Android：用于互联网连接的BroadcastReceiver

Question

我试图使我的BroadcastReceiver正常工作，但是当我断开Internet连接时出现了问题，我得到了Toast “请将该设备连接到互联网。”，另一方面，我得到的是相同的Toast “请连接设备连接到互联网。” 当我再次建立互联网连接时。 班上有什么问题吗？

 package com.bustracker; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.util.Log; 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 .getNetworkInfo(ConnectivityManager.TYPE_MOBILE); boolean isConnected = activeNetInfo != null && activeNetInfo.isConnectedOrConnecting(); if (isConnected) { Toast.makeText(context, "The device is connected to the internet ", Toast.LENGTH_SHORT).show(); Log.i("NET", "connecte" +isConnected); } else { Toast.makeText(context, "Please connect the device to the internet.", Toast.LENGTH_SHORT).show(); } } } 

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

Answer 1

问题是您正在获得移动数据连接而不是wifi，因此即使设备已连接以获取当前的NetworkInfo ，它仍然会为您带来错误消息

NetworkInfo netInfo = connectivityManager.getActiveNetworkInfo();