OkHttp封装+网络拦截器

首先我们先写一个拦截器

package com.bwey.text.util;import android.os.Build;import android.util.Log;import com.google.gson.Gson;import java.io.IOException;import java.util.logging.Logger;import okhttp3.Interceptor;import okhttp3.Request;import okhttp3.Response;/** * 网络拦截器 */public class LoggingInterceptor implements Interceptor {    private static final String UA = "User-Agent";    @Override    public Response intercept(Chain chain) throws IOException {        Request request = chain.request()                .newBuilder()                .addHeader(UA, makeUA())                .build();        return chain.proceed(request);    }    private String makeUA() {        String s = Build.BRAND + "/" + Build.MODEL + "/" + Build.VERSION.RELEASE;        return Build.BRAND + "/" + Build.MODEL + "/" + Build.VERSION.RELEASE;    }}

然后我们在OkHttp中加入添加我们的拦截器

package com.bwey.text.util;import android.os.Handler;import android.os.Looper;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.util.HashMap;import java.util.Map;import java.util.concurrent.TimeUnit;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;public class OkHttp {    /**     * 静态实例     */    private static OkHttp sOkHttpManager;    /**     * okhttpclient实例     */    private OkHttpClient mClient;    /**     * 因为我们请求数据一般都是子线程中请求，在这里我们使用了handler     */    private Handler mHandler;    /**     * 构造方法     */    private OkHttp() {        mClient = new OkHttpClient.Builder()                //添加拦截器                .addInterceptor(new LoggingInterceptor())                .build();        /**         * 在这里直接设置连接超时.读取超时，写入超时         */        mClient.newBuilder().connectTimeout(10, TimeUnit.SECONDS);        mClient.newBuilder().readTimeout(10, TimeUnit.SECONDS);        mClient.newBuilder().writeTimeout(10, TimeUnit.SECONDS);        /**         * 初始化handler         */        mHandler = new Handler(Looper.getMainLooper());    }    /**     * 单例模式  获取OkHttp实例     *     * @return     */    public static OkHttp getInstance() {        if (sOkHttpManager == null) {            sOkHttpManager = new OkHttp();        }        return sOkHttpManager;    }    //-------------------------同步的方式请求数据--------------------------    /**     * 对外提供的get方法,同步的方式     *     * @param url 传入的地址     * @return     */    public static Response getSync(String url) {        //通过获取到的实例来调用内部方法        return sOkHttpManager.inner_getSync(url);    }    /**     * GET方式请求的内部逻辑处理方式，同步的方式     *     * @param url     * @return     */    private Response inner_getSync(String url) {        Request request = new Request.Builder().url(url).build();        Response response = null;        try {            //同步请求返回的是response对象            response = mClient.newCall(request).execute();        } catch (IOException e) {            e.printStackTrace();        }        return response;    }    /**     * 对外提供的同步获取String的方法     *     * @param url     * @return     */    public static String getSyncString(String url) {        return sOkHttpManager.inner_getSyncString(url);    }    /**     * 同步方法     */    private String inner_getSyncString(String url) {        String result = null;        try {            /**             * 把取得到的结果转为字符串，这里最好用string()             */            result = inner_getSync(url).body().string();        } catch (IOException e) {            e.printStackTrace();        }        return result;    }    //-------------------------异步的方式请求数据--------------------------    public static void getAsync(String url, DataCallBack callBack) {        getInstance().inner_getAsync(url, callBack);    }    /**     * 内部逻辑请求的方法     *     * @param url     * @param callBack     * @return     */    private void inner_getAsync(String url, final DataCallBack callBack) {        final Request request = new Request.Builder().url(url).build();        mClient.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                deliverDataFailure(request, e, callBack);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                String result = null;                try {                    result = response.body().string();                } catch (IOException e) {                    deliverDataFailure(request, e, callBack);                }                deliverDataSuccess(result, callBack);            }        });    }    /**     * 分发失败的时候调用     *     * @param request     * @param e     * @param callBack     */    private void deliverDataFailure(final Request request, final IOException e, final DataCallBack callBack) {        /**         * 在这里使用异步处理         */        mHandler.post(new Runnable() {            @Override            public void run() {                if (callBack != null) {                    callBack.requestFailure(request, e);                }            }        });    }    /**     * 分发成功的时候调用     *     * @param result     * @param callBack     */    private void deliverDataSuccess(final String result, final DataCallBack callBack) {        /**         * 在这里使用异步线程处理         */        mHandler.post(new Runnable() {            @Override            public void run() {                if (callBack != null) {                    try {                        callBack.requestSuccess(result);                    } catch (Exception e) {                        e.printStackTrace();                    }                }            }        });    }    /**     * 数据回调接口     */    public interface DataCallBack {        void requestFailure(Request request, IOException e);        void requestSuccess(String result) throws Exception;    }    //-------------------------提交表单--------------------------    public static void postAsync(String url, Map<String, String> params, DataCallBack callBack) {        getInstance().inner_postAsync(url, params, callBack);    }    private void inner_postAsync(String url, Map<String, String> params, final DataCallBack callBack) {        RequestBody requestBody = null;        if (params == null) {            params = new HashMap<>();        }        /**         * 如果是3.0之前版本的，构建表单数据是下面的一句         */        //FormEncodingBuilder builder = new FormEncodingBuilder();        /**         * 3.0之后版本         */        FormBody.Builder builder = new FormBody.Builder();        /**         * 在这对添加的参数进行遍历，map遍历有四种方式，如果想要了解的可以网上查找         */        for (Map.Entry<String, String> map : params.entrySet()) {            String key = map.getKey().toString();            String value = null;            /**             * 判断值是否是空的             */            if (map.getValue() == null) {                value = "";            } else {                value = map.getValue();            }            /**             * 把key和value添加到formbody中             */            builder.add(key, value);        }        requestBody = builder.build();        //结果返回        // 请求对象        final Request request = new Request.Builder().url(url).post(requestBody).build();        mClient.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                deliverDataFailure(request, e, callBack);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                String result = response.body().string();                deliverDataSuccess(result, callBack);            }        });    }    //-------------------------文件下载--------------------------    public static void downloadAsync(String url, String desDir, DataCallBack callBack) {        getInstance().inner_downloadAsync(url, desDir, callBack);    }    /**     * 下载文件的内部逻辑处理类     *     * @param url      下载地址     * @param desDir   目标地址     * @param callBack     */    private void inner_downloadAsync(final String url, final String desDir, final DataCallBack callBack) {        final Request request = new Request.Builder().url(url).build();        mClient.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                deliverDataFailure(request, e, callBack);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                /**                 * 在这里进行文件的下载处理                 */                InputStream inputStream = null;                FileOutputStream fileOutputStream = null;                try {                    //文件名和目标地址                    File file = new File(desDir, getFileName(url));                    //把请求回来的response对象装换为字节流                    inputStream = response.body().byteStream();                    fileOutputStream = new FileOutputStream(file);                    int len = 0;                    byte[] bytes = new byte[2048];                    //循环读取数据                    while ((len = inputStream.read(bytes)) != -1) {                        fileOutputStream.write(bytes, 0, len);                    }                    //关闭文件输出流                    fileOutputStream.flush();                    //调用分发数据成功的方法                    deliverDataSuccess(file.getAbsolutePath(), callBack);                } catch (IOException e) {                    //如果失败，调用此方法                    deliverDataFailure(request, e, callBack);                    e.printStackTrace();                } finally {                    if (inputStream != null) {                        inputStream.close();                    }                    if (fileOutputStream != null) {                        fileOutputStream.close();                    }                }            }        });    }    /**     * 根据文件url获取文件的路径名字     *     * @param url     * @return     */    private String getFileName(String url) {        int separatorIndex = url.lastIndexOf("/");        String path = (separatorIndex < 0) ? url : url.substring(separatorIndex + 1, url.length());        return path;    }}

不要忘记导入OkHttp的依赖