AndroidStudio自带的“SwipeRefreshLay

作者: 穿越平行宇宙 | 来源:发表于2019-07-07 15:39 被阅读0次

使用MVP 实现请求数据，Model 路径如下如所示：

image.png

首先使用MVP请求数据

1. 页面布局

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".view.MainActivity">

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeRefreshLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rlv"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        </android.support.v7.widget.RecyclerView>


    </android.support.v4.widget.SwipeRefreshLayout>

</LinearLayout>

recycler_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/iv"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_margin="20dp"
        android:src="@mipmap/ic_launcher" />

    <TextView
        android:id="@+id/tv_time"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignTop="@id/iv"
        android:layout_margin="10dp"
        android:layout_toRightOf="@id/iv"
        android:text="@string/app_name" />

    <TextView
        android:id="@+id/tv_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/tv_time"
        android:layout_margin="10dp"
        android:layout_toRightOf="@id/iv"
        android:text="@string/app_name" />


</RelativeLayout>

2. bean包下的数据实体类

WealBean.java

public class WealBean {


    /**
     * error : false
     * results : [{"_id":"5c6a4ae99d212226776d3256","createdAt":"2019-02-18T06:04:25.571Z","desc":"2019-02-18","publishedAt":"2019-02-18T06:05:41.975Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1g0ajj4h6ndj30sg11xdmj.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c6385b39d21225dd7a417ce","createdAt":"2019-02-13T02:49:23.946Z","desc":"2019-02-13","publishedAt":"2019-02-13T02:49:33.16Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1g04lsmmadlj31221vowz7.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c4578db9d212264d4501d40","createdAt":"2019-01-21T07:46:35.304Z","desc":"2019-01-21","publishedAt":"2019-01-21T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fze94uew3jj30qo10cdka.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c2dabdb9d21226e068debf9","createdAt":"2019-01-03T06:29:47.895Z","desc":"2019-01-03","publishedAt":"2019-01-03T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fytdr77urlj30sg10najf.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c25db189d21221e8ada8664","createdAt":"2018-12-28T08:13:12.688Z","desc":"2018-12-28","publishedAt":"2018-12-28T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fymj13tnjmj30r60zf79k.jpg","used":true,"who":"lijinshanmx"},{"_id":"5c12216d9d21223f5a2baea2","createdAt":"2018-12-13T09:07:57.2Z","desc":"2018-12-13","publishedAt":"2018-12-13T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fy58bi1wlgj30sg10hguu.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bfe1a5b9d2122309624cbb7","createdAt":"2018-11-28T04:32:27.338Z","desc":"2018-11-28","publishedAt":"2018-11-28T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fxno2dvxusj30sf10nqcm.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bf22fd69d21223ddba8ca25","createdAt":"2018-11-19T03:36:54.950Z","desc":"2018-11-19","publishedAt":"2018-11-19T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fxd7vcz86nj30qo0ybqc1.jpg","used":true,"who":"lijinshanmx"},{"_id":"5be14edb9d21223dd50660f8","createdAt":"2018-11-06T08:20:43.656Z","desc":"2018-11-06","publishedAt":"2018-11-06T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fwyf0wr8hhj30ie0nhq6p.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bcd71979d21220315c663fc","createdAt":"2018-10-22T06:43:35.440Z","desc":"2018-10-22","publishedAt":"2018-10-22T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqgy1fwgzx8n1syj30sg15h7ew.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bc434ac9d212279160c4c9e","createdAt":"2018-10-15T06:33:16.497Z","desc":"2018-10-15","publishedAt":"2018-10-15T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fw8wzdua6rj30sg0yc7gp.jpg","used":true,"who":"lijinshanmx"},{"_id":"5bbb0de09d21226111b86f1c","createdAt":"2018-10-08T07:57:20.978Z","desc":"2018-10-08","publishedAt":"2018-10-08T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fw0vdlg6xcj30j60mzdk7.jpg","used":true,"who":"lijinshanmx"},{"_id":"5ba206ec9d2122610aba3440","createdAt":"2018-09-19T08:21:00.295Z","desc":"2018-09-19","publishedAt":"2018-09-19T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fvexaq313uj30qo0wldr4.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b9771a29d212206c1b383d0","createdAt":"2018-09-11T07:41:22.491Z","desc":"2018-09-11","publishedAt":"2018-09-11T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fv5n6daacqj30sg10f1dw.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b830bba9d2122031f86ee51","createdAt":"2018-08-27T04:21:14.703Z","desc":"2018-08-27","publishedAt":"2018-08-28T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fuo54a6p0uj30sg0zdqnf.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b7b836c9d212201e982de6e","createdAt":"2018-08-21T11:13:48.989Z","desc":"2018-08-21","publishedAt":"2018-08-21T00:00:00.0Z","source":"web","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fuh5fsvlqcj30sg10onjk.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b74e9409d21222c52ae4cb4","createdAt":"2018-08-16T11:02:24.289Z","desc":"2018-08-16","publishedAt":"2018-08-16T00:00:00.0Z","source":"api","type":"福利","url":"https://ws1.sinaimg.cn/large/0065oQSqly1fubd0blrbuj30ia0qp0yi.jpg","used":true,"who":"lijinshan"},{"_id":"5b7102749d2122341d563844","createdAt":"2018-08-13T12:00:52.458Z","desc":"2018-08-13","publishedAt":"2018-08-13T00:00:00.0Z","source":"api","type":"福利","url":"https://ww1.sinaimg.cn/large/0065oQSqly1fu7xueh1gbj30hs0uwtgb.jpg","used":true,"who":"lijinshan"},{"_id":"5b6bad449d21226f45755582","createdAt":"2018-08-09T10:56:04.962Z","desc":"2018-08-09","publishedAt":"2018-08-09T00:00:00.0Z","source":"web","type":"福利","url":"https://ww1.sinaimg.cn/large/0065oQSqgy1fu39hosiwoj30j60qyq96.jpg","used":true,"who":"lijinshanmx"},{"_id":"5b67b7fd9d2122195bdbd806","createdAt":"2018-08-06T10:52:45.809Z","desc":"2018-08-06","publishedAt":"2018-08-06T00:00:00.0Z","source":"api","type":"福利","url":"https://ww1.sinaimg.cn/large/0065oQSqly1ftzsj15hgvj30sg15hkbw.jpg","used":true,"who":"lijinshan"}]
     */

