How to change the activity if there is no internet connection in android studio (java)

 Do you want to check the internet connection on your android application?

This is how you do it...

• STEP1

Add these permissions in the manifest file

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

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

• STEP2

Copy paste these methods in the relevant java class file 

private boolean isNetworkAvailable() {
    ConnectivityManager connectivityManager
            = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
private void noNetwork(){
    boolean check=isNetworkAvailable();
    if (check==false){
        changeactivityno();
    }
    return;
}

public void changeactivityno(){
        Intent intent=new Intent (this, nonetwork.class);
        startActivity(intent);
    }

• STEP3

Call the function noNetwork() where you need to check the internet connection. 

example; I'm checking the internet connection when im initializing the activity

• STEP4

Create a new activity called nonetwork and design it as you prefer to handle the no internet connection error 

example: 

note: you can add pictures, text, etc..