EditText für IP-Adressen?

    public void init() {

        button_Transfer = (Button)findViewById(R.id.button_Transfer);
        button_Transfer.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
                final NetworkInfo networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
                if (networkInfo != null && networkInfo.isConnected()) {
                    String ip_adresse = editText_synch.getText().toString();

                    if (ip-adresse ok???) {
                        // do something...
      
                    }else{
                    // do something else....
                    }
                }else{
                    Toast.makeText(daten_transfer.this,"KEIN WLAN VORHANDEN!",Toast.LENGTH_LONG).show();
                }
            }
        });
    }