Android和BLE模块连接通信

package com.TANK.temperature.BT;


import java.util.UUID;



import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.Context;
import android.util.Log;

public class BluetoothLeClass{
    private final static String TAG = BluetoothLeClass.class.getSimpleName();

    private BluetoothManager mBluetoothManager;
    private BluetoothAdapter mBluetoothAdapter;
    private String mBluetoothDeviceAddress;
    private BluetoothGatt mBluetoothGatt;

	public interface OnConnectListener {
		public void onConnect(BluetoothGatt gatt);
	}
	public interface OnDisconnectListener {
		public void onDisconnect(BluetoothGatt gatt);
	}
	public interface OnServiceDiscoverListener {
		public void onServiceDiscover(BluetoothGatt gatt);
	}
	public interface OnDataAvailableListener {
		 public void onCharacteristicRead(BluetoothGatt gatt,
		            BluetoothGattCharacteristic characteristic,
		            int status);
		 public void onCharacteristicWrite(BluetoothGatt gatt,
	                BluetoothGattCharacteristic characteristic);
	}
    
	private OnConnectListener mOnConnectListener;
	private OnDisconnectListener mOnDisconnectListener;
	private OnServiceDiscoverListener mOnServiceDiscoverListener;
	private OnDataAvailableListener mOnDataAvailableListener;
	private Context mContext;
	public void setOnConnectListener(OnConnectListener l){
		mOnConnectListener = l;
	}
	public void setOnDisconnectListener(OnDisconnectListener l){
		mOnDisconnectListener = l;
	}
	public void setOnServiceDiscoverListener(OnServiceDiscoverListener l){
		mOnServiceDiscoverListener = l;
	}
	public void setOnDataAvailableListener(OnDataAvailableListener l){
		mOnDataAvailableListener = l;
	}
	
	public BluetoothLeClass(Context c){
		mContext = c;
	}
	
    // Implements callback methods for GATT events that the app cares about.  For example,
    // connection change and services discovered.
    private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
        @Override
        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
            if (newState == BluetoothProfile.STATE_CONNECTED) {
            	if(mOnConnectListener!=null)
            		mOnConnectListener.onConnect(gatt);
                Log.i(TAG, "Connected to GATT server.");
                // Attempts to discover services after successful connection.
                Log.i(TAG, "Attempting to start service discovery:" +
                        mBluetoothGatt.discoverServices());

            } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
                if(mOnDisconnectListener!=null)
                	mOnDisconnectListener.onDisconnect(gatt);
                Log.i(TAG, "Disconnected from GATT server.");
            }
        }

        @Override
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
            if (status == BluetoothGatt.GATT_SUCCESS && mOnServiceDiscoverListener!=null) {
                	mOnServiceDiscoverListener.onServiceDiscover(gatt);
            } else {
                Log.w(TAG, "onServicesDiscovered received: " + status);
            }
        }

        @Override
        public void onCharacteristicRead(BluetoothGatt gatt,
                                         BluetoothGattCharacteristic characteristic,
                                         int status) {
        	if (mOnDataAvailableListener!=null)
        		mOnDataAvailableListener.onCharacteristicRead(gatt, characteristic, status);
        }

        @Override
        public void onCharacteristicChanged(BluetoothGatt gatt,
                                            BluetoothGattCharacteristic characteristic) {
        	if (mOnDataAvailableListener!=null)
        		mOnDataAvailableListener.onCharacteristicWrite(gatt, characteristic);
        }
    };

    /**
     * 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) mContext.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) {
        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()) {
                return true;
            } else {
                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 setting the autoConnect
        // parameter to false.
        mBluetoothGatt = device.connectGatt(mContext, false, mGattCallback);
        Log.d(TAG, "Trying to create a new connection.");
        mBluetoothDeviceAddress = address;
        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,//便于更新数据
                                              boolean enabled) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
    }

    public void writeCharacteristic(BluetoothGattCharacteristic characteristic){
    	 mBluetoothGatt.writeCharacteristic(characteristic);
    }
    /**
     * 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 BluetoothGattService getSupportedGattService() {//根据service的UUID来获取service
        if (mBluetoothGatt == null) return null;

        return mBluetoothGatt.getService(UUID.fromString("0000fff0-0000-1000-8000-00805f9b34fb"));
    }
}

public class Utils {

    private static HashMap<Integer, String> serviceTypes = new HashMap();
    static {
        // Sample Services.
    	serviceTypes.put(BluetoothGattService.SERVICE_TYPE_PRIMARY, "PRIMARY");
    	serviceTypes.put(BluetoothGattService.SERVICE_TYPE_SECONDARY, "SECONDARY");
    }
    
    public static String getServiceType(int type){
    	return serviceTypes.get(type);
    }
    

