BLE连接状态133和清除缓存

时间:2018-05-28 09:27:39

标签: android rest bluetooth bluetooth-lowenergy nrf52

问题1 。我在连接BLE外围设备时遇到133连接状态错误。
问题2。很少有时间回到扫描活动,应用程序无法显示已扫描的BLE设备。

为了解决这个问题我正在关闭然后再打开外围设备,然后再次开始扫描,扫描将显示。

以下是 Bluetoothleservice.java文件

import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

import java.util.List;
import java.util.UUID;

public class BluetoothLeService extends Service {
    private final static String TAG = "TAG";

    private BluetoothManager mBluetoothManager;
    private BluetoothAdapter mBluetoothAdapter;
    private String mBluetoothDeviceAddress;
    private BluetoothGatt mBluetoothGatt;
    private int mConnectionState = STATE_DISCONNECTED;

    private static final int STATE_DISCONNECTED = 0;
    private static final int STATE_CONNECTING = 1;
    private static final int STATE_CONNECTED = 2;

    public final static String ACTION_GATT_CONNECTED =
            "com.bledemo.bluetooth.le.ACTION_GATT_CONNECTED";
    public final static String ACTION_GATT_DISCONNECTED =
            "com.bledemo.bluetooth.le.ACTION_GATT_DISCONNECTED";
    public final static String ACTION_GATT_SERVICES_DISCOVERED =
            "com.bledemo.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED";
    public final static String ACTION_DATA_AVAILABLE =
            "com.bledemo.bluetooth.le.ACTION_DATA_AVAILABLE";
    public final static String ACTION_DATA_WRITTEN =
            "com.bledemo.bluetooth.le.ACTION_DATA_WRITTEN";
    public final static String EXTRA_DATA =
            "com.bledemo.bluetooth.le.EXTRA_DATA";


    public final static UUID NORDIC_UART_SERVICE = UUID.fromString("6e400001-b5a3-f393-e0a9-e50e24dcca9e");
    public final static UUID TX_CHARCTERSTIC = UUID.fromString("6e400003-b5a3-f393-e0a9-e50e24dcca9e");
    public final static UUID RX_CHARCTERSTIC = UUID.fromString("6e400002-b5a3-f393-e0a9-e50e24dcca9e");

    //Vinay
    BluetoothGattCharacteristic
            mHomeCharacteristic,
            mTempCharacteristic,
            mLightCharacteristic,
            mLightCharacteristicNotify,
            mLightCharacteristicRead,
            mDeviceNameCharacteristic;

    // Implements callback methods for GATT events that the app cares about.  For bledemo,
    // connection change and services discovered.
    private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
        @Override
        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
            String intentAction;
            Log.i(TAG, "onConnectionStateChange status " + status + " newstate " + newState);
            if (newState == BluetoothProfile.STATE_CONNECTED) {
                intentAction = ACTION_GATT_CONNECTED;
                mConnectionState = STATE_CONNECTED;
                broadcastUpdate(intentAction);
                Log.i(TAG, "Connected to GATT server.");
                // Attempts to discover services after successful connection.

                boolean isServiceDiscovered = mBluetoothGatt.discoverServices();
                Log.i(TAG, "Attempting to start service discovery:" +
                        isServiceDiscovered);
            } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
                intentAction = ACTION_GATT_DISCONNECTED;
                mConnectionState = STATE_DISCONNECTED;
                Log.i(TAG, "Disconnected from GATT server.");
                broadcastUpdate(intentAction);
            }
        }

        @Override
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
            if (status == BluetoothGatt.GATT_SUCCESS) {

                final List<BluetoothGattService> services = gatt.getServices();

                for (BluetoothGattService service : services) {
                    System.out.println("service hrs discoverd " + service.getUuid());

                    if (service.getUuid().equals(NORDIC_UART_SERVICE)) {
                        System.out.println("gap service dicovered" + NORDIC_UART_SERVICE);
                        mLightCharacteristic = service.getCharacteristic(RX_CHARCTERSTIC);
//                        Log.d(TAG, "onServicesDiscovered: " + mLightCharacteristic.getUuid());
                    }


                    if (service.getUuid().equals(NORDIC_UART_SERVICE)) {
                        System.out.println("gap service dicovered");
                        mDeviceNameCharacteristic = service.getCharacteristic(RX_CHARCTERSTIC);
                    }

                    if (service.getUuid().equals(NORDIC_UART_SERVICE)) {
                        mLightCharacteristicNotify = service.getCharacteristic(TX_CHARCTERSTIC);
                        //   mLightCharacteristicRead = service.getCharacteristic(LIGHT_CHARACTERISTIC_READ_UUID);
                        setCharacteristicNotification(mLightCharacteristicNotify, true);
                        System.out.println("service discoverd ");
                    }

