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

服务器端PHP
代码如下 ：

<?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，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:

 // ProgressOutHttpEntity：输出流(OutputStream)时记录已发送    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));    }    }

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
//服务器地址
//文件

 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";    }}

转载请注明：安度博客 » Android使用HttpClient实现文件上传到PHP服务器，并监控进度条

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