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Android图片异步上传到PHP服务器

关键词:AndroidPHP服务器上传图片  阅读(9115) 赞(12)

[摘要]本文是对Android图片异步上传到PHP服务器的讲解,对学习Android编程技术有所帮助,与大家分享。

背景

网上很多上传到java服务器上的,找了好久,找到了上传到php的了,思路跟我当初想的差不多,就是POST过去。废话不多说,直接上图看代码。

imageimage

image

php代码

<?php
$target_path  = "./upload/";//接收文件目录
$target_path = $target_path . ( $_FILES['uploadedfile']['name']);
if(($_FILES['uploadedfile']['tmp_name'], $target_path)) {
   echo "The file ".  ( $_FILES['uploadedfile']['name']). " has been uploaded";
}  else{
   echo "There was an error uploading the file, please try again!" . $_FILES['uploadedfile']['error'];
}
?>

Android代码

上传的主要代码:

private void uploadFile(String uploadUrl)
  {
    String end = "\r\n";
    String twoHyphens = "--";
    String boundary = "******";
    try
    {
      URL url = new URL(uploadUrl);
      HttpURLConnection httpURLConnection = (HttpURLConnection) url
          .openConnection();//http连接
      // 设置每次传输的流大小,可以有效防止手机因为内存不足崩溃
      // 此方法用于在预先不知道内容长度时启用没有进行内部缓冲的 HTTP 请求正文的流。
      httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K
      // 允许输入输出流
      httpURLConnection.setDoInput(true);
      httpURLConnection.setDoOutput(true);
      httpURLConnection.setUseCaches(false);
      // 使用POST方法
      httpURLConnection.setRequestMethod("POST");
      httpURLConnection.setRequestProperty("Connection", "Keep-Alive");//保持一直连接
      httpURLConnection.setRequestProperty("Charset", "UTF-8");//编码
      httpURLConnection.setRequestProperty("Content-Type",
          "multipart/form-data;boundary=" + boundary);//POST传递过去的编码

      DataOutputStream dos = new DataOutputStream(
          httpURLConnection.getOutputStream());//输出流
      dos.writeBytes(twoHyphens + boundary + end);
      dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\"; filename=\""
          + srcPath.substring(srcPath.lastIndexOf("/") + 1)
          + "\""
          + end);
      dos.writeBytes(end);

      FileInputStream fis = new FileInputStream(srcPath);//文件输入流,写入到内存中
      byte[] buffer = new byte[8192]; // 8k
      int count = 0;
      // 读取文件
      while ((count = fis.read(buffer)) != -1)
      {
        dos.write(buffer, 0, count);
      }
      fis.close();

      dos.writeBytes(end);
      dos.writeBytes(twoHyphens + boundary + twoHyphens + end);
      dos.flush();

      InputStream is = httpURLConnection.getInputStream();//http输入,即得到返回的结果
      InputStreamReader isr = new InputStreamReader(is, "utf-8");
      BufferedReader br = new BufferedReader(isr);
      String result = br.readLine();

      Toast.makeText(this, result, Toast.LENGTH_LONG).show();//将结果输出
      dos.close();
      is.close();

    } catch (Exception e)
    {
      e.printStackTrace();
      setTitle(e.getMessage());
    }
  }

因为安卓4.0之后耗时间的操作要求都在非UI线程中操作,即将前面的AsyncTask拿来用了吧~

AsyncTask传送门:http://www.cnblogs.com/yydcdut/p/3707960.html

在这个类中,将上传的操作放在doInBackground当中,可以有ProgressDialog显示上传了多少:

// Read file
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);

            while (bytesRead > 0) {
                outputStream.write(buffer, 0, bufferSize);
                length += bufferSize;
                progress = (int) ((length * 100) / totalSize);
                publishProgress(progress);

                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            }
            outputStream.writeBytes(lineEnd);
            outputStream.writeBytes(twoHyphens + boundary + twoHyphens
                    + lineEnd);
            publishProgress(100);

还有就是,注意权限哟:

<uses-permission android:name="android.permission.INTERNET" />

我是天王盖地虎的分割线

源代码下载



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