MVPokDemo

来源：互联网发布：钱静怡知乎编辑：程序博客网时间：2024/05/16 05:57

首先添加依赖

compile 'com.squareup.okhttp3:okhttp:3.9.0'

compile 'com.squareup.okhttp3:logging-interceptor:3.9.0'

compile 'com.squareup.okio:okio:1.5.0'

主布局

子布局

添加okhttp的封装

app包下

public class MyApp extends Application {
    public static MyApp mInstance;
    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;

    }
    public static MyApp getInstance() {
        return mInstance;
    }
}

utils包下

/**
* 1. 类的用途如果要将得到的json直接转化为集合建议使用该类
* 该类的onUi() onFailed()方法运行在主线程
* 2. @author forever
* 3. @date 2017/9/24 18:47
*/

public abstract class GsonArrayCallback<T> implements Callback {
    private Handler handler = OkHttp3Utils.getInstance().getHandler();

    //主线程处理
    public abstract void onUi(List<T> list);

    //主线程处理
    public abstract void onFailed(Call call, IOException e);

    //请求失败
    @Override
    public void onFailure(final Call call, final IOException e) {
        handler.post(new Runnable() {
            @Override
            public void run() {
                onFailed(call, e);
            }
        });
    }

    //请求json 并直接返回集合主线程处理
    @Override
    public void onResponse(Call call, Response response) throws IOException {
        final List<T> mList = new ArrayList<T>();

        String json = response.body().string();
        JsonArray array = new JsonParser().parse(json).getAsJsonArray();

        Gson gson = new Gson();

        Class<T> cls = null;
        Class clz = this.getClass();
        ParameterizedType type = (ParameterizedType) clz.getGenericSuperclass();
        Type[] types = type.getActualTypeArguments();
        cls = (Class<T>) types[0];

        for(final JsonElement elem : array){
            //循环遍历把对象添加到集合
            mList.add((T) gson.fromJson(elem, cls));
        }

            handler.post(new Runnable() {
                @Override
                public void run() {
                    onUi(mList);

                }
            });

    }
}

/**
* 1. 类的用途如果要将得到的json直接转化为集合建议使用该类
* 该类的onUi() onFailed()方法运行在主线程
* 2. @author forever
* 3. @date 2017/9/24 18:47
*/

public abstract class GsonObjectCallback<T> implements Callback {
    private Handler handler = OkHttp3Utils.getInstance().getHandler();

    //主线程处理
    public abstract void onUi(T t);

    //主线程处理
    public abstract void onFailed(Call call, IOException e);

    //请求失败
    @Override
    public void onFailure(final Call call, final IOException e) {
        handler.post(new Runnable() {
            @Override
            public void run() {
                onFailed(call, e);
            }
        });
    }

    //请求json 并直接返回泛型的对象主线程处理
    @Override
    public void onResponse(Call call, Response response) throws IOException {
        //如果返回的数据超过1M就不要使用string方法，这样会把数据全部加载到内存中，应该使用流；
        String json = response.body().string();
        Class<T> cls = null;

        Class clz = this.getClass();
        ParameterizedType type = (ParameterizedType) clz.getGenericSuperclass();
        Type[] types = type.getActualTypeArguments();
        cls = (Class<T>) types[0];
        Gson gson = new Gson();
        final T t = gson.fromJson(json, cls);
        handler.post(new Runnable() {
            @Override
            public void run() {
            onUi(t);
            }
        });
    }
}

public class NetWorkUtils {
    //判断网络是否连接
    public static boolean isNetWorkAvailable(Context context) {
        //网络连接管理器
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        //网络信息
        NetworkInfo info = connectivityManager.getActiveNetworkInfo();
        if (info != null) {
            return true;
        }

        return false;
    }

}

/**
* 1. 类的用途封装OkHttp3的工具类用单例设计模式
* 2. @author forever
* 3. @date 2017/9/6 09:19
*/

public class OkHttp3Utils {
    /**
     * 懒汉安全加同步
     * 私有的静态成员变量只声明不创建
     * 私有的构造方法
     * 提供返回实例的静态方法
     */
    private static OkHttp3Utils okHttp3Utils = null;

    private OkHttp3Utils() {
    }

    public static OkHttp3Utils getInstance() {
        if (okHttp3Utils == null) {
            //加同步安全
            synchronized (OkHttp3Utils.class) {
                if (okHttp3Utils == null) {
                    okHttp3Utils = new OkHttp3Utils();
                }
            }

