/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mDbAdapter = new HostDbAdapter(this);
mDbAdapter.open();
updateList();
registerForContextMenu(getListView());
}
/**
* Construct a magic packet using the IP, port, and MAC stored in the database, and send the
* packet to wake the host.
*
* @param rowID the key value to retrieve the row from the database
*/
private void wakeHost(long rowID) {
// Retrieve the host info
Cursor hostCursor = mDbAdapter.fetchHost(rowID);
startManagingCursor(hostCursor);
String ipStr = hostCursor.getString(hostCursor.getColumnIndexOrThrow(HostDbAdapter.KEY_IP));
String macStr = hostCursor.getString(hostCursor.getColumnIndexOrThrow(HostDbAdapter.KEY_MAC));
int port =
Integer.parseInt(
hostCursor.getString(hostCursor.getColumnIndexOrThrow(HostDbAdapter.KEY_PORT)));
// Convert to two's complement byte array's
// Convert the MAC address into a byte array
byte[] mac = toByteArray(macStr, ":", 16);
// convert the IP address into a byte array
byte[] ip = toByteArray(ipStr, "[.]", 10);
// Construct the magic packet
byte[] magicPacket = new byte[102];
magicPacket[0] = -1;
magicPacket[1] = -1;
magicPacket[2] = -1;
magicPacket[3] = -1;
magicPacket[4] = -1;
magicPacket[5] = -1;
System.arraycopy(mac, 0, magicPacket, 6, 6);
System.arraycopy(mac, 0, magicPacket, 12, 6);
System.arraycopy(mac, 0, magicPacket, 18, 6);
System.arraycopy(mac, 0, magicPacket, 24, 6);
System.arraycopy(mac, 0, magicPacket, 30, 6);
System.arraycopy(mac, 0, magicPacket, 36, 6);
System.arraycopy(mac, 0, magicPacket, 42, 6);
System.arraycopy(mac, 0, magicPacket, 48, 6);
System.arraycopy(mac, 0, magicPacket, 54, 6);
System.arraycopy(mac, 0, magicPacket, 60, 6);
System.arraycopy(mac, 0, magicPacket, 66, 6);
System.arraycopy(mac, 0, magicPacket, 72, 6);
System.arraycopy(mac, 0, magicPacket, 78, 6);
System.arraycopy(mac, 0, magicPacket, 84, 6);
System.arraycopy(mac, 0, magicPacket, 90, 6);
System.arraycopy(mac, 0, magicPacket, 96, 6);
// Send the packet
try {
InetAddress network = InetAddress.getByAddress(ip);
DatagramPacket packet = new DatagramPacket(magicPacket, magicPacket.length, network, port);
DatagramSocket socket = new DatagramSocket();
socket.send(packet);
} catch (Exception e) {
System.err.println(e);
}
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
switch (item.getItemId()) {
case R.id.context_menu_wake:
wakeHost(info.id);
return true;
case R.id.context_menu_edit:
Intent i = new Intent(this, HostEdit.class);
i.putExtra(HostDbAdapter.KEY_ROWID, info.id);
startActivityForResult(i, ACTIVITY_EDIT);
return true;
case R.id.context_menu_delete:
mDbAdapter.deleteHost(info.id);
updateList();
return true;
}
return super.onContextItemSelected(item);
}
/**
* Set the the activity as a ListAdapter using all four user editable fields from the database.
*/
private void updateList() {
// Get all of the rows from the database and create the item list
Cursor hostsCursor = mDbAdapter.fetchAllHosts();
startManagingCursor(hostsCursor);
// Create an array to specify the fields we want to display in the list (only hostname)
String[] from =
new String[] {
HostDbAdapter.KEY_HOSTNAME,
HostDbAdapter.KEY_MAC,
HostDbAdapter.KEY_IP,
HostDbAdapter.KEY_PORT
};
// and an array of the fields we want to bind those fields to
int[] to =
new int[] {R.id.host_row_name, R.id.host_row_mac, R.id.host_row_ip, R.id.host_row_port};
// Now create a simple cursor adapter and set it to display
SimpleCursorAdapter hosts =
new SimpleCursorAdapter(this, R.layout.host_row, hostsCursor, from, to);
setListAdapter(hosts);
}