在android中进行网络连接检查

概述我正在尝试检查网络是否可用.但在我的模拟器中,它始终显示连接(在断开互联网之后) 我的代码中是否有任何错误.我正在连接wifi. 码： public class AndroidConnectivityActivity extends Activity{Button checkBtn;/** Called when the activity is first created. */@Ove 我正在尝试检查网络是否可用.但在我的模拟器中,它始终显示连接(在断开互联网之后)

我的代码中是否有任何错误.我正在连接wifi.

码：

public class AndroIDConnectivityActivity extends Activity{button checkBtn;/** Called when the activity is first created. */@OverrIDepublic voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.main);      checkBtn = (button) findVIEwByID(R.ID.button1);      checkBtn.setonClickListener(new VIEw.OnClickListener()      {       public voID onClick(VIEw v)       {        if(isInterneton())        {         Toast.makeText(getBaseContext(),"Connected",Toast.LENGTH_SHORT).show();        }        else        {         Toast.makeText(getBaseContext(),"Not connected",Toast.LENGTH_SHORT).show();        }       }});     }     public final boolean isInterneton()     {      ConnectivityManager connec = (ConnectivityManager) getSystemService      (Context.CONNECTIVITY_SERVICE);      if ((connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED)        ||(connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTING)        ||(connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTING)        ||(connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED))      {       return true;      }      else if ((connec.getNetworkInfo(0).getState() == NetworkInfo.State.disCONNECTED)        || (connec.getNetworkInfo(1).getState() == NetworkInfo.State.disCONNECTED))      {       return false;      }      return false;     }    }

解决方法 使用下面的代码

public static boolean isInternetAvailable(Context context)    {        boolean isInternetAvailable = false;        try        {              ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();            if(networkInfo != null && (networkInfo.isConnected()))            {                isInternetAvailable  = true;            }            }        catch(Exception exception)        {            // Do nothing        }        return isInternetAvailable;    }

并尝试真正的设备

使用Activity onCreate方法中的代码

if(isInternetAvailable(this)){Toast toast = Toast.makeText(this,"internet available",Toast.LENGTH_SHORT);        toast.show();}else{Toast toast = Toast.makeText(this,"internet not available",Toast.LENGTH_SHORT);        toast.show();}

必需的清单权限

<uses-permission        androID:name="androID.permission.INTERNET" />    <uses-permission        androID:name="androID.permission.ACCESS_NETWORK_STATE" />

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