Question

我正在为API 18或更高版本创建一个利用BLE的应用程序。我已经实现了BluetoothAdapter.LeScanCallBack方法但是; bluetootAdppter.StartLeScan（this）'没有调用@override onLeScan（..，..，..）方法。我搜索了整个谷歌，但没有解决方案已经解决了我的问题。请帮助我我在SamsungGrand 2和Samsung NOTE3上测试了这个..谢谢

public class DeviceScanActivity extends Activity implements BluetoothAdapter.LeScanCallback 
{
    private BluetoothAdapter mBluetoothAdapter;
    private boolean mScanning;
    private Handler mHandler;

    private static final long SCAN_PERIOD = 10000;
    // private LeDeviceListAdapter mLeDeviceListAdapter;
    private ArrayList<BluetoothDevice> alBlDevices;
    private ArrayList<String> alDevicesNames;
    BluetoothDevice tmpDevice;
    LinearLayout lllist;

    private BluetoothManager bluetoothManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_device_scan);
        initData();
        initUI();
    }

    private void initData() {
        bluetoothManager = (BluetoothManager) getSystemService(getApplicationContext().BLUETOOTH_SERVICE);
        mBluetoothAdapter = bluetoothManager.getAdapter();

        mHandler = new Handler();
        alBlDevices = new ArrayList<BluetoothDevice>();

    }

    private void initUI() {
        lllist = (LinearLayout) findViewById(R.id.llList);
        Toast.makeText(getApplicationContext(), "initUI()", Toast.LENGTH_LONG)
                .show();
        scanLeDevice(true);

    }

    private void scanLeDevice(final boolean enable) {
        if (enable) {
            Toast.makeText(getApplicationContext(), "START SCANNING",
                    Toast.LENGTH_LONG).show();
            // Stops scanning after a pre-defined scan period.

            /*
             * mHandler.postDelayed(new Runnable() {
             * 
             * @Override public void run() { mScanning = false;
             * mBluetoothAdapter.stopLeScan(mLeScanCallback);
             * 
             * } }, SCAN_PERIOD);
             */

            mScanning = true;

            mBluetoothAdapter.startLeScan(this);
        } else {
            mScanning = false;
            mBluetoothAdapter.stopLeScan(this);
        }

    }



    @Override
    public void onLeScan(BluetoothDevice device, int rssi, byte[] f) 
    {

        Toast.makeText(getApplicationContext(), "HHHHH>", Toast.LENGTH_LONG)
                .show();
        tmpDevice = device;

        alBlDevices.add(tmpDevice);
        alDevicesNames.add(tmpDevice.getName());
        Toast.makeText(getApplicationContext(),
                "scanning>" + tmpDevice.getName(), Toast.LENGTH_LONG).show();

        runOnUiThread(new Runnable() 
        {
            @Override
            public void run() {

                LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
                View tvView = inflater.inflate(R.layout.tv_single_device, null);
                ((TextView) tvView.findViewById(R.id.textView1))
                        .setText(alDevicesNames.get(alDevicesNames.size() - 1));
                lllist.addView(tvView);
                Log.v("Tag", tmpDevice.getName());
            }
        });
    }

}

...

logcat的：

    05-08 10:46:06.373: E/ViewSystem(7019): ViewRootImpl #2 Surface is not valid.
05-08 10:46:06.443: D/dalvikvm(7019): GC_FOR_ALLOC freed 707K, 34% free 9276K/13920K, paused 15ms, total 15ms
05-08 10:46:06.468: D/BluetoothAdapter(7019): startLeScan(): null
05-08 10:46:06.483: D/BluetoothAdapter(7019): onClientRegistered() - status=0 clientIf=4
05-08 10:46:06.528: D/libEGL(7019): loaded /vendor/lib/egl/libGLES_mali.so
05-08 10:46:06.533: I/(7019): PLATFORM VERSION : JB-MR-2
05-08 10:46:06.548: D/mali_winsys(7019): new_window_surface returns 0x3000
05-08 10:46:06.563: D/OpenGLRenderer(7019): Enabling debug mode 0

Answer 1

你需要为你的onLEScan实现回调，哪个功能返回你需要做mBluetoothAdapter.startLEScan（MyBLECallback）之类的BLE设备并实现该BLE回调的行为，它就像实现了单独的线程，问候

注意：传递参数＆＃34;这个＆＃34;永远不会工作

Android：未调用蓝牙LE onLeScan（）

1 个答案: