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
targetSdkVersion 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 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
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.
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"))