                }
             //   broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
            } else {
                Log.w(TAG, "onServicesDiscovered received: " + status);
            }
        }

        @Override
        public void onCharacteristicRead(BluetoothGatt gatt,
                                         BluetoothGattCharacteristic characteristic,
                                         int status) {
            if (status == BluetoothGatt.GATT_SUCCESS) {
                broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
            }
        }

        @Override
        public void onCharacteristicChanged(BluetoothGatt gatt,
                                            BluetoothGattCharacteristic characteristic) {
            Log.e(TAG, "onCharacteristicChanged");


            broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);


        }

        @Override
        public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
            super.onCharacteristicWrite(gatt, characteristic, status);
            broadcastUpdate(ACTION_DATA_WRITTEN, characteristic, status);

        }

        @Override
        public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
            super.onDescriptorWrite(gatt, descriptor, status);
            Log.d(TAG, "onDescriptorWrite "+status);
            broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);

        }
    };

    private void broadcastUpdate(final String action) {
        final Intent intent = new Intent(action);
        sendBroadcast(intent);
    }

    private void broadcastUpdate(final String action, final BluetoothGattCharacteristic characteristic, int status) {
        final Intent intent = new Intent(action);
        intent.putExtra("status", status);
        sendBroadcast(intent);
    }

    private void broadcastUpdate(final String action,
                                 final BluetoothGattCharacteristic characteristic) {
        final Intent intent = new Intent(action);

        // This is special handling for the Heart Rate Measurement profile.  Data parsing is
        // carried out as per profile specifications:
        // http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml

            // For all other profiles, writes the data formatted in HEX.
            final byte[] data = characteristic.getValue();
            if (data != null && data.length > 0) {
                /*final StringBuilder stringBuilder = new StringBuilder(data.length);
                for (byte byteChar : data)
                    stringBuilder.append(String.format("%02X ", byteChar));*/
             //   Log.e("data available", "data available " + stringBuilder.toString());
                intent.putExtra(EXTRA_DATA, new String(data).trim());
            }
        sendBroadcast(intent);
    }

    public class LocalBinder extends Binder {
        public BluetoothLeService getService() {
            return BluetoothLeService.this;
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }

    @Override
    public boolean onUnbind(Intent intent) {
        // After using a given device, you should make sure that BluetoothGatt.close() is called
        // such that resources are cleaned up properly.  In this particular bledemo, close() is
        // invoked when the UI is disconnected from the Service.
        close();
        return super.onUnbind(intent);
    }

    private final IBinder mBinder = new LocalBinder();

    /**
     * Initializes a reference to the local Bluetooth adapter.
     *
     * @return Return true if the initialization is successful.
     */
    public boolean initialize() {
        // For API level 18 and above, get a reference to BluetoothAdapter through
        // BluetoothManager.
        if (mBluetoothManager == null) {
            mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
            if (mBluetoothManager == null) {
                Log.e(TAG, "Unable to initialize BluetoothManager.");
                return false;
            }
        }

        mBluetoothAdapter = mBluetoothManager.getAdapter();
        if (mBluetoothAdapter == null) {
            Log.e(TAG, "Unable to obtain a BluetoothAdapter.");
            return false;
        }

        return true;
    }

    /**
     * Connects to the GATT server hosted on the Bluetooth LE device.
     *
     * @param address The device address of the destination device.
     * @return Return true if the connection is initiated successfully. The connection result
     * is reported asynchronously through the
     * {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
     * callback.
     */
    public boolean connect(final String address) {
        Log.i("OK","Hiiiii, i am here");
        Log.i("OK","BLE MAC : "+address);
        if (mBluetoothAdapter == null || address == null) {
            Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
            return false;
        }

