進行post請求

OkHttpClient client = new OkHttpClient();
// form 表單形式上傳
MultipartBody.Builder requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM);
if(file != null){
    // MediaType.parse() 裡面是上傳的檔案型別。
RequestBody body = RequestBody.create(MediaType.parse("image/*"), file);
    String filename = file
 
.getName();
    // 引數分別為， 請求key ，檔名稱 ， RequestBody
requestBody.addFormDataPart("file", filename, body).addFormDataPart("uid", String.valueOf(uid));
}

Request request = new Request.Builder().url(API.UpImg).post(requestBody.build()).build();
// readTimeout("請求超時時間" , 時間單位);
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 {
        String string = response.body().string();
        Message message = new 
 
Message();
        message.what = 0;
        message.obj = string;
        handler.sendMessage(message);
    }
});