java–NetworkInfo没有正确响应运行Nougat的手机上的网络更改

概述前言：在运行6.0.1的手机上运行正常.但是在运行7.1.1的手机上,它不是,如下所示.build.gradle(模块：app)compileSdkVersion 25 buildToolsVersion '25.0.0' applicationId 'com.gesslar.threshvote' minSdkVersion 19 targetSdkVer

前言：在运行6.0.1的手机上运行正常.但是在运行7.1.1的手机上,它不是,如下所示.

build.gradle(模块：app)

compileSdkVersion 25buildToolsversion "25.0.0"applicationID "com.gesslar.threshVote"minSdkVersion 19targetSdkVersion 25

AndroIDManifest.xml中

NetworkUtil.java
我有一个BroadcastReceiver,我用它来简单地调用NetworkUtil.updateNetworkStatus(context);
public static void updateNetworkStatus(Context context) {    final ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);    final NetworkInfo activeNetwork = connectivityManager.getActiveNetworkInfo();    if (activeNetwork == null) {        Log.d(TAG,"NO CONNECTION INFORMATION");        return;    }    if (activeNetwork.isConnected()) {        Log.d(TAG,"WE ARE CONNECTED TO A NETWORK");    } else {        Log.d(TAG,"WE ARE NOT CONNECTED TO A NETWORK");        return;    }    Log.d(TAG,"NETWORK TYPE: " + activeNetwork.getTypeName());}
从WiFi和数据连接开始我已经完成了以下测试
关闭WiFi
03-08 20:15:04.664 29796-29796/com.gesslar.threshvote D/NetworkUtil: NO CONNECTION INFORMATION
打开WiFi：
03-08 20:15:26.333 29796-29796/com.gesslar.threshvote D/NetworkUtil: WE ARE CONNECTED TO A NETWORK03-08 20:15:26.333 29796-29796/com.gesslar.threshvote D/NetworkUtil: NETWORK TYPE: MOBILE
关闭数据：
No log line written
打开数据：
No log line written
关闭WiFi然后关闭数据：
1) 03-08 20:17:13.029 29796-29796/com.gesslar.threshvote D/NetworkUtil: NO CONNECTION INFORMATION2) No log line written
关闭两个,打开WiFi：
03-08 20:18:00.198 29796-29796/com.gesslar.threshvote D/NetworkUtil: NO CONNECTION INFORMATION^ showed as soon as it started seeking for WiFi,but no further log line was written when WiFi became active.
我对结果感到非常困惑.我在其他地方看到我应该在运行时绑定它,但是,我唯一的活动是Preferences活动.该应用程序不具有运行时UI,而是使用后台IntentService和Notifications.最佳答案根据android docs,
Apps targeting AndroID 7.0 (API level 24) and higher do not receive
  CONNECTIVITY_ACTION broadcasts if they declare the broadcast receiver
  in their manifest. Apps will still receive CONNECTIVITY_ACTION
  broadcasts if they register their broadcastReceiver with
  Context.registerReceiver() and that context is still valID.
所以你需要做的是启动一个服务,创建一个广播接收器NetworkChangeReceiver的新实例并注册它以通过使用它来监听它到androID.net.conn.CONNECTIVITY_CHANGE
registerReceiver(new NetworkChangeReceiver(),new IntentFilter("androID.net.conn.CONNECTIVITY_CHANGE"))
          总结       
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