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The source code is released under:
GNU Lesser General Public License
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/* Copyright (C) 2011, Kenneth Skovhede * http://www.hexad.dk, opensource@hexad.dk * /* www . j a va 2s . com*/ * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ package mobi.omegacentauri.p1keyboard; import java.util.ArrayList; import mobi.omegacentauri.p1keyboard.R; import android.app.Activity; import android.app.AlertDialog; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.AdapterView.OnItemClickListener; public class DeviceScanActivity extends Activity { private static final int DO_SCAN_AFTER_ENABLE = 1; public static final String EXTRA_DEVICE = "device"; public static final String EXTRA_CONTROLLER = "controller"; private TextView m_knownDeviceLabel; private ListView m_knownDeviceList; private ListView m_foundDeviceList; private LinearLayout m_scanWaitMarker; private TextView m_scanWaitText; private Button m_scanButton; private BluetoothAdapter m_bluetoothAdapter; private ArrayList<BluetoothDevice> m_foundDevices; private int m_controller = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.devicelist); setResult(Activity.RESULT_CANCELED); m_controller = this.getIntent().getIntExtra(EXTRA_CONTROLLER, 0); m_knownDeviceLabel = (TextView)findViewById(R.id.PairedDeviceLabel); m_knownDeviceList = (ListView)findViewById(R.id.PairedDeviceList); m_foundDeviceList = (ListView)findViewById(R.id.FoundDeviceList); m_scanWaitMarker = (LinearLayout)findViewById(R.id.WaitLayoutGroup); m_scanWaitText = (TextView)findViewById(R.id.WaitLabelText); m_scanButton = (Button)findViewById(R.id.ScanButton); registerReceiver(discoveryStartedMonitor, new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED)); registerReceiver(discoveryFinishedMonitor, new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)); registerReceiver(deviceFoundMonitor, new IntentFilter(BluetoothDevice.ACTION_FOUND)); registerReceiver(deviceBondedMonitor, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED)); m_bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (m_bluetoothAdapter == null) { AlertDialog dlg = new AlertDialog.Builder(this).create(); dlg.setMessage("No bluetooth device found"); dlg.show(); return; } ArrayList<BluetoothDevice> devices = new ArrayList<BluetoothDevice>(m_bluetoothAdapter.getBondedDevices()); m_knownDeviceList.setAdapter(new DeviceItemAdapter(this, R.layout.devicelist_item, devices)); if (devices.size() == 0) { m_knownDeviceLabel.setVisibility(View.GONE); m_knownDeviceList.setVisibility(View.GONE); } m_foundDevices = new ArrayList<BluetoothDevice>(); m_foundDeviceList.setAdapter(new DeviceItemAdapter(this, R.layout.devicelist_item, m_foundDevices)); m_knownDeviceList.setOnItemClickListener(onDeviceClick); m_foundDeviceList.setOnItemClickListener(onDeviceClick); m_scanButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { discoverDevices(); } }); discoverDevices(); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == DO_SCAN_AFTER_ENABLE && resultCode == Activity.RESULT_OK) { discoverDevices(); } } private void discoverDevices() { if (!m_bluetoothAdapter.isEnabled()) { startActivityForResult(new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE), DO_SCAN_AFTER_ENABLE); return; } if (m_bluetoothAdapter.isDiscovering()) { m_bluetoothAdapter.cancelDiscovery(); } // Request discover from BluetoothAdapter m_bluetoothAdapter.startDiscovery(); } @Override protected void onDestroy() { super.onDestroy(); if (isFinishing() && m_bluetoothAdapter != null && m_bluetoothAdapter.isDiscovering()) m_bluetoothAdapter.cancelDiscovery(); unregisterReceiver(discoveryStartedMonitor); unregisterReceiver(discoveryFinishedMonitor); unregisterReceiver(deviceFoundMonitor); unregisterReceiver(deviceBondedMonitor); } private void deviceSelected(BluetoothDevice device) { Intent intent = new Intent(); intent.putExtra(EXTRA_DEVICE, device); intent.putExtra(EXTRA_CONTROLLER, m_controller); setResult(Activity.RESULT_OK, intent); finish(); } private OnItemClickListener onDeviceClick = new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) { BluetoothDevice device = (BluetoothDevice)v.getTag(); if (device != null) { m_bluetoothAdapter.cancelDiscovery(); deviceSelected(device); } } }; private class DeviceItemAdapter extends ArrayAdapter<BluetoothDevice> { private ArrayList<BluetoothDevice> m_items; public DeviceItemAdapter(Context context, int textViewResourceId, ArrayList<BluetoothDevice> items) { super(context, textViewResourceId, items); m_items = items; } @Override public View getView(int position, View convertView, ViewGroup parent) { View v = convertView; if (v == null) { LayoutInflater vi = (LayoutInflater) super.getContext() .getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = vi.inflate(R.layout.devicelist_item, null); } TextView name = (TextView)v.findViewById(R.id.DeviceName); TextView address = (TextView)v.findViewById(R.id.DeviceAddress); BluetoothDevice item = m_items.get(position); v.setTag(item); if (item == null) { name.setVisibility(View.GONE); address.setVisibility(View.GONE); } else { name.setVisibility(View.VISIBLE); address.setVisibility(View.VISIBLE); name.setText(item.getName()); address.setText(item.getAddress()); } return v; } } private BroadcastReceiver discoveryStartedMonitor = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { m_foundDevices.clear(); m_scanWaitText.setText(R.string.devicelist_scanningfordevices); m_scanWaitMarker.setVisibility(View.VISIBLE); m_scanButton.setVisibility(View.GONE); } }; private BroadcastReceiver discoveryFinishedMonitor = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { m_scanWaitMarker.setVisibility(View.GONE); m_scanButton.setVisibility(View.VISIBLE); } }; private BroadcastReceiver deviceBondedMonitor = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.BOND_NONE); if (state == BluetoothDevice.BOND_BONDED) { deviceSelected((BluetoothDevice)intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE)); } } }; private BroadcastReceiver deviceFoundMonitor = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (BluetoothDevice.ACTION_FOUND.equals(intent.getAction())) { BluetoothDevice found = (BluetoothDevice)intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); //Filter duplicates for(BluetoothDevice d : m_foundDevices) if (d.getAddress().equals(found.getAddress())) return; m_foundDevices.add(found); } } }; }