如何在Android的异步类中的FTP下载中显示进度条? [英] How to show the progress bar in FTP download in async class in Android?
本文介绍了如何在Android的异步类中的FTP下载中显示进度条?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何在android的异步类中的FTP下载中显示进度条?
How to show the progress bar in FTP download in async class in android?
我尝试了很多东西，但没有得到进度条.这是我的代码，我正在从其他 Activity 调用这个类，将该 Activity 的上下文传递给这个类.
I've tried many things but didn't get the progress bar. Here's my code, and I'm calling this class from other Activity passing the context of that activity to this class.
package com.scft;
import it.sauronsoftware.ftp4j.FTPClient;
import it.sauronsoftware.ftp4j.FTPDataTransferListener;
import java.io.File;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.StrictMode;
import android.util.Log;
import android.widget.PopupWindow;
import android.widget.Toast;
public class ftpdownload_class {
static final String FTP_HOST= "**************";
/********* FTP USERNAME ***********/
static final String FTP_USER = "*********";
/********* FTP PASSWORD ***********/
static final String FTP_PASS ="*******";
File fileDownload=null;
long startTime_ftpDownload=0;
long endTime_ftpDownload=0;
long downloaded_file=0;
long startTime_ftpUpload=0;
long endTime_ftpUpload=0;
FTPClient client=null;
public static File m_fileName;
private PopupWindow pwindo;
String totaltime_ftpUpload,filesize_ftpUpload,ratevalue_ftpUpload,totaltime_ftpDownload,filesize_ftpDownload,ratevalue_ftp_download;
Context mContext=null;
public ftpdownload_class( Context c)
{
mContext=c;
}
public void ftp_downloadStart() {
FTPClient ftp = new FTPClient();
try {
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy =
new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
ftp.connect(FTP_HOST,158);//158 is the port number
//System.out.println(ftp.connect(host)[0]);
ftp.login(FTP_USER, FTP_PASS);
fileDownload = new File("/sdcard/test.mp3");
fileDownload.createNewFile();
startTime_ftpDownload = System.currentTimeMillis();
ftp.download("test.mp3", fileDownload,
new FTPDataTransferListener() {
// lenghtOfFile = conection.getContentLength();
public void transferred(int arg0) {
// download_btn.setVisibility(View.GONE);
//Log.v("log_tag", "This is for transfer");
// Toast.makeText(getBaseContext(), " transferred ..."+arg0 , Toast.LENGTH_SHORT).show();
}
public void started() {
// TODO Auto-generated method stub
// Toast.makeText(getBaseContext(), " Download Started ...", Toast.LENGTH_SHORT).show();
//Log.v("log_tag", "This is for started");
}
public void failed() {
// download_btn.setVisibility(View.VISIBLE);
Toast.makeText(mContext, " failed ...", Toast.LENGTH_SHORT).show();
System.out.println(" failed ..." );
}
public void completed() {
// download_btn.setVisibility(View.VISIBLE);
endTime_ftpDownload = System.currentTimeMillis(); //maybe
Toast.makeText(mContext, " Download completed ...", Toast.LENGTH_SHORT).show();
getspeedfor_ftp_download();
//Log.v("log_tag", "This is for completed");
}
public void aborted() {
// download_btn.setVisibility(View.VISIBLE);
Toast.makeText(mContext," transfer aborted,please try again...", Toast.LENGTH_SHORT).show();
//Log.v("log_tag", "This is for aborted");
}
});
} catch (Exception e) {
e.printStackTrace();
try {
ftp.disconnect(true);
} catch (Exception e2) {
e2.printStackTrace();
}
}
}
long downloaded_file_ftp=0;
public void getspeedfor_ftp_download()
{
downloaded_file_ftp = fileDownload.length();
//Log.d("DownloadManager", "download ended: " + ((endTime - startTime) / 1000) + " secs");
String abc = (((endTime_ftpDownload - startTime_ftpDownload) / 1000) + " secs");
totaltime_ftpDownload = abc;
double size = (downloaded_file_ftp/1024);
if(size<1000)
filesize_ftpDownload=String.valueOf(size).concat("Kb");
else
filesize_ftpDownload=String.valueOf(size/1024).concat("Mb");
double rate = (((downloaded_file_ftp / 1024) / ((endTime_ftpDownload - startTime_ftpDownload) / 1000)) * 8);
rate = Math.round( rate * 100.0 ) / 100.0;
if(rate > 1000)
ratevalue_ftp_download = String.valueOf(rate / 1024).concat(" Mbps");
else
ratevalue_ftp_download = String.valueOf(rate).concat(" Kbps");
Log.d("DownloadManager", "download speed: "+ratevalue_ftp_download);
alertStatus_ftp_download();
}
public void alertStatus_ftp_download()
{
AlertDialog.Builder alertDialogBuilderfor_ftp_download = new AlertDialog.Builder(mContext);
// set title
alertDialogBuilderfor_ftp_download.setTitle("Ftp Download Speed Status");
// set dialog message
alertDialogBuilderfor_ftp_download
.setMessage("Download Speed : "+ratevalue_ftp_download+", "+"
Total File Size :"+filesize_ftpDownload+"
Total time taken : "+totaltime_ftpDownload)