    private boolean error;
    private List<ResultsBean> results;

    public boolean isError() {
        return error;
    }

    public void setError(boolean error) {
        this.error = error;
    }

    public List<ResultsBean> getResults() {
        return results;
    }

    public void setResults(List<ResultsBean> results) {
        this.results = results;
    }

    public static class ResultsBean {
        /**
         * _id : 5c6a4ae99d212226776d3256
         * createdAt : 2019-02-18T06:04:25.571Z
         * desc : 2019-02-18
         * publishedAt : 2019-02-18T06:05:41.975Z
         * source : web
         * type : 福利
         * url : https://ws1.sinaimg.cn/large/0065oQSqly1g0ajj4h6ndj30sg11xdmj.jpg
         * used : true
         * who : lijinshanmx
         */

        private String _id;
        private String createdAt;
        private String desc;
        private String publishedAt;
        private String source;
        private String type;
        private String url;
        private boolean used;
        private String who;

        public String get_id() {
            return _id;
        }

        public void set_id(String _id) {
            this._id = _id;
        }

        public String getCreatedAt() {
            return createdAt;
        }

        public void setCreatedAt(String createdAt) {
            this.createdAt = createdAt;
        }

        public String getDesc() {
            return desc;
        }

        public void setDesc(String desc) {
            this.desc = desc;
        }

        public String getPublishedAt() {
            return publishedAt;
        }

        public void setPublishedAt(String publishedAt) {
            this.publishedAt = publishedAt;
        }

        public String getSource() {
            return source;
        }

        public void setSource(String source) {
            this.source = source;
        }

        public String getType() {
            return type;
        }

        public void setType(String type) {
            this.type = type;
        }

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public boolean isUsed() {
            return used;
        }

        public void setUsed(boolean used) {
            this.used = used;
        }

        public String getWho() {
            return who;
        }

        public void setWho(String who) {
            this.who = who;
        }
    }
}

3. api 包下的（请求数据接口的封装）

RequestInterface.java

public interface RequestInterface {

    // http://gank.io/api/data/福利/20/1

    String wealUrl = "http://gank.io/api/data/福利/20/";

    @GET
    Observable<WealBean> setData(@Url String page);

