I want to add a feature to my app in which the users can upload files (PDF files) from their mobile to the database, then download this file back to the app and display it.
I have no idea how to start doing this and what is the right code to use.
I tried using this code,
ParseObject pObject = new ParseObject("ExampleObject");
pObject.put("myNumber", number);
pObject.put("myString", name);
pObject.saveInBackground(); // asynchronous, no callback
- EDIT -
I tried this code but the app crashes when I click the button:
public class Test extends Activity {
Button btn;
File PDFFile;
ParseObject po;
String userPDFFile;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
po = new ParseObject("pdfFilesUser");
btn = (Button) findViewById(R.id.button);
PDFFile = new File("res/raw/test.pdf");
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
uploadPDFToParse(PDFFile, po, userPDFFile);
}
});
}
private ParseObject uploadPDFToParse(File PDFFile, ParseObject po, String columnName){
if(PDFFile != null){
Log.d("EB", "PDFFile is not NULL: " + PDFFile.toString());
ByteArrayOutputStream out = new ByteArrayOutputStream();
BufferedInputStream in = null;
try {
in = new BufferedInputStream(new FileInputStream(PDFFile));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
int read;
byte[] buff = new byte[1024];
try {
while ((read = in.read(buff)) > 0)
{
out.write(buff, 0, read);
}
} catch (IOException e) {
e.printStackTrace();
}
try {
out.flush();
} catch (IOException e) {
e.printStackTrace();
}
byte[] pdfBytes = out.toByteArray();
// Create the ParseFile
ParseFile file = new ParseFile(PDFFile.getName() , pdfBytes);
po.put(columnName, file);
// Upload the file into Parse Cloud
file.saveInBackground();
po.saveInBackground();
}
return po;
}
}
You can upload a file manually via REST API. Take a look at this docs here
Can try this code:
private ParseObject uploadPDFToParse(File PDFFile, ParseObject po, String columnName){
if(PDFFile != null){
Log.d("EB", "PDFFile is not NULL: " + PDFFile.toString());
ByteArrayOutputStream out = new ByteArrayOutputStream();
BufferedInputStream in = null;
try {
in = new BufferedInputStream(new FileInputStream(PDFFile));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
int read;
byte[] buff = new byte[1024];
try {
while ((read = in.read(buff)) > 0)
{
out.write(buff, 0, read);
}
} catch (IOException e) {
e.printStackTrace();
}
try {
out.flush();
} catch (IOException e) {
e.printStackTrace();
}
byte[] pdfBytes = out.toByteArray();
// Create the ParseFile
ParseFile file = new ParseFile(PDFFile.getName() , pdfBytes);
po.put(columnName, file);
// Upload the file into Parse Cloud
file.saveInBackground();
po.saveInBackground();
}
return po;
}
For more details check this
I would strongly suggest you quickly get up to speed with the Parse Java development wiki.
To answer your question. You want to be using:
byte[] data = "Working at Parse is great!".getBytes();
ParseFile file = new ParseFile("resume.txt", data);
file.saveInBackground();
First declare your file etc then save it using that. But once again, first read the guidelines to better understand the framework you working with.
https://parseplatform.github.io/docs/android/guide/
Related
I have already succeeded with this operation with images, but I cannot do it with other type of file, in my case I try to insert a database.
Here is an example of the code for the images:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q){
try {
try {
pictures = assetManager.list("photos/dataset1");
} catch (IOException e) {
Log.e("tag", "Failed to get asset file list.", e);
}
if (pictures != null) {
for (String filename : pictures) {
InputStream in;
OutputStream out;
InputStream inputStream = assetManager.open("photos/dataset1/"+filename);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
saveImageToGallery(bitmap);
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
This method below works for the images :
public void saveImageToGallery(Bitmap bitmap) {
OutputStream outputStream;
Context myContext = requireContext();
try {
if(Build.VERSION.SDK_INT >=Build.VERSION_CODES.Q){
ContentResolver contentResolver = requireContext().getContentResolver();
ContentValues contentValues = new ContentValues();
contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME,"Image_"+".jpg");
contentValues.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_PICTURES);
Uri imageUri = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);
outputStream = contentResolver.openOutputStream(Objects.requireNonNull(imageUri));
bitmap.compress(Bitmap.CompressFormat.JPEG,100, outputStream);
Objects.requireNonNull(outputStream);
}
}catch (FileNotFoundException e) {
e.printStackTrace();
}
}
and there my try for the other type of file :
AssetManager assetManager = Objects.requireNonNull(requireContext()).getAssets();
Context myContext = requireContext();
//Essential for creating the external storage directory for the first launch
myContext.getExternalFilesDir(null);
File databasesFolder = new File(myContext.getExternalFilesDir(null).getParent(), "com.mydb.orca/databases");
databasesFolder.mkdirs();
if (files!= null) {
for (String filename : files) {
InputStream in;
OutputStream out;
try {
in = assetManager.open("database/test/" + filename);
File outFile = new File(databasesFolder, filename);
out = new FileOutputStream(outFile);
copyFile(in, out);
in.close();
out.flush();
out.close();
} catch (IOException e) {
Log.e("tag", "Failed to copy asset file: " + filename, e);
}
}
} else {
Log.e("Error NPE", "files is null");
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
This code above is not working, I mean, I don't get any errors or the desired result. I want something like this or a function similary as the function for my images but for any type of file.