        // Previously connected device.  Try to reconnect.
        if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress)
                && mBluetoothGatt != null) {
            Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection.");
            if (mBluetoothGatt.connect()) {
                mConnectionState = STATE_CONNECTING;
                return true;
            } else {
                Log.d(TAG, "could not make the connection");
                return false;
            }
        }

        final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
        if (device == null) {
            Log.w(TAG, "Device not found.  Unable to connect.");
            return false;
        }
        // We want to directly connect to the device, so we are SettingDevice the autoConnect
        // parameter to false.
        mBluetoothGatt = device.connectGatt(this, false, mGattCallback);
        Log.d(TAG, "Trying to create a new connection.");
        mBluetoothDeviceAddress = address;
        mConnectionState = STATE_CONNECTING;
        return true;
    }

    /**
     * Disconnects an existing connection or cancel a pending connection. The disconnection result
     * is reported asynchronously through the
     * {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
     * callback.
     */
    public void disconnect() {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.disconnect();
    }

    /**
     * After using a given BLE device, the app must call this method to ensure resources are
     * released properly.
     */
    public void close() {
        if (mBluetoothGatt == null) {
            return;
        }
        mBluetoothGatt.close();
        mBluetoothGatt = null;
    }

    /**
     * Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
     * asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
     * callback.
     *
     * @param characteristic The characteristic to read from.
     */
    public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.readCharacteristic(characteristic);
    }

    /**
     * Enables or disables notification on a give characteristic.
     *
     * @param characteristic Characteristic to act on.
     * @param enabled        If true, enable notification.  False otherwise.
     */
    /*public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
                                              boolean enabled) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
        // This is specific to Heart Rate Measurement.
        *//*if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
            BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
                    UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
            descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
            mBluetoothGatt.writeDescriptor(descriptor);
        }*//*
    }*/
    public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
                                              boolean enabled) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }

       BluetoothGattDescriptor descriptor1 = characteristic.getDescriptor(
                UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
        if (descriptor1 != null) {
            descriptor1.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
            while (!mBluetoothGatt.writeDescriptor(descriptor1)) {
                mBluetoothGatt.writeDescriptor(descriptor1);
            }
            Log.w(TAG, "notification enable");
            mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
            //   mBluetoothGatt.setCharacteristicNotification(characteristic, true);
        } else {
            Log.w(TAG, "notification failed no decriptor");
        }
       /* List<BluetoothGattDescriptor> descriptor1ist = characteristic.getDescriptors();
        for (BluetoothGattDescriptor descriptor : descriptor1ist) {
            descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
            mBluetoothGatt.writeDescriptor(descriptor);

        }
        mBluetoothGatt.setCharacteristicNotification(characteristic, true);*/
    }
//6e400002-b5a3-f393-e0a9-e50e24dcca9e


    /**
     * Retrieves a list of supported GATT services on the connected device. This should be
     * invoked only after {@code BluetoothGatt#discoverServices()} completes successfully.
     *
     * @return A {@code List} of supported services.
     */
    public List<BluetoothGattService> getSupportedGattServices() {
        if (mBluetoothGatt == null) return null;

        return mBluetoothGatt.getServices();
    }

    public void ON_OFF_Logic(String command) {
        if (mLightCharacteristic != null) {
            mLightCharacteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
            mLightCharacteristic.setValue(command);
            boolean statusLocal = mBluetoothGatt.writeCharacteristic(mLightCharacteristic);

            Log.e("write status", "status " + command + " charactristic " + mLightCharacteristic.getUuid().toString());
        } /*else {
=======
        try {
            if (mLightCharacteristic != null) {
                mLightCharacteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
                mLightCharacteristic.setValue(command);
                boolean statusLocal = mBluetoothGatt.writeCharacteristic(mLightCharacteristic);

                Log.e("write status", "status " + command + " charactristic " + mLightCharacteristic.getUuid().toString());
            }
        }catch (Exception e){
            Log.i("OK",""+e.getLocalizedMessage());
        }

         /*else {
>>>>>>> 56646d2f8f3420a9a3f2fa71374f3c56b4029501
            Log.e("light char","light char is null");
            if (mBluetoothGatt!=null) {
                mBluetoothGatt.disconnect();
            }
        }*/
    }

    //Change Device Name.
    public boolean changeDeviceName(String Name) {
        if (mDeviceNameCharacteristic != null) {
            System.out.println("writing device name");
            mDeviceNameCharacteristic.setValue(Name);
            mBluetoothGatt.writeCharacteristic(mDeviceNameCharacteristic);
            return true;
        } else {
            System.out.println("Device Name Characteristic is not found");
            return false;
        }
    }


}

0 个答案:

没有答案