我是android开发的新手,目前正在尝试修改https://developer.android.com/samples/BluetoothLeGatt/index.html上的Bluetooth LE接口的示例代码。
该演示项目分为两个活动,但我想将其简化为一个活动。将DeviceControlActivity更改为“常规” Java类。经过几次尝试,我使BluetoothLeService与我的Device Control类的构造函数一起运行:
public DeviceControl (BluetoothDevice device, Context context) {
mDeviceName = device.getName();
mDeviceAddress = device.getAddress();
this.context = context;
Log.d(TAG, "DeviceControl construktor");
Log.d(TAG, "Context = " + context);
Intent gattServiceIntent = new Intent(context, BluetoothLeService.class);
context.bindService(gattServiceIntent, mServiceConnection, context.BIND_AUTO_CREATE);
}
BluetoothLeService类已与Log.d()一起使用,并且似乎可以正常工作。但是,它在此处发出的广播是:
private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
String intentAction;
if (newState == BluetoothProfile.STATE_CONNECTED) {
intentAction = ACTION_GATT_CONNECTED;
mConnectionState = STATE_CONNECTED;
broadcastUpdate(intentAction);
Log.i(TAG, "Connected to GATT server.");
// Attempts to discover services after successful connection.
Log.i(TAG, "Attempting to start service discovery:" +
mBluetoothGatt.discoverServices());
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
intentAction = ACTION_GATT_DISCONNECTED;
mConnectionState = STATE_DISCONNECTED;
Log.i(TAG, "Disconnected from GATT server.");
broadcastUpdate(intentAction);
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w(TAG, "onServicesDiscovered received: " + status);
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
};
private void broadcastUpdate(final String action) {
Log.d(TAG, "Methode broadcastUpdate aufgerufen. Action = " + action);
final Intent intent = new Intent(action);
sendBroadcast(intent);
}
但是,它们从未到达我最初将服务绑定到的DeviceControl类:
private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.d(TAG, "Broadcast received");
final String action = intent.getAction();
if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) {
} else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) {
} else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) {
// Show all the supported services and characteristics on the user interface.
System.out.println("GATT-services discovered");
displayGattServices(mBluetoothLeService.getSupportedGattServices());
} else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
displayData(intent.getStringExtra(BluetoothLeService.EXTRA_DATA));
}
}
};
怎么了
我还不能发表评论,但已注册吗?
您必须使用registerReceiver方法注册广播接收器。
PS:如果您使用的是AppCompat库,并且不需要广播就可以离开您的应用程序,请同时查看LocalBroadcastManager。
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我来说两句