Develop Reference

Android Save Video To Gallery

I am developing app using camera on fragment,so for camera I have used this library https://natario1.github.io/CameraView/home because I am using watermarks in camera, now I want to save pictures and videos to gallery, for pictures I have done with below code, for video I done research but not get a solution, for pictures this library is giving bitmap so pictures are saving perfectly but for video I can't figure out kindly help me.
Thank you
public class VideoPreviewActivity extends AppCompatActivity {
private VideoView videoView;
private static VideoResult videoResult;
private Button btnSaveVideo;
public static void setVideoResult(#Nullable VideoResult result) {
videoResult = result;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video_preview);
final VideoResult result = videoResult;
if (result == null) {
finish();
return;
}
btnSaveVideo = findViewById(R.id.save_video);
videoView = findViewById(R.id.video);
videoView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
playVideo();
}
});
AspectRatio ratio = AspectRatio.of(result.getSize());
MediaController controller = new MediaController(this);
controller.setAnchorView(videoView);
controller.setMediaPlayer(videoView);
videoView.setMediaController(controller);
videoView.setVideoURI(Uri.fromFile(result.getFile()));
videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
ViewGroup.LayoutParams lp = videoView.getLayoutParams();
float videoWidth = mp.getVideoWidth();
float videoHeight = mp.getVideoHeight();
float viewWidth = videoView.getWidth();
lp.height = (int) (viewWidth * (videoHeight / videoWidth));
videoView.setLayoutParams(lp);
playVideo();
if (result.isSnapshot()) {
// Log the real size for debugging reason.
Log.e("VideoPreview", "The video full size is " + videoWidth + "x" + videoHeight);
}
}
});
//Click this button to save video
btnSaveVideo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//Calling 1st Method but not working
//SaveVideo(videoResult.getFile().toString());
//2nd method calling but still not working
saveVideoToInternalStorage(videoResult.getFile().toString());
}
});
}
void playVideo() {
if (!videoView.isPlaying()) {
videoView.start();
}
}
#Override
protected void onDestroy() {
super.onDestroy();
if (!isChangingConfigurations()) {
setVideoResult(null);
}
}
//first method which I tried but not working
private void SaveVideo(Uri f) {
//I don't know what data type I have to pass in the methods parameters
String root = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES).getAbsolutePath();
File myDir = new File(root + "/Push Videos");
if (!myDir.exists()) {
myDir.mkdirs();
}
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Video-"+ n +".mp4";
File file = new File (myDir, fname);
if (file.exists ())
file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
Toast.makeText(VideoPreviewActivity.this, "PUSH Video Saved", Toast.LENGTH_LONG).show();
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
//Tried this 2nd method but it is also not giving a desired result
//For saving Video...
private void saveVideoToInternalStorage (String filePath) {
File newfile;
try {
File currentFile = new File(filePath);
String fileName = currentFile.getName();
ContextWrapper cw = new ContextWrapper(getApplicationContext());
File directory = cw.getDir("videoDir", Context.MODE_PRIVATE);
newfile = new File(directory.getAbsolutePath(), fileName);
if(currentFile.exists()){
InputStream in = new FileInputStream(currentFile);
OutputStream out = new FileOutputStream(newfile);
// Copy the bits from instream to outstream
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
scanner(filePath);
in.close();
out.close();
Log.v("", "Video file saved successfully.");
Toast.makeText(this, "Push Video Saved TO Gallery", Toast.LENGTH_SHORT).show();
}else{
Log.v("", "Video saving failed. Source file missing.");
}
} catch (Exception e) {
Log.d("Err ", "EXS " + e.getMessage());
e.printStackTrace();
}
}
}

Trying to add Notification Builder in AsyncTask

Someone helps me out Pls
I wanted to implement a notification builder in my AsyncTask method for downloading files from the server. Notification that contains progress bar with incrementing base on file length, show download percentage and how many MB remain, with pause and resume, I try it but still notification not showing while downloading is doing in the background there is my code:
class DownloadFileFromURL extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(progress_bar_type);
}
#Override
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
int lenghtOfFile = conection.getContentLength();
InputStream input = new BufferedInputStream(url.openStream(), 8192);
String folder = "/data/data/" + getPackageName() + "/files/";
File directory = new File(folder);
if (!directory.exists()) {
directory.mkdirs();
}
OutputStream output = new FileOutputStream(folder + getIntent().getStringExtra("title") + ".mp4");
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) {
Log.e("Error: ", e.getMessage());
}
return null;
}
protected void onProgressUpdate(String... progress) {
pDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String file_url) {
dismissDialog(progress_bar_type);
String type = "downloads";
Update(type);
View layout = getLayoutInflater().inflate(R.layout.toast_custom, findViewById(R.id.custom_toast_layout_id));
TextView text = layout.findViewById(R.id.text);
text.setText(getIntent().getStringExtra("title") + " - Downloaded Successfully!");
Toast toast = new Toast(getApplicationContext());
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(layout);
toast.show();
}
}

Where is the code to show Notification and which android version os are you using ?

