OKhttp上传图片

private void showChooseAlterDialog() {    AlertDialog.Builder builder = new AlertDialog.Builder(this);    builder.setTitle("设置头像");    String[] items = { "选择本地照片", "拍照" };    builder.setNegativeButton("取消", null);    builder.setItems(items, new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            switch (which) {                case CHOOSE_PICTURE: // 选择本地照片                    Intent openAlbumIntent = new Intent(                            Intent.ACTION_GET_CONTENT);                    openAlbumIntent.setType("image/*");                    startActivityForResult(openAlbumIntent, CHOOSE_PICTURE);                    break;                case TAKE_PICTURE: // 拍照                    Intent openCameraIntent = new Intent(                            MediaStore.ACTION_IMAGE_CAPTURE);                    tempUri = Uri.fromFile(new File(Environment                            .getExternalStorageDirectory(), "image.jpg"));                    // 指定照片保存路径（SD卡），image.jpg为一个临时文件，每次拍照后这个图片都会被替换                    openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempUri);                    startActivityForResult(openCameraIntent, TAKE_PICTURE);                    break;            }        }    });    builder.create().show();}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    if (resultCode == RESULT_OK) { // 如果返回码是可以用的        switch (requestCode) {            case TAKE_PICTURE:                startPhotoZoom(tempUri); // 开始对图片进行裁剪处理                break;            case CHOOSE_PICTURE:                startPhotoZoom(data.getData()); // 开始对图片进行裁剪处理                break;            case CROP_SMALL_PICTURE:                if (data != null) {                    setImageToView(data); // 让刚才选择裁剪得到的图片显示在界面上                }                break;        }    }}/** * 裁剪图片方法实现 * * @param uri */protected void startPhotoZoom(Uri uri) {    if (uri == null) {        Log.i("tag", "The uri is not exist.");    }    tempUri = uri;    Intent intent = new Intent("com.android.camera.action.CROP");    intent.setDataAndType(uri, "image/*");    // 设置裁剪    intent.putExtra("crop", "true");    // aspectX aspectY 是宽高的比例    intent.putExtra("aspectX", 1);    intent.putExtra("aspectY", 1);    // outputX outputY 是裁剪图片宽高    intent.putExtra("outputX", 150);    intent.putExtra("outputY", 150);    intent.putExtra("return-data", true);    startActivityForResult(intent, CROP_SMALL_PICTURE);}/** * 保存裁剪之后的图片数据 * * @param * * @param */protected void setImageToView(Intent data) {    Bundle extras = data.getExtras();    if (extras != null) {        Bitmap photo = extras.getParcelable("data");        Utils utils=new Utils();        photo = utils.toRoundBitmap(photo); // 这个时候的图片已经被处理成圆形的了        iv_touxiang.setImageBitmap(photo);        uploadPic(photo);//下载图片    }}private void uploadPic(Bitmap bitmap) {    File file=new File("mnt/sdcard/Linkaipictures/a.jpg");    try {        BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(file));        bitmap.compress(Bitmap.CompressFormat.JPEG,100,bos);        bos.flush();        bos.close();    } catch (Exception e) {        e.printStackTrace();    }    Map<String,Object> params=new HashMap<>();    params.put("uid",uid);    OkHttpClient okHttpClient=new OkHttpClient();    MultipartBody.Builder builder=new MultipartBody.Builder().setType(MultipartBody.FORM);    RequestBody requestBody=RequestBody.create(MediaType.parse("image/*"),file);    builder.addFormDataPart("file",file.getName(),requestBody);    if(params!=null)    {        for (Map.Entry<String, Object> stringObjectEntry : params.entrySet()) {            builder.addFormDataPart(stringObjectEntry.getKey(), (String) stringObjectEntry.getValue());        }    }    Request request=new Request.Builder().post(builder.build()).url(Api.relepace).build();    okHttpClient.newCall(request).enqueue(new Callback() {        private String string;        @Override        public void onFailure(Call call, IOException e) {        }        @Override        public void onResponse(Call call, Response response) throws IOException {            if(response!=null&&response.isSuccessful())            {                string = response.body().string();                System.out.println("=======json==="+ string);            }            runOnUiThread(new Runnable() {                @Override                public void run() {               Toast.makeText(UserActivity.this, "====成功了===", Toast.LENGTH_SHORT).show();                }            });        }    });}