okhttp用法

1.get：

注意回调不是在主线程执行的，所有操作ui要runonuithread

protected void okHttpGet() {    Request.Builder builder = new Request.            Builder()            .url("http://apis.juhe.cn/cook/query?key=4ecde5ed955fadaf85d96529cd98beb4&menu=%E8%A5%BF%E7%BA%A2%E6%9F%BF");    builder.method("GET", null);    Request request = builder.build();    client.newCall(request).enqueue(new Callback() {        @Override        public void onFailure(Call call, IOException e) {        }        @Override        public void onResponse(Call call, Response response) throws IOException {            String str = response.body().string();            Log.d("qf", str);            runOnUiThread(new Runnable() {                @Override                public void run() {                    Toast.makeText(MainActivity.this, "ok", Toast.LENGTH_SHORT).show();                }            });        }    });}

2.post

protected void okHttpPost() {    Request.Builder builder = new Request            .Builder()            .url("http://apis.juhe.cn/cook/query");    RequestBody body = new FormBody            .Builder()            .add("key", "4ecde5ed955fadaf85d96529cd98beb4")            .add("menu", "西红柿")            .build();    builder.post(body);    Request request = builder.build();    client.newCall(request).enqueue(new Callback() {        @Override        public void onFailure(Call call, IOException e) {        }        @Override        public void onResponse(Call call, Response response) throws IOException {            String str = response.body().string();            Log.i("zy", str);        }    });}

3.json请求：

public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");

protected void okHttpPostJson() {    String url = "http://192.168.1.103/test/rest/rest.php/items";    String data = "{\"name\":\"Brett3\",\"link\":\"haha2\"}";    Request.Builder builder = new Request.Builder().url(url);    RequestBody body = RequestBody.create(JSON, data);    //builder.post(body);    builder.method("POST", body);    Request request = builder.build();    client.newCall(request).enqueue(new Callback() {        @Override        public void onFailure(Call call, IOException e) {        }        @Override        public void onResponse(Call call, Response response) throws IOException {            String str = response.body().string();            Log.i("zy", str);        }    });}

4.下载：

protected void okHttpDownLoad() {    String url = "http://img.my.csdn.net/uploads/201603/26/1458988468_5804.jpg";    Request request = new Request.Builder().url(url).build();    client.newCall(request).enqueue(new Callback() {        @Override        public void onFailure(Call call, IOException e) {        }        @Override        public void onResponse(Call call, Response response) {            InputStream inputStream = response.body().byteStream();            FileOutputStream fileOutputStream = null;            try {                fileOutputStream = new FileOutputStream(new File("/sdcard/wangshu.jpg"));                byte[] buffer = new byte[2048];                int len = 0;                while ((len = inputStream.read(buffer)) != -1) {                    fileOutputStream.write(buffer, 0, len);                }                fileOutputStream.flush();            } catch (IOException e) {                Log.i("wangshu", "IOException");                e.printStackTrace();            }            Log.d("wangshu", "文件下载成功");        }    });}

5.上传单文件：

上传服务器为github，生成markdown文件，上传一个文件，github这个服务可以对文件中内容按照一定语法进行处理

public static final MediaType MEDIA_TYPE_MARKDOWN        = MediaType.parse("text/x-markdown; charset=utf-8");

protected void okHttpUpdateFile() {    File file = new File("/sdcard/DownLoad/bb.txt");    Request request = new Request.Builder()            .url("https://api.github.com/markdown/raw")            .post(RequestBody.create(MEDIA_TYPE_MARKDOWN, file))            .build();    client.newCall(request).enqueue(new Callback() {        @Override        public void onFailure(Call call, IOException e) {        }        @Override        public void onResponse(Call call, Response response) throws IOException {            String str = response.body().string();            Log.i("zy", str);        }    });}

6.多文件（或多种数据类型）同时上传：

private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");

private void sendMultipart() {    RequestBody requestBody = new MultipartBody.Builder()            .setType(MultipartBody.FORM)            .addFormDataPart("title", "wangshu")            .addFormDataPart("upload_file0"                    , "wangshu.jpg"                    , RequestBody.create(MEDIA_TYPE_PNG, new File("/sdcard/wangshu.jpg")))            .build();    Request request = new Request.Builder()            .url("http://192.168.1.107/upload.php")            .post(requestBody)            .build();    client.newCall(request).enqueue(new Callback() {        @Override        public void onFailure(Call call, IOException e) {        }        @Override        public void onResponse(Call call, Response response) throws IOException {            Log.i("wangshu", response.body().string());        }    });}

7.okhttpclient的初始化设置：

protected void initOkHttpClient() {    //client = new OkHttpClient();    File sdcache = getExternalCacheDir();    int cacheSize = 10 * 1024 * 1024;    OkHttpClient.Builder builder = new OkHttpClient.Builder();    builder.connectTimeout(10, TimeUnit.SECONDS)            .readTimeout(5, TimeUnit.SECONDS)            .writeTimeout(5, TimeUnit.SECONDS);    builder.cache(new Cache(sdcache, cacheSize));    client = builder.build();}

8.同步执行：

protected void syncExcute(){    Request.Builder builder = new Request.            Builder()            .url("http://apis.juhe.cn/cook/query?key=4ecde5ed955fadaf85d96529cd98beb4&menu=%E8%A5%BF%E7%BA%A2%E6%9F%BF");    builder.method("GET", null);    Request request = builder.build();    try {        Response response = client.newCall(request).execute();        String str = response.body().string();        Log.d("qf",str);    } catch (IOException e) {        e.printStackTrace();    }}

new Thread(){    @Override    public void run() {        syncExcute();    }}.start();