        }

        return okHttp3Utils;
    }

    private static OkHttpClient okHttpClient = null;

    public synchronized static OkHttpClient getOkHttpClient() {
        if (okHttpClient == null) {
            //判空为空创建实例
            // okHttpClient = new OkHttpClient();
/**
* 和OkHttp2.x有区别的是不能通过OkHttpClient直接设置超时时间和缓存了，而是通过OkHttpClient.Builder来设置，
* 通过builder配置好OkHttpClient后用builder.build()来返回OkHttpClient，
* 所以我们通常不会调用new OkHttpClient()来得到OkHttpClient，而是通过builder.build()：
*/
            // File sdcache = getExternalCacheDir();
            //缓存目录
            File sdcache = new File(Environment.getExternalStorageDirectory(), "cache");
            int cacheSize = 10 * 1024 * 1024;
            //OkHttp3拦截器
            HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
                @Override
                public void log(String message) {
                    Log.i("xxx", message.toString());
                }
            });
            //Okhttp3的拦截器日志分类 4种
            //共包含四个级别：NONE、BASIC、HEADER、BODY
            //NONE 不记录 BASIC 请求/响应行 HEADER 请求/响应行 + 头 BODY 请求/响应行 + 头 + 体
            httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

            okHttpClient = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS)
                    //添加OkHttp3的拦截器
                    .addInterceptor(httpLoggingInterceptor)
                    .addNetworkInterceptor(new CacheInterceptor(){
                        @Override
                        public Response intercept(Chain chain) throws IOException {
                            return super.intercept(chain);
                        }
                    })
                    .writeTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS)
                    .cache(new Cache(sdcache.getAbsoluteFile(), cacheSize))
                    .build();
        }
        return okHttpClient;
    }

    private static Handler mHandler = null;

    public synchronized static Handler getHandler() {
        if (mHandler == null) {
            mHandler = new Handler();
        }

        return mHandler;
    }

    /**
     * get请求
     * 参数1 url
     * 参数2 回调Callback
     */

    public static void doGet(String url, Callback callback) {

        //创建OkHttpClient请求对象
        OkHttpClient okHttpClient = getOkHttpClient();
        //创建Request
        Request request = new Request.Builder().url(url).build();
        //得到Call对象
        Call call = okHttpClient.newCall(request);
        //执行异步请求
        call.enqueue(callback);

    }

    /**
     * post请求
     * 参数1 url
     * 参数2 回调Callback
     */

    public static void doPost(String url, Map<String, String> params, Callback callback) {

        //创建OkHttpClient请求对象
        OkHttpClient okHttpClient = getOkHttpClient();
        //3.x版本post请求换成FormBody 封装键值对参数

        FormBody.Builder builder = new FormBody.Builder();
        //遍历集合
        for (String key : params.keySet()) {
            builder.add(key, params.get(key));

        }

        //创建Request
        Request request = new Request.Builder().url(url).post(builder.build()).build();

        Call call = okHttpClient.newCall(request);
        call.enqueue(callback);

    }

    /**
     * post请求上传文件
     * 参数1 url
     * 参数2 回调Callback
     */
    public static void uploadPic(String url, File file, String fileName) {
        //创建OkHttpClient请求对象
        OkHttpClient okHttpClient = getOkHttpClient();
        //创建RequestBody 封装file参数
        RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file);
        //创建RequestBody 设置类型等
        RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM).addFormDataPart("file", fileName, fileBody).build();
        //创建Request
        Request request = new Request.Builder().url(url).post(requestBody).build();

        //得到Call
        Call call = okHttpClient.newCall(request);
        //执行请求
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                //上传成功回调目前不需要处理
            }
        });

    }

    /**
     * Post请求发送JSON数据
     * 参数一：请求Url
     * 参数二：请求的JSON
     * 参数三：请求回调
     */
    public static void doPostJson(String url, String jsonParams, Callback callback) {
        RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonParams);
        Request request = new Request.Builder().url(url).post(requestBody).build();
        Call call = getOkHttpClient().newCall(request);
        call.enqueue(callback);

    }

    /**
     * 下载文件以流的形式把apk写入的指定文件得到file后进行安装
     * 参数一：请求Url
     * 参数二：保存文件的路径名
     * 参数三：保存文件的文件名
     */
    public static void download(final MainActivity context, final String url, final String saveDir) {
        Request request = new Request.Builder().url(url).build();
        Call call = getOkHttpClient().newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.i("xxx", e.toString());
            }

            @Override
            public void onResponse(Call call, final Response response) throws IOException {

                InputStream is = null;
                byte[] buf = new byte[2048];
                int len = 0;
                FileOutputStream fos = null;
                try {
                    is = response.body().byteStream();
                    //apk保存路径
                    final String fileDir = isExistDir(saveDir);
                    //文件
                    File file = new File(fileDir, getNameFromUrl(url));
                    fos = new FileOutputStream(file);
                    while ((len = is.read(buf)) != -1) {
                        fos.write(buf, 0, len);
                    }
                    fos.flush();
                    //apk下载完成后调用系统的安装方法
                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
                    context.startActivity(intent);
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if (is != null) is.close();
                    if (fos != null) fos.close();

                }
            }
        });

    }

    /**
     * @param saveDir
     * @return
     * @throws IOException 判断下载目录是否存在
     */
    public static String isExistDir(String saveDir) throws IOException {
        // 下载位置
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