When I run my application I have no error however nothing happens
I finally find a solution, I pretty sure it's not the best way but it work.
I give me access to all files acccess by this way :
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R){
try {
Intent intentFiles = new Intent();
intentFiles.setAction(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
Uri uriFiles = Uri.fromParts("package", myContext.getPackageName(), null);
intentFiles.setData(uriFiles);
myContext.startActivity(intentFiles);
} catch (Exception e)
{
Intent intentFiles = new Intent();
intentFiles.setAction(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
myContext.startActivity(intentFiles);
}
add this line to your manifest:
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
after that, this code below work :
AssetManager assetManager = Objects.requireNonNull(requireContext()).getAssets();
Context myContext = requireContext();
//Essential for creating the external storage directory for the first launch
myContext.getExternalFilesDir(null);
File databasesFolder = new File(myContext.getExternalFilesDir(null).getParent(), "com.mydb.orca/databases");
databasesFolder.mkdirs();
if (files!= null) {
for (String filename : files) {
InputStream in;
OutputStream out;
try {
in = assetManager.open("database/test/" + filename);
File outFile = new File(databasesFolder, filename);
out = new FileOutputStream(outFile);
copyFile(in, out);
in.close();
out.flush();
out.close();
} catch (IOException e) {
Log.e("tag", "Failed to copy asset file: " + filename, e);
}
}
} else {
Log.e("Error NPE", "files is null");
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
if someone have a best solution it should be nice
I tested on android 11 and it work
I examined similar subjects, but I couldn't do it. I'm trying to share .mp3 file with LongClick button. I found it for JPEG files. One guy created method for sharing jpeg file. How can I convert it for .mp3 files?
package com.example.tunch.trap;
import...
public class sansar extends AppCompatActivity {
private String yardik;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_sansar);
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
yardik = createImageOnSDCard(R.raw.yardik_denizi);
final MediaPlayer yardikdenizi = MediaPlayer.create(this, R.raw.yardik_denizi);
Button btnYardik = (Button) findViewById(R.id.btnSansar_1);
btnYardik.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(yardikdenizi.isPlaying()){
yardikdenizi.seekTo(0);
}
yardikdenizi.start();
}
});
btnYardik.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
Uri path= FileProvider.getUriForFile(sansar.this, "com.example.tunch.trap", new File(yardik));
Intent shareYardik = new Intent();
shareYardik.setAction(Intent.ACTION_SEND);
shareYardik.putExtra(Intent.EXTRA_TEXT,"Bu ses dosyasını gönderiyorum");
shareYardik.putExtra(Intent.EXTRA_STREAM, path);
shareYardik.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
shareYardik.setType("audio/mp3");
startActivity(Intent.createChooser(shareYardik, "Paylas.."));
return true;
}
});
}
private String createImageOnSDCard(int resID) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), resID);
String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/" + resID +".mp3";
File file = new File(path);
try {
OutputStream out = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
}
catch (Exception e){
e.printStackTrace();
}
return file.getPath();
}
}
This is all Java code. createImageOnSDCard method is for images. I want to use it for my audio file (yardik_denizi.mp3). When I run this, it works but program is trying to send jpeg file. So it doesn't work literally :) How should I change that last part?