    //-------------------------------------------    
    private static HashMap<Integer, String> charPermissions = new HashMap();
    static {
    	charPermissions.put(0, "UNKNOW");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_READ, "READ");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED, "READ_ENCRYPTED");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED_MITM, "READ_ENCRYPTED_MITM");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_WRITE, "WRITE");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED, "WRITE_ENCRYPTED");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED_MITM, "WRITE_ENCRYPTED_MITM");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_WRITE_SIGNED, "WRITE_SIGNED");
    	charPermissions.put(BluetoothGattCharacteristic.PERMISSION_WRITE_SIGNED_MITM, "WRITE_SIGNED_MITM");	
    }
    
    public static String getCharPermission(int permission){
    	return getHashMapValue(charPermissions,permission);
    }
    //-------------------------------------------    
    private static HashMap<Integer, String> charProperties = new HashMap();
    static {
    	
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_BROADCAST, "BROADCAST");
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS, "EXTENDED_PROPS");
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_INDICATE, "INDICATE");
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_NOTIFY, "NOTIFY");
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_READ, "READ");
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_SIGNED_WRITE, "SIGNED_WRITE");
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_WRITE, "WRITE");
    	charProperties.put(BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE, "WRITE_NO_RESPONSE");
    }
    
    public static String getCharPropertie(int property){
    	return getHashMapValue(charProperties,property);
    }
    
    //--------------------------------------------------------------------------
    private static HashMap<Integer, String> descPermissions = new HashMap();
    static {
    	descPermissions.put(0, "UNKNOW");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_READ, "READ");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_READ_ENCRYPTED, "READ_ENCRYPTED");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_READ_ENCRYPTED_MITM, "READ_ENCRYPTED_MITM");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_WRITE, "WRITE");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_WRITE_ENCRYPTED, "WRITE_ENCRYPTED");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_WRITE_ENCRYPTED_MITM, "WRITE_ENCRYPTED_MITM");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_WRITE_SIGNED, "WRITE_SIGNED");
    	descPermissions.put(BluetoothGattDescriptor.PERMISSION_WRITE_SIGNED_MITM, "WRITE_SIGNED_MITM");
    }
    
    public static String getDescPermission(int property){
    	return getHashMapValue(descPermissions,property);
    }
    
    //这段代码没看明白，欢迎大神指教
    private static String getHashMapValue(HashMap<Integer, String> hashMap,int number){
    	String result =hashMap.get(number);
    	if(TextUtils.isEmpty(result)){
    		List<Integer> numbers = getElement(number);
    		result="";
    		for(int i=0;i<numbers.size();i++){
    			result+=hashMap.get(numbers.get(i))+"|";
    		}
    	}
    	return result;
    }

    /**
     * 位运算结果的反推函数10 -> 2 | 8;
     */
    static private List<Integer> getElement(int number){
    	List<Integer> result = new ArrayList<Integer>();
        for (int i = 0; i < 32; i++){
            int b = 1 << i;
            if ((number & b) > 0) 
            	result.add(b);
        }
        
        return result;
    }
    
    
    public static String bytesToHexString(byte[] src){  
        StringBuilder stringBuilder = new StringBuilder("");  
        if (src == null || src.length <= 0) {  
            return null;  
        }  
        for (int i = 0; i < src.length; i++) {  
            int v = src[i] & 0xFF;  
            String hv = Integer.toHexString(v);  
            if (hv.length() < 2) {  
                stringBuilder.append(0);  
            }  
            stringBuilder.append(hv);  
        }  
        return stringBuilder.toString();  
    }  
}