Android客户端使用okhttp上传文件php服务器

	private void uplodeImage(File mFile) {
		//mFile一个真实存在的图片文件
		if (!mFile.exists())
        {
            Toast.makeText(MainActivity.this, "文件不存在，请修改文件路径", Toast.LENGTH_SHORT).show();
            return;
        }
		OkHttpUtils.post()
		.url(UPLODE_URL)
	    .addFile("file", mFile.getName(), mFile)
	    .build()
	    .execute(new Callback<String>() {
			@Override
			public void onError(Call arg0, Exception arg1) {
				System.out.println("上传文件失败");
				info.setText("REEOR:upload error!");
			}
			@Override
			public void onResponse(String arg0) {
				//System.out.println(arg0);
				//上传成功返回文件在服务器上的唯一路径，将此路径保存到数据库中
				info.setText(arg0);
				//这里会返回一个包含上传文件在服务器上的唯一路径，上传成功后将这个字符串保存到数据库中去
			}
			@Override
			public String parseNetworkResponse(Response arg0) throws Exception {
				// TODO Auto-generated method stub
				return arg0.body().string();
			}
		}) ;
	}

<?php 
class upload{
	protected $fileName;
	protected $maxSize;
	protected $allowMime;
	protected $allowExt;
	protected $uploadPath;
	protected $imgFlag;
	protected $fileInfo;
	protected $error;
	protected $ext;
	/**
	 * @param string $fileName
	 * @param string $uploadPath
	 * @param string $imgFlag
	 * @param number $maxSize
	 * @param array $allowExt
	 * @param array $allowMime
	 */
	public function __construct($fileName='myFile',$uploadPath='./uploads',$imgFlag=true,$maxSize=5242880,$allowExt=array('jpeg','jpg','png','gif'),$allowMime=array('image/jpeg','image/png','image/gif')){
	    
	    $this->fileName=$fileName;
		$this->maxSize=$maxSize;
		$this->allowMime=$allowMime;
		$this->allowExt=$allowExt;
		$this->uploadPath=$uploadPath;
		$this->imgFlag=$imgFlag;
		$this->fileInfo=$_FILES[$this->fileName];
	}
	/**
	 * 检测上传文件是否出错
	 * @return boolean
	 */
	protected function checkError(){
		if(!is_null($this->fileInfo)){
			if($this->fileInfo['error']>0){
				switch($this->fileInfo['error']){
					case 1:
						$this->error='超过了PHP配置文件中upload_max_filesize选项的值';
						break;
					case 2:
						$this->error='超过了表单中MAX_FILE_SIZE设置的值';
						break;
					case 3:
						$this->error='文件部分被上传';
						break;
					case 4:
						$this->error='没有选择上传文件';
						break;
					case 6:
						$this->error='没有找到临时目录';
						break;
					case 7:
						$this->error='文件不可写';
						break;
					case 8:
						$this->error='由于PHP的扩展程序中断文件上传';
						break;
						
				}
				return false;
			}else{
				return true;
			}
		}else{
			$this->error='文件上传出错';
			return false;
		}
	}
	/**
	 * 检测上传文件的大小
	 * @return boolean
	 */
	protected function checkSize(){
		if($this->fileInfo['size']>$this->maxSize){
			$this->error='上传文件过大';
			return false;
		}
		return true;
	}
	/**
	 * 检测扩展名
	 * @return boolean
	 */
	protected function checkExt(){
		$this->ext=strtolower(pathinfo($this->fileInfo['name'],PATHINFO_EXTENSION));
		if(!in_array($this->ext,$this->allowExt)){
			$this->error='不允许的扩展名';
			return false;
		}
		return true;
	}
	/**
	 * 检测文件的类型
	 * @return boolean
	 */
	protected function checkMime(){
		if(!in_array($this->fileInfo['type'],$this->allowMime)){
			$this->error='不允许的文件类型';
			return false;
		}
		return true;
	}
	/**
	 * 检测是否是真实图片
	 * @return boolean
	 */
	protected function checkTrueImg(){
		if($this->imgFlag){
			if(!@getimagesize($this->fileInfo['tmp_name'])){
				$this->error='不是真实图片';
				return false;
			}
			return true;
		}
	}
	/**
	 * 检测是否通过HTTP POST方式上传上来的
	 * @return boolean
	 */
	protected function checkHTTPPost(){
		if(!is_uploaded_file($this->fileInfo['tmp_name'])){
			$this->error='文件不是通过HTTP POST方式上传上来的';
			return false;
		}
		return true;
	}
	/**
	 *显示错误 
	 */
	protected function showError(){
		return (Array(
		    'rType'=>-30,
		    'rMessage'=>$this->error
		    )
		);
	}
	/**
	 * 检测目录不存在则创建
	 */
	protected function checkUploadPath(){
		if(!file_exists($this->uploadPath)){
			mkdir($this->uploadPath,0777,true);
		}
	}
	/**
	 * 产生唯一字符串
	 * @return string
	 */
	protected function getUniName(){
		return md5(uniqid(microtime(true),true));
	}
	/**
	 * 上传文件
	 * @return string
	 */
	public function uploadFile(){
		if($this->checkError()&&$this->checkSize()&&$this->checkExt()&&$this->checkMime()&&$this->checkTrueImg()&&$this->checkHTTPPost()){
			$this->checkUploadPath();
			$this->uniName=$this->getUniName();
			$this->destination=$this->uploadPath.'/'.$this->uniName.'.'.$this->ext;
			if(@move_uploaded_file($this->fileInfo['tmp_name'], $this->destination)){
				return  Array(
				    'rType' => 0,
				    'rMessage' => $this->destination
				    );
			}else{
				$this->error='文件移动失败';
				$this->showError();
			}
		}else{
			return $this->showError();
		}
	}
}

<?php
require_once 'upload.class.php';
header("Content-type:text/html;charset=utf8");
$up = new upload('filename');
echo json_encode($up->uploadFile(),JSON_UNESCAPED_UNICODE);