//注：參考AmoMcu原始碼修改。


開啟APP，檢查藍芽是否開啟

BluetoothAdapter mBluetoothAdapter;

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

// Ensures Bluetooth is available on the device and it is enabled. If not,
// displays a dialog requesting user permission to enable Bluetooth.
if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
   Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
   startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
 

藍芽掃描

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);
                }
            }, SCAN_PERIOD);


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

連線GATT服務
繫結一個服務

  Intent gattServiceIntent = new Intent(this, BluetoothLeService.class);
    bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE);
注：BluetoothLeService.java，屬於安卓原始碼，可以到網上下載回來。
// Code to manage Service lifecycle.
    private final ServiceConnection mServiceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName componentName, IBinder service) {
            mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService();
            if (!mBluetoothLeService.initialize()) {
                Log.e(TAG, "Unable to initialize Bluetooth");
                finish();
            }
            // Automatically connects to the device upon successful start-up initialization.
            mBluetoothLeService.connect(mDeviceAddress);
        }
        @Override
        public void onServiceDisconnected(ComponentName componentName) {
            mBluetoothLeService = null;
        }  
    };
 

點選某個特徵值的響應：
獲取前面的資料，不用再次掃描，由掃描頁面得到的資料，傳過來的

b=getIntent().getExtras();
tv_addr.setText(b.getString(EXTRAS_DEVICE_ADDRESS));
mDeviceAddress=b.getString(EXTRAS_DEVICE_ADDRESS);
tv_name.setText(b.getString(EXTRAS_DEVICE_NAME));
mDeviceName=b.getString(EXTRAS_DEVICE_NAME);
tv_rssi.setText(b.getString(EXTRAS_DEVICE_RSSI));

lv=(ExpandableListView)this.findViewById(R.id.expandableListView1);
lv.setOnChildClickListener(servicesListClickListner);


private final ExpandableListView.OnChildClickListener servicesListClickListner =
           new ExpandableListView.OnChildClickListener() {
               @Override
               public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,
                                           int childPosition, long id) {                              
                   if (mGattCharacteristics != null) {
                       final BluetoothGattCharacteristic characteristic =
                               mGattCharacteristics.get(groupPosition).get(childPosition);
                       
                       //當前目標特徵值
                       target_chara=characteristic;
                                              
                       final int charaProp = characteristic.getProperties();
                   
                       if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
                           mNotifyCharacteristic = characteristic;
                           
                           mBluetoothLeService.setCharacteristicNotification(
                                  characteristic, true);
                       }
                      tv_uuid.setText(characteristic.getUuid().toString());
                      Intent intent=new Intent();
                      b.putString("CONNET_SATE", status);
                      b.putString("UUID", characteristic.getUuid().toString());
                      intent.putExtras(b);
                      intent.setClass(MyGattDetail.this, LEDControl.class);
                      startActivity(intent);
                                      
               return true;
                   }             
                   return false;               
              }                       
   };

讀寫特徵值的資料
讀資料：

private static BluetoothGattCharacteristic myCharacteristic=null;
private static BluetoothLeService mBluetoothLeService;
mBluetoothLeService.readCharacteristic(myCharacteristic);

註釋：readCharacteristic該函式會呼叫BluetoothGatt.readCharacteristic(BluetoothGattCharacteristic characteristic)


寫資料：
mBluetoothLeService.writeCharacteristic(myCharacteristic);
註釋：writeCharacteristic該函式會呼叫BluetoothGatt.writeCharacteristic(BluetoothGattCharacteristic characteristic)


示例程式碼：

private char[] buffer =new char [] {0x6F,0x0F,0x0F,0x0F,0x0F,0x0F};
private void send() { 
MyGattDetail.write(ConvertString(buffer));
}

private String ConvertString(char buffer[]){
String nRcvString;
     StringBuffer tStringBuf=new StringBuffer ();
     tStringBuf.append(buffer);      
     nRcvString=tStringBuf.toString();     
     return  nRcvString;
}

device_name = (TextView) findViewById(R.id.ledpage_devname);

ledButton1 = (ToggleButton) findViewById(R.id.ledpage_led1);
ledButton1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if(isChecked){
buffer[1]=0x01;
}else{
buffer[1]=0x00;
}
send();
}
});

ledButton2 = (ToggleButton) findViewById(R.id.ledpage_led2);
ledButton2.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if(isChecked){
buffer[2]=0x01;

}else{
buffer[2]=0x00;
}
send();
}
});
ledButton3 = (ToggleButton) findViewById(R.id.ledpage_led3);
ledButton3.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked){
buffer[3]=0x01;
}else{
buffer[3]=0x00;
}
send();
}
});

ledButton4 = (ToggleButton) findViewById(R.id.ledpage_led4);
ledButton4.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked){
buffer[4]=0x01;
}else{
buffer[4]=0x00;
}
send();
}
});

使用ToggleButton控制元件控制LED：
問題：
使用TI的demo會發現開啟一個LED會比較慢，偶爾還會失效。也就是說會掉幀，考慮大之前的所寫的關於延時值的設定，如下：
Connection Interval（GAPROLE_MIN_CONN_INTERVAL && GAPROLE_MAX_CONN_INTERVAL）- 連線間隔，在BLE的兩個裝置的連線中使用跳頻機制。兩個裝置使用特定的通道傳送和接收資料，然後過一段時間後再使用新的通道（BLE協議棧的鏈路層處理通道的切換）。兩個裝置在切換通道後傳送和接收資料稱為一個連線事件。儘管沒有應用資料被髮送和接收，兩個裝置仍舊會交換鏈路層資料來維持連線。這個連線間隔就是這個兩個連線事件的之間的時間間隔。間隔以1.25ms為單元，連線間隔的範圍的6-3200既7.5ms-4s（4000ms）之間。
由此可以看出：間隔小，適用於那些需要快速反應的任務。LED燈需要快速的反應，所以經過設定如下：

// Minimum connection interval (units of 1.25ms, 80=100ms) if automatic parameter update request is enabled
#define DEFAULT_DESIRED_MIN_CONN_INTERVAL     6//80
// Maximum connection interval (units of 1.25ms, 800=1000ms) if automatic parameter update request is enabled
#define DEFAULT_DESIRED_MAX_CONN_INTERVAL     80//800

這樣子實時體驗就有大大的提升。

注意自己修改底層的設定！下載地址如下：

http://download.csdn.net/detail/liqinghan/9540416