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Code Releases Wiki Activity

Handle BT issues with discovered characteristics

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It occurred to me that onServicesDiscovered() was called multiple times
whenever I connected to my Mi Band 2. Either the band actually sent the
characteristics in multiple chunks or Android itself notified multiple
times.

So we gracefully handle this by
- updating the list of characteristics
- *not* initializing the device again when it *is* already initialized
or at least initializing.
This commit is contained in:
cpfeiffer 2017-03-09 22:46:08 +01:00
parent f070ce5ce7
commit 6282597790
1 changed files with 21 additions and 6 deletions
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21
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/btle/AbstractBTLEDeviceSupport.java
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@ -12,10 +12,13 @@ import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.UUID;
import nodomain.freeyourgadget.gadgetbridge.Logging;
import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
import nodomain.freeyourgadget.gadgetbridge.service.AbstractDeviceSupport;
import nodomain.freeyourgadget.gadgetbridge.service.btle.actions.CheckInitializedAction;
import nodomain.freeyourgadget.gadgetbridge.service.btle.profiles.AbstractBleProfile;
@ -33,12 +36,13 @@ import nodomain.freeyourgadget.gadgetbridge.service.btle.profiles.AbstractBlePro
*/
public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport implements GattCallback {
private BtLEQueue mQueue;
private HashMap<UUID, BluetoothGattCharacteristic> mAvailableCharacteristics;
private Map<UUID, BluetoothGattCharacteristic> mAvailableCharacteristics;
private final Set<UUID> mSupportedServices = new HashSet<>(4);
private Logger logger;
private final List<AbstractBleProfile<?>> mSupportedProfiles = new ArrayList<>();
public static final String BASE_UUID = "0000%s-0000-1000-8000-00805f9b34fb"; //this is common for all BTLE devices. see http://stackoverflow.com/questions/18699251/finding-out-android-bluetooth-le-gatt-profiles
private final Object characteristicsMonitor = new Object();
public AbstractBTLEDeviceSupport(Logger logger) {
this.logger = logger;
@ -166,11 +170,13 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
* @see #addSupportedService(UUID)
*/
public BluetoothGattCharacteristic getCharacteristic(UUID uuid) {
synchronized (characteristicsMonitor) {
if (mAvailableCharacteristics == null) {
return null;
}
return mAvailableCharacteristics.get(uuid);
}
}
private void gattServicesDiscovered(List<BluetoothGattService> discoveredGattServices) {
if (discoveredGattServices == null) {
@ -178,7 +184,7 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
return;
}
Set<UUID> supportedServices = getSupportedServices();
mAvailableCharacteristics = new HashMap<>();
Map<UUID, BluetoothGattCharacteristic> newCharacteristics = new HashMap<>();
for (BluetoothGattService service : discoveredGattServices) {
if (supportedServices.contains(service.getUuid())) {
logger.debug("discovered supported service: " + BleNamesResolver.resolveServiceName(service.getUuid().toString()) + ": " + service.getUuid());
@ -192,7 +198,11 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
intmAvailableCharacteristics.put(characteristic.getUuid(), characteristic);
logger.info(" characteristic: " + BleNamesResolver.resolveCharacteristicName(characteristic.getUuid().toString()) + ": " + characteristic.getUuid());
}
mAvailableCharacteristics.putAll(intmAvailableCharacteristics);
newCharacteristics.putAll(intmAvailableCharacteristics);
synchronized (characteristicsMonitor) {
mAvailableCharacteristics = newCharacteristics;
}
} else {
logger.debug("discovered unsupported service: " + BleNamesResolver.resolveServiceName(service.getUuid().toString()) + ": " + service.getUuid());
}
@ -224,6 +234,11 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
@Override
public void onServicesDiscovered(BluetoothGatt gatt) {
gattServicesDiscovered(gatt.getServices());
if (getDevice().getState().compareTo(GBDevice.State.INITIALIZING) >= 0) {
logger.warn("Services discovered, but device state is already " + getDevice().getState() + " for device: " + getDevice() + ", so ignoring");
return;
}
initializeDevice(createTransactionBuilder("Initializing device")).queue(getQueue());
}