封装OkHttp3

当前功能：

• 同步get方法
• 异步get方法
• 同步post方法（Map参数）
• 异步post方法（Map参数）
• 同步post方法（Json参数）
• 异步post方法（Json参数）
• 同步post方法（多文件上传）
• 异步post方法（多文件上传）
• 异步文件下载（支持进度回调）

持续更新中 · · ·

代码如下

import android.webkit.MimeTypeMap;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.SocketTimeoutException;import java.util.List;import java.util.Map;import java.util.concurrent.TimeUnit;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.MediaType;import okhttp3.MultipartBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;/** * Created by QingJiao on 2017/12/21. * 当日OkHttp版本：3.9.1 */public class OkHttpHelper {    private static final String POST_FILE_KEY = "fileList"; //请求参数中文件的key    private static final int MAX_LOAD_TIMES = 5; //下载超时重连次数限制    private static OkHttpClient client = null;    /**     * 私有构造方法     */    private OkHttpHelper() {    }    /**     * 懒汉式 OkHttpClient     */    private static OkHttpClient getClient() {        if (client == null) {            synchronized (OkHttpHelper.class) {                if (client == null)                    client = new OkHttpClient.Builder()                            .connectTimeout(10, TimeUnit.SECONDS)                            .writeTimeout(30, TimeUnit.SECONDS)                            .readTimeout(30, TimeUnit.SECONDS)                            .build();            }        }        return client;    }    /**     * 异步回调接口     */    public interface OnCallListener {        void onSuccess(String result);        void onError(Exception e);    }    /**     * 同步 get     */    public static String get(String url) throws IOException {        Request request = new Request.Builder()                .url(url)                .build();        Call call = getClient().newCall(request);        Response response = call.execute();        return response.body().string();    }    /**     * 异步 get     */    public static void get(String url, final OnCallListener listener) {        Request request = new Request.Builder()                .url(url)                .build();        Call call = getClient().newCall(request);        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                listener.onError(e);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                listener.onSuccess(response.body().string());            }        });    }    /**     * 同步 post [map 形式]     */    public static String post(String url, Map<String, String> params) throws IOException {        FormBody.Builder builder = new FormBody.Builder();        for (Map.Entry<String, String> entry : params.entrySet()) {            builder.add(entry.getKey(), entry.getValue());        }        Request request = new Request.Builder()                .url(url)                .post(builder.build())                .build();        Call call = getClient().newCall(request);        Response response = call.execute();        return response.body().string();    }    /**     * 异步 post [map 形式]     */    public static void post(String url, Map<String, String> params, final OnCallListener listener) {        FormBody.Builder builder = new FormBody.Builder();        for (Map.Entry<String, String> entry : params.entrySet()) {            builder.add(entry.getKey(), entry.getValue());        }        Request request = new Request.Builder()                .url(url)                .post(builder.build())                .build();        Call call = getClient().newCall(request);        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                listener.onError(e);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                listener.onSuccess(response.body().string());            }        });    }    /**     * 同步 post [json 形式]     */    public static String post(String url, String json) throws IOException {        Request request = new Request.Builder()                .url(url)                .post(RequestBody.create(MediaType.parse("application/json; charset=utf-8"), json))                .build();        Call call = getClient().newCall(request);        Response response = call.execute();        return response.body().string();    }    /**     * 异步 post [json 形式]     */    public static void post(String url, String json, final OnCallListener listener) {        Request request = new Request.Builder()                .url(url)                .post(RequestBody.create(MediaType.parse("application/json; charset=utf-8"), json))                .build();        Call call = getClient().newCall(request);        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                listener.onError(e);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                listener.onSuccess(response.body().string());            }        });    }    /**     * 同步 post [多文件上传]     */    public static String postFiles(String url, Map<String, String> params, List<File> fileList) throws IOException {        MultipartBody.Builder builder = new MultipartBody.Builder().setType(MultipartBody.FORM);        if (params != null) {            for (String key : params.keySet()) {                builder.addFormDataPart(key, params.get(key));            }        }        if (fileList != null && fileList.size() > 0) {            for (File file : fileList) {                RequestBody requestBody = RequestBody.create(MediaType.parse(getMimeType(file)), file);                builder.addFormDataPart(POST_FILE_KEY, file.getName(), requestBody);            }        }        Request request = new Request.Builder()                .url(url)                .post(builder.build())                .build();        Call call = getClient().newCall(request);        Response response = call.execute();        return response.body().string();    }    /**     * 异步 post [多文件上传]     */    public static void postFiles(String url, Map<String, String> params, List<File> fileList, final OnCallListener listener) {        MultipartBody.Builder builder = new MultipartBody.Builder().setType(MultipartBody.FORM);        if (params != null) {            for (String key : params.keySet()) {                builder.addFormDataPart(key, params.get(key));            }        }        if (fileList != null && fileList.size() > 0) {            for (File file : fileList) {                RequestBody requestBody = RequestBody.create(MediaType.parse(getMimeType(file)), file);                builder.addFormDataPart(POST_FILE_KEY, file.getName(), requestBody);            }        }        Request request = new Request.Builder()                .url(url)                .post(builder.build())                .build();        Call call = getClient().newCall(request);        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                listener.onError(e);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                listener.onSuccess(response.body().string());            }        });    }    /**     * 下载回调接口     */    public interface OnDownloadListener {        void onSuccess(String result);        void onError(Exception e);        void onLoading(int progress);    }    /**     * 下载文件     */    public static void downloadFile(String fileUrl, final String pathName, final OnDownloadListener listener) {        Request request = new Request.Builder()                .url(fileUrl)                .build();        Call call = getClient().newCall(request);        call.enqueue(new Callback() {            int loadTimes = 0; //重新连接次数            @Override            public void onFailure(Call call, IOException e) {                //超时重新连接                if (e.getCause().equals(SocketTimeoutException.class) && loadTimes < MAX_LOAD_TIMES) {                    loadTimes++;                    getClient().newCall(call.request()).enqueue(this);                } else {                    listener.onError(e);                }            }            @Override            public void onResponse(Call call, Response response) throws IOException {                InputStream inputStream = response.body().byteStream();                long contentLength = response.body().contentLength();                FileOutputStream fileOutputStream = null;                try {                    fileOutputStream = new FileOutputStream(new File(pathName));                    byte[] buffer = new byte[2048];                    int len, sum = 0;                    while ((len = inputStream.read(buffer)) != -1) {                        fileOutputStream.write(buffer, 0, len);                        sum += len;                        int progress = (int) (sum * 1.0f / contentLength * 100);                        listener.onLoading(progress);                    }                    fileOutputStream.flush();                    listener.onSuccess(response.body().string());                } catch (IOException e) {                    listener.onError(e);                } finally {                    try {                        if (inputStream != null)                            inputStream.close();                        if (fileOutputStream != null)                            fileOutputStream.close();                    } catch (Exception e) {                        listener.onError(e);                    }                }            }        });    }    /**     * 工具方法：通过文件获取文件类型     */    private static String getMimeType(final File file) {        String extension = getExtension(file);        return MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);    }    /**     * 工具方法：通过文件获取文件后缀     */    private static String getExtension(final File file) {        String extension = "";        String name = file.getName();        final int idx = name.lastIndexOf(".");        if (idx > 0) {            extension = name.substring(idx + 1);        }        return extension;    }}

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