Question

我正在创建一个扫描外围设备的应用程序。这是我开始扫描的代码：

private void startScan(){
    bleScanner = bleAdapter.getBluetoothLeScanner();
    List<ScanFilter> filters = new ArrayList<ScanFilter>();
    filters.add(new ScanFilter.Builder().build());
    ScanSettings settings = new ScanSettings.Builder()
            .setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)
            .setReportDelay(1000)
            .build();
    bleScanner.startScan(filters,settings,scanCallback);
    Log.i(TAG,"Scan started");
}

这是扫描回叫：

private ScanCallback scanCallback = new ScanCallback() {
    @Override
    public void onScanResult(int callbackType, ScanResult result) {
        Log.i("scan found something");
    }

    @Override
    public void onBatchScanResults(List<ScanResult> results) {
        if(!results.isEmpty()){
            BluetoothDevice advert = results.get(0).getDevice();
            Log.i("found device: "+advert.getAddress());
            stopScan();
            startClient(advert);
        }else{
            Log.i("scanning...");
        }
    }

    @Override
    public void onScanFailed(int errorCode) {
        Log.i("Scan failed to start");
    }
};

我有两个Android设备，我正在测试这个应用程序，一个在API 21上运行，另一个在23上运行。当我在带有API 22的设备上测试此应用程序时，回调功能正常，但在设备上测试时API 23我确实得到了“扫描启动”日志，但scanCallBack无效。我添加了所有必需的权限：

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

任何帮助将不胜感激，谢谢！

BluetoothScanCallback无法在API级别大于21的设备上运行

0 个答案: