音乐APP网络请求组件开发

havenobug
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封装思路

在这里插入图片描述

封装okhttp

请求参数的封装：

public class RequestParams {

    public ConcurrentHashMap<String, String> urlParams = new ConcurrentHashMap<String, String>();
    public ConcurrentHashMap<String, Object> fileParams = new ConcurrentHashMap<String, Object>();

    /**
     * Constructs a new empty {@code RequestParams} instance.
     */
    public RequestParams() {
        this((Map<String, String>) null);
    }

    /**
     * Constructs a new RequestParams instance containing the key/value string
     * params from the specified map.
     *
     * @param source the source key/value string map to add.
     */
    public RequestParams(Map<String, String> source) {
        if (source != null) {
            for (Map.Entry<String, String> entry : source.entrySet()) {
                put(entry.getKey(), entry.getValue());
            }
        }
    }

    /**
     * Constructs a new RequestParams instance and populate it with a single
     * initial key/value string param.
     *
     * @param key   the key name for the intial param.
     * @param value the value string for the initial param.
     */
    public RequestParams(final String key, final String value) {
        this(new HashMap<String, String>() {
            {
                put(key, value);
            }
        });
    }

    /**
     * Adds a key/value string pair to the request.
     *
     * @param key   the key name for the new param.
     * @param value the value string for the new param.
     */
    public void put(String key, String value) {
        if (key != null && value != null) {
            urlParams.put(key, value);
        }
    }

    public void put(String key, Object object) throws FileNotFoundException {

        if (key != null) {
            fileParams.put(key, object);
        }
    }

    public boolean hasParams() {
        if(urlParams.size() > 0 || fileParams.size() > 0){

            return true;
        }
        return false;
    }
}

对okhttp的request的封装：

public class  CommonRequest {
    /**
     * create the key-value Request
     *
     * @param url
     * @param params
     * @return
     */
    public static Request createPostRequest(String url, RequestParams params) {
        return createPostRequest(url, params, null);
    }

    /**
     * 可以带请求头的Post请求
     *
     * @param url
     * @param params
     * @param headers
     * @return
     */
    public static Request createPostRequest(String url, RequestParams params, RequestParams headers) {
        FormBody.Builder mFormBodyBuild = new FormBody.Builder();
        if (params != null) {
            for (Map.Entry<String, String> entry : params.urlParams.entrySet()) {
                mFormBodyBuild.add(entry.getKey(), entry.getValue());
            }
        }
        //添加请求头
        Headers.Builder mHeaderBuild = new Headers.Builder();
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.urlParams.entrySet()) {
                mHeaderBuild.add(entry.getKey(), entry.getValue());
            }
        }
        FormBody mFormBody = mFormBodyBuild.build();
        Headers mHeader = mHeaderBuild.build();
        Request request = new Request.Builder().url(url).
                post(mFormBody).
                headers(mHeader)
                .build();
        return request;
    }

    /**
     * ressemble the params to the url
     *
     * @param url
     * @param params
     * @return
     */
    public static Request createGetRequest(String url, RequestParams params) {

        return createGetRequest(url, params, null);
    }

    /**
     * 可以带请求头的Get请求
     *
     * @param url
     * @param params
     * @param headers
     * @return
     */
    public static Request createGetRequest(String url, RequestParams params, RequestParams headers) {
        StringBuilder urlBuilder = new StringBuilder(url).append("?");
        if (params != null) {
            for (Map.Entry<String, String> entry : params.urlParams.entrySet()) {
                urlBuilder.append(entry.getKey()).append("=").append(entry.getValue()).append("&");
            }
        }
        //添加请求头
        Headers.Builder mHeaderBuild = new Headers.Builder();
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.urlParams.entrySet()) {
                mHeaderBuild.add(entry.getKey(), entry.getValue());
            }
        }
        Headers mHeader = mHeaderBuild.build();
        return new Request.Builder().
                url(urlBuilder.substring(0, urlBuilder.length() - 1))
                .get()
                .headers(mHeader)
                .build();
    }

    /**
     * 文件上传请求
     *
     * @return
     */
    private static final MediaType FILE_TYPE = MediaType.parse("application/octet-stream");

    public static Request createMultiPostRequest(String url, RequestParams params) {
        MultipartBody.Builder requestBody = new MultipartBody.Builder();
        requestBody.setType(MultipartBody.FORM);
        if (params != null) {
            for (Map.Entry<String, Object> entry : params.fileParams.entrySet()) {
                if (entry.getValue() instanceof File) {
                    requestBody.addPart(Headers.of("Content-Disposition", "form-data; name=\"" + entry.getKey() + "\""),
                            RequestBody.create(FILE_TYPE, (File) entry.getValue()));
                } else if (entry.getValue() instanceof String) {

                    requestBody.addPart(Headers.of("Content-Disposition", "form-data; name=\"" + entry.getKey() + "\""),
                            RequestBody.create(null, (String) entry.getValue()));
                }
            }
        }
        return new Request.Builder().url(url).post(requestBody.build()).build();
    }
}

对JsonCallback 的封装：

 * @function 专门处理JSON的回调
 */
public class CommonJsonCallback implements Callback {

    /**
     * the logic layer exception, may alter in different app
     */
    protected final String RESULT_CODE = "ecode"; // 有返回则对于http请求来说是成功的，但还有可能是业务逻辑上的错误
    protected final int RESULT_CODE_VALUE = 0;
    protected final String ERROR_MSG = "emsg";
    protected final String EMPTY_MSG = "";

    /**
     * the java layer exception, do not same to the logic error
     */
    protected final int NETWORK_ERROR = -1; // the network relative error
    protected final int JSON_ERROR = -2; // the JSON relative error
    protected final int OTHER_ERROR = -3; // the unknow error

    /**
     * 将其它线程的数据转发到UI线程
     */
    private Handler mDeliveryHandler;
    private DisposeDataListener mListener;
    private Class<?> mClass;

    public CommonJsonCallback(DisposeDataHandle handle) {
        this.mListener = handle.mListener;
        this.mClass = handle.mClass;
        this.mDeliveryHandler = new Handler(Looper.getMainLooper());
    }

    @Override
    public void onFailure(final Call call, final IOException ioexception) {
        /**
         * 此时还在非UI线程，因此要转发
         */
        mDeliveryHandler.post(new Runnable() {
            @Override
            public void run() {
                mListener.onFailure(new OkHttpException(NETWORK_ERROR, ioexception));
            }
        });
    }

    @Override
    public void onResponse(final Call call, final Response response) throws IOException {
        final String result = response.body().string();
        mDeliveryHandler.post(new Runnable() {
            @Override
            public void run() {
                handleResponse(result);
            }
        });
    }

    private void handleResponse(Object responseObj) {
        if (responseObj == null || responseObj.toString().trim().equals("")) {
            mListener.onFailure(new OkHttpException(NETWORK_ERROR, EMPTY_MSG));
            return;
        }

        try {
            /**
             * 协议确定后看这里如何修改
             */
            JSONObject result = new JSONObject(responseObj.toString());
            if (mClass == null) {
                mListener.onSuccess(result);
            } else {
                Object obj = new Gson().fromJson(responseObj.toString(), mClass);
                if (obj != null) {
                    mListener.onSuccess(obj);
                } else {
                    mListener.onFailure(new OkHttpException(JSON_ERROR, EMPTY_MSG));
                }
            }
        } catch (Exception e) {
            mListener.onFailure(new OkHttpException(OTHER_ERROR, e.getMessage()));
            e.printStackTrace();
        }
    }
}

业务逻辑层真正处理的地方，包括java层异常和业务层异常：

public interface DisposeDataListener {

    /**
     * 请求成功回调事件处理
     */
    void onSuccess(Object responseObj);

    /**
     * 请求失败回调事件处理
     */
    void onFailure(Object reasonObj);

