检查互联网数据是否接收（Android）[重复]

Question

我正在使用以下代码检查互联网连接是否可用，如果手机禁用 wifi 或数据，此代码运行良好，但问题是当互联网连接期间未接收数据时此代码挂起手机....

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;
}

}

Answer 1

  <!--Constants.INTERNET_CONNECTION_URL="YOUR_WEB_SERVICE_URL/URL OF GOOGLE";-->

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

    import com.vgheater.util.Constants;

    import java.io.IOException;
    import java.net.HttpURLConnection;
    import java.net.URL;

    public class CheckConnectivity {
        private Context _context;

        public CheckConnectivity(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;
        }

        public boolean hasActiveInternetConnection() {
            if (isConnectingToInternet()) {
                try {
                    HttpURLConnection urlc = (HttpURLConnection) (new URL(Constants.INTERNET_CONNECTION_URL).openConnection());
                    urlc.setRequestProperty("User-Agent", "Test");
                    urlc.setRequestProperty("Connection", "close");
                    urlc.setConnectTimeout(5000);
                    urlc.connect();
                    return (urlc.getResponseCode() == 200);
                } catch (IOException e) {
                    return false;
                }
            } else {
                return false;
            }
        }
    }

可以如下使用..

private class InternetTask extends AsyncTask<String, Void, Boolean> {

      private ProgressDialog internetDialog = null;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            internetDialog = new ProgressDialog(RegisterUser.this);
            internetDialog.setCancelable(false);
            internetDialog.setCanceledOnTouchOutside(false);
            internetDialog.setMessage(Html.fromHtml("<font  color='#616161'>Checking Internet Connectivity.</font>"));
            internetDialog.show();
        }

        protected Boolean doInBackground(String... urls) {
            boolean response = false;
            try {
                response = checkConnectivity.hasActiveInternetConnection();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return response;
        }

        protected void onPostExecute(Boolean result) {
            internetDialog.dismiss();
            if (result) {
                //do stuff
            } else {
                new ShowToast(RegisterUser.this, "Connect to Internet & Try Again !!");


            }
        }

    }