Develop Reference

Image not downloading from Async Task

I am trying to download image on button click through Async Task but the image is not downloading. Is there any problem with the download link in the String "image_url"?
Logcat - skia: --- SkImageDecoder::Factory returned null
public class DownloadImageAsyncTask extends AppCompatActivity {
Button button;
ImageView imageView;
String image_url = "http://www.freegreatdesign.com/files/images/6/2921-large-apple-icon-png-1.jpg";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.download_image_async_task);
button = (Button) findViewById(R.id.bDownload);
imageView = (ImageView) findViewById(R.id.downImage);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DownloadTask downloadTask = new DownloadTask();
downloadTask.execute(image_url);
}
});
}
class DownloadTask extends AsyncTask<String, Integer, String>
{
ProgressDialog progressDialog;
#Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(DownloadImageAsyncTask.this);
progressDialog.setTitle("Download in progress...");
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setMax(100);
progressDialog.setProgress(0);
progressDialog.show();
}
#Override
protected String doInBackground(String... params) {
String path = params[0];
int file_length = 0;
try {
URL url = new URL(path);
URLConnection urlConnection = url.openConnection();
urlConnection.connect();
file_length = urlConnection.getContentLength();
File new_folder = new File("sdcard/photoalbum");
if(!new_folder.exists())
{
new_folder.mkdir();
}
File input_file = new File(new_folder, "downloaded_image.jpg");
InputStream inputStream = new BufferedInputStream(url.openStream(), 8192);
byte[] data = new byte[1024];
int total = 0;
int count = 0;
OutputStream outputStream = new FileOutputStream(input_file);
while((count=inputStream.read())!=-1)
{
total+=count;
outputStream.write(data, 0, count);
int progress = (int) total*100/file_length;
publishProgress(progress);
}
inputStream.close();
outputStream.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "Download Complete...";
}
#Override
protected void onProgressUpdate(Integer... values) {
progressDialog.setProgress(values[0]);
}
#Override
protected void onPostExecute(String result) {
progressDialog.hide();
Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();
String path = "sdcard/photoalbum/downloaded_image.jpg";
imageView.setImageDrawable(Drawable.createFromPath(path));
}
}
}

Android to download a Zip file

I'm trying to download a zip file from an API. For this purpose I'm using this following code:
public class Download_Activity extends Activity {
public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
private Button startBtn;
private ProgressDialog mProgressDialog;
/**
* Called when the activity is first created.
*/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.download);
startBtn = (Button) findViewById(R.id.downloadButton);
startBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startDownload();
}
});
}
private void startDownload() {
String url = downloadURL;
new DownloadFileAsync().execute(url);
}
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_DOWNLOAD_PROGRESS:
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Downloading file..");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setCancelable(false);
mProgressDialog.show();
return mProgressDialog;
default:
return null;
}
}
class DownloadFileAsync extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(DIALOG_DOWNLOAD_PROGRESS);
}
#Override
protected String doInBackground(String... aurl) {
int count;
try {
URL url = new URL(aurl[0]);
URLConnection urlConnection = url.openConnection();
urlConnection.setDoOutput(true);
urlConnection.connect();
Log.i("1111", "1111" );
File SDCardRoot = Environment.getExternalStorageDirectory();
File file = new File(SDCardRoot, "hello1.zip");
Log.i("2222", "2222" );
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
int totalSize = urlConnection.getContentLength();
int downloadedSize = 0;
byte[] buffer = new byte[1024];
int bufferLength = 0;
Log.i("3333", "3333" );
Log.i("befferLength", "bufferLength: " + bufferLength);
Log.i("is read buffer", "is read buffer: " + inputStream.read(buffer));
while ((bufferLength = inputStream.read(buffer)) > 0) {
Log.i("inside while", "inside while ");
fileOutput.write(buffer, 0, bufferLength);
downloadedSize += bufferLength;
updateProgress(downloadedSize, totalSize);
}
Log.i("4444", "4444" );
fileOutput.close();
} catch (Exception e) {
}
return null;
}
protected void onProgressUpdate(String... progress) {
Log.d("ANDRO_ASYNC", progress[0]);
mProgressDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String unused) {
dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
}
}
public void updateProgress(int currentSize, int totalSize) {
Toast.makeText(getApplicationContext(), "Loading Files...",
Toast.LENGTH_SHORT).show();
}
In this code, the zip file is created as "hello1.zip" but this file is empty in my mobile. Here I've various log statements to find the execution of code. To my surprise only upto "Log.i("2222", "2222" );" is printed while the rest of the logs are not printed. Can you please tell me what the problem is???
Thanks in advance..!