}

public class DisposeDataHandle
{
	public DisposeDataListener mListener = null;
	public Class<?> mClass = null;
	public String mSource = null;

	public DisposeDataHandle(DisposeDataListener listener)
	{
		this.mListener = listener;
	}

	public DisposeDataHandle(DisposeDataListener listener, Class<?> clazz)
	{
		this.mListener = listener;
		this.mClass = clazz;
	}

	public DisposeDataHandle(DisposeDataListener listener, String source)
	{
		this.mListener = listener;
		this.mSource = source;
	}
}

自定义异常类,返回ecode,emsg到业务层：

public class OkHttpException extends Exception {
    private static final long serialVersionUID = 1L;

    /**
     * the server return code
     */
    private int ecode;

    /**
     * the server return error message
     */
    private Object emsg;

    public OkHttpException(int ecode, Object emsg) {
        this.ecode = ecode;
        this.emsg = emsg;
    }

    public int getEcode() {
        return ecode;
    }

    public Object getEmsg() {
        return emsg;
    }
}

专门处理文件下载回调:

public class CommonFileCallback implements Callback {
    /**
     * the java layer exception, do not same to the logic error
     */
    protected final int NETWORK_ERROR = -1; // the network relative error
    protected final int IO_ERROR = -2; // the JSON relative error
    protected final String EMPTY_MSG = "";
    /**
     * 将其它线程的数据转发到UI线程
     */
    private static final int PROGRESS_MESSAGE = 0x01;
    private Handler mDeliveryHandler;
    private DisposeDownloadListener mListener;
    private String mFilePath;
    private int mProgress;

    public CommonFileCallback(DisposeDataHandle handle) {
        this.mListener = (DisposeDownloadListener) handle.mListener;
        this.mFilePath = handle.mSource;
        this.mDeliveryHandler = new Handler(Looper.getMainLooper()) {
            @Override
            public void handleMessage(Message msg) {
                switch (msg.what) {
                    case PROGRESS_MESSAGE:
                        mListener.onProgress((int) msg.obj);
                        break;
                }
            }
        };
    }

    @Override
    public void onFailure(final Call call, final IOException ioexception) {
        mDeliveryHandler.post(new Runnable() {
            @Override
            public void run() {
                mListener.onFailure(new OkHttpException(NETWORK_ERROR, ioexception));
            }
        });
    }

    @Override
    public void onResponse(Call call, Response response) throws IOException {
        final File file = handleResponse(response);
        mDeliveryHandler.post(new Runnable() {
            @Override
            public void run() {
                if (file != null) {
                    mListener.onSuccess(file);
                } else {
                    mListener.onFailure(new OkHttpException(IO_ERROR, EMPTY_MSG));
                }
            }
        });
    }

    /**
     * 此时还在子线程中，不则调用回调接口
     *
     * @param response
     * @return
     */
    private File handleResponse(Response response) {
        if (response == null) {
            return null;
        }

        InputStream inputStream = null;
        File file = null;
        FileOutputStream fos = null;
        byte[] buffer = new byte[2048];
        int length;
        int currentLength = 0;
        double sumLength;
        try {
            checkLocalFilePath(mFilePath);
            file = new File(mFilePath);
            fos = new FileOutputStream(file);
            inputStream = response.body().byteStream();
            sumLength = (double) response.body().contentLength();

            while ((length = inputStream.read(buffer)) != -1) {
                fos.write(buffer, 0, length);
                currentLength += length;
                mProgress = (int) (currentLength / sumLength * 100);
                mDeliveryHandler.obtainMessage(PROGRESS_MESSAGE, mProgress).sendToTarget();
            }
            fos.flush();
        } catch (Exception e) {
            file = null;
        } finally {
            try {
                if (fos != null) {
                    fos.close();
                }
                if (inputStream != null) {

                    inputStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return file;
    }

    private void checkLocalFilePath(String localFilePath) {
        File path = new File(localFilePath.substring(0,
                localFilePath.lastIndexOf("/") + 1));
        File file = new File(localFilePath);
        if (!path.exists()) {
            path.mkdirs();
        }
        if (!file.exists()) {
            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