//.setMessage("Download Speed "+ratevalue_ftp_download)
.setCancelable(false)
.setPositiveButton("Ok",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
dialog.cancel();
}
})
.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialogftp_download = alertDialogBuilderfor_ftp_download.create();
// show it
alertDialogftp_download.show();
}
}
推荐答案
经过数小时的搜索，我终于构建了一个这样的解决方案.创建一个像这样的 Uploader 类 UploadToFtp.java
After searching hours and hours, i finally built a solution like this. Create an Uploader class like this UploadToFtp.java
public class UploadToFtp {
public FTPClient mFTPClient = null;
String host;
String username;
String password;
CopyStreamAdapter streamListener;
ProgressDialog pDialog;
boolean status = false;
public boolean ftpUpload1(String srcFilePath, String desFileName,
String desDirectory, String host, String username, String password,
final ProgressDialog pDialog) {
this.pDialog = pDialog;
this.host = host;
this.username = username;
this.password = password;
int port = 21;
mFTPClient = new FTPClient();
try {
mFTPClient.connect(host, port); // connecting to the host
mFTPClient.login(username, password); // Authenticate using username
// and password
mFTPClient.changeWorkingDirectory(desDirectory); // change directory
System.out.println("Dest Directory-->" + desDirectory); // to that
// directory
// where image
// will be
// uploaded
mFTPClient.setFileType(FTP.BINARY_FILE_TYPE);
BufferedInputStream buffIn = null;
final File file = new File(srcFilePath);
System.out.println("on going file-->" + srcFilePath);
buffIn = new BufferedInputStream(new FileInputStream(file), 8192);
mFTPClient.enterLocalPassiveMode();
streamListener = new CopyStreamAdapter() {
@Override
public void bytesTransferred(long totalBytesTransferred,
int bytesTransferred, long streamSize) {
// this method will be called everytime some
// bytes are transferred
// System.out.println("Stream size" + file.length());
// System.out.println("byte transfeedd "
// + totalBytesTransferred);
int percent = (int) (totalBytesTransferred * 100 / file
.length());
pDialog.setProgress(percent);
if (totalBytesTransferred == file.length()) {
System.out.println("100% transfered");
removeCopyStreamListener(streamListener);
}
}
};
mFTPClient.setCopyStreamListener(streamListener);
status = mFTPClient.storeFile(desFileName, buffIn);
System.out.println("Status Value-->" + status);
buffIn.close();
mFTPClient.logout();
mFTPClient.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
return status;
}
}
现在在实际获取或创建文件的类中创建一个异步任务，就像这样
Now make an Asynctask in the class where file is actually being fetched or being created, like this
class UploadTask extends AsyncTask<Void, Integer, Void> {
ProgressDialog pDialog;
Boolean uploadStat;
UploadToFtp utp = new UploadToFtp();
@Override
protected void onPreExecute() {
pDialog = new ProgressDialog(UploadActivity.this);
pDialog.setMessage("Uploading...");
pDialog.setCancelable(false);
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialog.show();
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... params) {
System.out.println("source url -> " + sourceUrl);
System.out.println("filename -> " + filename);
System.out.println("desDirectory -> " + desDirectory);
uploadStat = new UploadToFtp().ftpUpload1(sourceUrl, filename,
desDirectory, app.getHostname(), app.getUsername(),
app.getPassword(), pDialog);
runOnUiThread(new Runnable() {
@Override
public void run() {
if (uploadStat) {
if (pDialog != null && pDialog.isShowing()) {
pDialog.dismiss();
}
reviewImageView.setImageBitmap(null);
mCurrentPhotoPath = "";
photo = null;
uploadMessage.setVisibility(View.VISIBLE);
UploadSuccess.setVisibility(View.VISIBLE);
} else {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
UploadActivity.this);
// Setting Dialog Message
alertDialog.setTitle("Error Uploading File");
alertDialog
.setMessage("Connection lost during upload, please try again!");
alertDialog.setCancelable(false);
// Setting Icon to Dialog
// Setting OK Button
alertDialog.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
dialog.cancel();
}
});
alertDialog.show();
}
}
});
return null;
}
@Override
protected void onPostExecute(Void result) {
if (pDialog != null && pDialog.isShowing()) {
pDialog.dismiss();
}
System.out.println("Result-->" + result);
super.onPostExecute(result);
}
}
现在只需在按钮单击或您想要的任何其他事件时调用此 Asynctask
Now simply call this Asynctask on button click or any other event you want
new UploadTask().execute();
这篇关于如何在Android的异步类中的FTP下载中显示进度条?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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