            File downloadFile = new File(Environment.getExternalStorageDirectory(), saveDir);
            if (!downloadFile.mkdirs()) {
                downloadFile.createNewFile();
            }
            String savePath = downloadFile.getAbsolutePath();
            Log.e("savePath", savePath);
            return savePath;
        }
        return null;
    }

    /**
     * @param url
     * @return 从下载连接中解析出文件名
     */
    private static String getNameFromUrl(String url) {
        return url.substring(url.lastIndexOf("/") + 1);
    }

    /**
     * 为okhttp添加缓存，这里是考虑到服务器不支持缓存时，从而让okhttp支持缓存
     */
    private static class CacheInterceptor implements Interceptor {
        @Override
        public Response intercept(Chain chain) throws IOException {
            // 有网络时设置缓存超时时间1个小时
            int maxAge = 60 * 60;
            // 无网络时，设置超时为1天
            int maxStale = 60 * 60 * 24;
            Request request = chain.request();
            if (NetWorkUtils.isNetWorkAvailable(MyApp.getInstance())) {
                //有网络时只从网络获取
                request = request.newBuilder().cacheControl(CacheControl.FORCE_NETWORK).build();
            } else {
                //无网络时只从缓存中读取
                request = request.newBuilder().cacheControl(CacheControl.FORCE_CACHE).build();
               /* Looper.prepare();
                Toast.makeText(MyApp.getInstance(), "走拦截器缓存", Toast.LENGTH_SHORT).show();
                Looper.loop();*/
            }
            Response response = chain.proceed(request);
            if (NetWorkUtils.isNetWorkAvailable(MyApp.getInstance())) {
                response = response.newBuilder()
                        .removeHeader("Pragma")
                        .header("Cache-Control", "public, max-age=" + maxAge)
                        .build();
            } else {
                response = response.newBuilder()
                        .removeHeader("Pragma")
                        .header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
                        .build();
            }
            return response;
        }
    }
}

然后用MVP实现代码

contract包下

public class Contract {
    public interface IModel {
        void getData(Model.ICallBack iCallBack);
    }

    public interface IView {
        void setData(List<Bean.美女Bean> list);
    }

    public interface IPresenter {
        void showData();
    }
}

model包下

public class Model implements Contract.IModel{

    String url = "http://c.3g.163.com/recommend/getChanListNews?channel=T1456112189138&size=20&passport=&devId=1uuFYbybIU2oqSRGyFrjCw%3D%3D&lat=%2F%2FOm%2B%2F8ScD%2B9fX1D8bxYWg%3D%3D&lon=LY2l8sFCNzaGzqWEPPgmUw%3D%3D&version=9.0&net=wifi&ts=1464769308&sign=bOVsnQQ6gJamli6%2BfINh6fC%2Fi9ydsM5XXPKOGRto5G948ErR02zJ6%2FKXOnxX046I&encryption=1&canal=meizu_store2014_news&mac=sSduRYcChdp%2BBL1a9Xa%2F9TC0ruPUyXM4Jwce4E9oM30%3D";
    ICallBack callBack;
    @Override
    public void getData(ICallBack iCallBack) {
        callBack = iCallBack;
        OkHttp3Utils.doGet(url, new GsonObjectCallback<Bean>() {
            @Override
            public void onUi(Bean bean) {
                List<Bean.美女Bean> list = bean.美女;
                callBack.setList(list);
            }

            @Override
            public void onFailed(Call call, IOException e) {

            }
        });
    }
    public interface ICallBack{
        void setList(List<Bean.美女Bean> list);
    }
}

presenter包下

public class Presenter implements Contract.IPresenter{
    Contract.IView iView;
    Model model;

    public Presenter(Contract.IView iView) {
        this.iView = iView;
        model = new Model();
    }

    @Override
    public void showData() {
        model.getData(new Model.ICallBack() {
            @Override
            public void setList(List<Bean.美女Bean> list) {
                iView.setData(list);
            }
        });
    }
}
view包下

public class MainActivity extends AppCompatActivity implements Contract.IView{
    ListView lv;
    Presenter presenter = new Presenter(this);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv = (ListView) findViewById(R.id.lv);
        presenter.showData();
    }

    @Override
    public void setData(List<Bean.美女Bean> list) {
        MyAdapter adapter = new MyAdapter(MainActivity.this,list);
        lv.setAdapter(adapter);
    }
}

适配器

public class MyAdapter extends BaseAdapter{
    Context context;
    List<Bean.美女Bean> list = new ArrayList<>();

    public MyAdapter(Context context, List<Bean.美女Bean> list) {
        this.context = context;
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        View v = View.inflate(context, R.layout.item,null);
        TextView tv = (TextView) v.findViewById(R.id.tv);
        ImageView img = (ImageView) v.findViewById(R.id.img);
        tv.setText(list.get(i).title);
        img.setImageResource(R.mipmap.ic_launcher);
        return v;
    }
}

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