介绍

Loader是一个方便Activity控制加载状态，加载缓存的工具类

下载

compile 'com.github.linxin6560:loader:1.0.7'

调用前的工作

1.修改BaseActivity使之实现INetWorkView:

public class BaseActivity extends AppCompatActivity implements INetworkView {

    private DataLoader mLoader;

    @Override
    protected void onDestroy() {
        super.onDestroy();
        destroyLoader();
    }

    @Override
    public void destroyLoader() {
        if (mLoader != null) {
            mLoader.onDestroy();
        }
    }

    @Override
    public void setDataLoader(DataLoader loader) {
        mLoader = loader;
    }
}

2.根据产品UI，实现ILoadStateHelper,IRefreshViewHelper,IListViewHelper 3.编写Model:

public class SingleDataModel extends Model<String> {

    private String response;

    @Override
    public boolean isEmpty() {
        return TextUtils.isEmpty(response);
    }

    @Override
    public void setData(boolean isRefreshing, String response) {
        this.response = response;
    }

    @Override
    protected Call<String> getModelCall() {
        MainApi api = ApiManager.getInstance().getMainApi();
        return api.getTestCall();
    }
}

或者

public class ListDataModel extends ListModel<String, String> {

    public ListDataModel(List<String> list) {
        super(list);
    }

    @Override
    protected boolean ensureHasNext(String response, List<String> mapList) {
        return page < 10;
    }

    @Override
    protected List<String> map(String response) {
        List<String> list = new ArrayList<>();
        int size = mList.size();
        for (int i = 0; i < 20; i++) {
            list.add((i + size) + ":XXXXXXXXXXXXXXXXXXXXXXXXXX");
        }
        return list;
    }

    @Override
    protected Call<String> getModelCall() {
        MainApi api = ApiManager.getInstance().getMainApi();
        return api.getTestCall();
    }
    
    @Override
    protected CacheStrategy<String> getCacheStrategy(Request request) {//如需实现缓存控制
        return new CacheStrategy<String>(request, CacheStrategy.CacheType.READ_CACHE_UPDATE_UI_THEN_NET, 180) {
            @Override
            public boolean isTimeOut() {
                return false;
            }

            @Override
            public String readCache() {
                return null;
            }

            @Override
            public void saveCache(String s) {

            }
        };
    }
}

4.调用：

public class SingleDataActivity extends BaseActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.act_single_data);
        SwipeRefreshLayout layout = (SwipeRefreshLayout) findViewById(R.id.act_single_data_sfl);
        final TextView textView = (TextView) findViewById(R.id.act_single_data_tv);
        SingleDataModel model = new SingleDataModel();
        DataLoader<String> loader = new DataLoader<>(this, model);
        loader.setLoadStateHelper(new LoadStateHelper(layout));//控制加载中，加载失败，加载成功
        loader.setRefreshViewHelper(new RefreshHelper(layout));//控制刷新
        loader.setOnLoadSuccessListener(new OnLoadSuccessListener<String>() {
            @Override
            public void onSuccess(boolean isRefreshing, String response) {
                textView.setText(response);
            }
        });
        loader.load();
    }
}

或者

public class ListDataActivity extends BaseActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.act_list_data);
        SwipeRefreshLayout layout = (SwipeRefreshLayout) findViewById(R.id.act_list_data_sfl);
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.act_list_data_rv);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        List<String> list = new ArrayList<>();
        MyAdapter adapter = new MyAdapter(list);
        recyclerView.setAdapter(adapter);

        ListDataModel model = new ListDataModel(list);
        ListLoader<String, String> loader = new ListLoader<>(this, model);
        loader.setLoadStateHelper(new LoadStateHelper(layout));//控制加载中，加载失败，加载成功
        loader.setRefreshViewHelper(new RefreshHelper(layout));//控制刷新
        loader.setListViewHelper(new RecyclerViewHelper(recyclerView));//控制自动加载下一页
        loader.load();
    }
}

这样子就可以了。