68 lines
2.9 KiB
Java
68 lines
2.9 KiB
Java
package nodomain.freeyourgadget.gadgetbridge.service.btle.actions;
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import android.bluetooth.BluetoothGatt;
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import android.bluetooth.BluetoothGattCallback;
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import android.bluetooth.BluetoothGattCharacteristic;
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import android.bluetooth.BluetoothGattDescriptor;
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import android.bluetooth.BluetoothGattService;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import nodomain.freeyourgadget.gadgetbridge.service.btle.BtLEAction;
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import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
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import static nodomain.freeyourgadget.gadgetbridge.service.btle.GattDescriptor.UUID_DESCRIPTOR_GATT_CLIENT_CHARACTERISTIC_CONFIGURATION;
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/**
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* Enables or disables notifications for a given GATT characteristic.
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* The result will be made available asynchronously through the
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* {@link BluetoothGattCallback}.
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*/
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public class NotifyAction extends BtLEAction {
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private static final Logger LOG = LoggerFactory.getLogger(TransactionBuilder.class);
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protected final boolean enableFlag;
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private boolean hasWrittenDescriptor = true;
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public NotifyAction(BluetoothGattCharacteristic characteristic, boolean enable) {
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super(characteristic);
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enableFlag = enable;
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}
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@Override
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public boolean run(BluetoothGatt gatt) {
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boolean result = gatt.setCharacteristicNotification(getCharacteristic(), enableFlag);
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if (result) {
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BluetoothGattDescriptor notifyDescriptor = getCharacteristic().getDescriptor(UUID_DESCRIPTOR_GATT_CLIENT_CHARACTERISTIC_CONFIGURATION);
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if (notifyDescriptor != null) {
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int properties = getCharacteristic().getProperties();
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if ((properties & BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
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LOG.debug("use NOTIFICATION");
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notifyDescriptor.setValue(enableFlag ? BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE : BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
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result = gatt.writeDescriptor(notifyDescriptor);
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} else if ((properties & BluetoothGattCharacteristic.PROPERTY_INDICATE) > 0) {
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LOG.debug("use INDICATION");
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notifyDescriptor.setValue(enableFlag ? BluetoothGattDescriptor.ENABLE_INDICATION_VALUE : BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
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result = gatt.writeDescriptor(notifyDescriptor);
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hasWrittenDescriptor = true;
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} else {
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hasWrittenDescriptor = false;
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}
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} else {
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LOG.warn("sleep descriptor null");
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hasWrittenDescriptor = false;
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}
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} else {
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hasWrittenDescriptor = false;
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LOG.error("Unable to enable notification for " + getCharacteristic().getUuid());
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}
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return result;
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}
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@Override
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public boolean expectsResult() {
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return hasWrittenDescriptor;
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}
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}
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