U can use DownloadManager class for this purpose it handles the pause and continues the dowloading in the case of network availablity and you can run a broadcast reciver to perform you actions( like pushing a notification etc) when dowloading is complete
http://developer.android.com/reference/android/app/DownloadManager.html

Maintain progress of progressbar on orientation change in android

I am trying to download multiple videos from server using AsyncTask, I have list of progress bar for videos but I am unable to maintain the progress for each progress bar on orientation change of my phone.
I am calling downlodThreadVideos() in adapter of listview
public UserVideoDTO downlodThreadVideos(final ProgressBar _progress, ImageView _imgLaunch, ImageView _imgDownload, UserVideoDTO vpideoDTO)
{
DownloadVideoFileAsyncTask mDownloadFileAsync = new DownloadVideoFileAsyncTask(videoDTO,_progress,_imgLaunch,_imgDownload);
mDownloadFileAsync.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,videoDTO);
return mDownloadFileAsync._videoDTO;
}
private class DownloadVideoFileAsyncTask extends AsyncTask<UserVideoDTO, Integer, UserVideoDTO> {
ProgressBar _progress;
ImageView _imgLaunch;
ImageView _imgDownload;
public UserVideoDTO _videoDTO;
String OfflinePath=null;
public DownloadVideoFileAsyncTask(UserVideoDTO videoDTO,ProgressBar progress, ImageView imgLaunch, ImageView imgDownload) {
// TODO Auto-generated constructor stub
_videoDTO=videoDTO;
_progress = progress;
_imgLaunch=imgLaunch;
_imgDownload=imgDownload;
}
protected UserVideoDTO doInBackground(UserVideoDTO... params) {
UserVideoDTO videoDTO = _videoDTO;
try {
String _videoURL="http://mylinkforvideodownload/videoDTO.onlinepath";
if (cancelThread)
return null;
String Path = new String(_videoURL);
Path = Path.replaceAll(" ", "%20");
URL url = new URL(Path);
long startTime = System.currentTimeMillis();
HttpURLConnection ucon = (HttpURLConnection) url.openConnection();
ucon.setConnectTimeout(60000);
File folder = new File(getExternalFilesDir(null).getAbsolutePath()+"/Download");
folder.mkdir();
String fileName = getExternalFilesDir(null).getAbsolutePath()+ "/Download/videos_";
File file = new File(fileName);
String offlineFileName = videoDTO.lmsvideoid;
String offlineFilePath = file + offlineFileName + ".mp4";
BufferedInputStream inStream = new BufferedInputStream(ucon.getInputStream());
FileOutputStream outStream = new FileOutputStream(offlineFilePath);
byte[] buff = new byte[1024];
int lengthOfFile = ucon.getContentLength();
int len;
long total = 0;
try {
while (!cancelThread && ((len = inStream.read(buff)) != -1)) {
total += len;
publishProgress((int) ((total * 100) / lengthOfFile));
outStream.write(buff, 0, len);
}
} catch (Exception e) {
cancelThread = true;
}
outStream.flush();
outStream.close();
inStream.close();
}
catch (Exception e) {
e.printStackTrace();
}
return videoDTO;
}
protected void onProgressUpdate(Integer... progress) {
Log.d("ANDRO_ASYNC", progress[0].toString());
_progress.setProgress(progress[0]);
}
protected void onPreExecute() {
super.onPreExecute();
_progress.setMax(100);
}
protected void onPostExecute(UserVideoDTO result) {
super.onPostExecute(result);
_progress.setProgress(100);
}
protected void onCancelled() {
super.onCancelled();
}
}

