Question

我目前正在检测WIFI是否与以下代码连接：

        BroadcastReceiver wifiStateReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            int wifiStateExtra = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,
                    WifiManager.WIFI_STATE_UNKNOWN);
            Log.v("Log","Wifi Toggled");

        }
    };

    IntentFilter intentFilter = new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION);
    context.registerReceiver(wifiStateReceiver, intentFilter);

    wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);

无论何时打开或关闭wifi，此代码都会告诉我。我正在寻找这样的东西，只要我的网络状态发生变化，即当我有或没有互联网连接（WiFi或移动数据）时，它都会向我发送通知。我可以使用类似NetworkManger的功能来告诉我网络状态是否已更改吗？

Answer 1

看看determining and monitoring the connectivity status的官方文档。

确定您是否可以连接互联网

(venv) C:\Users\Tila>python -c "import tensorflow as tf; tf.enable_eager_exe
cution(); print(tf.reduce_sum(tf.random_normal([1000, 1000])))"
Traceback (most recent call last):
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\pywrap_t
ensorflow.py", line 58, in <module>
    from tensorflow.python.pywrap_tensorflow_internal import *
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\pywrap_t
ensorflow_internal.py", line 28, in <module>
    _pywrap_tensorflow_internal = swig_import_helper()
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\pywrap_t
ensorflow_internal.py", line 24, in swig_import_helper
    _mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, descript
ion)
  File "C:\Users\Tila\venv\lib\imp.py", line 242, in load_module
    return load_dynamic(name, filename, file)
  File "C:\Users\Tila\venv\lib\imp.py", line 342, in load_dynamic
    return _load(spec)
ImportError: DLL load failed with error code -1073741795

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\__init__.py", l
ine 24, in <module>
    from tensorflow.python import pywrap_tensorflow  # pylint: disable=unused-im
port
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\__init__
.py", line 49, in <module>
    from tensorflow.python import pywrap_tensorflow
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\pywrap_t
ensorflow.py", line 74, in <module>
    raise ImportError(msg)
ImportError: Traceback (most recent call last):
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\pywrap_t
ensorflow.py", line 58, in <module>
    from tensorflow.python.pywrap_tensorflow_internal import *
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\pywrap_t
ensorflow_internal.py", line 28, in <module>
    _pywrap_tensorflow_internal = swig_import_helper()
  File "C:\Users\Tila\Anaconda3\lib\site-packages\tensorflow\python\pywrap_t
ensorflow_internal.py", line 24, in swig_import_helper
    _mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, descript
ion)
  File "C:\Users\Tila\venv\lib\imp.py", line 242, in load_module
    return load_dynamic(name, filename, file)
  File "C:\Users\Tila\venv\lib\imp.py", line 342, in load_dynamic
    return _load(spec)
ImportError: DLL load failed with error code -1073741795


Failed to load the native TensorFlow runtime.

See https://www.tensorflow.org/install/errors

for some common reasons and solutions.  Include the entire stack trace
above this error message when asking for help.

确定您的互联网连接类型

（设备连接性可以通过移动数据，WiMAX，Wi-Fi和以太网连接来提供）

ConnectivityManager cm =
 (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean isConnected = activeNetwork != null &&
                      activeNetwork.isConnectedOrConnecting();

监控连接的变化

面向Android 7.0（API级别24）及更高版本的应用程序如果在清单中声明了广播接收器，则不会收到CONNECTIVITY_ACTION广播。如果应用向Context.registerReceiver（）注册了自己的BroadcastReceiver，并且该上下文仍然有效，则它们仍将接收CONNECTIVITY_ACTION广播。

Answer 2

Android Internet连接检查API 29 +

private static final String DEBUG_TAG = "NetworkStatusExample";

ConnectivityManager connMgr =
        (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
boolean isWifiConn = false;
boolean isMobileConn = false;
for (Network network : connMgr.getAllNetworks()) {
    NetworkInfo networkInfo = connMgr.getNetworkInfo(network);
    if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
        isWifiConn |= networkInfo.isConnected();
    }
    if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
        isMobileConn |= networkInfo.isConnected();
    }
}
Log.d(DEBUG_TAG, "Wifi connected: " + isWifiConn);
Log.d(DEBUG_TAG, "Mobile connected: " + isMobileConn);

检查网络是否已连接（wifi或移动数据）android java

2 个答案:

确定您是否可以连接互联网

确定您的互联网连接类型

监控连接的变化