Java how to check internet connection in android

To check the internet connection in an Android app, you can use the isConnected method of the ConnectivityManager class and the TYPE_WIFI and TYPE_MOBILE constants.

The ConnectivityManager class provides information about the device's connectivity status, including whether the device is connected to the internet. The isConnected method returns a boolean value indicating whether the device is connected to the internet. The TYPE_WIFI and TYPE_MOBILE constants represent the type of internet connection, either WiFi or mobile data, respectively.

Here is an example of how to check the internet connection in an Android app using the ConnectivityManager class:

ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
boolean isConnected = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected() ||
                     cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnected();
if (isConnected) {
  // The device is connected to the internet.
} else {
  // The device is not connected to the internet.
}

In this example, the ConnectivityManager instance is obtained using the getSystemService method of the Context class. The getNetworkInfo method of the ConnectivityManager class returns a NetworkInfo object that represents the status of the internet connection. The isConnected method of the NetworkInfo object returns a boolean value indicating whether the device is connected to the internet.

The example checks whether the device is connected to the internet using WiFi or mobile data by calling the isConnected method for both TYPE_WIFI and TYPE_MOBILE. If either of these connections is active, the device is considered to be connected to the internet.

You can use this approach to check the internet connection in an Android app using the ConnectivityManager class. You can also customize this approach by using different constants, such as TYPE_BLUETOOTH or TYPE_ETHERNET, to check for different types of internet connections.

You can also use other approaches, such as using the getActiveNetworkInfo method of the ConnectivityManager class, or using the isOnline method of the NetworkUtils class of the Android Jetpack library, to check the internet connection in an Android app.