网络连接不能在片段中工作

在问这个问题之前，我曾在Google &上搜索。但绝望。网络连接不能在片段中工作

问题是连接吐司显示当互联网缺席。

这是我的代码，我需要你的敏锐建议。

protected boolean isInternetOn() { 

    ConnectivityManager connec = (ConnectivityManager)getActivity().getSystemService(getActivity().CONNECTIVITY_SERVICE); 

    //check for network connections 
    if(connec.getNetworkInfo(0).getState()== android.net.NetworkInfo.State.CONNECTED|| 
      connec.getNetworkInfo(0).getState()== android.net.NetworkInfo.State.CONNECTING|| 
      connec.getNetworkInfo(1).getState()== android.net.NetworkInfo.State.CONNECTING|| 
      connec.getNetworkInfo(1).getState()== android.net.NetworkInfo.State.CONNECTED){ 

     Toast.makeText(getActivity(), "Connected", Toast.LENGTH_LONG).show(); 
     return true; 
    }else if (connec.getNetworkInfo(0).getState()== android.net.NetworkInfo.State.DISCONNECTED|| 
      connec.getNetworkInfo(1).getState()== android.net.NetworkInfo.State.DISCONNECTED){ 
     Toast.makeText(getActivity(), "Not Connected", Toast.LENGTH_LONG).show(); 
     return false; 
    } 
    return false; 
}

现在把这块isInternetOn方法在我abstract类扩展Fragment

这里是结构

public abstract class HomeTabFragment extends Fragment 
    // 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
    } 


    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) 
    { 

     if (RootView == null) 
     { 
     isInternetOn(); 
     } 
    } 
Here return view//

我试过，

ConnectivityManager connec = (ConnectivityManager)getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);

是否有任何人符合这个问题？任何帮助将不胜感激。

来源

2015-12-29 Code Error

你检查在其他actvities这个代码？ –

@beardedbeast它在活动部分工作正常。但抽象类有问题。 –

试试这个：

ConnectivityManager connec = (ConnectivityManager)getActivity().getSystemService(getActivity().CONNECTIVITY_SERVICE);

变化

ConnectivityManager connec = (ConnectivityManager)getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);

来源

2015-12-29 11:53:03

#Quang Doan先生。感谢您的关注。我已经尝试过。但不工作。此代码在'Activity'部分工作。但在这里错误返回 –

我跟着http://stackoverflow.com/questions/16481334/check-网络连接片段 –

尝试这种方式。可帮助您

public boolean isConnectingToInternet(){ 
ConnectivityManager connectivity = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE); 
    if (connectivity != null) 
    { 
    NetworkInfo[] info = connectivity.getAllNetworkInfo(); 
    if (info != null) 
     for (int i = 0; i < info.length; i++) 
      if (info[i].getState() == NetworkInfo.State.CONNECTED) 
      { 
      return true; 
      } 
     } 
     return false; 
    }

和片段类

if (RootView!= null) 
{ 
    isConnectingToInternet(); 
}

来源

2015-12-29 12:27:52

还没有工作。非常奇怪的情况 –

更新你的logcat –

两次打印'返回true;' –

You can write one class for check internet connection: 

import android.content.Context; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 

public class ConnectionDetector { 

    private Context _context; 

    public ConnectionDetector(Context context){ 
     this._context = context; 
    } 

    public boolean isConnectingToInternet(){ 
     ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE); 
      if (connectivity != null) 
      { 
       NetworkInfo[] info = connectivity.getAllNetworkInfo(); 
       if (info != null) 
        for (int i = 0; i < info.length; i++) 
         if (info[i].getState() == NetworkInfo.State.CONNECTED) 
         { 
          return true; 
         } 

      } 
      return false; 
    } 
} 

And After that you can check connection in your fragment by using below code: 

@Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) 
    { 
     cd = new ConnectionDetector(getActivity()); 
     isInternetPresent = cd.isConnectingToInternet(); 

     if (isInternetPresent) { 
      // Internet Connection is Present 
      Toast.makeText(getActivity(), "Connected", Toast.LENGTH_LONG).show(); 
     } else { 
      // Internet connection is not present 
      Toast.makeText(getActivity(), "Not Connected!", Toast.LENGTH_LONG).show(); 
     } 

     // Inflate the layout for this fragment 
     return inflater.inflate(R.layout.fragment_blank, container, false); 
    }

来源

2015-12-29 12:48:42

#vKuldeep Kulkarni：我测试过了。 –

网络连接不能在片段中工作

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