You need a method that copies a private raw resource content (R.raw.yardik_denizi) to a publicly readable file such that the latter can be shared with other applications:
public void copyPrivateRawResuorceToPubliclyAccessibleFile(#RawRes int resID,
#NonNull String outputFile) {
InputStream inputStream = null;
FileOutputStream outputStream = null;
try {
inputStream = getResources().openRawResource(resID);
outputStream = openFileOutput(outputFile, Context.MODE_WORLD_READABLE
| Context.MODE_APPEND);
byte[] buffer = new byte[1024];
int length = 0;
try {
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
} catch (IOException ioe) {
/* ignore */
}
} catch (FileNotFoundException fnfe) {
/* ignore */
} finally {
try {
inputStream.close();
} catch (IOException ioe) {
/* ignore */
}
try {
outputStream.close();
} catch (IOException ioe) {
/* ignore */
}
}
}
and then:
copyPrivateRawResuorceToPubliclyAccessibleFile(R.raw.yardik_denizi, "sound.mp3");
final Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("audio/*");
Uri uri = Uri.fromFile(getFileStreamPath("sound.mp3"));
shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(shareIntent, "Share Sound File"));
You should change the path for uri at
Uri path= FileProvider.getUriForFile(sansar.this, "com.example.tunch.trap", new File(change_it_path_to_yardik_denizi.mp3));
Finally i got the answer. I can send mp3 files to other apps with this code.
copyFiletoExternalStorage(R.raw.yardik_denizi, "yardik_denizi.mp3");
Uri path= FileProvider.getUriForFile(sansar.this,
"com.example.tunch.trap", new File(Environment.getExternalStorageDirectory() +
"/Android/data/yardik_denizi.mp3"));
Intent shareYardik = new Intent();
shareYardik.setAction(Intent.ACTION_SEND);
shareYardik.putExtra(Intent.EXTRA_TEXT,"Bu ses dosyasını gönderiyorum");
shareYardik.putExtra(Intent.EXTRA_STREAM, path);
shareYardik.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
shareYardik.setType("audio/mp3");
startActivity(Intent.createChooser(shareYardik, "Paylas.."));
And need to create a method to save data in external store.
private void copyFiletoExternalStorage (int resourceId, String resourceName){
String pathSDCard = Environment.getExternalStorageDirectory() + "/Android/data/"
+ resourceName;
try{
InputStream in = getResources().openRawResource(resourceId);
FileOutputStream out = null;
out = new FileOutputStream(pathSDCard);
byte[] buff = new byte[1024];
int read = 0;
try {
while ((read = in.read(buff)) > 0) {
out.write(buff, 0, read);
}
} finally {
in.close();
out.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
I am writing a mobil application which contains Dynamic Report part. I'm making it with Java ItextPdf Library but when I sent it to printer printer don't accept my file and giving a notification "File Type is not supported by this device." But When I send normal pdf file which is created by pc it is printing.
Printing Class
PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
// Set job name, which will be displayed in the print queue
String jobName = " Document";
// Start a print job, passing in a PrintDocumentAdapter implementation
// to handle the generation of a print document
File path = context.getFilesDir();
File file = new File(path,"ss.pdf");
FileOutputStream os = null;
FileInputStream is = null;
try {
os = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
Adisyon a = new Adisyon(os);
a.createFile();
try {
is = new FileInputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
printManager.print(jobName, new printAdapter(Siparis.this,is),
PrintAdapter Class
#TargetApi(Build.VERSION_CODES.KITKAT)
public class printAdapter extends PrintDocumentAdapter
{
Context context;
InputStream input;
public printAdapter(Context context,FileInputStream input)
{
this.context = context;
this.input = input;
}
#Override
public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback){
OutputStream output = null;
try {
output = new FileOutputStream(destination.getFileDescriptor());
byte[] buf = new byte[1024];
int bytesRead;
while ((bytesRead = input.read(buf)) > 0) {
output.write(buf, 0, bytesRead);
}
callback.onWriteFinished(new PageRange[]{PageRange.ALL_PAGES});
} catch (FileNotFoundException ee){
//Catch exception
} catch (Exception e) {
//Catch exception
} finally {
try {
input.close();
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
#Override
public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras){
if (cancellationSignal.isCanceled()) {
callback.onLayoutCancelled();
return;
}
PrintDocumentInfo pdi = new PrintDocumentInfo.Builder("deneme.txt").setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT).build();
callback.onLayoutFinished(pdi, true);
}
}
Itext Class
public class Adisyon {
FileOutputStream stream;
Context appContext = LoginActivity.getContextOfApplication();
public Adisyon(FileOutputStream stream) {
this.stream = stream;
}
public void createFile() {
try {
Document document = new Document();
PdfWriter.getInstance(document, stream);
document.open();
//addMetaData(document);
//addTitlePage(document);
//addContent(document);
createAdisyon(document);
document.close();
} catch (Exception e) {
e.printStackTrace();
}
}
...
