How to Handle Internet Connectivity Changes in Android?-javaTutorial-php.cn

How to Handle Internet Connectivity Changes in Android?

Linda Hamilton

Release： 2024-10-29 04:28:29

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How to Handle Internet Connectivity Changes in Android?

Handling Internet Connectivity Changes in Android

The question centers on the need for a Broadcast Receiver that can monitor changes in internet connectivity, as the existing code only detects connectivity changes.

To address this, here's an alternative approach:

<code class="java">public class NetworkUtil {
    public static final int TYPE_WIFI = 1;
    public static final int TYPE_MOBILE = 2;
    public static final int TYPE_NOT_CONNECTED = 0;

    public static int getConnectivityStatus(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        if (activeNetwork != null) {
            if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
                return TYPE_WIFI;

            if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
                return TYPE_MOBILE;
        }
        return TYPE_NOT_CONNECTED;
    }
}</code>

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This method determines if the device is connected to WiFi or mobile data.

<code class="java">public class NetworkChangeReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(final Context context, final Intent intent) {
        int status = NetworkUtil.getConnectivityStatus(context);
        if ("android.net.conn.CONNECTIVITY_CHANGE".equals(intent.getAction()) {
            if (status == NetworkUtil.TYPE_NOT_CONNECTED) {
                // Handle loss of internet connectivity
            } else {
                // Handle restoration of internet connectivity
            }
        }
    }
}</code>

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This BroadcastReceiver monitors connectivity state changes and triggers actions based on the current status. Remember to include the appropriate permissions and register the receiver in your AndroidManifest.xml:

<code class="xml"><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<receiver
        android:name="NetworkChangeReceiver"
        android:label="NetworkChangeReceiver" >
    <intent-filter>
        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
        <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
    </intent-filter>
</receiver></code>

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