java 接口回调实例详解

public interface DynamicMessageListener { 
/** 
 * 获取网络数据， 
 * @param bean bean 对象 
 */ 
void getDynamicData(List<DynamicBean.DataBean> bean, boolean isMore); 
} 

public class DynamicFragment extends Fragment implements DynamicMessageListener { 
//初始化监听者 
  private DynamicMessageListener listener; 
/** 
   * 获取网络数据 
   * 
   * @param bean bean 对象 
   */ 
 
  @Override 
  public void getDynamicData(List<DynamicBean.DataBean> bean, boolean isMore) { 
    if (bean != null && bean.size() > 0) { 
      if (!isMore) { 
        adapter = new DynamicAdapter(mContext, bean, this, classID); 
        friendLv.setAdapter(adapter); 
        adapter.setListener(this); 
        LLog.e("activity------有数据"); 
      } else { 
        adapter.setData(bean); 
      } 
 
    } 
 
  } 
} 

public class DynamicModel extends BaseModel { 
 
 
  private Context mContext; 
  private NetUtils net; 
  private DynamicMessageListener listener; 
 
  public DynamicModel(Context mContext, DynamicMessageListener listener) { 
    this.mContext = mContext; 
    net = NetUtils.getInstance(); 
    this.listener = listener; 
  } 
/** 
   * 加载网络数据， 
   * @param url  网络url 
   * @param params 请求网络携带的参数 
   */ 
  public void loadData(String url, RequestParams params) { 
    net.sendGetRequest(url, params, new NetUtils.NetUtilsCallBack() { 
      @Override 
      public void getNetdata(String json) { 
        if (json != null) { 
          Gson gson = new Gson(); 
          DynamicBean bean = gson.fromJson(json, DynamicBean.class); 
          List<DynamicBean.DataBean> data = bean.getData(); 
          listener.getDynamicData(data, false); 
          if(data ==null||data.size() <=0 ){ 
            listener.friendsNoData(false); 
            LLog.e("没有数据-----"); 
          } 
        } 
      } 
      @Override 
      public void loadError(int a) { 
        showError(a, mContext); 
      } 
    }); 
  } 
}