如何以编程方式检查 Android 中互联网连接的可用性?

How to programmatically check availibilty of internet connection in Android?(如何以编程方式检查 Android 中互联网连接的可用性?)

问题描述

我想以编程方式检查 Android 手机/模拟器中是否有互联网连接.因此，一旦我确定存在互联网连接，我就会拨打互联网电话.

I want to check programmatically whether there is an internet connection in Android phone/emulator. So that once I am sure that an internet connection is present then I'll make a call to the internet.

所以它就像嘿模拟器！如果你有互联网连接，那么请打开这个页面，否则 doSomeThingElse();"

So its like "Hey emulator! If you have an internet connection, then please open this page, else doSomeThingElse();"

推荐答案

我自己实现的方法:

/*
 * isOnline - Check if there is a NetworkConnection
 * @return boolean
 */
protected boolean isOnline() {
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = cm.getActiveNetworkInfo();
    if (netInfo != null && netInfo.isConnected()) {
        return true;
    } else {
        return false;
    }
}

请注意，这是一个 NetworkConnection-Check.如果有 NetworkConnection，它不一定是 InternetConnection.

Be aware of that this is a NetworkConnection-Check. If there is a NetworkConnection it doesn't have to be a InternetConnection.

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