BaseHandler

public class BaseHandler extends Handler {

private WeakReferencewr;

    //接口不要用局部变量,会被GC的.

    public BaseHandler(BaseHandler.BaseHandlerCallBack callBack) {

wr =new WeakReference<>(callBack);

    }

@Override

    public void handleMessage(Message msg) {

super.handleMessage(msg);

        BaseHandler.BaseHandlerCallBack callBack =wr.get();

        if (callBack !=null) {

callBack.handlerCallBack(msg);

        }

}

public interface BaseHandlerCallBack {

void handlerCallBack(Message msg);

    }

}