我有一个BLE设备。设备有一个按钮。目标是在按下设备按钮时触发Android设备中的某些操作。
我的问题是，我能够通过系统蓝牙扫描仪发现并与我的BLE设备配对。但是当我使用BLE扫描内部代码（与谷歌代码相同）时，我无法看到设备。
我的清单中有以下标记。
uses-permission android:name="android.permission.BLUETOOTH"
uses-permission android:name="android.permission.BLUETOOTH_ADMIN"
这是我的gradle设置
minSdkVersion 18, targetSdkVersion 22
Phone- Nexus 5 | Android M
这是日志。正如您在粗体文本中看到的那样，它会发现设备，但不会添加它。 知道为什么会这样吗？
BtGatt.GattService﹕ registerClient() - UUID=b7516aaa-22b1-4d8f-a71e-405e5584edcf BtGatt.GattService﹕ onClientRegistered() - UUID=b7516aaa-22b1-4d8f-a71e-405e5584edcf, clientIf=5
BtGatt.GattService﹕ start scan with filters
BtGatt.ScanManager﹕ handling starting scan
BtGatt.ScanManager﹕ configureRegularScanParams() - queue=1
BtGatt.ScanManager﹕ configureRegularScanParams() - ScanSetting Scan mode=2 mLastConfiguredScanSetting=-2147483648
BtGatt.ScanManager﹕ configureRegularScanParams - scanInterval = 8000configureRegularScanParams - scanWindow = 8000
BtGatt.GattService﹕ onScanParamSetupCompleted : 0
bt_btif_gattc﹕ btif_gattc_update_properties BLE device name=Security Tag len=12 dev_type=2 bt_btif_gattc﹕ btif_gattc_update_properties BLE device name=BlueFind len=15 dev_type=2
BtGatt.GattService﹕ stopScan() - queue size =1
BtGatt.ScanManager﹕ stop scan
BtGatt.ScanManager﹕ configureRegularScanParams() - queue=0
BtGatt.ScanManager﹕ configureRegularScanParams() - ScanSetting Scan mode=-2147483648 mLastConfiguredScanSetting=2
BtGatt.ScanManager﹕ configureRegularScanParams() - queue emtpy, scan stopped
BtGatt.GattService﹕ unregisterClient() - clientIf=5
BtGatt.GattService﹕ registerClient() -
**UUID=2f2450e9-ea7a-4dfe-aef2-27bcd75c83c5**
BtGatt.GattService﹕ onClientRegistered() - UUID=2f2450e9-ea7a-4dfe-aef2-27bcd75c83c5, clientIf=5
BtGatt.GattService﹕ start scan with filters
BtGatt.ScanManager﹕ handling starting scan BtGatt.ScanManager﹕ configureRegularScanParams() - queue=1
BtGatt.ScanManager﹕ configureRegularScanParams() - ScanSetting Scan mode=2 mLastConfiguredScanSetting=-2147483648
BtGatt.ScanManager﹕ configureRegularScanParams - scanInterval = 8000configureRegularScanParams - scanWindow = 8000
BtGatt.GattService﹕ onScanParamSetupCompleted : 0
**bt_btif_gattc﹕ btif_gattc_update_properties BLE device name=Security Tag len=12 dev_type=2**
**bt_btif_gattc﹕ btif_gattc_update_properties BLE device name=BlueFind len=15 dev_type=2**
BtGatt.GattService﹕ stopScan() - queue size =1
BtGatt.ScanManager﹕ stop scan
BtGatt.ScanManager﹕ configureRegularScanParams() - queue=0
BtGatt.ScanManager﹕ configureRegularScanParams() - ScanSetting Scan mode=-2147483648 mLastConfiguredScanSetting=2
BtGatt.ScanManager﹕ configureRegularScanParams() - queue emtpy, scan stopped
BtGatt.GattService﹕ unregisterClient() - clientIf=5
- EDIT1 -
这是我的代码段
private void scanLeDevice(final boolean enable) {
if (enable) {
// Stops scanning after a pre-defined scan period.
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
mScanning = false;
mBluetoothAdapter.stopLeScan(mLeScanCallback);
invalidateOptionsMenu();
}
}, SCAN_PERIOD);
mScanning = true;
mBluetoothAdapter.startLeScan(mLeScanCallback);
} else {
mScanning = false;
mBluetoothAdapter.stopLeScan(mLeScanCallback);
}
invalidateOptionsMenu();
}
// Adapter for holding devices found through scanning.
private class LeDeviceListAdapter extends BaseAdapter {
private ArrayList<BluetoothDevice> mLeDevices;
private LayoutInflater mInflator;
public LeDeviceListAdapter() {
super();
mLeDevices = new ArrayList<BluetoothDevice>();
mInflator = BLEScanActivity.this.getLayoutInflater();
}
public void addDevice(BluetoothDevice device) {
if(!mLeDevices.contains(device)) {
mLeDevices.add(device);
}
}
public BluetoothDevice getDevice(int position) {
return mLeDevices.get(position);
}
public void clear() {
mLeDevices.clear();
}
@Override
public int getCount() {
return mLeDevices.size();
}
@Override
public Object getItem(int i) {
return mLeDevices.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
ViewHolder viewHolder;
// General ListView optimization code.
if (view == null) {
view = mInflator.inflate(R.layout.listitem_device, null);
viewHolder = new ViewHolder();
viewHolder.deviceAddress = (TextView) view.findViewById(R.id.device_address);
viewHolder.deviceName = (TextView) view.findViewById(R.id.device_name);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
final BluetoothDevice device = mLeDevices.get(i);
final String deviceName = device.getName();
if (deviceName != null && deviceName.length() > 0)
viewHolder.deviceName.setText(deviceName);
else
viewHolder.deviceName.setText(R.string.unknown_device);
viewHolder.deviceAddress.setText(device.getAddress());
return view;
}
}
// Device scan callback.
private BluetoothAdapter.LeScanCallback mLeScanCallback =
new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
runOnUiThread(new Runnable() {
@Override
public void run() {
mLeDeviceListAdapter.addDevice(device);
mLeDeviceListAdapter.notifyDataSetChanged();
}
});
}
};
答案 0 :(得分：3)
您是使用BluetoothAdapter显示设备还是在服务中使用BluetoothGattCallback？
粗体的UUID是否与您设备的服务UUID相对应？
答案 1 :(得分：0)
您是否有位置设置？ Android 6.0+需要位置设置。您应该添加清单：
<uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
完成此操作后，您必须进入手机设置并手动启用位置权限。这是通过设置＆gt;隐私和安全＆gt;应用权限
完成的不要问我为什么蓝牙需要位置权限。这对我来说也没有意义。实际上，即使关闭位置功能，它仍然需要位置设置。