Android Async - Unzip after file download

I'm trying to create a method within my activity that will unzip the downloaded file to a certain directory. I have tried several different ways and haven't had much luck. I've seen some people use a separate class to do this task, I want to avoid doing that, but if it's my only option then I will do it. Here is my activity:
public class lava_parkour extends Activity {
public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
private Button startBtn;
private ProgressDialog mProgressDialog;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lava_parkour);
startBtn = (Button)findViewById(R.id.button1);
startBtn.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
startDownload(v);
} });
}
private void startDownload(View v) {
String url = "https://www.dropbox.com/s/lxnizie52efq3e8/lava%20parkour.zip?
dl=1";
new DownloadFileAsync().execute(url);
}
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_DOWNLOAD_PROGRESS:
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Downloading...");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setCancelable(false);
mProgressDialog.show();
return mProgressDialog;
default:
return null;
}
}
class DownloadFileAsync extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(DIALOG_DOWNLOAD_PROGRESS);
}
#Override
protected String doInBackground(String... aurl) {
int count;
try {
URL url = new URL(aurl[0]);
URLConnection conexion = url.openConnection();
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new
FileOutputStream("/sdcard/games/com.mojang/lava_parkour.zip");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress(""+(int)((total*100)/lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {}
return null;
}
protected void onProgressUpdate(String... progress) {
Log.d("ANDRO_ASYNC",progress[0]);
mProgressDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String unused) {
dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
Toast.makeText(lava_parkour.this, "Process completed! THis map has been added
to your game!", Toast.LENGTH_LONG).show();
}
}
}
Any help is appreciated!

how to download file in android download service

i have this url http://translate.google.com/translate_tts?ie=UTF-8&q=hi&tl=en&total=1&idx=0&textlen=2
when i place it to pc and android browser it makes me force to download
how can i make it download in my android application without browser.
i tried to make to download using this tutorial how can i download audio file from server by url
.but it did not work.
anyone please help
Thank you Kristijana Draca think it is working but where it save in emulator here is my code public class Main extends Activity {
EditText inputtext;
Button listen;
Button shareButton;
TextView tv;
ProgressBar proBar;
//ProgressDialog progress;
MediaPlayer player;
public Boolean isPlaying=true;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
downloadContent();
}
private void downloadContent() {
DownloadFile downloadFile = new DownloadFile();
downloadFile.execute("http://translate.google.com/translate_a/t?client=t&source=baf&sl=ar&tl=en&hl=en&q=%D9%85%D8%B1%D8%AD%D8%A8%D8%A7&sc=1 ");
}
// usually, subclasses of AsyncTask are declared inside the activity class.
// that way, you can easily modify the UI thread from here
class DownloadFile extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... sUrl) {
try {
URL url = new URL(sUrl[0]);
URLConnection connection = url.openConnection();
connection.connect();
int fileLength = connection.getContentLength();
InputStream input = new BufferedInputStream(
connection.getInputStream());
// Create db
OutputStream output = new FileOutputStream(
Environment.getDataDirectory() + "/data/"
+ "com.jony.com" + "/file.mp3");
byte data[] = new byte[1024];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
Toast.makeText(getApplicationContext(), "download complete", 1000).show();
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Toast.makeText(getApplicationContext(), "download complete", 1000).show();
}
}
});

You can download any file using AsyncTask.
downloadContent();
private void downloadContent() {
DownloadFile downloadFile = new DownloadFile();
downloadFile.execute("http://somehost.com/file.mp3");
}
// usually, subclasses of AsyncTask are declared inside the activity class.
// that way, you can easily modify the UI thread from here
private class DownloadFile extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... sUrl) {
try {
URL url = new URL(sUrl[0]);
URLConnection connection = url.openConnection();
connection.connect();
int fileLength = connection.getContentLength();
InputStream input = new BufferedInputStream(
connection.getInputStream());
// Create db
OutputStream output = new FileOutputStream(
Environment.getDataDirectory() + "/data/"
+ PACKAGE_NAME + "/file.mp3");
byte data[] = new byte[1024];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
}