如何将信标名称插入数据库？

Question

我需要提取 BLE 设备名称并在 sqlite 中输入 table。我使用了 google 示例代码并对其进行了修改以实现我的目标。除了将 BLE 设备名称放在 table 中之外，所有部件都可以正常工作。我可以 Toast 设备名称，这意味着该方法有效，但我不知道应该将插入命令放在哪里：将设备名称插入 table.

myDb.insertData("1",device.getName(),date);

这是我的扫描件activity

package com.example.android.bluetoothlegatt;


public class DeviceScanActivity extends ListActivity {

    DatabaseHelper myDb;
    //String beaconName;
    String date = new SimpleDateFormat("ddMMyyHHmmss").format(new Date());


    private LeDeviceListAdapter mLeDeviceListAdapter;
    private BluetoothAdapter mBluetoothAdapter;
    private boolean mScanning;
    private Handler mHandler;

    private static final int REQUEST_ENABLE_BT = 1;

    private static final long SCAN_PERIOD = 50000;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getActionBar().setTitle(R.string.title_devices);
        mHandler = new Handler();
        myDb=new DatabaseHelper(this);

        myDb.insertData("1", getName() , date);

        if    (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
            Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT).show();
            finish();
        }



        final BluetoothManager bluetoothManager =
                (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
        mBluetoothAdapter = bluetoothManager.getAdapter();

        if (mBluetoothAdapter == null) {
            Toast.makeText(this, R.string.error_bluetooth_not_supported,              Toast.LENGTH_SHORT).show();
            finish();
            return;
        }


    }




    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.main, menu);
        if (!mScanning) {
            menu.findItem(R.id.menu_stop).setVisible(false);
            menu.findItem(R.id.menu_scan).setVisible(true);
            menu.findItem(R.id.menu_refresh).setActionView(null);
        } else {
            menu.findItem(R.id.menu_stop).setVisible(true);
            menu.findItem(R.id.menu_scan).setVisible(false);
            menu.findItem(R.id.menu_refresh).setActionView(
                    R.layout.actionbar_indeterminate_progress);
        }
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_scan:
                mLeDeviceListAdapter.clear();
                scanLeDevice(true);
                break;
            case R.id.menu_stop:
                scanLeDevice(false);
                break;
        }
        return true;
    }

    @Override
    protected void onResume() {
        super.onResume();

        currently enabled,
        permission to enable it.
        if (!mBluetoothAdapter.isEnabled()) {
            if (!mBluetoothAdapter.isEnabled()) {
                Intent enableBtIntent = new  Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
            }
        }


        mLeDeviceListAdapter = new LeDeviceListAdapter();
        setListAdapter(mLeDeviceListAdapter);
        scanLeDevice(true);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)     {

        if (requestCode == REQUEST_ENABLE_BT && resultCode == Activity.RESULT_CANCELED) {
            finish();
            return;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    @Override
    protected void onPause() {
        super.onPause();
        scanLeDevice(false);
        mLeDeviceListAdapter.clear();
    }





    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {

        final BluetoothDevice device = mLeDeviceListAdapter.getDevice(position);
        if (device == null) return;
        final Intent intent = new Intent(this, DeviceControlActivity.class);
        intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_NAME, device.getName());
        intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_ADDRESS,  device.getAddress());



        if (mScanning) {
            mBluetoothAdapter.stopLeScan(mLeScanCallback);
            mScanning = false;
        }
        startActivity(intent);
    }

    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();
    }


    private class LeDeviceListAdapter extends BaseAdapter {
        private ArrayList<BluetoothDevice> mLeDevices;
        private LayoutInflater mInflator;

        public LeDeviceListAdapter() {
            super();
            mLeDevices = new ArrayList<BluetoothDevice>();
            mInflator = DeviceScanActivity.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;

            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();
            }

            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;
        }

    }


    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();
                        }
                    });
                }
            };

    static class ViewHolder {
        TextView deviceName;
        TextView deviceAddress;
    }
}

这是数据助手

package com.example.android.bluetoothlegatt;



public class DatabaseHelper extends SQLiteOpenHelper {
    public static final String DATABASE_NAME="mydb.db";
    public static final String TABLE_NAME="mytable";
    public static final String COL_1="MobileID";
    public static final String COL_2="DeviceName";
    public static final String COL_3="Time";

    public DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, 1);

    }



    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("create table " + TABLE_NAME + "(MobileID TEXT, DeviceName TEXT,  Time TEXT)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXIST "+TABLE_NAME);
        onCreate(db);
    }

    public boolean insertData(String mobileid, String devicename, String time)
    {
        SQLiteDatabase db= this.getWritableDatabase();
        ContentValues contentValues=new ContentValues();
        contentValues.put(COL_1,mobileid);
        contentValues.put(COL_2,devicename);
        contentValues.put(COL_3,time);
        long result=db.insert(TABLE_NAME,null,contentValues);
        if(result==-1)
            return false;
        else
            return true;
    }

}

Answer 1

插入命令可以像这样放在mLeScanCallback里面吗？:

...

private BluetoothAdapter.LeScanCallback mLeScanCallback =
        new BluetoothAdapter.LeScanCallback() {

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

                // insert the device into the SQLite database
                String date = new SimpleDateFormat("ddMMyyHHmmss").format(new Date());
                myDb.insertData(device.getAddress(), device.getName() , date);

                // add device to list displayed on GUI
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        mLeDeviceListAdapter.addDevice(device);
                        mLeDeviceListAdapter.notifyDataSetChanged();
                    }
                });
            }
        };

...

上面的代码使用 BluetoothDevice device 的 mac 地址作为插入命令的 MobileId 传递给回调。

如何将信标名称插入数据库？

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