在Android的后台服务中获取蓝牙可扩展状态
我在Bluetooth Gatt回调中有以下方法,可响应任何Bluetooth连接更改:在Android的后台服务中获取蓝牙可扩展状态,android,bluetooth,xamarin.android,bluetooth-lowenergy,Android,Bluetooth,Xamarin.android,Bluetooth Lowenergy,我在Bluetooth Gatt回调中有以下方法,可响应任何Bluetooth连接更改: public override void OnConnectionStateChange(BluetoothGatt gatt, [GeneratedEnum] GattStatus status, [GeneratedEnum] ProfileState newState) { base.OnConnectionStateChange(gatt, status, newState); i
public override void OnConnectionStateChange(BluetoothGatt gatt, [GeneratedEnum] GattStatus status, [GeneratedEnum] ProfileState newState)
{
base.OnConnectionStateChange(gatt, status, newState);
if(newState == ProfileState.Connected)
{
gatt.DiscoverServices();
}
else if(newState == ProfileState.Disconnected)
{
gatt.Close();
Log.Info("BLE", "Status: Disconnected");
}
}
在我的后台服务中,我想在连接或断开可移动设备时,监听断开连接的任何连接
我的服务:
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
try
{
Toast.MakeText(this, "Background service started", ToastLength.Long);
// I want to listen for any connectivity changes here
base.OnStartCommand(intent, flags, startId);
return StartCommandResult.Sticky;
}
有谁能帮助我实现这一点吗?首先,可以创建一个
广播接收器来监听蓝牙的状态,如下所示:
public class BluetoothStateBroadcastReceive : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Received intent!", ToastLength.Short).Show();
string action = intent.Action;
BluetoothDevice device = (BluetoothDevice)intent.GetParcelableExtra(BluetoothDevice.ExtraDevice);
switch (action)
{
case BluetoothDevice.ActionAclConnected:
Toast.MakeText(context, "BluetoothDevice:" + device.Name + "Connected", ToastLength.Long).Show();
break;
case BluetoothDevice.ActionAclDisconnected:
Toast.MakeText(context, "BluetoothDevice:" + device.Name + "Disconnected", ToastLength.Short).Show();
break;
case BluetoothAdapter.ActionStateChanged:
Toast.MakeText(context, "BluetoothDevice:" + device.Name + "Changed", ToastLength.Short).Show();
//int blueState = intent.GetIntExtra(BluetoothAdapter.ExtraState, 0);
//switch (blueState)
//{
// case BluetoothAdapter.STATE_OFF:
// Toast.MakeText(context, "off", ToastLength.Short).Show();
// break;
// case BluetoothAdapter.STATE_ON:
// Toast.MakeText(context, "on", ToastLength.Short).Show();
// break;
//}
break;
}
}
}
在服务中
,您可以注册它:
public class BluetoothService : Service
{
private BluetoothStateBroadcastReceive mReceive;
public BluetoothService()
{
}
public BluetoothService(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
{
}
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
registerBluetoothReceiver();
return base.OnStartCommand(intent, flags, startId);
}
public override IBinder OnBind(Intent intent)
{
throw new NotImplementedException();
}
private void registerBluetoothReceiver()
{
if (mReceive == null)
{
mReceive = new BluetoothStateBroadcastReceive();
}
IntentFilter intentFilter = new IntentFilter();
intentFilter.AddAction(BluetoothAdapter.ActionStateChanged);
intentFilter.AddAction(BluetoothDevice.ActionAclConnected);
intentFilter.AddAction(BluetoothDevice.ActionAclDisconnected);
//intentFilter.AddAction("android.bluetooth.BluetoothAdapter.STATE_OFF");
//intentFilter.AddAction("android.bluetooth.BluetoothAdapter.STATE_ON");
RegisterReceiver(mReceive, intentFilter);
}
public override void OnDestroy()
{
unregisterBluetoothReceiver();
base.OnDestroy();
}
private void unregisterBluetoothReceiver()
{
if (mReceive != null)
{
UnregisterReceiver(mReceive);
mReceive = null;
}
}
}
然后,您可以在需要的地方尝试此功能。使用服务时,您可以参考此功能。首先,可以创建一个广播接收器来监听蓝牙的状态,如下所示:
public class BluetoothStateBroadcastReceive : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Received intent!", ToastLength.Short).Show();
string action = intent.Action;
BluetoothDevice device = (BluetoothDevice)intent.GetParcelableExtra(BluetoothDevice.ExtraDevice);
switch (action)
{
case BluetoothDevice.ActionAclConnected:
Toast.MakeText(context, "BluetoothDevice:" + device.Name + "Connected", ToastLength.Long).Show();
break;
case BluetoothDevice.ActionAclDisconnected:
Toast.MakeText(context, "BluetoothDevice:" + device.Name + "Disconnected", ToastLength.Short).Show();
break;
case BluetoothAdapter.ActionStateChanged:
Toast.MakeText(context, "BluetoothDevice:" + device.Name + "Changed", ToastLength.Short).Show();
//int blueState = intent.GetIntExtra(BluetoothAdapter.ExtraState, 0);
//switch (blueState)
//{
// case BluetoothAdapter.STATE_OFF:
// Toast.MakeText(context, "off", ToastLength.Short).Show();
// break;
// case BluetoothAdapter.STATE_ON:
// Toast.MakeText(context, "on", ToastLength.Short).Show();
// break;
//}
break;
}
}
}
在服务中
,您可以注册它:
public class BluetoothService : Service
{
private BluetoothStateBroadcastReceive mReceive;
public BluetoothService()
{
}
public BluetoothService(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
{
}
[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
{
registerBluetoothReceiver();
return base.OnStartCommand(intent, flags, startId);
}
public override IBinder OnBind(Intent intent)
{
throw new NotImplementedException();
}
private void registerBluetoothReceiver()
{
if (mReceive == null)
{
mReceive = new BluetoothStateBroadcastReceive();
}
IntentFilter intentFilter = new IntentFilter();
intentFilter.AddAction(BluetoothAdapter.ActionStateChanged);
intentFilter.AddAction(BluetoothDevice.ActionAclConnected);
intentFilter.AddAction(BluetoothDevice.ActionAclDisconnected);
//intentFilter.AddAction("android.bluetooth.BluetoothAdapter.STATE_OFF");
//intentFilter.AddAction("android.bluetooth.BluetoothAdapter.STATE_ON");
RegisterReceiver(mReceive, intentFilter);
}
public override void OnDestroy()
{
unregisterBluetoothReceiver();
base.OnDestroy();
}
private void unregisterBluetoothReceiver()
{
if (mReceive != null)
{
UnregisterReceiver(mReceive);
mReceive = null;
}
}
}
然后你可以在你想要的地方尝试。当使用服务时,你可以参考这个。你可以注册一个广播接收器
来监听状态。我已经读过这方面的内容。。但从过去的两天起,我就被这件事缠住了。请帮助我,这必须需要后台服务才能侦听状态,或者是否可以侦听活动中的状态。我必须在后台服务中侦听BLE
设备的连接更改。您可以注册BroadcastReceiver
来侦听状态。我已经阅读了相关内容。。但从过去的两天起,我就被这件事缠住了。请帮忙好的,那一定需要后台服务来监听状态,或者是否可以监听活动中的状态。我必须在后台服务中监听BLE
设备的连接更改。干得好。非常感谢你。非常感谢你的出色工作。非常感谢你。非常感谢