PDFParser

##PDF parser implements PDFBox-Android API by Tom-Rous and Material File Picker

This readme file gives explanation of the work

PDFParser can read data from the text version PDFs

It reads Meta Data and Contents of the file

Below are the few snapshots of the app

#CODE

public class PDFBoxActivity extends AppCompatActivity {

private ProgressBar mDataProgress;
private Button btnPdf,btnPdfRead;
private TextView PDFtv;
private String  mData;
private TextView mData_tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_pdfbox);

    //grant permission in Android versions higher than Marshmallow
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
        != PackageManager.PERMISSION_GRANTED){
        requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1001);
    }

    //To minimize the parsing time 
    PDFBoxResourceLoader.init(this);
   
   
    btnPdf = (Button)findViewById(R.id.pdf_btn);
    btnPdfRead = (Button)findViewById(R.id.read_pdf_btn);

//Open Material File Picker btnPdf.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { new MaterialFilePicker() .withActivity(PDFBoxActivity.this) .withRequestCode(1000) .withFilter(Pattern.compile(".*\.pdf$")) // Filtering files and directories by file name using regexp // .withFilterDirectories(true) // Set directories filterable (false by default) .withHiddenFiles(true) // Show hidden files and folders .start(); } } );

}

//When File is selected. This method is automatically called @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == 1000 && resultCode == RESULT_OK) {
        final String  filePath = data.getStringExtra(FilePickerActivity.RESULT_FILE_PATH);
        PDFtv.setText("Selected File: "+ filePath);
        btnPdfRead.setOnClickListener(new View.OnClickListener() {
                                          @Override
                                          public void onClick(View v) {
                                              LetsParse(filePath);
                                          }
                                      }
        );
    }
}

//Executes the Async Task on Click

protected void LetsParse(final String filePath){
    PDFtv.setText("Selected File: "+ filePath);
    PDFBoxResourceLoader.init(this);

    new ParsePDFTask().execute(filePath);
    mDataProgress.setVisibility(View.VISIBLE);


}

//Check if permission granted for External Storage

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,@NonNull int[] grantResults) {
    switch (requestCode) {
        case 1001:
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "Permission not Granted", Toast.LENGTH_SHORT).show();
            }
            break;
    }
}

//Async Task to load the Data in background

private class ParsePDFTask extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {
        String filePath = params[0];
        try {
            PDFTextStripper mTextStripper = new PDFTextStripper();
            File file = new File(filePath);
            PDDocument mfile = PDDocument.load(file);

            PDDocumentInformation info = mfile.getDocumentInformation();
            PDDocumentCatalog cat = mfile.getDocumentCatalog();
            PDMetadata metadata = cat.getMetadata();

            mData = " Page Count= " + mfile.getNumberOfPages();
            mData = mData+"\n Title= " + info.getTitle();
            mData = mData+"\n Author= " + info.getAuthor();
            mData = mData+"\n Subject= " + info.getSubject();
            mData = mData+"\n Keywords= " + info.getKeywords();
            mData = mData+"\n Creator= " + info.getCreator();
            mData = mData+"\n Producer= " + info.getProducer();
          //  mData = mData+ "\n Creation Date= " + new SimpleDateFormat("MMM dd,yyyy hh:mm a").format( info.getCreationDate());
          //  mData = mData+ "\n Modification Date= " + new SimpleDateFormat("MMM dd,yyyy hh:mm a").format(info.getModificationDate());
            mData = mData+"\n Trapped= " + info.getTrapped();
            if (metadata != null) {
                mData = mData+ "\n Metadata= " + metadata.getStream();
            }

            mData = mData+ "\n \n \n DATA: \n"+mTextStripper.getText(mfile);
            mfile.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return mData;
    }

    @Override
    protected void onPreExecute() {
        mData_tv.setText("");
        mDataProgress.setVisibility(View.INVISIBLE);
    }

    @Override
    protected void onPostExecute(String mdata) {
        mData_tv.setText(mdata);
        PDFtv.setVisibility(View.GONE);
        btnPdfRead.setVisibility(View.GONE);
        btnPdf.setVisibility(View.GONE);
        mDataProgress.setVisibility(View.GONE);
        mData_tv.setVisibility(View.VISIBLE);
    }
    @Override
    protected void onCancelled() {
        mDataProgress.setVisibility(View.GONE);
    }
}

}