OkHttp3二次封装和拦截器

只包含Get和Post请求

Okhttp3依赖包//前两个是Okhttp3依赖compile 'com.squareup.okio:okio:1.5.0'   //不写不加载数据compile 'com.squareup.okhttp3:okhttp:3.2.0'//拦截器依赖compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'

以下为代码二次封装采用的是单例模式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() {    }    //通过单例模式获取实例    public static OkHttpClient getInstance() {        if (okHttpClient == null) {            //同步代码            synchronized (OkHttp3Utils.class) {                if (okHttpClient == null) {                    //缓存路径                    File sdcache = new File(Environment.getExternalStorageDirectory(), "okhttpCache");                    int cacheSize = 10 * 1024 * 1024;                    //okhttp拦截器                    HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {                        @Override                        public void log(String message) {                            Log.i("msg", message.toString());                        }                    });                    //拦截器日志分类                    httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);                    okHttpClient = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.MINUTES)                            .addInterceptor(httpLoggingInterceptor)                            .writeTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS)                            .cache(new Cache(sdcache.getAbsoluteFile(), cacheSize)).build();                }            }        }        return okHttpClient;    }    /**     * get请求方式     *     * @param url      请求地址     * @param callback 回调接口     */    public static void doGet(String url, Callback callback) {        //获取请求对象的实例        OkHttpClient okHttpClient = OkHttp3Utils.getInstance();        //创建Request        Request request = new Request.Builder().url(url).build();        //得到Call        Call call = okHttpClient.newCall(request);        //执行异步请求        call.enqueue(callback);    }    /**     * post请求方式     *     * @param url      请求地址     * @param params   请求体     * @param callback 接口回调     */    public static void doPost(String url, Map<String, String> params, Callback callback) {        //获取请求对象的实例        OkHttpClient okHttpClient = OkHttp3Utils.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map集合给请求体添加值        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();        //获取call        Call call = okHttpClient.newCall(request);        //异步请求        call.enqueue(callback);    }    /**     * 上传文件     *     * @param url      接口地址     * @param file     文件     * @param fileName 文件名     */    public static void loadFile(String url, File file, String fileName,Callback callback) {        //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();        Call call = okHttpClient.newCall(request);        call.enqueue(callback);    }    /**     * 上传json字符     *     * @param url        接口地址     * @param jsonParams Json串     * @param callback   接口回调     */    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     *     * @param context     * @param url     下载地址     * @param saveDir 保存的位置     */    public static void downFile(final Activity context, final String url, final String saveDir) {        //创建Request        Request request = new Request.Builder().url(url).build();        //创建Call        Call call = getInstance().newCall(request);        //同步        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);    }}

这是一个判断网络连接工具类

记得要在androidmanifest添加网络管理权限<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>话不多说直接上代码一个封装好的类public class NetWorkUtils {    //判断网络是否连接    public static boolean isNetWorkAvailable(Context context) {        //网络连接管理器        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        //网络信息        NetworkInfo info = connectivityManager.getActiveNetworkInfo();        if (info != null) {            return true;        }        return false;    }}