使用Banner + MVP + OkHttp实现轮播

今天我们一起探讨一下通过banner实现轮播图,今天我们就来写一下.

    banner轮播依赖在这里我们用flybanner

    implementation \'com.recker.flybanner:flybanner:1.3\'

        权限

<uses-permission android:name=\"android.permission.INTERNET\"/>

封装一个OkHttpUtil

public class OkHttpUtil {

    private OkHttpListener mOkHttpListener;

    private Handler mHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what){
                case 0://成功
                    String data = (String) msg.obj;
                    mOkHttpListener.OkHttpSuccess(data);
                    break;
                case 1://失败
                    String error = (String) msg.obj;
                    mOkHttpListener.OkHttpError(error);
                    break;
            }
        }
    };

    //生成    OkHttpListener  set方法
    public void setOkHttpListener(OkHttpListener okHttpListener) {
        mOkHttpListener = okHttpListener;
    }


    public OkHttpUtil OkHttpGet(String url){
        //获取clench对象
        OkHttpClient okHttpClient = new OkHttpClient();
        //获取Request对象
        Request request = new Request.Builder().url(url).build();
        okHttpClient.newCall(request).enqueue(new Callback() {

            /**
             * 失败回调方法
             * @param call
             * @param e
             */
            @Override
            public void onFailure(Call call, IOException e) {
                Message message = new Message();
                message.what = 1;
                message.obj = e.getMessage();
                mHandler.sendMessage(message);
            }

            /**
             * 成功回调方法
             * @param call
             * @param response
             * @throws IOException
             */
            @Override
            public void onResponse(Call call, Response response) throws IOException {
               Message message = new Message();
               message.what = 0;
               message.obj = response.body().string();
               mHandler.sendMessage(message);
            }
        });
        return this;
    }


    public OkHttpUtil OkHttoPost(String url, FormBody formBody){
        //创建 clench 对象
        OkHttpClient okHttpClient = new OkHttpClient();
        //获取Request
        Request request = new Request.Builder().url(url).post(formBody).build();
        okHttpClient.newCall(request).enqueue(new Callback() {

            /**
             * 失败回调方法
             * @param call
             * @param e
             */
            @Override
            public void onFailure(Call call, IOException e) {
                Message message = new Message();
                message.what = 1;
                message.obj = e.getMessage();
                mHandler.sendMessage(message);
            }

            /**
             * 成功回调方法
             * @param call
             * @param response
             * @throws IOException
             */
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Message message = new Message();
                message.what = 0;
                message.obj = response.body().string();
                mHandler.sendMessage(message);
            }
        });
        return this;
    }

    //定义一个接口,进行回调
    public interface OkHttpListener{
        //成功
        void OkHttpSuccess(String data);
        //失败
        void OkHttpError(String error);

    }
}

封装bean实体类

public class BannerBean {
    private String msg;
    private String code;
    private List<DataBean> data;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public List<DataBean> getData() {
        return data;
    }

    public void setData(List<DataBean> data) {
        this.data = data;
    }

    public static class DataBean {
        private int aid;
        private String createtime;
        private String icon;
        private   productId;
        private String  ;
        private int type;
        private String url;

        public int getAid() {
            return aid;
        }

        public void setAid(int aid) {
            this.aid = aid;
        }

        public String getCreatetime() {
            return createtime;
        }

        public void setCreatetime(String createtime) {
            this.createtime = createtime;
        }

        public String getIcon() {
            return icon;
        }

        public void setIcon(String icon) {
            this.icon = icon;
        }

        public   getProductId() {
            return productId;
        }

        public void setProductId(  productId) {
            this.productId = productId;
        }

        public String get () {
            return  ;
        }

        public void set (String  ) {
            this.  =  ;
        }

        public int getType() {
            return type;
        }

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

        public String getUrl() {
            return url;
        }

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

 MVP

callback接口

public interface MyCallBack {
    void onSuccess(List<BannerBean.DataBean> dataBeans);
    void onFailed(String error);
}

view层接口

public interface BannerView {
    void onBannerSuccess(List<BannerBean.DataBean> dataBeans);
    void onBannerFailed(String error);
}

model层

public class BannerModel {
    public void data(List<BannerBean.DataBean> dataBeans, final MyCallBack callBack){
        new OkHttpUtil().OkHttpGet(Apis.BANNER_URL).setOkHttpListener(new OkHttpUtil.OkHttpListener() {
            @Override
            public void OkHttpSuccess(String data) {
                Gson gson = new Gson();
                BannerBean bannerBean = gson.fromJson(data, BannerBean.class);
                List<BannerBean.DataBean> beans = bannerBean.getData();
                if (bannerBean.getCode().equals(\"0\")){
                    callBack.onSuccess(beans);
                }else {
                    callBack.onFailed(bannerBean.getMsg());
                }
            }
            @Override
            public void OkHttpError(String error) {

            }
        });
    }
}

presenter层    用于view层和model层交互

public class BannerPresenter {
    private BannerView mBannerView;
    private BannerModel mBannerModel;
    public BannerPresenter(BannerView bannerView) {
        mBannerView = bannerView;
        mBannerModel = new BannerModel();
    }

    //解绑
    public void datechView(){
        mBannerView = null;
    }

    public void bannerData(List<BannerBean.DataBean> dataBeans){
        mBannerModel.data(dataBeans, new MyCallBack() {
            @Override
            public void onSuccess(List<BannerBean.DataBean> dataBeans) {
                mBannerView.onBannerSuccess(dataBeans);
            }

            @Override
            public void onFailed(String error) {
                mBannerView.onBannerFailed(error);
            }
        });
    }
}

MainActivity

public class MainActivity extends AppCompatActivity implements BannerView {
    private FlyBanner mBanner;
    private BannerPresenter mBannerPresenter;
    private List<BannerBean.DataBean> mDataBeans = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        mBannerPresenter = new BannerPresenter(this);
        mBannerPresenter.bannerData(mDataBeans);
    }

    private void initView() {
        mBanner = (FlyBanner) findViewById(R.id.banner);
    }

    //访问数据成功
    @Override
    public void onBannerSuccess(List<BannerBean.DataBean> dataBeans) {
        List<String> list = new ArrayList<>();
        for (int i = 0; i < dataBeans.size(); i++) {
            list.add(dataBeans.get(i).getIcon().replace(\"https\", \"http\"));
        }
        mBanner.setImagesUrl(list);
    }

    @Override
    public void onBannerFailed(String error) {

    }


    /**
     * 防止内存泄露
     */
    @Override
    protected void onDestroy() {
        super.onDestroy();
        mBannerPresenter.datechView();
    }
}

main_activity布局

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

    <com.recker.flybanner.FlyBanner
        android:id=\"@+id/banner\"
        android:layout_width=\"match_parent\"
        android:layout_height=\"200dp\" />

</LinearLayout>