不幸的是应用程序的同时检查网络越来越停止 [英] unfortunately app is getting stopped while checking for network

问题描述

我使用下面的code，以检查在我的应用程序的网络连接。

I am using the following code to check for the internet connection throughout my app.

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.widget.Toast;

public class ConnectionChangeReceiver extends BroadcastReceiver
{
  @Override
  public void onReceive( Context context, Intent intent )
  {
    ConnectivityManager connectivityManager = (ConnectivityManager) 
                       context.getSystemService( Context.CONNECTIVITY_SERVICE );
    NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
    NetworkInfo mobNetInfo = connectivityManager.getNetworkInfo
                                             (ConnectivityManager.TYPE_MOBILE );
    if ( activeNetInfo != null )
    {
      Toast.makeText( context, "Active Network Type : " + 
                       activeNetInfo.getTypeName(), Toast.LENGTH_SHORT ).show();
    }
    if( mobNetInfo != null )
    {
      Toast.makeText( context, "Mobile Network Type : " + 
                          mobNetInfo.getTypeName(), Toast.LENGTH_SHORT ).show();
    }
  }
}

和我定义所需的权限清单文件

And I have defined required permission in the manifest file

每当我尝试断开/连接使用F8键，我会收到不幸的是APP已停止，而我没有得到在任何的logcat打印网络。 我能知道什么是错误的，我在做什么？

Whenever I try to disconnect/connect the network using F8 key I will receive "UNFORTUNATELY APP HAS STOPPED", and I am not getting any print in logcat. Can I know what is the mistake I am doing?

推荐答案

你有没有在的Andr​​oidManifest.xml

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

如果您在上面添加，然后检查该code：

if you have added above then check this code:

<receiver android:name=".UpdateReceiver" >
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
        </intent-filter>
    </receiver>

和

public class UpdateReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {


          ConnectivityManager connectivityManager = (ConnectivityManager) 
                                       context.getSystemService(Context.CONNECTIVITY_SERVICE );
          NetworkInfo activeNetInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
          boolean isConnected = activeNetInfo != null && activeNetInfo.isConnectedOrConnecting();   
          if (isConnected)       
              Log.i("NET", "connecte" +isConnected);   
          else Log.i("NET", "not connecte" +isConnected);
        }
    }

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