非主线程更新UI

  解决办法
  1：子线程发message给主线程，去更新UI 

---

   private HandlerThread workerThread;
   private static WorkerHandler workerHandler = null;
   private static TimeoutHandler timeoutHandler = null;

---

   workerThread = new HandlerThread("workerThread");
    workerThread.setPriority(Thread.MIN_PRIORITY);
    workerThread.start();
    workerHandler = new WorkerHandler(workerThread.getLooper());
    timeoutHandler = new TimeoutHandler(Looper.getMainLooper());//传主线程looper

---

private class WorkerHandler extends Handler {

    private WorkerHandler(Looper looper) {
        super(looper);
    }

    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case XXXXXXXXXXXXX:
             Message message = new Message();
            message.what = a;
            //Bundle 携带对象，对象需要实现序列化 ,此例使用Serializable进行序列化       
            Bundle bundle = new Bundle();
            bundle.putSerializable("CachedBluetoothDevice",CachedBluetoothDevice);
            message.setData(bundle);
            timeoutHandler.sendMessage(message);
                break;
        }
    }
}

private class TimeoutHandler extends Handler {

    private TimeoutHandler(Looper looper) {
        super(looper);
    }

    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case a:
            CachedBluetoothDevice ddevice =  (CachedBluetoothDevice)msg.getData().get("CachedBluetoothDevice");
            ............................
                break;
            default:
                break;
        }
    }
}

---

Bundle 对象实现序列化方式有2种
 1： public class Xxxxx implements Serializable {}
 2:  public class Xxxxx implements Parcelable{
     protected String _address = "";
	 protected String _name = "";
	 protected int _code;

     public Xxxxx (Parcel parcel) {
    _name = parcel.readString();
    _address = parcel.readString();
    _code = parcel.readInt();

}

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(_name);
    dest.writeString(_address);
    dest.writeInt(_code);
}

public static final Creator<Xxxxx > CREATOR = new Creator<Xxxxx >() {
    @Override
    public Xxxxx createFromParcel(Parcel parcel) {
        return new Xxxxx (parcel);
    }

    @Override
    public Xxxxx [] newArray(int i) {
        return new Xxxxx [i];
    }
};
 }

---

2:runOnUiThread
//注意判空

getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
}

});