OkHttp二次封裝

package utils;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import app.MyApp;
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 OkHttp3Utils {
 
    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 爲空創建實例
            // okHttpClient = new OkHttpClient();

            //  File sdcache = getExternalCacheDir();
            //緩存目錄
            File sdcache = new File(Environment.getExternalStorageDirectory(), "cache");
            int cacheSize = 10 * 1024 * 1024;
            //OkHttp3攔截器
            HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
                @Override
                public void log(String message) {
                    Log.i("xxx", message.toString());
                }
            });
            //Okhttp3的攔截器日誌分類 4種
            httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

            okHttpClient = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS)
                    //添加OkHttp3的攔截器
                    .addInterceptor(httpLoggingInterceptor)
                    .addNetworkInterceptor(new CacheInterceptor())
                    .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;
    }

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

        //創建OkHttpClient請求對象
        OkHttpClient okHttpClient = getOkHttpClient();
        //創建Request
        Request request = new Request.Builder().url(url).build();
        //得到Call對象
        Call call = okHttpClient.newCall(request);
        //執行異步請求
        call.enqueue(callback);

    }

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

        //創建OkHttpClient請求對象
        OkHttpClient okHttpClient = getOkHttpClient();
        //3.x版本post請求換成FormBody 封裝鍵值對參數

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

        }

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

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

    }

    public static void uploadPic(String url, File file, String fileName) {

        OkHttpClient okHttpClient = getOkHttpClient();

        RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file);

        RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM).addFormDataPart("file", fileName, fileBody).build();

        Request request = new Request.Builder().url(url).post(requestBody).build();

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

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                //上傳成功回調 目前不需要處理
            }
        });

    }

    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);

    }

    public static void download(final Context 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保存路徑
                    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下載完成後 調用系統的安裝方法
                    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();

                }
            }
        });

    }

    public static String isExistDir(String saveDir) throws IOException {
        // 下載位置
        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;
    }

    private static String getNameFromUrl(String url) {
        return url.substring(url.lastIndexOf("/") + 1);
    }

    private static class CacheInterceptor implements Interceptor {
        @Override
        public Response intercept(Chain chain) throws IOException {
        
            int maxAge = 60 * 60;

            int maxStale = 60 * 60 * 24;
            Request request = chain.request();
            if (NetWorkUtils.isNetWorkAvailable(MyApp.getInstance())) {
       
                request = request.newBuilder().cacheControl(CacheControl.FORCE_NETWORK).build();
            } else {

                request = request.newBuilder().cacheControl(CacheControl.FORCE_CACHE).build();
               /* Looper.prepare();
                Toast.makeText(MyApp.getInstance(), "走攔截器緩存", 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;
        }
    }
    public interface OnGetServerDateLisnter {
        void getData(String string);
    }
}