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Android app crashing with no internet [closed]
btn1.setOnClickListener(new OnClickListener()
    {
        public void onClick(View v)
        {
            SetPage();
        }
    });

    private void SetPage()
{
    if (isOnline() == true)
        startActivity(new Intent(getApplicationContext(), PageActivity.class));
    else{
        NoInternet();
    }
}

    private void NoInternet()
{
    Toast toast;
    Context context = getApplicationContext();
    toast = Toast.makeText(context, "No internet connection", Toast.LENGTH_SHORT);
    toast.show();
}

private boolean isOnline()
{
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo[] ni = cm.getAllNetworkInfo();
    if (ni != null){
        for (int i = 0; i < ni.length; i++){
            if (ni[i].getState() == NetworkInfo.State.CONNECTED){
                return true;
            }
        }
    }
        return false;
}