I'm downloading a file that is stored on a remote server, I try to decrypt it using JNCryptor, and all goes well except that the file I have downloaded and store in the phone external storage is corrupted and I cannot open it. Can anyone tell me where im going wrong?
Im trying to get the InputStream from the file, decrypt it, and save the file on external storage.
Thanks
Here is my code:
private void downloadFile() {
final String FILE_URL = "https://www.google.com";
final String PASS = "password";
new AsyncTask<Void, Void, Void>() {
#Override
protected Void doInBackground(Void... voids) {
Log.d(TAG, "starting");
JNCryptor cryptor = new AES256JNCryptor();
int count;
try {
URL url = new URL(FILE_URL);
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);
//decrypt istream
byte[] b = null;
byte[] data = null;
try {
b = new byte[input.available()];
input.read(b);
} catch (IOException e) {
Log.i("decrypt error", e.toString());
}
AES256JNCryptorOutputStream cryptorStream = null;
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
try {
cryptorStream = new AES256JNCryptorOutputStream(byteStream,
PASS.toCharArray());
} catch (CryptorException e) {
e.printStackTrace();
}
try {
cryptorStream.write(b);
cryptorStream.flush();
cryptorStream.close();
} catch (IOException e1) {
e1.printStackTrace();
}
byte[] encrypted = byteStream.toByteArray();
try {
data = cryptor.decryptData(encrypted, PASS.toCharArray());
Log.d(TAG, "decrypted");
} catch (InvalidHMACException e) {
e.printStackTrace();
} catch (CryptorException e) {
e.printStackTrace();
}
if (data != null) {
Log.d(TAG, "data is ok");
}
//end decryption
// Output stream
//test
FileOutputStream fos = new FileOutputStream(Environment
.getExternalStorageDirectory().toString()
+ "/temp.zip");
fos.write(data);
fos.close();
Log.d(TAG, "file saved ");
input.close();
Log.d(TAG, "done");
} catch (Exception e) {
Log.d(TAG, "Error: " + e.getMessage());
}
return null;
}
}.execute();
}
P.S. Im not getting any error or warning in logCat.
following is my code,
From Activity class
Intent intent = new Intent(this, DownloadService.class);
// Create a new Messenger for the communication back
Messenger messenger = new Messenger(handler);
intent.putExtra("MESSENGER", messenger);
intent.setData(Uri.parse("http://www.abc.ezy.asia/E-MobApps/op.apk"));
intent.putExtra("urlpath", "http://www.abc.ezy.asia/E-MobApps/op.apk");
startService(intent);
I have overrided Service Class method onHandle Event
// DownloadService Class
#Override
protected void onHandleIntent(Intent intent) {
Uri data = intent.getData();
String urlPath = intent.getStringExtra("urlpath");
String fileName = data.getLastPathSegment();
File output = new File(Environment.getExternalStorageDirectory(),fileName);
if (output.exists()) {
output.delete();
}
InputStream stream = null;
FileOutputStream fos = null;
try {
URL url = new URL(urlPath);
stream = url.openConnection().getInputStream();
fos = new FileOutputStream(output.getPath());
byte dataB[] = new byte[1024];
InputStreamReader reader = new InputStreamReader(stream);
int next = -1;
while ((next = reader.read()) != -1) {
fos.write(next);
}
fos.flush();
result = Activity.RESULT_OK;
} catch (Exception e) {
e.printStackTrace();
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Bundle extras = intent.getExtras();
if (extras != null) {
Messenger messenger = (Messenger) extras.get("MESSENGER");
Message msg = Message.obtain();
msg.arg1 = result;
msg.obj = output.getAbsolutePath();
try {
messenger.send(msg);
} catch (android.os.RemoteException e1) {
Log.w(getClass().getName(), "Exception sending message", e1);
}
}
}
}
In above code I used File Streams & Input stream reader for downloading
when tried to download html file then complete file was downloaded to my sdcard.But when I tried for APK. The File downloaded of 2.2 mb instead of 2.4 mb Parsing problem is there. Kindly help me to resolve the issue.
try this piece of code :
URL url = new URL(fileUrl);
URLConnection connection = url.openConnection();
connection.connect();
int fileLength = connection.getContentLength();
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(output.getPath());
byte data[] = new byte[1024];
int count;
while ((count = input.read(data)) != -1) {
output.write(data, 0, count);
}
output.flush();
input.close();
result = Activity.RESULT_OK;