File downloading failing in Android Marshmallow and Lollipop

I have created a 'MP4 File Download' Button. It's working fine in android Android Pie and Oreo but not working in Marshmallow or Lollipop. It doesn't download the file in those versions. Can someone point out what I am missing in my code? Thanks in advance.
Here is my download code
public class DownloadFile extends AsyncTask<String, String, String> {
private ProgressDialog progressDialog;
private String fileName;
private String folder;
private boolean isDownloaded;
/**
* Before starting background thread
* Show Progress Bar Dialog
*/
#Override
protected void onPreExecute() {
super.onPreExecute();
this.progressDialog = new ProgressDialog(context);
this.progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
this.progressDialog.setCancelable(false);
this.progressDialog.show();
}
/**
* Downloading file in background thread
*/
#Override
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection connection = url.openConnection();
connection.connect();
// getting file length
int lengthOfFile = connection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(), 8192);
String timestamp = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());
//Extract file name from URL
fileName = f_url[0].substring(f_url[0].lastIndexOf('/') + 1, f_url[0].length());
//Append timestamp to file name
fileName = timestamp + "_" + fileName;
//External directory path to save file
folder = Environment.getExternalStorageDirectory() + File.separator + "Bharti News/";
//Create androiddeft folder if it does not exist
File directory = new File(folder);
if (!directory.exists()) {
directory.mkdirs();
}
// Output stream to write file
OutputStream output = new FileOutputStream(folder + fileName);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress("" + (int) ((total * 100) / lengthOfFile));
Log.d(TAG, "Progress: " + (int) ((total * 100) / lengthOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
return "Downloaded at: " + folder + fileName;
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return "Something went wrong";
}
/**
* Updating progress bar
*/
protected void onProgressUpdate(String... progress) {
// setting progress percentage
progressDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String message) {
// dismiss the dialog after the file was downloaded
this.progressDialog.dismiss();
// Display File path after downloading
Toast.makeText(context,
message, Toast.LENGTH_LONG).show();
}
}
And this is how I am calling it.
new DownloadFile().execute(item.getBodyurl());
It gives me this error - '/storage/emulated/0/Bharti News/2019-05-22-02-19-09_dWJZ7AQesz48Ol2o.mp4: open failed: ENOENT (No such file or directory)'

You should be checking if the user has granted permission of external storage by using:
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
Log.v(TAG,"Permission is granted");
new DownloadFile().execute(item.getBodyurl());
return true;
}else{ ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_CODE);}

Download PDF not working

In my application, I have an expandablelistview and I want to open a PDF downloaded from the internet when I click on a specific child. The problem is that the pdf file (Read.pdf) is always empty, meaning that the download is not working.
Downloader Class:
public class Downloader {
public static void DownloadFile(String fileURL, File directory) {
try {
FileOutputStream f = new FileOutputStream(directory);
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
e.printStackTrace();
}
}
Part of the Activity:
private void registerClick() {
expListView.setOnChildClickListener(new OnChildClickListener() {
#Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
if ((groupPosition == 0) && (childPosition == 0)){
File file = new File(Environment.getExternalStorageDirectory()+File.separator+"IAVE", "Read.pdf");
try {
file.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
Downloader.DownloadFile("https://www.cp.pt/StaticFiles/Passageiros/1_horarios/horarios/PDF/lx/linha_cascais.pdf", file);
AbrirPDF.showPdf();
} else {
}
return false;
}
});
}
I think the OpenPDF (AbrirPDF) doesn't have any problem, but I will post it...
public class AbrirPDF {
public static void showPdf()
{
File file = new File(Environment.getExternalStorageDirectory()+File.separator+"IAVE/Read.pdf");
PackageManager packageManager = ContextGetter.getAppContext().getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
List list = packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
ContextGetter.getAppContext().startActivity(intent);
}
}
Thank you.

