无法发现BLE设备
无法发现BLE设备
提问于 2015-11-02 13:57:41
我有个BLE装置。设备只有一个按钮。目标是在android设备中按下设备按钮时触发某些动作。
我的问题是，我能够发现和配对我的BLE设备通过系统蓝牙扫描仪。但当我使用BLE扫描内部代码(与谷歌代码相同)时，我无法看到设备。
我在我的舱单上有以下标签.
uses-permission android:name="android.permission.BLUETOOTH"
uses-permission android:name="android.permission.BLUETOOTH_ADMIN"这是我的等级设置
minSdkVersion 18, targetSdkVersion 22
Phone- Nexus 5 | Android M这是原木。正如您在粗体文本中所看到的，它发现了设备，但没有添加它。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 1--
这是我的代码片段
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();
}
});
}
};回答 2
Stack Overflow用户
发布于 2015-11-02 14:21:58
您是使用BluetoothAdapter来显示设备，还是在服务中使用BluetoothGattCallback？
UUID是否与设备的服务UUID对应？
Stack Overflow用户
发布于 2016-05-27 16:24:06
你有位置设置吗？Android 6.0+需要位置设置。你应该在你的清单上加上：
<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，必须进入您的电话设置并手动启用位置权限。这是通过Settings>Privacy和Safety>App权限完成的。
不要问我为什么蓝牙需要位置权限。对我来说也没什么意义。事实上，即使位置函数被关闭，它仍然需要位置设置。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/33479314
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