Java tutorial
/* * Geopaparazzi - Digital field mapping on Android based devices * Copyright (C) 2016 HydroloGIS (www.hydrologis.com) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package eu.geopaparazzi.plugins.pdfexport; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.view.View; import android.widget.Button; import android.widget.ProgressBar; import com.itextpdf.text.Anchor; import com.itextpdf.text.Chapter; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Element; import com.itextpdf.text.Paragraph; import com.itextpdf.text.Phrase; import com.itextpdf.text.pdf.PdfPCell; import com.itextpdf.text.pdf.PdfPTable; import com.itextpdf.text.pdf.PdfWriter; import org.json.JSONArray; import org.json.JSONObject; import java.io.File; import java.io.FileOutputStream; import java.util.Date; import java.util.List; import eu.geopaparazzi.core.R; import eu.geopaparazzi.core.database.DaoImages; import eu.geopaparazzi.core.database.DaoNotes; import eu.geopaparazzi.core.database.objects.Note; import eu.geopaparazzi.library.core.ResourcesManager; import eu.geopaparazzi.library.database.GPLog; import eu.geopaparazzi.library.database.Image; import eu.geopaparazzi.library.forms.FormUtilities; import eu.geopaparazzi.library.forms.TagsManager; import eu.geopaparazzi.library.util.TimeUtilities; import eu.geopaparazzi.library.util.Utilities; /** * Dialog for pdf files export. * * @author Andrea Antonello */ public class PdfExportDialogFragment extends DialogFragment { public static final String NODATA = "NODATA"; public static final String PDF_PATH = "exportPath"; public static final String INTERRUPTED = "INTERRUPTED"; private ProgressBar progressBar; private String exportPath; private boolean isInterrupted = false; private AlertDialog alertDialog; private Button positiveButton; /** * Create a dialog instance. * * @param exportPath an optional path to which to export the kmz to. If null, a default path is chosen. * @return the instance. */ public static PdfExportDialogFragment newInstance(String exportPath) { PdfExportDialogFragment f = new PdfExportDialogFragment(); Bundle args = new Bundle(); args.putString(PDF_PATH, exportPath); f.setArguments(args); return f; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); exportPath = getArguments().getString(PDF_PATH); } @Override public Dialog onCreateDialog(Bundle bundle) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); View gpsinfoDialogView = getActivity().getLayoutInflater().inflate(R.layout.fragment_dialog_progressbar, null); builder.setView(gpsinfoDialogView); builder.setMessage(eu.geopaparazzi.plugins.pdfexport.R.string.exporting_data_to_pdf); progressBar = (ProgressBar) gpsinfoDialogView.findViewById(R.id.progressBar); builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { isInterrupted = true; } }); builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { } }); progressBar.setIndeterminate(true); alertDialog = builder.create(); return alertDialog; } private void startExport() { final Context context = getContext(); new AsyncTask<String, Void, String>() { protected String doInBackground(String... params) { File pdfOutputFile = null; try { boolean hasAtLeastOne = false; /* * get notes */ List<Note> notesList = DaoNotes.getNotesList(null, false); if (notesList.size() == 0) { return NODATA; } if (isInterrupted) return INTERRUPTED; File pdfExportDir = ResourcesManager.getInstance(getActivity()).getMainStorageDir(); String filename = ResourcesManager.getInstance(getActivity()).getApplicationName() + "_projectexport_" + TimeUtilities.INSTANCE.TIMESTAMPFORMATTER_LOCAL.format(new