Ideally, your download should happen in a separate thread to avoid locking your app.
Here is an example that also includes a progress bar.
public class MainActivity extends Activity {
private ProgressDialog pDialog;
public static final int progress_bar_type = 0;
private static String file_url = "https://www.cp.pt/StaticFiles/Passageiros/1_horarios/horarios/PDF/lx/linha_cascais.pdf";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new DownloadFileFromURL().execute(file_url);
}
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case progress_bar_type: // we set this to 0
pDialog = new ProgressDialog(this);
pDialog.setMessage("Downloading file. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setMax(100);
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialog.setCancelable(true);
pDialog.show();
return pDialog;
default:
return null;
}
}
class DownloadFileFromURL extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(progress_bar_type);
}
#Override
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
// this will be useful so that you can show a tipical 0-100%
// progress bar
int lenghtOfFile = conection.getContentLength();
// download the file
InputStream input = new BufferedInputStream(url.openStream(),
8192);
// Output stream
OutputStream output = new FileOutputStream(Environment
.getExternalStorageDirectory().toString()
+ "/2011.kml");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
protected void onProgressUpdate(String... progress) {
// setting progress percentage
pDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String file_url) {
// dismiss the dialog after the file was downloaded
dismissDialog(progress_bar_type);
}
}
}

How to cancel an AsyncTask after it has been executed?

I use AsyncTask with Progress Dialog for downloading a database from a server. I want to provide user with an option of cancellation the downloading task.
My purpose is to dismiss Progress Dialog and cancel AsyncTask when user click on Cancel button on Progress Dialog.
I have applied numerous code examples but they help to dismiss Progress Dialog only and fail to stop or cancel the downloading task.
Regarding my code lines below, can you please give a little help? Many thanks.
EDITED VERSION
public class Download_gram extends Activity {
// File url to download
private static String url = "https://dl.dropbox.com/u/15034088/Anhroid_Dict/grammar.nvk.zip";
private static DownloadFile newTask;
// Progress Dialog
private ProgressDialog progressDialog;
// Progress dialog type (0 - for Horizontal progress bar)
public static final int progress_bar = 0;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.download_gram);
newTask = new DownloadFile();
startDownload_gram = (Button) findViewById(R.id.btnProgressBar_gram);
//start download event and show progress bar
startDownload_gram.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Checi if file exists
File fgram = new File(Environment.getExternalStorageDirectory()+"/my_Folder/db/my_file/my_file.nvk");
if(fgram.exists())
{
Toast.makeText(getApplicationContext(), "File installed.", Toast.LENGTH_LONG).show();
}
else
{
//checking if the user has an internet connection
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
if (info != null) {
if (!info.isConnected()) {
Toast.makeText(getApplicationContext(), "No Internet connection!", Toast.LENGTH_SHORT).show();
}
// execute async task
else
//new DownloadFile().execute(url);
newTask.execute(url);
}
else {
Toast.makeText(getApplicationContext(), "No Internet connection!", Toast.LENGTH_SHORT).show();
}
}
}});
}
//show progress dialog
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case progress_bar:
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Downloading… Please wait.");
progressDialog.setIndeterminate(false);
progressDialog.setMax(100);
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setCancelable(false);
progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dismissDialog(progress_bar);
newTask.cancel(true);
}
});
progressDialog.show();
return progressDialog;
default:
return null;
}
}
//backgroound downloading
class DownloadFile extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(progress_bar);
}
#Override
protected String doInBackground(String... args) {
while (url != null) {
int count;
try {
URL url = new URL(args[0]);
URLConnection conection = url.openConnection();
conection.connect();
// getting file length
int fileLength = conection.getContentLength();
InputStream is = new BufferedInputStream(url.openStream(), 8192);
OutputStream os = new FileOutputStream(Environment.getExternalStorageDirectory().getPath() + "/_nvk_gram.zip");
byte data[] = new byte[1024];
long total = 0;
while ((count = is.read(data)) != -1) {
total += count;
publishProgress(""+(int)((total*100)/fileLength));
// writing data to file
os.write(data, 0, count);
}
// flush output
os.flush();
os.close();
is.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
//Unzip the downloaded zip file
{
String destinationDirectory = Environment.getExternalStorageDirectory().getPath() + "/my_Folder/db/my_file/";
int BUFFER = 2048;
List<String> zipFiles = new ArrayList<String>();
File sourceZipFile = new File(Environment.getExternalStorageDirectory().getPath() + "/_nvk_gram.zip");
File unzipDestinationDirectory = new File(destinationDirectory);
unzipDestinationDirectory.mkdir();
ZipFile zipFile = null;
// Open Zip file for reading
try {
zipFile = new ZipFile(sourceZipFile, ZipFile.OPEN_READ);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Create an enumeration of the entries in the zip file
Enumeration<? extends ZipEntry> zipFileEntries = zipFile.entries();
// Process each entry
while (zipFileEntries.hasMoreElements()) {
// grab a zip file entry
ZipEntry entry = (ZipEntry) zipFileEntries.nextElement();
String currentEntry = entry.getName();
File destFile = new File(unzipDestinationDirectory, currentEntry);
//destFile = new File(unzipDestinationDirectory, destFile.getName());
if (currentEntry.endsWith(".zip")) {
zipFiles.add(destFile.getAbsolutePath());
}
// grab file's parent directory structure
File destinationParent = destFile.getParentFile();
// create the parent directory structure if needed
destinationParent.mkdirs();
try {
// extract file if not a directory
if (!entry.isDirectory()) {
BufferedInputStream is =
new BufferedInputStream(zipFile.getInputStream(entry));
int currentByte;
// establish buffer for writing file
byte data[] = new byte[BUFFER];
// write the current file to disk
FileOutputStream fos = new FileOutputStream(destFile);
BufferedOutputStream dest =
new BufferedOutputStream(fos, BUFFER);
// read and write until last byte is encountered
while ((currentByte = is.read(data, 0, BUFFER)) != -1) {
dest.write(data, 0, currentByte);
}
dest.flush();
dest.close();
is.close();
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
try {
zipFile.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for (Iterator<String> iter = zipFiles.iterator(); iter.hasNext();) {
String zipName = (String)iter.next();
doUnzip(
zipName,
destinationDirectory +
File.separatorChar +
zipName.substring(0,zipName.lastIndexOf(".zip"))
);
if(isCancelled())return (null);
}
}
}
File fav_ifo = new File(Environment.getExternalStorageDirectory()+"/my_Folder/db/my_file/my_file.nvk");
if(fav_ifo.exists())
{
try {
AssetManager am = getAssets();
String fileName = "my_file.ifo";
File destinationFile = new File(Environment.getExternalStorageDirectory()+"/my_Folder/db/my_file/" + fileName);
InputStream in = am.open("my_file.ifo");
FileOutputStream f = new FileOutputStream(destinationFile);
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
Log.d("CopyFileFromAssetsToSD", e.getMessage());
}
}
else
{
}
//Delete the downloaded zip
File folder = Environment.getExternalStorageDirectory();
String fileName = folder.getPath() + "/_nvk_gram.zip";
File myFile = new File(fileName);
if(myFile.exists())
myFile.delete();
return null;
}
private void doUnzip(String zipName, String string) {
// TODO Auto-generated method stub
}
//updating progress bar
protected void onProgressUpdate(String... progress) {
//progress percentage
progressDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String file_url) {
dismissDialog(progress_bar);
//toast to notify user of download completion
Toast.makeText(getApplicationContext(), "Database successfully downloaded.", Toast.LENGTH_LONG).show();
Intent mainIntent = new Intent(Download_gram.this, my_Main_class.class);
Download_gram.this.startActivity(mainIntent);
}
}
}

