在我的Android应用程序中，我需要监控配对设备之间的连接，因此一旦连接丢失或其他设备Bluetooth关闭，我想提醒用户。我使用了BluetoothDevice.ACTION_ACL_DISCONNECTED ,BluetoothDevice.ACTION_ACL_CONNECTED，但它没有用！
请问如何发送有关连接状态的通知（仍然是已连接，已断开连接）？任何帮助将不胜感激
这是我的代码
MainActivity
public class MainActivity extends Activity
{
private TextView StatusTv;
private Button ActivateBtn;
private Button PairedBtn;
private Button ScanBtn;
private ProgressDialog ProgressDlg;
private ArrayList<BluetoothDevice> ScannedNearbyDevicesList = new ArrayList<BluetoothDevice>();
private BluetoothAdapter mBluetoothAdapter;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StatusTv = (TextView) findViewById(R.id.tv_status);
ActivateBtn = (Button) findViewById(R.id.btn_enable);
PairedBtn = (Button) findViewById(R.id.btn_view_paired);
ScanBtn = (Button) findViewById(R.id.btn_scan);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null)
{
showUnsupported();
}
else
{
ActivateBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mBluetoothAdapter.isEnabled())
{
mBluetoothAdapter.disable();
showDisabled();
}
else
{
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1000);
}
}
});
ScanBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0)
{
mBluetoothAdapter.startDiscovery();
}
});
ProgressDlg = new ProgressDialog(this);
ProgressDlg.setMessage("Scanning...");
ProgressDlg.setCancelable(false);
ProgressDlg.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
mBluetoothAdapter.cancelDiscovery();
}
});
PairedBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Set<BluetoothDevice> pairedDevicesSet = mBluetoothAdapter.getBondedDevices();
if (pairedDevicesSet == null || pairedDevicesSet.size() == 0)
{
showToast("No Paired Devices Found");
}
else
{
ArrayList<BluetoothDevice> pairedDevicesList = new ArrayList<BluetoothDevice>();
pairedDevicesList.addAll(pairedDevicesSet);
Intent intent = new Intent(MainActivity.this, DevicesListActivity.class);
intent.putParcelableArrayListExtra("device.list", pairedDevicesList);
startActivity(intent);
}
}
});
if (mBluetoothAdapter.isEnabled())
{
showEnabled();
}
else { showDisabled(); }
}
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver, filter);
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver()
{
public void onReceive(Context context, Intent intent)
{
String action = intent.getAction();
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action))
{
final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
if (state == BluetoothAdapter.STATE_ON)
{
showToast("Enabled");
showEnabled();
}
}
else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action))
{
ScannedNearbyDevicesList = new ArrayList<BluetoothDevice>();
ProgressDlg.show();
}
else if (BluetoothDevice.ACTION_FOUND.equals(action))
{
BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
ScannedNearbyDevicesList.add(device);
showToast("Found device " + device.getName());
}
else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action))
{
ProgressDlg.dismiss();
Intent newIntent = new Intent(MainActivity.this, DevicesListActivity.class);
newIntent.putParcelableArrayListExtra("device.list", ScannedNearbyDevicesList);
startActivity(newIntent);
}
}
};
@Override
public void onPause()
{
if (mBluetoothAdapter != null) {
if (mBluetoothAdapter.isDiscovering()) {
mBluetoothAdapter.cancelDiscovery();
}
}
super.onPause();
}
@Override
public void onDestroy()
{
unregisterReceiver(mReceiver);
super.onDestroy();
}
private void showEnabled()
{
StatusTv.setText("Bluetooth is On");
StatusTv.setTextColor(Color.BLUE);
ActivateBtn.setText("Disable");
ActivateBtn.setEnabled(true);
PairedBtn.setEnabled(true);
ScanBtn.setEnabled(true);
}
private void showDisabled()
{
StatusTv.setText("Bluetooth is Off");
StatusTv.setTextColor(Color.RED);
ActivateBtn.setText("Enable");
ActivateBtn.setEnabled(true);
PairedBtn.setEnabled(false);
ScanBtn.setEnabled(false);
}
private void showUnsupported()
{
StatusTv.setText("Bluetooth is unsupported by this device");
ActivateBtn.setText("Enable");
ActivateBtn.setEnabled(false);
PairedBtn.setEnabled(false);
ScanBtn.setEnabled(false);
}
private void showToast(String message)
