即使数据流量处于活动状态，ConnectivityManager getActiveNetworkInfo() 也始终为 null

发布于 2024-11-08 19:54:24 字数 988 浏览 4 评论 0原文

我正在开发一个 Android 项目，我需要检查互联网连接。我在网上搜索了一下，在 stackoverflow 上找到了解决方案。但是，我在检查互联网状态时遇到问题。我已经到处搜索，但找不到任何解决我的问题的方法。

这是清单：

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

这是检查互联网是否已连接的代码：

cm = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
if (cm != null) {
NetworkInfo ni = cm.getActiveNetworkInfo();
isConnected = (ni != null && ni.isAvailable() && ni.isConnected()) ? true : false;
}

问题是，即使 TYPE_MOBILE 数据流量处于活动状态，ni 变量也始终为空。访问运营商的互联网流量这是测试的正确方法吗？或者我必须使用 TelephonyManager？这很奇怪，因为我使用了 getNetworkInfo()[] 并对其进行了调试，TYPE_MOBILE 的 HSPA 出现在那里，但 isAvalaible 始终为 false 并且 getState() = DISCONNECTED。但是，我启用了运营商的数据流量并正在工作（在其他应用程序中）

[编辑]：顺便说一句，我直接在设备中而不是在模拟器中测试它:)。

提前致谢。问候。

原文

i'm working on a android project and i had the need to check for internet connection. i searched the web and i found a solution here on stackoverflow. However, i'm having problems on checking the internet state. I already searched everywhere but i can't find any solution for my problem.

Here is the manifest:

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

Here is the code for checking if internet is connected:

cm = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
if (cm != null) {
NetworkInfo ni = cm.getActiveNetworkInfo();
isConnected = (ni != null && ni.isAvailable() && ni.isConnected()) ? true : false;
}

The problem is that even with TYPE_MOBILE data traffic active the ni variable is always null. To access the operators internet traffic is this the correct way of testing it? Or i have to use TelephonyManager?
It's wierd because i used getNetworkInfo()[] and debugged it, the HSPA for TYPE_MOBILE appears there but isAvalaible is always false and getState() = DISCONNECTED. However i have operator's data traffic enabled and working (in other applications)

[EDIT]: by the way im testing it directly in the device not in emulator :).

Thanks in advance. Regards.

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