see you should keep track of your DownloadFile(aSyncTask) class object.
Create a new variable in your
public class Download_gram extends Activity {
// File url to download
private static String url = "http://www.abc.123.zip";
private static DownloadFile newTask; // ADDED BY ME
// ... ...
you should save the object reference when you call
new DownloadFile().execute("Url String"); //you must be doing this
//instead you should do
newTask = new DownloadFile();
newTask.execute("Url String"); // YOUR OBJECT IS IN newTask
...
// keep track of this newTask variable
// when ever you want to cancel just call
newTask.cancel(true); // ADDED BY ME
dialog.dismiss();//In fact, I want to apply the code to stop both Progress Dialog and AsynTask here.
after setting newTask to cancel, you should check timely in doInBackground that is you task is canceled ? if yes then exit doInBackground
// YOU CAN USE THIS IN WHILE LOOP OF doInBakcground
if(isCancelled())return (null);
//This will exit doInBackground function and hence cancel task.
// you can perform other operations too in this "if" statement as per your need.
for reference of these functions
http://developer.android.com/reference/android/os/AsyncTask.html#cancel(boolean)
##################### New Version ################.
you haven't checked is the task is canceled or not. you have to check everywhere downloading is taking place in asynctask if iscancelled is true return (null); to halt asynctask and stop downloading.
you should replace following code:
while ((count = is.read(data)) != -1) { // inside doInBackground
total += count;
publishProgress(""+(int)((total*100)/fileLength));
// writing data to file
os.write(data, 0, count);
if(isCancelled())return (null); // ADDED BY ME
}
above added line is must this will check if task is canceled this doInBackground function should be over.

You should to
yourAsyncTask.cancel(true);
and, inside your class DownloadFile, you should to check for isCanceled() and do a return if true.

You can do it in this way,
progressDialog.setOnCancelListener(new DialogInterface.OnCancelListener(){
public void onCancel(DialogInterface dialog) {
yourAysncTask.cancel(true);
}
});