蓝牙连接成功后获取特征错误

10-14 16:38:54.556 25888-25899/com.bywin_app D/BluetoothGatt﹕ discoverServices() - device: 01:01:60:80:00:01
10-14 16:38:54.566 25888-25888/com.bywin_app I/[Gralloc]﹕ gralloc_unregister_buffer line 259 size180224 base0x63524000 phys_addr0 share_fd77 usage0x933 ion_hnd_debug0x4
10-14 16:38:54.566 25888-25888/com.bywin_app I/[Gralloc]﹕ gralloc_unregister_buffer line 259 size180224 base0x63581000 phys_addr0 share_fd124 usage0x933 ion_hnd_debug0xb
10-14 16:38:54.576 25888-25888/com.bywin_app I/[Gralloc]﹕ gralloc_unregister_buffer line 259 size180224 base0x63550000 phys_addr0 share_fd123 usage0x933 ion_hnd_debug0x8
10-14 16:38:54.656 25888-25888/com.bywin_app I/[Gralloc]﹕ gralloc_register_buffer line 204 size102400 base0x63524000 phys_addr0 share_fd121 usage0x933 ion_hnd_debug0x4
10-14 16:38:54.676 25888-25888/com.bywin_app I/[Gralloc]﹕ gralloc_register_buffer line 204 size102400 base0x6353d000 phys_addr0 share_fd123 usage0x933 ion_hnd_debug0xb
10-14 16:38:56.606 25888-25888/com.bywin_app I/[Gralloc]﹕ gralloc_unregister_buffer line 259 size102400 base0x63524000 phys_addr0 share_fd121 usage0x933 ion_hnd_debug0x4
10-14 16:38:56.606 25888-25888/com.bywin_app I/[Gralloc]﹕ gralloc_unregister_buffer line 259 size102400 base0x6353d000 phys_addr0 share_fd123 usage0x933 ion_hnd_debug0xb
10-14 16:38:56.966 25888-25900/com.bywin_app D/BluetoothGatt﹕ onGetService() - Device=01:01:60:80:00:01 UUID=00001800-0000-1000-8000-00805f9b34fb
10-14 16:38:56.976 25888-25960/com.bywin_app D/BluetoothGatt﹕ onGetService() - Device=01:01:60:80:00:01 UUID=00001801-0000-1000-8000-00805f9b34fb
10-14 16:38:56.986 25888-25899/com.bywin_app D/BluetoothGatt﹕ onGetService() - Device=01:01:60:80:00:01 UUID=00001802-0000-1000-8000-00805f9b34fb
10-14 16:38:56.996 25888-25900/com.bywin_app D/BluetoothGatt﹕ onGetService() - Device=01:01:60:80:00:01 UUID=000000fe-0000-1000-8000-00805f9b34fb
10-14 16:38:57.006 25888-25960/com.bywin_app D/BluetoothGatt﹕ onGetService() - Device=01:01:60:80:00:01 UUID=000000aa-0000-1000-8000-00805f9b34fb
10-14 16:38:57.016 25888-25899/com.bywin_app D/BluetoothGatt﹕ onGetCharacteristic() - Device=01:01:60:80:00:01 UUID=00002a00-0000-1000-8000-00805f9b34fb
10-14 16:38:57.016 25888-25900/com.bywin_app D/BluetoothGatt﹕ onGetCharacteristic() - Device=01:01:60:80:00:01 UUID=00002a01-0000-1000-8000-00805f9b34fb
10-14 16:38:57.016 25888-25960/com.bywin_app D/BluetoothGatt﹕ onGetCharacteristic() - Device=01:01:60:80:00:01 UUID=00002a04-0000-1000-8000-00805f9b34fb
10-14 16:38:57.016 25888-25899/com.bywin_app D/BluetoothGatt﹕ onGetCharacteristic() - Device=01:01:60:80:00:01 UUID=00002a05-0000-1000-8000-00805f9b34fb
10-14 16:38:57.016 25888-25900/com.bywin_app D/BluetoothGatt﹕ onGetCharacteristic() - Device=01:01:60:80:00:01 UUID=00002a06-0000-1000-8000-00805f9b34fb
10-14 16:38:57.026 25888-25960/com.bywin_app D/BluetoothGatt﹕ onGetCharacteristic() - Device=01:01:60:80:00:01 UUID=000000ff-0000-1000-8000-00805f9b34fb
10-14 16:38:57.026 25888-25899/com.bywin_app D/BluetoothGatt﹕ onGetCharacteristic() - Device=01:01:60:80:00:01 UUID=000000ab-0000-1000-8000-00805f9b34fb
10-14 16:38:57.026 25888-25900/com.bywin_app D/BluetoothGatt﹕ onGetDescriptor() - Device=01:01:60:80:00:01 UUID=00002902-0000-1000-8000-00805f9b34fb
10-14 16:38:57.026 25888-25960/com.bywin_app D/BluetoothGatt﹕ onGetDescriptor() - Device=01:01:60:80:00:01 UUID=00000000-0000-1000-8000-00805f9b34fb
10-14 16:38:57.026 25888-25899/com.bywin_app D/BluetoothGatt﹕ onGetDescriptor() - Device=01:01:60:80:00:01 UUID=00000000-0000-1000-8000-00805f9b34fb
10-14 16:38:57.026 25888-25900/com.bywin_app D/BluetoothGatt﹕ onSearchComplete() = Device=01:01:60:80:00:01 Status=0
10-14 16:38:57.026 25888-25900/com.bywin_app D/BluetoothGatt﹕ setCharacteristicNotification() - uuid: 000000ff-0000-1000-8000-00805f9b34fb enable: true
10-14 16:38:57.226 25888-25888/com.bywin_app D/BluetoothGatt﹕ readCharacteristic() - uuid: 000000ff-0000-1000-8000-00805f9b34fb
10-14 16:38:57.536 25888-25888/com.bywin_app D/BluetoothGatt﹕ writeCharacteristic() - uuid: 000000ab-0000-1000-8000-00805f9b34fb
10-14 16:38:58.166 25888-25888/com.bywin_app E/BluetoothGatt﹕ android.os.DeadObjectException
at android.os.BinderProxy.transact(Native Method)
at android.bluetooth.IBluetoothGatt$Stub$Proxy.writeCharacteristic(IBluetoothGatt.java:1091)
at android.bluetooth.BluetoothGatt.writeCharacteristic(BluetoothGatt.java:888)
at com.bywin_app.util.Bluetooth$4$2.run(Bluetooth.java:247)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5135)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:798)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:614)
at dalvik.system.NativeStart.main(Native Method)

这里有个Error，应该是某个对象已经不存在引起的异常。是不是连接成功后，中途又断开连接了。
com.bywin_app E/BluetoothGatt﹕ android.os.DeadObjectException
at android.os.BinderProxy.transact(Native Method)