}

RequestManager.java

public class RequestManager {

    private static RequestManager mRequestManager;
    private static Retrofit retrofit;

    private RequestManager() {
        initInterface();
    }


    // 初始化Retrofit 的对象
    private void initInterface() {

        OkHttpClient client = new OkHttpClient.Builder()
                .connectTimeout(5000, TimeUnit.MILLISECONDS)
                .readTimeout(5000, TimeUnit.MILLISECONDS)
                .writeTimeout(5000, TimeUnit.MILLISECONDS)
                .build();

        retrofit = new Retrofit.Builder()
                .client(client)
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create())
                .baseUrl(RequestInterface.wealUrl)
                .build();

    }


    // 使用单例模式（懒汉式）构建当前类的对象
    public static RequestManager getManager() {
        if (mRequestManager == null) {
            synchronized (RequestManager.class) {
                if (mRequestManager == null) {
                    mRequestManager = new RequestManager();
                }
            }
        }
        return mRequestManager;
    }


    public RequestInterface getRetrofit() {
        return retrofit.create(RequestInterface.class);
    }


}

4.model 包下的（model 接口与实现）

WealModel.java

public interface WealModel {

    void initData(String page, CallBack callBack);

    interface CallBack {

        void onSuccess(WealBean bean);

        void onFail(String message);

    }
    
}

WealModelIpi.java

public class WealModelIpi implements WealModel {

    @Override
    public void initData(String page, final CallBack callBack) {

        RequestManager.getManager().getRetrofit()
                .setData(page)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<WealBean>() {
                    @Override
                    public void onSubscribe(Disposable d) {

                    }

                    @Override
                    public void onNext(WealBean value) {
                        if (value != null && value.getResults() != null && value.getResults().size() > 0) {
                            callBack.onSuccess(value);
                        } else {
                            callBack.onFail("解析失败");
                        }
                    }

                    @Override
                    public void onError(Throwable e) {
                        callBack.onFail(e.getMessage());
                    }

                    @Override
                    public void onComplete() {

                    }
                });


    }

}

5.view 包下的（view 接口）

WealView.java

public interface WealView {

    void onSuccess(WealBean bean);

    void onFail(String message);

}

6.presenter 包下的（presenter 接口与实现）

WealPresenter.java

public interface WealPresenter {

    void getData(String page);

}

WealPresenterIpi.java

public class WealPresenterIpi implements WealPresenter {

    private WealView mWealView;
    private WealModel mWealModel;


    public WealPresenterIpi(WealView wealView) {
        mWealView = wealView;
        mWealModel = new WealModelIpi();
    }

    @Override
    public void getData(String page) {
        if (mWealModel != null) {
            mWealModel.initData(page, new WealModel.CallBack() {
                @Override
                public void onSuccess(WealBean bean) {
                    if (mWealView != null) {
                        mWealView.onSuccess(bean);
                    }
                }

                @Override
                public void onFail(String message) {
                    if (mWealView != null) {
                        mWealView.onFail(message);
                    }
                }
            });
        }
    }

}

7.UI页面的修改

MainActivity.java

public class MainActivity extends AppCompatActivity implements WealView, SwipeRefreshLayout.OnRefreshListener {

    private RecyclerView mRlv;
    private SwipeRefreshLayout mSwipeRefreshLayout;
    private List<WealBean.ResultsBean> mList;
    private int page = 1;
    private HomeAdapter mAdapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initData();
    }

    private void initData() {

        WealPresenterIpi wealPresenterIpi = new WealPresenterIpi(this);
        wealPresenterIpi.getData(page + "");

    }

    @Override
    public void onSuccess(WealBean bean) {

        if (page == 1) {
            mList.clear();
            Toast.makeText(this, "刷新成功", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "加载成功", Toast.LENGTH_SHORT).show();
        }

        List<WealBean.ResultsBean> results = bean.getResults();

        mList.addAll(results);
        mAdapter.setData(mList);
        mAdapter.notifyDataSetChanged();

        // 设置刷新结束
        mSwipeRefreshLayout.setRefreshing(false);

    }

    @Override
    public void onFail(String message) {
        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
    }

    private void initView() {
        // 获取控件对象
        mRlv = (RecyclerView) findViewById(R.id.rlv);
        mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);

        // 设置数据源
        mList = new ArrayList<>();

        // 设置显示方式
        mRlv.setLayoutManager(new LinearLayoutManager(this));

        // 设置适配器
        mAdapter = new HomeAdapter(this, mList);
        mRlv.setAdapter(mAdapter);

        // 加载更多
        initLoading();

