23OKhttputils

package com.bwie.activity.utils;

import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;

import com.bwie.activity.activity.Shangping;

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 okhttp3.Cache;
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;

/**
* 1. 类的用途 封装OkHttp3的工具类 用单例设计模式
* 2. @author forever
* 3. @date 2017/9/6 09:19
*/

public class OkHttp3Utils {
/**
* 懒汉 安全 加同步
* 私有的静态成员变量 只声明不创建
* 私有的构造方法
* 提供返回实例的静态方法
*/
private static OkHttpClient okHttpClient = null;

public OkHttp3Utils() {}public static OkHttpClient getInstance() {    if (okHttpClient == null) {        //加同步安全        synchronized (OkHttp3Utils.class) {            if (okHttpClient == null) {                //判空 为空创建实例                // okHttpClient = new OkHttpClient();

/**
* 和OkHttp2.x有区别的是不能通过OkHttpClient直接设置超时时间和缓存了，而是通过OkHttpClient.Builder来设置，
* 通过builder配置好OkHttpClient后用builder.build()来返回OkHttpClient，
* 所以我们通常不会调用new OkHttpClient()来得到OkHttpClient，而是通过builder.build()：
*/
// File sdcache = getExternalCacheDir();
File sdcache = new File(Environment.getExternalStorageDirectory(), “cache”);
int cacheSize = 10 * 1024 * 1024;
okHttpClient = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS)
.writeTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS).cache(new Cache(sdcache.getAbsoluteFile(), cacheSize)).build();
}
}

    }    return okHttpClient;}/** * get请求 * 参数1 url * 参数2 回调Callback */public static void doGet(String url, Callback callback) {    //创建OkHttpClient请求对象    OkHttpClient okHttpClient = getInstance();    //创建Request    Request request = new Request.Builder().url(url).build();    //得到Call对象    Call call = okHttpClient.newCall(request);    //执行异步请求    call.enqueue(callback);}/** * post请求 * 参数1 url * 参数2 回调Callback */public static void doPost(String url, Map<String, String> params, Callback callback) {    //创建OkHttpClient请求对象    OkHttpClient okHttpClient = getInstance();    //3.x版本post请求换成FormBody 封装键值对参数    FormBody.Builder builder = new FormBody.Builder();    //遍历集合    for (String key : params.keySet()) {        builder.add(key, params.get(key));    }    //创建Request    Request request = new Request.Builder().url(url).post(builder.build()).build();    Call call = okHttpClient.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(String url, File file, String fileName) {    //创建OkHttpClient请求对象    OkHttpClient okHttpClient = getInstance();    //创建RequestBody 封装file参数    RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file);    //创建RequestBody 设置类型等    RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM).addFormDataPart("file", fileName, fileBody).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        }    });}/** * Post请求发送JSON数据 * 参数一：请求Url * 参数二：请求的JSON * 参数三：请求回调 */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 = getInstance().newCall(request);    call.enqueue(callback);}/** * 下载文件 以流的形式把apk写入的指定文件 得到file后进行安装 * 参数一：请求Url * 参数二：保存文件的路径名 * 参数三：保存文件的文件名 */public static void download(final Shangping context, final String url, final String saveDir) {    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) {            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保存路径                final String fileDir = isExistDir(saveDir);                //文件                File file = new File(fileDir, getNameFromUrl(url));                context.runOnUiThread(new Runnable() {                    @Override                    public void run() {                        Toast.makeText(context, "下载成功:" + fileDir + "," + getNameFromUrl(url), Toast.LENGTH_SHORT).show();                    }                });                fos = new FileOutputStream(file);                while ((len = is.read(buf)) != -1) {                    fos.write(buf, 0, len);                }                fos.flush();                //apk下载完成后 调用系统的安装方法                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();            }        }    });}/** * @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);}

}