检查互联网连接类型时应用崩溃

Question

I have written code to check the network connectivity type as follows:

ConnectivityManager conMan = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

//mobile
NetworkInfo.State mobile = conMan.getNetworkInfo(0).getState();

//wifi
NetworkInfo.State wifi = conMan.getNetworkInfo(1).getState();

I have also added the following permission to the AndroidManifest.xml file

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

But when I run the application it crashes. Does anyone know what is causing this?

Answer 1

Have you added these two permissions in your manifest file, if not add these:

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

Answer 2

Can't tell the actual problem or solution as you haven't posted any error log. Though you can try this code.

 private boolean isNetworkAvailable() {
        ConnectivityManager connectivityManager 
              = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        return activeNetworkInfo != null && activeNetworkInfo.isConnected();
    }