        // 下拉刷新
        mSwipeRefreshLayout.setOnRefreshListener(this);

    }

    private void initLoading() {

        // 上拉加载更多
        mRlv.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);

                // 判断是否到达底部
                if (newState == RecyclerView.SCROLL_STATE_IDLE) {

                    // 获取布局管理器对象
                    RecyclerView.LayoutManager layoutManager = mRlv.getLayoutManager();
                    if (layoutManager instanceof LinearLayoutManager) {

                        LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;

                        // 找到最后一个可见的条目
                        int lastVisibleItemPosition = linearLayoutManager.findLastVisibleItemPosition();

                        // 获取数据的总数量
                        int itemCount = recyclerView.getAdapter().getItemCount();

                        if (lastVisibleItemPosition == itemCount - 1) {
                            // 加载数据
                            page++;
                            initData();
                        }


                    }


                }


            }
        });

    }

    @Override
    public void onRefresh() {
        page = 1;
        initData();
    }
}

HomeAdapter.java

public class MainActivity extends AppCompatActivity implements WealView, SwipeRefreshLayout.OnRefreshListener {

    private RecyclerView mRlv;
    private SwipeRefreshLayout mSwipeRefreshLayout;
    private List<WealBean.ResultsBean> mList;
    private int page = 1;
    private HomeAdapter mAdapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initData();
    }

    private void initData() {

        WealPresenterIpi wealPresenterIpi = new WealPresenterIpi(this);
        wealPresenterIpi.getData(page + "");

    }

    @Override
    public void onSuccess(WealBean bean) {

        if (page == 1) {
            mList.clear();
            Toast.makeText(this, "刷新成功", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "加载成功", Toast.LENGTH_SHORT).show();
        }

        List<WealBean.ResultsBean> results = bean.getResults();

        mList.addAll(results);
        mAdapter.setData(mList);
        mAdapter.notifyDataSetChanged();

        // 设置刷新结束
        mSwipeRefreshLayout.setRefreshing(false);

    }

    @Override
    public void onFail(String message) {
        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
    }

    private void initView() {
        // 获取控件对象
        mRlv = (RecyclerView) findViewById(R.id.rlv);
        mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);

        // 设置数据源
        mList = new ArrayList<>();

        // 设置显示方式
        mRlv.setLayoutManager(new LinearLayoutManager(this));

        // 设置适配器
        mAdapter = new HomeAdapter(this, mList);
        mRlv.setAdapter(mAdapter);

        // 加载更多
        initLoading();

        // 下拉刷新
        mSwipeRefreshLayout.setOnRefreshListener(this);

    }

    private void initLoading() {

        // 上拉加载更多
        mRlv.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);

                // 判断是否到达底部
                if (newState == RecyclerView.SCROLL_STATE_IDLE) {

                    // 获取布局管理器对象
                    RecyclerView.LayoutManager layoutManager = mRlv.getLayoutManager();
                    if (layoutManager instanceof LinearLayoutManager) {

                        LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;

                        // 找到最后一个可见的条目
                        int lastVisibleItemPosition = linearLayoutManager.findLastVisibleItemPosition();

                        // 获取数据的总数量
                        int itemCount = recyclerView.getAdapter().getItemCount();

                        if (lastVisibleItemPosition == itemCount - 1) {
                            // 加载数据
                            page++;
                            initData();
                        }


                    }


                }


            }
        });

    }

    @Override
    public void onRefresh() {
        page = 1;
        initData();
    }
}

效果图如下：

SwipeRefreshLayout使用.gif

AndroidStudio自带的“SwipeRefreshLay

使用MVP 实现请求数据，Model 路径如下如所示：

首先使用MVP请求数据

1. 页面布局

2. bean包下的数据实体类

3. api 包下的（请求数据接口的封装）

4.model 包下的（model 接口与实现）

5.view 包下的（view 接口）

6.presenter 包下的（presenter 接口与实现）

7.UI页面的修改

效果图如下：

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读

AndroidStudio自带的“SwipeRefreshLay

使用MVP 实现请求数据，Model 路径如下如所示：

首先使用MVP请求数据

1. 页面布局

2. bean包下的数据实体类

3. api 包下的（请求数据接口的封装）

4.model 包下的 （model 接口与实现）

5.view 包下的（view 接口）

6.presenter 包下的（presenter 接口与实现）

7.UI页面的修改

效果图如下：

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读

4.model 包下的（model 接口与实现）