Android使用HttpClient实现文件上传到PHP服务器，并监控进度

服务器端PHP

废话不多说，直接上代码：

<?php
    $target_path  = "./tmp/";//接收文件目录  
    $target_path = $target_path.($_FILES['file']['name']);
    $target_path = iconv("UTF-8","gb2312", $target_path);
    if(move_uploaded_file($_FILES['file']['tmp_name'], $target_path)) {  
       echo "The file ".( $_FILES['file']['name'])." has been uploaded.";
    }else{  
       echo "There was an error uploading the file, please try again! Error Code: ".$_FILES['file']['error'];
    }?>

监控进度实现

首先定义监听器接口，这和上文中是一样的，如下所示：

/** * 进度监听器接口 */public interface ProgressListener {    public void transferred(long transferedBytes);}

实现监控进度的关键部分就在于记录已传输字节数，所以我们需重载FilterOutputStream，重写其中的关键方法，实现进度监听的功能，如下所示，本例中首先重载的是HttpEntityWrapper，顾名思义，就是将需发送的HttpEntity打包，以便计算总字节数，代码如下：

/** * ProgressOutHttpEntity：输出流(OutputStream)时记录已发送字节数 *  * @author Cow *  */public class ProgressOutHttpEntity extends HttpEntityWrapper {    private final ProgressListener listener;    public ProgressOutHttpEntity(final HttpEntity entity,            final ProgressListener listener) {        super(entity);        this.listener = listener;    }    public static class CountingOutputStream extends FilterOutputStream {        private final ProgressListener listener;        private long transferred;        CountingOutputStream(final OutputStream out,                final ProgressListener listener) {            super(out);            this.listener = listener;            this.transferred = 0;        }        @Override        public void write(final byte[] b, final int off, final int len)                throws IOException {            // NO, double-counting, as super.write(byte[], int, int)            // delegates to write(int).            // super.write(b, off, len);            out.write(b, off, len);            this.transferred += len;            this.listener.transferred(this.transferred);        }        @Override        public void write(final int b) throws IOException {            out.write(b);            this.transferred++;            this.listener.transferred(this.transferred);        }    }    @Override    public void writeTo(final OutputStream out) throws IOException {        this.wrappedEntity.writeTo(out instanceof CountingOutputStream ? out                : new CountingOutputStream(out, this.listener));    }}

最后就是使用上述实现的类和Httpclient进行上传并显示进度的功能，非常简单，代码如下，使用AsyncTask异步上传。

public class FileUploadAsyncTask extends AsyncTask<File, Integer, String> {

    private String url = "http://192.168.83.213/receive_file.php";
    private Context context;
    private ProgressDialog pd;
    private long totalSize;

    public FileUploadAsyncTask(Context context) {
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
        pd = new ProgressDialog(context);
        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        pd.setMessage("上传中....");
        pd.setCancelable(false);
        pd.show();
    }

    @Override
    protected String doInBackground(File... params) {
        // 保存需上传文件信息
        MultipartEntityBuilder entitys = MultipartEntityBuilder.create();
        entitys.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        entitys.setCharset(Charset.forName(HTTP.UTF_8));

        File file = params[0];
        entitys.addPart("file", new FileBody(file));
        HttpEntity httpEntity = entitys.build();
        totalSize = httpEntity.getContentLength();
        ProgressOutHttpEntity progressHttpEntity = new ProgressOutHttpEntity(
                httpEntity, new ProgressListener() {
                    @Override
                    public void transferred(long transferedBytes) {
                        publishProgress((int) (100 * transferedBytes / totalSize));
                    }
                });
        return uploadFile(url, progressHttpEntity);
    }

    @Override
    protected void onProgressUpdate(Integer... progress) {
        pd.setProgress((int) (progress[0]));
    }

    @Override
    protected void onPostExecute(String result) {
        pd.dismiss();
        Toast.makeText(context, result, Toast.LENGTH_SHORT).show();
    }

    /**     * 上传文件到服务器     *      * @param url     *            服务器地址     * @param entity     *            文件     * @return     */
    public static String uploadFile(String url, ProgressOutHttpEntity entity) {
        HttpClient httpClient = new DefaultHttpClient();
        httpClient.getParams().setParameter(
                CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
        // 设置连接超时时间
        httpClient.getParams().setParameter(
                CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);
        HttpPost httpPost = new HttpPost(url);
        httpPost.setEntity(entity);
        try {
            HttpResponse httpResponse = httpClient.execute(httpPost);
            if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                return "文件上传成功";
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (ConnectTimeoutException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (httpClient != null && httpClient.getConnectionManager() != null) {
                httpClient.getConnectionManager().shutdown();
            }
        }
        return "文件上传失败";
    }}

最后的最后，上传效果图如下：

有疑问或者觉得不对的地方还请指正，谢谢。

原文链接：http://www.apkbus.com/blog-705730-60264.html