封装OkHttpClient，用来发送get, post请求的工具类，包括设置一些请求的共用参数

public class CommonOkHttpClient {
    private static final int TIME_OUT = 30;
    private static OkHttpClient mOkHttpClient;

    static {
        OkHttpClient.Builder okHttpClientBuilder = new OkHttpClient.Builder();
        okHttpClientBuilder.hostnameVerifier(new HostnameVerifier() {
            @Override
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        });

        /**
         *  为所有请求添加请求头，看个人需求
         */
        okHttpClientBuilder.addInterceptor(new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request request =
                        chain.request().newBuilder().addHeader("User-Agent", "Imooc-Mobile") // 标明发送本次请求的客户端
                                .build();
                return chain.proceed(request);
            }
        });
        okHttpClientBuilder.cookieJar(new SimpleCookieJar());
        okHttpClientBuilder.connectTimeout(TIME_OUT, TimeUnit.SECONDS);
        okHttpClientBuilder.readTimeout(TIME_OUT, TimeUnit.SECONDS);
        okHttpClientBuilder.writeTimeout(TIME_OUT, TimeUnit.SECONDS);
        okHttpClientBuilder.followRedirects(true);
        /**
         * trust all the https point
         */
        okHttpClientBuilder.sslSocketFactory(HttpsUtils.initSSLSocketFactory(),
                HttpsUtils.initTrustManager());
        mOkHttpClient = okHttpClientBuilder.build();
    }

    public static OkHttpClient getOkHttpClient() {
        return mOkHttpClient;
    }


    /**
     * 通过构造好的Request,Callback去发送请求
     */
    public static Call get(Request request, DisposeDataHandle handle) {
        Call call = mOkHttpClient.newCall(request);
        call.enqueue(new CommonJsonCallback(handle));
        return call;
    }

    public static Call post(Request request, DisposeDataHandle handle) {
        Call call = mOkHttpClient.newCall(request);
        call.enqueue(new CommonJsonCallback(handle));
        return call;
    }

    public static Call downloadFile(Request request, DisposeDataHandle handle) {
        Call call = mOkHttpClient.newCall(request);
        call.enqueue(new CommonFileCallback(handle));
        return call;
    }
}

请求中心

public class RequestCenter {

    static class HttpConstants {
        private static final String ROOT_URL = "http://imooc.com/api";
        //private static final String ROOT_URL = "http://39.97.122.129";

        /**
         * 首页请求接口
         */
        private static String HOME_RECOMMAND = ROOT_URL + "/module_voice/home_recommand";

        private static String HOME_RECOMMAND_MORE = ROOT_URL + "/module_voice/home_recommand_more";

        private static String HOME_FRIEND = ROOT_URL + "/module_voice/home_friend";

        /**
         * 登陆接口
         */
        public static String LOGIN = ROOT_URL + "/module_voice/login_phone";
    }

    //根据参数发送所有post请求
    public static void getRequest(String url, RequestParams params, DisposeDataListener listener,
                                  Class<?> clazz) {
        CommonOkHttpClient.get(CommonRequest.
                createGetRequest(url, params), new DisposeDataHandle(listener, clazz));
    }

    public static void requestRecommandData(DisposeDataListener listener) {
        RequestCenter.getRequest(HttpConstants.HOME_RECOMMAND, null, listener,
                BaseRecommandModel.class);
    }

    public static void requestRecommandMore(DisposeDataListener listener) {
        RequestCenter.getRequest(HttpConstants.HOME_RECOMMAND_MORE, null, listener,
                BaseRecommandMoreModel.class);
    }

    public static void requestFriendData(DisposeDataListener listener) {
        RequestCenter.getRequest(HttpConstants.HOME_FRIEND, null, listener, BaseFriendModel.class);
    }

    /**
     * 用户登陆请求
     */
    public static void login(DisposeDataListener listener) {

        RequestParams params = new RequestParams();
        params.put("mb", "18734924592");
        params.put("pwd", "999999q");
        RequestCenter.getRequest(HttpConstants.LOGIN, params, listener, User.class);
    }
}
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