moralschool
سه شنبه 30 اردیبهشت 1393, 22:18 عصر
من برای دانلود مثلا یه فایل صوتی از اینترنت از این مشکلات رو دارم :
1- اگه کاربر روی دکمه back کلیک کرد ، دانلود فایل لغو میشه و اگه دوباره بخواد اونو دانلود کنه باید از اول این کار رو انجام بده !
2- و یه مشکل بزرگتر اینه که اگه در حین دانلود صفحه نمایش رو لمس کنه ، بازم دانلود لغو میشه !!!!!!!
دوستان برای حل این مشکل چه راهی رو پیشنهاد میکنند ؟
ممنون
اینم کدی هست که در یه دکمه برای دانلود فایل صوتی استفاده میکنم :
imgdownload.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
File file = new File(root.getAbsolutePath() + "/my_folder/" + "music.mp3");
if (file.exists() ){
//imgdownload1.setEnabled(false);
imgplay1.setEnabled(true);
Toast.makeText(getApplicationContext(), "فایل قبلا دانلود شده است", Toast.LENGTH_LONG).show();
return;
}
if(isNetworkConnected()){ // check internet connection
// your codes
// instantiate it within the onCreate method
mProgressDialog = new ProgressDialog(Main.this); // MainActivity = activity name
mProgressDialog.setMessage("فایل در حال دانلود می باشد");
mProgressDialog.setIndeterminate(true);
mProgressDialog.setProgressStyle(ProgressDialog.ST YLE_HORIZONTAL);
mProgressDialog.setCancelable(true);
// execute this when the downloader must be fired
final DownloadTask downloadTask = new DownloadTask(Main.this); // MainActivity = activity name
downloadTask.execute("http://آدرس فایل.mp3"); // the url to the file you want to download
mProgressDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
downloadTask.cancel(true);
File file = new File(root.getAbsolutePath() + "/my_folder/" + "music.mp3");
if (file.exists() ){
file.delete();
return;
}
}
});
}
}
// usually, subclasses of AsyncTask are declared inside the activity class.
// that way, you can easily modify the UI thread from here
class DownloadTask extends AsyncTask<String, Integer, String> {
private Context context;
public DownloadTask(Context context) {
this.context = context;
}
@Override
protected String doInBackground(String... sUrl) {
// take CPU lock to prevent CPU from going off if the user
// presses the power button during download
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
getClass().getName());
wl.acquire();
try {
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(sUrl[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK)
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
// this will be useful to display download percentage
// might be -1: server did not report the length
int fileLength = connection.getContentLength();
// download the file
input = connection.getInputStream();
// output = new FileOutputStream("/sdcard/my_folder/music.mp3"); // /sdcard/file_name.extension
File outputFile = new File("/sdcard/my_folder/music.mp3" + ".tmp");
output = new FileOutputStream(outputFile);
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled())
return null;
total += count;
// publishing the progress....
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
outputFile.renameTo(new File("/sdcard/my_folder/music.mp3"));
} catch (Exception e) {
return e.toString();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
}
catch (IOException ignored) { }
if (connection != null)
connection.disconnect();
}
} finally {
wl.release();
}
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.show();
}
@Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
// if we get here, length is known, now set indeterminate to false
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgress(progress[0]);
}
@Override
protected void onPostExecute(String result) {
mProgressDialog.dismiss();
if (result != null)
Toast.makeText(context,"Download error: "+result, Toast.LENGTH_LONG).show();
else
Toast.makeText(context,"فایل با موفقیت دانلود شد", Toast.LENGTH_SHORT).show();
}
}
});
1- اگه کاربر روی دکمه back کلیک کرد ، دانلود فایل لغو میشه و اگه دوباره بخواد اونو دانلود کنه باید از اول این کار رو انجام بده !
2- و یه مشکل بزرگتر اینه که اگه در حین دانلود صفحه نمایش رو لمس کنه ، بازم دانلود لغو میشه !!!!!!!
دوستان برای حل این مشکل چه راهی رو پیشنهاد میکنند ؟
ممنون
اینم کدی هست که در یه دکمه برای دانلود فایل صوتی استفاده میکنم :
imgdownload.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
File file = new File(root.getAbsolutePath() + "/my_folder/" + "music.mp3");
if (file.exists() ){
//imgdownload1.setEnabled(false);
imgplay1.setEnabled(true);
Toast.makeText(getApplicationContext(), "فایل قبلا دانلود شده است", Toast.LENGTH_LONG).show();
return;
}
if(isNetworkConnected()){ // check internet connection
// your codes
// instantiate it within the onCreate method
mProgressDialog = new ProgressDialog(Main.this); // MainActivity = activity name
mProgressDialog.setMessage("فایل در حال دانلود می باشد");
mProgressDialog.setIndeterminate(true);
mProgressDialog.setProgressStyle(ProgressDialog.ST YLE_HORIZONTAL);
mProgressDialog.setCancelable(true);
// execute this when the downloader must be fired
final DownloadTask downloadTask = new DownloadTask(Main.this); // MainActivity = activity name
downloadTask.execute("http://آدرس فایل.mp3"); // the url to the file you want to download
mProgressDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
downloadTask.cancel(true);
File file = new File(root.getAbsolutePath() + "/my_folder/" + "music.mp3");
if (file.exists() ){
file.delete();
return;
}
}
});
}
}
// usually, subclasses of AsyncTask are declared inside the activity class.
// that way, you can easily modify the UI thread from here
class DownloadTask extends AsyncTask<String, Integer, String> {
private Context context;
public DownloadTask(Context context) {
this.context = context;
}
@Override
protected String doInBackground(String... sUrl) {
// take CPU lock to prevent CPU from going off if the user
// presses the power button during download
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
getClass().getName());
wl.acquire();
try {
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(sUrl[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK)
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
// this will be useful to display download percentage
// might be -1: server did not report the length
int fileLength = connection.getContentLength();
// download the file
input = connection.getInputStream();
// output = new FileOutputStream("/sdcard/my_folder/music.mp3"); // /sdcard/file_name.extension
File outputFile = new File("/sdcard/my_folder/music.mp3" + ".tmp");
output = new FileOutputStream(outputFile);
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled())
return null;
total += count;
// publishing the progress....
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
outputFile.renameTo(new File("/sdcard/my_folder/music.mp3"));
} catch (Exception e) {
return e.toString();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
}
catch (IOException ignored) { }
if (connection != null)
connection.disconnect();
}
} finally {
wl.release();
}
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.show();
}
@Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
// if we get here, length is known, now set indeterminate to false
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgress(progress[0]);
}
@Override
protected void onPostExecute(String result) {
mProgressDialog.dismiss();
if (result != null)
Toast.makeText(context,"Download error: "+result, Toast.LENGTH_LONG).show();
else
Toast.makeText(context,"فایل با موفقیت دانلود شد", Toast.LENGTH_SHORT).show();
}
}
});