OKHttp封装（带泛型）网络判断

来源：互联网发布：python基础教程第2版编辑：程序博客网时间：2024/05/17 07:33

//先导入依赖

compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'

compile 'com.android.support:recyclerview-v7:25.3.1'

compile 'com.google.code.gson:gson:2.8.2'

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

import android.content.Context;
import android.os.Environment;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.net.FileNameMap;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Cache;
import okhttp3.CacheControl;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;

public class HttpUtils {

    private static OkHttpClient client = null;

    private HttpUtils() {}

    public static OkHttpClient getInstance() {
        if (client == null) {
            synchronized (HttpUtils.class) {
                if (client == null){
                   //缓存目录
                    File sdcache = new File(Environment.getExternalStorageDirectory(), "okCache");
                    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
                    httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

                    client = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS)
                            //添加OkHttp3的拦截器
                            .addInterceptor(httpLoggingInterceptor)
                            .addNetworkInterceptor(new CacheInterceptor())
                            .writeTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS)
                            .cache(new Cache(sdcache.getAbsoluteFile(), cacheSize))
                            .build();
               }

            }
        }
        return client;
    }

    private static Handler mHandler = null;

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

        return mHandler;
    }

    /**
     * Get请求
     *
     * @param url
     * @param callback
     */
    public static void doGet(String url, Callback callback) {
        Request request = new Request.Builder()
                .url(url)
                .build();
        Call call = getInstance().newCall(request);
        call.enqueue(callback);
    }

    /**
     * Post请求发送键值对数据
     *
     * @param url
     * @param mapParams
     * @param callback
     */
    public static void doPost(String url, Map<String, String> mapParams, Callback callback) {
        FormBody.Builder builder = new FormBody.Builder();
        for (String key : mapParams.keySet()) {
            builder.add(key, mapParams.get(key));
        }
        Request request = new Request.Builder()
                .url(url)
                .post(builder.build())
                .build();
        Call call = getInstance().newCall(request);
        call.enqueue(callback);
    }

    /**
     * Post请求发送JSON数据
     *
     * @param url
     * @param jsonParams
     * @param callback
     */
    public static void doPost(String url, String jsonParams, Callback callback) {
        RequestBody body = RequestBody.create(MediaType.parse("application/json; charset=utf-8")
                , jsonParams);
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        Call call = getInstance().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(final Context context, String url, Map<String, Object> params) {
        //创建OkHttpClient请求对象
        OkHttpClient okHttpClient = getInstance();
        //创建MultipartBody.Builder 设置支持FORM
        MultipartBody.Builder builder = new MultipartBody.Builder().setType(MultipartBody.FORM);
        for (Map.Entry<String, Object> entry : params.entrySet()) {
            Object value = entry.getValue();
            if (value instanceof File) {
                File file = (File) value;

                //创建RequestBody 封装file参数
                builder.addFormDataPart(entry.getKey(), file.getName(), RequestBody.create(MediaType.parse("application/octet-stream"), file));

            } else {
                builder.addFormDataPart(entry.getKey(), value.toString());
            }
        }

        //创建RequestBody 设置类型等
        RequestBody requestBody = builder.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
                Looper.prepare();
                Toast.makeText(context, "上传成功", Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        });

    }

    /*   OkHttpClient client = new OkHttpClient();
        // form 表单形式上传
        MultipartBody.Builder requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM);
        if(file != null){
            // MediaType.parse() 里面是上传的文件类型。
            RequestBody body = RequestBody.create(MediaType.parse("image*//**//*"), file);
            String filename = file.getName();
            // 参数分别为，请求key ，文件名称， RequestBody
            requestBody.addFormDataPart("file", filename, body).addFormDataPart("uid", String.valueOf(uid));
        }

        Request request = new Request.Builder().url(API.UpImg).post(requestBody.build()).build();
        Log.e("asd",request.toString());
        // readTimeout("请求超时时间" , 时间单位);
        client.newBuilder().readTimeout(5000, TimeUnit.MILLISECONDS).build().newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Message message = new Message();
                message.what = 2;
                message.obj = response.body().string();
                handler.sendMessage(message);
            }
        });*/
        /*Map<String, Object> params = new HashMap<>();
        params.put("uid", uid);
        params.put("file", file);
        if (file.exists()) {
            HttpUtils.uploadPic(null, API.UpImg, params);
        }*/

    /**
     * 根据文件路径判断MediaType
     *
     * @param path
     * @return
     */
    private static String judgeType(String path) {
        FileNameMap fileNameMap = URLConnection.getFileNameMap();
        String contentTypeFor = fileNameMap.getContentTypeFor(path);
        if (contentTypeFor == null) {
            contentTypeFor = "application/octet-stream";
        }
        return contentTypeFor;
    }

    /**
     * 下载文件
     * @param url
     * @param fileDir
     * @param fileName
     */
    public static void downFile(String url, final String fileDir, final String fileName) {
        Request request = new Request.Builder()
                .url(url)
                .build();
        Call call = getInstance().newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                InputStream is = null;
                byte[] buf = new byte[2048];
                int len = 0;
                FileOutputStream fos = null;
                try {
                    is = response.body().byteStream();
                    File file = new File(fileDir, fileName);
                    fos = new FileOutputStream(file);
                    while ((len = is.read(buf)) != -1) {
                        fos.write(buf, 0, len);
                    }
                    fos.flush();
                } 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();

                request = request.newBuilder().cacheControl(CacheControl.FORCE_NETWORK).build();

            Response response = chain.proceed(request);

                response = response.newBuilder()
                        .removeHeader("Pragma")
                        .header("Cache-Control", "public, max-age=" + maxAge)
                        .build();

            return response;
        }
    }

    // 数据最外层为大括号（类）使用的callback
    public abstract static class GsonObjectCallback<T> implements Callback {
        private Handler handler = 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 {
            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);
                }
            });
        }
    }

    // 数据最外层为中括号（数组）使用的callback
    public abstract static class GsonArrayCallback<T> implements Callback {
        private Handler handler = 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);

                }
            });

        }
    }

}

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