methods to get the configuration", Toast.LENGTH_LONG).show();
//call your model to get the data from the server and show it on the UI
enableStrictMode();
new GetCredsTask().execute();
}
});
return rootView;
}
//whenever fragment is associated with our main activity
//following method would get called
//also we make sure here that whatever navigation activity is selected
//our action bar shows up the same activity name
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((CpActivity)activity).onSectionAttached(1);
}
@Override
public void update(boolean result) {
m_bResUpdate = result;
}
public void enableStrictMode()
{
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
private class GetCredsTask extends AsyncTask<Void, Void, String> {
public GetCredsTask() {
super();
}
@Override
protected String doInBackground(Void... params) {
m_UsrDataModel = new UsrDataModel(AboutMeFragView.this);
m_UsrDataCtrl = new UsrDataCtrl(m_UsrDataModel);
m_UsrDataCtrl.execConfig();
retc = m_UsrDataModel.getM_authid();
if(m_bResUpdate != true) {
retc = "404";
}
Log.d("doInBackground", retc);
return retc;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected void onPostExecute(String s) {
Log.d("onPostExecute", retc);
if (m_bResUpdate == true)
Toast.makeText(getActivity(), s, Toast.LENGTH_LONG).show();
else
Toast.makeText(getActivity(), retc, Toast.LENGTH_LONG).show();
super.onPostExecute(s);
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
protected void execute() {
doInBackground();
}
}
}
public类AboutMeFragView扩展片段实现ObsrvIntModel{
私有按钮getConfButton;
私有UsrDataCtrl m_UsrDataCtrl;
私有UsrDataModel m_UsrDataModel;
私有布尔m_-bResUpdate;
私有字符串retc;
公共静态AboutMeFragView newInstance(){
AboutMeFragView aboutMeFragment=新的AboutMeFragView();
关于折射的返回;
}
public AboutMeFragView(){}
//从相关的xml文件片段_about_me.xml膨胀此视图上的数据
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
最终视图根视图=充气机。充气(R.layout.fragment\u关于我,容器,错误);
getConfButton=(按钮)rootView.findViewById(R.id.get\u config\u按钮);
getConfButton.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
//Toast.makeText(getActivity(),“实现获取配置的方法”,Toast.LENGTH_LONG.show();
//调用模型从服务器获取数据并在UI上显示
enableStrictMode();
新建GetCredTask().execute();
}
});
返回rootView;
}
//每当片段与我们的主要活动相关联时
//将调用以下方法
//此外,我们在此确保选择了任何导航活动
//我们的操作栏显示相同的活动名称
@凌驾
公共事务主任(活动){
超级转速计(活动);
((CpActivity)activity)。附节(1);
}
@凌驾
公共无效更新(布尔结果){
m_bResUpdate=结果;
}
public void enableStrictMode()
{
StrictMode.ThreadPolicy policy=新建StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(策略);
}
私有类GetCredsTask扩展了AsyncTask{
公共GetCredsTask(){
超级();
}
@凌驾
受保护字符串doInBackground(无效…参数){
m_UsrDataModel=新的UsrDataModel(关于efragview.this);
m_UsrDataCtrl=新的UsrDataCtrl(m_UsrDataModel);
m_UsrDataCtrl.execConfig();
retc=m_UsrDataModel.getM_authid();
如果(m_bResUpdate!=真){
retc=“404”;
}
日志d(“doInBackground”,retc);
返回retc;
}
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
}
@凌驾
受保护的void onPostExecute(字符串s){
Log.d(“onPostExecute”,retc);
如果(m_bResUpdate==true)
Toast.makeText(getActivity(),s,Toast.LENGTH_LONG).show();
其他的
Toast.makeText(getActivity(),retc,Toast.LENGTH_LONG.show();
super.onPostExecute(s);
}
@凌驾
受保护的void onProgressUpdate(void…值){
super.onProgressUpdate(值);
}
受保护的void execute(){
doInBackground();
}
}
}
谢谢您正在重写
execute()
,这将导致任务被发布到主线程上,而不是在后台执行。正常实现将任务的执行发布到后台线程,即
编辑:
public final AsyncTask More…execute(Params…Params){
返回executeOnExecutor(sDefaultExecutor,params);
}
否,因为我已经检查了该线程。我想我没有错过任何东西,但无论我错过了什么,我希望从这里得到一些帮助!感谢删除“受保护的void execute(){doInBackground();}”方法。不需要重写它。非常感谢!然而,出于好奇,我有一个问题,我们如何知道重写execute或其他可能的事情会导致我们的代码在主UI线程中执行?感谢您的帮助。您可以使用looper.getMainLooper().equals(looper.myLooper())检查正在使用的活套或线程。有关更多信息,请参阅活套参考。默认情况下,所有生命周期方法都在主线程上运行,因此,除非您将执行后置到一个单独的线程,否则如果您正在从生命周期方法之一调用一个方法,则只需假定它在主线程上运行。
public final AsyncTask<Params, Progress, Result> More ...execute(Params... params) {
return executeOnExecutor(sDefaultExecutor, params);
}