我有一个运行 Android 的 FTP 系统,但我希望能够在上传时跟踪字节,这样我就可以在上传过程中更新进度条。安卓可以实现这个功能吗?现在,我正在使用org.apache.common.net.ftp
我正在使用的代码如下。另外,我在 AsyncTask 中运行它。
package com.dronnoc.ftp.complex;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.io.CopyStreamEvent;
import org.apache.commons.net.io.CopyStreamListener;
import org.apache.commons.net.io.Util;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.main);
String text = "BIGFILE"; //Big file here
InputStream data = new ByteArrayInputStream(text.getBytes());
new ComplexFTPTransfer().execute(data);
}
private class ComplexFTPTransfer extends AsyncTask<InputStream, Long[], Void>
{
private FTPClient ftp = null;
@Override
protected void onPreExecute() {
super.onPreExecute();
try {
ftp = new FTPClient();
ftp.connect("hostname");
} catch (SocketException e) {
this.cancel(true);
} catch (IOException e) {
this.cancel(true);
}
Main.this.setProgressBarIndeterminateVisibility(true);
}
@Override
protected Void doInBackground(InputStream... params) {
if(!this.isCancelled())
{
try
{
if(ftp.login("user", "pass"))
{
ftp.enterLocalPassiveMode();
InputStream item = params[0];
int streamSize = 0;
while(item.read() != -1)
{
streamSize++;
}
InputStream is = new BufferedInputStream(params[0], streamSize);
OutputStream os = ftp.storeFileStream("/test.txt");
Util.copyStream(is, os, streamSize, streamSize, new CopyStreamListener() {
@Override
public void bytesTransferred(long totalBytesTransferred, int bytesTransferred, long streamSize) {
publishProgress(new Long[] {totalBytesTransferred, streamSize});
}
@Override
public void bytesTransferred(CopyStreamEvent event) {
}
});
ftp.completePendingCommand();
}
ftp.logout();
ftp.disconnect();
}
catch (IOException e) {
}
catch (Exception e) {
}
}
return null;
}
@Override
protected void onProgressUpdate(Long[]... values) {
super.onProgressUpdate(values);
Log.d("UPDATE", values[0] + " of " + values[1] + " copied.");
//TODO Put code here
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Main.this.setProgressBarIndeterminateVisibility(false);
}
}
}
我想知道的是我是否可以运行进度条,每隔几个上传的字节更新一次?
干杯
This https://stackoverflow.com/questions/3739626/upload-file-or-inputstream-to-s3-with-a-progress-callback问题有一个包含进度回调的 InputStream 实现。使用该InputStream 并从该回调中调用publishProgress 以在文件上传期间进行增量更新。
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