NetworkInfo 未正确响应 phone 运行 Nougat 上的网络更改

Question

前言：这在 phone 运行 6.0.1 上工作得很好。但是在我的 phone 上是运行 7.1.1，它不是，如下所示。

build.gradle（模块：应用程序）

compileSdkVersion 25
buildToolsVersion "25.0.0"
applicationId "com.gesslar.threshvote"
minSdkVersion 19
targetSdkVersion 25

AndroidManifest.xml

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

    <receiver
        android:name=".NetworkChangeReceiver"
        android:enabled="true"
        android:exported="true">
        <intent-filter>
            <action android:name="android.net.wifi.WIFI_STATE_CHANGED"/>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
        </intent-filter>
    </receiver>

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 和数据连接开始我做了以下测试 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 NETWORK
03-08 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 INFORMATION
2) No log line written

两者都关闭后，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 activity 是首选项 activity。该应用程序不打算拥有运行时 UI，而是使用后台 IntentService 和通知。

Answer 1

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 Service，创建广播接收器的一个新实例 NetworkChangeReceiver 并使用 [=16] 注册它以收听 android.net.conn.CONNECTIVITY_CHANGE =]

registerReceiver(new NetworkChangeReceiver(), new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE"))

NetworkInfo 未正确响应 phone 运行 Nougat 上的网络更改

NetworkInfo is not properly responding to network changes on phone running Nougat

java

android

background-process

networkinfo