/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This XPG software is supplied to you by Xtreme Programming Group, Inc.
* ("XPG") in consideration of your agreement to the following terms, and your
* use, installation, modification or redistribution of this XPG software
* constitutes acceptance of these terms.� If you do not agree with these terms,
* please do not use, install, modify or redistribute this XPG software.
*
* In consideration of your agreement to abide by the following terms, and
* subject to these terms, XPG grants you a non-exclusive license, under XPG's
* copyrights in this original XPG software (the "XPG Software"), to use and
* redistribute the XPG Software, in source and/or binary forms; provided that
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* retain this notice and the following text and disclaimers in all such
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* Except as expressly stated in this notice, no other rights or licenses,
* express or implied, are granted by XPG herein, including but not limited to
* any patent rights that may be infringed by your derivative works or by other
* works in which the XPG Software may be incorporated.
*
* The XPG Software is provided by XPG on an "AS IS" basis.� XPG MAKES NO
* WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, REGARDING THE XPG SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
* COMBINATION WITH YOUR PRODUCTS.
*
* IN NO EVENT SHALL XPG BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION
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*
* ABOUT XPG: Established since June 2005, Xtreme Programming Group, Inc. (XPG)
* is a digital solutions company based in the United States and China. XPG
* integrates cutting-edge hardware designs, mobile applications, and cloud
* computing technologies to bring innovative products to the marketplace. XPG's
* partners and customers include global leading corporations in semiconductor,
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*
* Copyright (C) 2013 Xtreme Programming Group, Inc. All Rights Reserved.
*/
package com.example.bluetooth.le;
import java.util.ArrayList;
import android.app.Activity;
import android.app.ListActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.xtremeprog.sdk.ble.BleService;
import com.xtremeprog.sdk.ble.IBle;
/**
* Activity for scanning and displaying available Bluetooth LE devices.
*/
public class DeviceScanActivity extends ListActivity {
private LeDeviceListAdapter mLeDeviceListAdapter;
private boolean mScanning;
private Handler mHandler;
private IBle mBle;
private static final int REQUEST_ENABLE_BT = 1;
// Stops scanning after 10 seconds.
private static final long SCAN_PERIOD = 10000;
private final BroadcastReceiver mBleReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BleService.BLE_NOT_SUPPORTED.equals(action)) {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(DeviceScanActivity.this,
"Ble not support", Toast.LENGTH_SHORT).show();
finish();
}
});
} else if (BleService.BLE_DEVICE_FOUND.equals(action)) {
// device found
Bundle extras = intent.getExtras();
final BluetoothDevice device = extras
.getParcelable(BleService.EXTRA_DEVICE);
runOnUiThread(new Runnable() {
@Override
public void run() {
mLeDeviceListAdapter.addDevice(device);
mLeDeviceListAdapter.notifyDataSetChanged();
}
});
} else if (BleService.BLE_NO_BT_ADAPTER.equals(action)) {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(DeviceScanActivity.this,
"No bluetooth adapter", Toast.LENGTH_SHORT)
.show();
finish();
}
});
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActionBar().setTitle(R.string.title_devices);
mHandler = new Handler();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
if (!mScanning) {
menu.findItem(R.id.menu_stop).setVisible(false);
menu.findItem(R.id.menu_scan).setVisible(true);
menu.findItem(R.id.menu_refresh).setActionView(null);
} else {
menu.findItem(R.id.menu_stop).setVisible(true);
menu.findItem(R.id.menu_scan).setVisible(false);
menu.findItem(R.id.menu_refresh).setActionView(
R.layout.actionbar_indeterminate_progress);
}
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_scan:
mLeDeviceListAdapter.clear();
scanLeDevice(true);
break;
case R.id.menu_stop:
scanLeDevice(false);
break;
}
return true;
}
@Override
protected void onResume() {
super.onResume();
registerReceiver(mBleReceiver, BleService.getIntentFilter());
// Ensures Bluetooth is enabled on the device. If Bluetooth is not
// currently enabled,
// fire an intent to display a dialog asking the user to grant
// permission to enable it.
if (mBle != null && !mBle.adapterEnabled()) {
Intent enableBtIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
// Initializes list view adapter.
mLeDeviceListAdapter = new LeDeviceListAdapter();
setListAdapter(mLeDeviceListAdapter);
scanLeDevice(true);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// User chose not to enable Bluetooth.
if (requestCode == REQUEST_ENABLE_BT
&& resultCode == Activity.RESULT_CANCELED) {
finish();
return;
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mBleReceiver);
scanLeDevice(false);
mLeDeviceListAdapter.clear();
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
final BluetoothDevice device = mLeDeviceListAdapter.getDevice(position);
if (device == null)
return;
final Intent intent = new Intent(this, DeviceControlActivity.class);
intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_NAME,
device.getName());
intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_ADDRESS,
device.getAddress());
if (mBle != null) {
mBle.stopScan();
}
startActivity(intent);
}
private void scanLeDevice(final boolean enable) {
BleApplication app = (BleApplication) getApplication();
mBle = app.getIBle();
if (mBle == null) {
return;
}
if (enable) {
// Stops scanning after a pre-defined scan period.
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
mScanning = false;
if (mBle != null) {
mBle.stopScan();
}
invalidateOptionsMenu();
}
}, SCAN_PERIOD);
mScanning = true;
if (mBle != null) {
mBle.startScan();
}
} else {
mScanning = false;
if (mBle != null) {
mBle.stopScan();
}
}
invalidateOptionsMenu();
}
// Adapter for holding devices found through scanning.
private class LeDeviceListAdapter extends BaseAdapter {
private ArrayList<BluetoothDevice> mLeDevices;
private LayoutInflater mInflator;
public LeDeviceListAdapter() {
super();
mLeDevices = new ArrayList<BluetoothDevice>();
mInflator = DeviceScanActivity.this.getLayoutInflater();
}
public void addDevice(BluetoothDevice device) {
if (!mLeDevices.contains(device)) {
mLeDevices.add(device);
}
}
public BluetoothDevice getDevice(int position) {
return mLeDevices.get(position);
}
public void clear() {
mLeDevices.clear();
}
@Override
public int getCount() {
return mLeDevices.size();
}
@Override
public Object getItem(int i) {
return mLeDevices.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
ViewHolder viewHolder;
// General ListView optimization code.
if (view == null) {
view = mInflator.inflate(R.layout.listitem_device, null);
viewHolder = new ViewHolder();
viewHolder.deviceAddress = (TextView) view
.findViewById(R.id.device_address);
viewHolder.deviceName = (TextView) view
.findViewById(R.id.device_name);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
BluetoothDevice device = mLeDevices.get(i);
final String deviceName = device.getName();
if (deviceName != null && deviceName.length() > 0)
viewHolder.deviceName.setText(deviceName);
else
viewHolder.deviceName.setText(R.string.unknown_device);
viewHolder.deviceAddress.setText(device.getAddress());
return view;
}
}
static class ViewHolder {
TextView deviceName;
TextView deviceAddress;
}
}
