Android check internet connection

We need to check internet connection before open new activity play video online.

First, add this lines to AndroidManifest.xml.

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

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

Copy to below findViewById.

final ConnectivityManager

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

Last, in the button open next activity, use if command.

NetworkInfo nf=cn.getActiveNetworkInfo();

      if (nf == null){

     Toast.makeText(MainActivity.this,"No internet connection!",

Toast.LENGTH_SHORT).show();                  

     }

      else if (!nf.isConnected()){

     Toast.makeText(MainActivity.this,"No internet connection!", Toast.LENGTH_SHORT).show();

     }

      else if (!nf.isAvailable()){

     Toast.makeText(MainActivity.this,"No internet connection!", Toast.LENGTH_SHORT).show();

     }

      else{

          //start new activity

     }