[英]Android BLE peripheral device data receiving
這可能聽起來很基本,但我是Android BLE開發的初學者。 到目前為止,我能夠將Nexus 9設備創建為外圍設備,將Moto G設置為Central。 另外,我正在成功連接設備。 但我無法弄清楚,當我從中央設備發送一個特性時,它將從外設接收到什么? 廣告回叫僅在廣告成功啟動時才返回(在我的情況下成功)
這是我的外圍代碼
btleGattCallback = new BluetoothGattCallback() {
@Override
// Result of a characteristic read operation
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
@Override
public void onConnectionStateChange(final BluetoothGatt gatt, final int status, final int newState) {
// this will get called when a device connects or disconnects
}
@Override
// New services discovered
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w("doscover", "onServicesDiscovered received: " + status);
}
}
};
BeaconParser bp = new BeaconParser().setBeaconLayout("m:2-3=0,i:4-19,p:20-20");
mBeaconTransmitter = new BeaconTransmitter(this, bp );
// Transmit a beacon with Identifiers 2F234454-CF6D-4A0F-ADF2-F4911BA9FFA6 1 2
Long li = new Long(-0l);
ArrayList<Long> l = new ArrayList<Long>();
l.add(li);
Beacon beacon = new Beacon.Builder()
.setId1("2F234454-CF6D-4A0F-ADF2-F4911BA9FFA6")
.setId2("1")
.setId3("2")
.setManufacturer(0x00ff) // Choose a number of 0x00ff or less as some devices cannot detect beacons with a manufacturer code > 0x00ff
.setTxPower(-59)
.setDataFields(l)
.build();
mBeaconTransmitter.startAdvertising(beacon);
和中央法典相似
btManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE) ;
madapter = btManager.getAdapter();
if (madapter != null && !madapter.isEnabled()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent,1);
}
mHandler = new Handler();
btleGattCallback = new BluetoothGattCallback() {
@Override
// Result of a characteristic read operation
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
@Override
public void onConnectionStateChange(final BluetoothGatt gatt, final int status, final int newState) {
Log.w("doscover", "Connected " + status);
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
Log.w("discover", "onServicesDiscovered received: " + status);
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w("doscover", "onServicesDiscovered received: " + status);
}
}
};
devicefound = new ArrayList<BluetoothDevice>();
devices = new ArrayAdapter<String>( this , R.layout.device_name);
ListView pairedListView = (ListView) findViewById(R.id.textView3);
pairedListView.setAdapter(devices);
mleScanCallback = new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(final BluetoothDevice device, final int rssi, final byte[] scanRecord) {
devicefound.add(device);
//UUID = device.getAddress().toString();
//Log.e("Search", "" + device.getName().toString() );
//Toast`.makeText(context,device.getName().toString(), 1 ).show();
Log.e("Search", "" + device.toString());
Log.e("Search", "" + String.valueOf(rssi) );
devices.add("Nex" + device.getName() );
//mBluetoothGatt = device.connectGatt(getActivity(), true, btleGattCallback);
}
};
pairedListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapter, View arg1,
int position, long id) {
dv = devicefound.get(position);
mBluetoothGatt = dv.connectGatt(getApplicationContext() , true, btleGattCallback);
mBluetoothGatt.connect();
dv.createBond();
//BluetoothDevice dd = madapter.getRemoteDevice(devicefound.get(position).getAddress());
if(i == false)
{
Toast.makeText(getApplicationContext(), "Service found. Connected to " + dv.getName() , 1).show();
}
else
{
Toast.makeText(getApplicationContext(), "Already Connected " + dv.getName() , 1).show();
}
i = mBluetoothGatt.connect();
mBluetoothGatt.beginReliableWrite();
boolean b = mBluetoothGatt.discoverServices();
Log.e("Discovery Started", "" + b );
Log.e("get ItemATPosition", "" + adapter.getItemAtPosition(position));
//BluetoothGattService Service = mBluetoothGatt.getService( );
// = Service.getCharacteristic(k);
BluetoothGattCharacteristic characteristic= new BluetoothGattCharacteristic(k,2,1); //Service
characteristic.setValue( "This is a Charects ");
byte[] value = {(byte)91,(byte)92,(byte)93};
characteristic.setValue(value);
boolean st = mBluetoothGatt.writeCharacteristic(characteristic);
//Toast.makeText(getActivity(), t1.getText() + " " + st, 1).show();
boolean b1 = mBluetoothGatt.executeReliableWrite();
//Toast.makeText(getActivity(), t1.getText() + " " + b1, 1).show();
Intent in = new Intent("ACTION_BOND_STATE_CHANGED.");
sendBroadcast(in);
}
});
scanLeDevice(true);
我正在使用來自中央的連接Gatt的writeCharacteristic命令但是不知道如何從外圍端接收
任何形式的幫助將不勝感激。
外圍模式可能對IOS有好處,我建議您使用淺藍色進行測試,從這里: https : //itunes.apple.com/us/app/lightblue-bluetooth-low-energy/id557428110?mt = 8和as我知道在nexus 6上安裝了Lollipop 5,而nexus 9可以支持外圍模式,nexus 5不支持它。 Moto G支持外設模式?
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