CODEWITHSUNDEEP
androidfirebasefirebase-storagepdf-viewer
Teodora Mustea
Teodora Mustea

Reputation: 63

How to use pdfviewer to Display PDF from Firebase in Android Studio

I am making an app that lets the user upload PDF files and then I save them to Firebase. Now I'm trying to display them in my app, I don't want to let the user download the file, but I want it to be displayed directly in the app.

This is how I save the files: 

private void uploadFile() {
    progressBar.setVisibility(View.VISIBLE);

    StorageReference sRef = mStorageReference.child(Constants.STORAGE_PATH_COURSES + System.currentTimeMillis() + ".pdf");
    sRef.putFile(filepath)
            .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @SuppressWarnings("VisibleForTests")
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                    progressBar.setVisibility(View.GONE);
                    textViewStatus.setText("File Uploaded Successfully");

                    Course upload = new Course(editTextFilename.getText().toString(), taskSnapshot.getDownloadUrl().toString());
                    mDatabaseReference.child(mDatabaseReference.push().getKey()).setValue(upload);
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception exception) {
                    Toast.makeText(getApplicationContext(), exception.getMessage(), Toast.LENGTH_LONG).show();
                }
            })
            .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                @SuppressWarnings("VisibleForTests")
                @Override
                public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                    double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();
                    textViewStatus.setText((int) progress + "% Uploading...");
                }
            });

}

I searched for the possibilities and tried a few but I can not make them work.

I tried to use this, but it displays nothing. https://github.com/barteksc/AndroidPdfViewer

 pdfView=(PDFView) findViewById(R.id.pdfView);

    Bundle bundle = getIntent().getExtras();
    if (bundle != null) {
        url = getIntent().getStringExtra("url");
    }
    uri=Uri.parse(url);
   pdfView.fromUri(uri).load();

If I load the pdf from the assets folder, it works well.

I've also tried the webview:

    WebView webview = (WebView) findViewById(R.id.webview);
    webview.getSettings().setJavaScriptEnabled(true);
    webview.loadUrl("http://drive.google.com/viewerng/viewer?embedded=true&url=" + url)

I'm really new to Android and I'm sure that I do something wrong...I would be really grateful if someone could help me. Thanks!

Upvotes: 3

Views: 10307

Answers (5)

Adnan Bashir
Adnan Bashir

Reputation: 763

after searching and retry different codes i found the solution . view pdf file without downloading in device

Library for pdf view is

implementation 'com.github.barteksc:android-pdf-viewer:2.8.2'

Add in XML

 <com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfview"
        android:background="@color/white"

        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

and This is java code

 StorageReference storageRef;
        FirebaseApp app;
        FirebaseStorage storage;
        storageRef = FirebaseStorage.getInstance().getReference();
        app = FirebaseApp.getInstance();
        storage = FirebaseStorage.getInstance(app);
        storageRef = storage.getReference().child("books/booksPDF/documenttcv.pdf");

        storageRef.getStream().addOnSuccessListener(new OnSuccessListener<StreamDownloadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(StreamDownloadTask.TaskSnapshot taskSnapshot) {
                
                pdfview.fromStream(taskSnapshot.getStream()).load();
            }
        }).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Toast.makeText(ReadBookActivity.this, "Fail :"+e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });

NOTE : When you save pdf file programaticaly in firbase storage then you need to keep the name of file insted of url , because you retrieve files by using name no url

Upvotes: 1

amr eshak
amr eshak

Reputation: 31

This one works, too.
This is from Firebase Doc website: 

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    // Write a message to the database
    pdfView = (PDFView) findViewById(R.id.pdfView);
    mFirebaseStorage=FirebaseStorage.getInstance();
    mmFirebaseStorageRef=mFirebaseStorage.getReference().child("sources");
    final long ONE_MEGABYTE = 1024 * 1024;

    mmFirebaseStorageRef.child("smpl.pdf").getBytes(ONE_MEGABYTE).addOnSuccessListener(new OnSuccessListener<byte[]>() {
        @Override
        public void onSuccess(byte[] bytes) {
     pdfView.fromBytes(bytes).load();
        }
    }).addOnFailureListener(new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception e) {
            Toast.makeText(MainActivity.this,"download unsuccessful",Toast.LENGTH_LONG).show();
        }
    });
}

Upvotes: 1

Teodora Mustea
Teodora Mustea

Reputation: 63

I finally succeeded using PDFViewer. Here is my code:

    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_course);

    pdfView=(PDFView) findViewById(R.id.pdfView);

    Bundle bundle = getIntent().getExtras();
    if (bundle != null) {
        url = getIntent().getStringExtra("url");
    }
    new RetrievePDFStream().execute(url);
}


class RetrievePDFStream extends AsyncTask<String,Void,InputStream>{
    @Override
    protected InputStream doInBackground(String... strings) {
        InputStream inputStream=null;

        try{

            URL urlx=new URL(strings[0]);
            HttpURLConnection urlConnection=(HttpURLConnection) urlx.openConnection();
            if(urlConnection.getResponseCode()==200){
                inputStream=new BufferedInputStream(urlConnection.getInputStream());

            }
        }catch (IOException e){
            return null;
        }
        return inputStream;

    }

    @Override
    protected void onPostExecute(InputStream inputStream) {
        pdfView.fromStream(inputStream).load();
    }
}

This really helped: https://www.youtube.com/watch?v=-Ld1IoOF_uk

Upvotes: 3

Eselfar
Eselfar

Reputation: 3869

I'm not using Firebase but my PDF is stored on a server. I call the server using Retrofit to download the PDF as a Stream. Then I give the Stream to pdf Viewer

To display the PDF

private void displayPDF(InputStream stream) {
    mPdfView.fromStream(stream)
            .defaultPage(0)
            .load();
}

Retrofit Service

@Streaming
@GET
Call<ResponseBody> downloadPDF(@Url String url);

In Retrofit response

displayPDF(responseBody.byteStream());

Upvotes: 1

Burhanuddin Rashid
Burhanuddin Rashid

Reputation: 5370

AndroidPdfViewer library supports loading PDF file from local storage not from remote url.Since your are trying to load remote link it wont show anything.You need to download your pdf file in app cache and load it from that path

WebView will work fine in this situation because its loading a remote url in a browser

You can refer the following Issue HERE

Upvotes: 2

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