[英]Android Bluetooth Low Energy readRemoteRssi
我无法弄清楚如何获得'onReadRemoteRssi'回调工作。
我的代码非常简单:
final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
BluetoothAdapter mBluetoothAdapter = bluetoothManager.getAdapter();
BluetoothGatt gatt;
mBluetoothAdapter.startLeScan(new LeScanCallback() {
@Override
public void onLeScan(BluetoothDevice device, int rssi, byte[] record) {
gatt = device.connectGatt(getApplicationContext(), false, new BluetoothGattCallback() {
@Override
public void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) {
super.onReadRemoteRssi(gatt, rssi, status);
Log.d(TAG, "rssi is : " + rssi);
}
});
}
});
gatt.readRemoteRssi(); //returns true
永远不会调用回调。 有谁有想法吗 ?
谢谢 !
将readRemoteRssi()放在BluetoothGattCallback的回调onConnectionStateChange()中。
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;
boolean rssiStatus = mBluetoothGatt.readRemoteRssi();
broadcastUpdate(intentAction);
// Attempts to discover services after successful connection.
Log.i(TAG, "Attempting to start service discovery:" +
mBluetoothGatt.discoverServices());
}
}
};
并且还将onReadRemoteRssi放在BluetoothGattCallback函数中
@Override
public void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status){
if (status == BluetoothGatt.GATT_SUCCESS) {
Log.d(TAG, String.format("BluetoothGatt ReadRssi[%d]", rssi));
}
}
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceAddress);
BluetoothGatt bluetoothGatt = getBluetoothGatt(device);
if (bluetoothGatt == null) {
return false;
}
boolean rdRemoteRssi = bluetoothGatt.readRemoteRssi();
Log.d(FTAG, "BluetoothGatt readRemoteRssi : " + rdRemoteRssi);
return true;
它将调用onReadRemoteRssi回调。在调用此API之前需要连接。
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