{
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
}
}
DevicesListActivity
public class DevicesListActivity extends Activity
{
private ListView mListView;
private DeviceListAdapter mAdapter;
private ArrayList<BluetoothDevice> PassedDeviceList;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_devices_list);
PassedDeviceList = getIntent().getExtras().getParcelableArrayList("device.list");
mListView = (ListView) findViewById(R.id.DevicesList_lv);
mAdapter = new DeviceListAdapter(this);
mAdapter.setData(PassedDeviceList);
//When User Click PairBTN For Specific Device
mAdapter.setListener(new DeviceListAdapter.OnPairButtonClickListener() {
@Override
public void onPairButtonClick(int position)
{
showToast("PairedBTN Clicked");
BluetoothDevice device = PassedDeviceList.get(position);
if (device.getBondState() == BluetoothDevice.BOND_BONDED)
{
unpairDevice(device);
}
else
{
showToast("Pairing...");
pairDevice(device);
}
}
});
mListView.setAdapter(mAdapter);
registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED));
registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED));
registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECTED));
registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED));
}
private void pairDevice(final BluetoothDevice device)
{
try
{
Method method = device.getClass().getMethod("createBond", (Class[]) null);
method.invoke(device, (Object[]) null);
registerReceiver(mPairReceiver, new IntentFilter(device.ACTION_ACL_CONNECTED));
registerReceiver(mPairReceiver, new IntentFilter(device.ACTION_ACL_DISCONNECTED));
}
catch (Exception e)
{
e.printStackTrace();
}
}
private void unpairDevice(BluetoothDevice device)
{
try
{
Method method = device.getClass().getMethod("removeBond", (Class[]) null);
method.invoke(device, (Object[]) null);
}
catch (Exception e)
{
e.printStackTrace();
}
}
//To Track Pairing Status with Device
private final BroadcastReceiver mPairReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent)
{
String action = intent.getAction();
if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action))
{
final int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
final int prevState = intent.getIntExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, BluetoothDevice.ERROR);
if(state == BluetoothDevice.BOND_BONDED && prevState == BluetoothDevice.BOND_BONDING)
{
showToast("Paired");
}
else if (state == BluetoothDevice.BOND_NONE && prevState == BluetoothDevice.BOND_BONDED)
{
showToast("Unpaired");
}
if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action))
{
//Do something if connected
showToast( "the Connection is continued ");
}
if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action))
{
//Do something if disconnected
showToast( " Disconnected !!! ");
}
if (BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED.equals(action))
{
//Do something if disconnect Req is done
showToast( " Disconnect Request is Sent");
}
//*********************************************************************
mAdapter.notifyDataSetChanged();
}
}
};
private final BroadcastReceiver monitorConnReceiver= new BroadcastReceiver(){
public void onReceive(Context context, Intent intent)
{
String action = intent.getAction();
final int state = intent.getIntExtra(BluetoothDevice.ACTION_ACL_DISCONNECTED, BluetoothDevice.ERROR);
showToast( " Device State :: "+ state);
//******* To Monitor the Conn. Status with the Paired Device *******
if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action))
{
//Do something if connected
showToast( "the Connection is continued ");
}
else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action))
{
//Do something if disconnected
showToast( " Disconnected !!! ");
}
else if (BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED.equals(action))
{
//Do something if disconnect Req is done
showToast( " Disconnect Request is Sent");
}
}
};
@Override
public void onDestroy() {
unregisterReceiver(mPairReceiver);
super.onDestroy();
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG ).show();
}
}