Date()) + ".pdf"; pdfOutputFile = new File(pdfExportDir, filename); if (exportPath != null) { pdfOutputFile = new File(exportPath); } // TODO export list to pdf Document document = new Document(); document.setMargins(36, 36, 36, 36); PdfWriter.getInstance(document, new FileOutputStream(pdfOutputFile)); document.open(); document.addTitle("Geopaparazzi PDF Export"); document.addSubject("Geopaparazzi PDF Export"); document.addKeywords("geopaparazzi, export, notes"); document.addAuthor("Geopaparazzi User"); document.addCreator("Geopaparazzi - http://www.geopaparazzi.eu"); int index = 1; for (Note note : notesList) { processNote(document, note, index++); } document.close(); return pdfOutputFile.getAbsolutePath(); } catch (Exception e) { // cleanup as it might be inconsistent if (pdfOutputFile != null && pdfOutputFile.exists()) { pdfOutputFile.delete(); } GPLog.error(this, e.getLocalizedMessage(), e); e.printStackTrace(); return ""; //$NON-NLS-1$ } } protected void onPostExecute(String response) { // on UI thread! progressBar.setVisibility(View.GONE); if (response.equals(NODATA)) { String msg = context.getString(R.string.no_data_found_in_project_to_export); alertDialog.setMessage(msg); } else if (response.equals(INTERRUPTED)) { alertDialog.setMessage(context.getString(R.string.interrupted_by_user)); } else if (response.length() > 0) { String msg = context.getString(R.string.datasaved) + " " + response; alertDialog.setMessage(msg); } else { String msg = context.getString(R.string.data_nonsaved); alertDialog.setMessage(msg); } if (positiveButton != null) positiveButton.setEnabled(true); } }.execute((String) null); } public void processNote(Document document, Note note, int count) throws Exception { String name = Utilities.makeXmlSafe(note.getName()); String form = note.getForm(); DaoImages daoImages = new DaoImages(); if (form != null && form.length() > 0) { JSONObject sectionObject = new JSONObject(form); if (!sectionObject.has(FormUtilities.ATTR_SECTIONNAME)) { return; } String sectionName = sectionObject.getString(FormUtilities.ATTR_SECTIONNAME); Anchor anchor = new Anchor(sectionName); anchor.setName(sectionName); Chapter currentChapter = new Chapter(new Paragraph(anchor), count); addEmptyLine(currentChapter, 3); PdfPTable infoTable = new PdfPTable(2); infoTable.setHeaderRows(0); infoTable.setWidthPercentage(90); currentChapter.add(infoTable); addKeyValueToTableRow(infoTable, "Timestamp", new Date(note.getTimeStamp()).toString()); addKeyValueToTableRow(infoTable, "Latitude", note.getLat() + ""); addKeyValueToTableRow(infoTable, "Longitude", note.getLon() + ""); addEmptyLine(currentChapter, 3); List<String> formsNames = TagsManager.getFormNames4Section(sectionObject); for (String formName : formsNames) { Paragraph section = new Paragraph(formName); currentChapter.addSection(section); addEmptyLine(currentChapter, 3); PdfPTable currentTable = new PdfPTable(2); currentTable.setHeaderRows(1); currentTable.setWidthPercentage(90); currentChapter.add(currentTable); JSONObject form4Name = TagsManager.getForm4Name(formName, sectionObject); JSONArray formItems = TagsManager.getFormItems(form4Name); for (int i = 0; i < formItems.length(); i++) { JSONObject formItem = formItems.getJSONObject(i); if (!formItem.has(FormUtilities.TAG_KEY)) { continue; } String type = formItem.getString(FormUtilities.TAG_TYPE); String key = formItem.getString(FormUtilities.TAG_KEY); String value = formItem.getString(FormUtilities.TAG_VALUE); String label = key; if (formItem.has(FormUtilities.TAG_LABEL)) { label = formItem.getString(FormUtilities.TAG_LABEL); } if (type.equals(FormUtilities.TYPE_PICTURES)) { if (value.trim().length() == 0) { continue; } String[] imageIdsSplit = value.split(Note.IMAGES_SEPARATOR); for (String imageId : imageIdsSplit) { Image image = daoImages.getImage(Long.parseLong(imageId)); String imgName = image.getName(); byte[] imageData = daoImages.getImageData(Long.parseLong(imageId)); com.itextpdf.text.Image itextImage = com.itextpdf.text.Image.getInstance(imageData); Paragraph caption = new Paragraph(imgName); caption.setAlignment(Element.ALIGN_CENTER); PdfPCell keyCell = new PdfPCell(new Phrase(label)); keyCell.setHorizontalAlignment(Element.ALIGN_CENTER); keyCell.setVerticalAlignment(Element.ALIGN_MIDDLE); keyCell.setPadding(10); currentTable.addCell(keyCell); PdfPCell valueCell = new PdfPCell(); valueCell.setHorizontalAlignment(Element.ALIGN_CENTER); valueCell.setVerticalAlignment(Element.ALIGN_MIDDLE); valueCell.setPadding(10); valueCell.addElement(itextImage); valueCell.addElement(caption); currentTable.addCell(valueCell); } } else if (type.equals(FormUtilities.TYPE_MAP)) { if (value.trim().length() == 0) { continue; } String imageId = value.trim(); Image image = daoImages.getImage(Long.parseLong(imageId)); String imgName = image.getName(); byte[] imageData = daoImages.getImageData(Long.parseLong(imageId)); com.itextpdf.text.Image itextImage = com.itextpdf.text.Image.getInstance(imageData); Paragraph caption = new Paragraph(imgName); caption.setAlignment(Element.ALIGN_CENTER); PdfPCell keyCell = new PdfPCell(new Phrase(label)); keyCell.setHorizontalAlignment(Element.ALIGN_CENTER); keyCell.setVerticalAlignment(Element.ALIGN_MIDDLE); keyCell.setPadding(10); currentTable.addCell(keyCell); PdfPCell valueCell = new PdfPCell(); valueCell.setHorizontalAlignment(Element.ALIGN_CENTER); valueCell.setVerticalAlignment(Element.ALIGN_MIDDLE); valueCell.setPadding(10); valueCell.addElement(itextImage); valueCell.addElement(caption); currentTable.addCell(valueCell); } else if (type.equals(FormUtilities.TYPE_SKETCH)) { if (value.trim().length() == 0) { continue; } String[] imageIdsSplit = value.split(Note.IMAGES_SEPARATOR); for (String imageId : imageIdsSplit) { Image image = daoImages.getImage(Long.parseLong(imageId)); String imgName = image.getName(); byte[] imageData = daoImages.getImageData(Long.parseLong(imageId)); com.itextpdf.text.Image itextImage = com.itextpdf.text.Image.getInstance(imageData); Paragraph caption = new Paragraph(imgName); caption.setAlignment(Element.ALIGN_CENTER); PdfPCell keyCell = new PdfPCell(new Phrase(label)); keyCell.setHorizontalAlignment(Element.ALIGN_CENTER); keyCell.setVerticalAlignment(Element.ALIGN_MIDDLE); keyCell.setPadding(10); currentTable.addCell(keyCell); PdfPCell valueCell = new PdfPCell(); valueCell.setHorizontalAlignment(Element.ALIGN_CENTER); valueCell.setVerticalAlignment(Element.ALIGN_MIDDLE); valueCell.setPadding(10); valueCell.addElement(itextImage); valueCell.addElement(caption); currentTable.addCell(valueCell); } } else { addKeyValueToTableRow(currentTable, label, value); } } } document.add(currentChapter); document.newPage(); } } private void addKeyValueToTableRow(PdfPTable table, String key, String value) { PdfPCell keyCell = new PdfPCell(new Phrase(key)); keyCell.setHorizontalAlignment(Element.ALIGN_CENTER); keyCell.setVerticalAlignment(Element.ALIGN_MIDDLE); keyCell.setPadding(10); table.addCell(keyCell); PdfPCell valueCell = new PdfPCell(new Phrase(value)); valueCell.setHorizontalAlignment(Element.ALIGN_CENTER); valueCell.setVerticalAlignment(Element.ALIGN_MIDDLE); valueCell.setPadding(10); table.addCell(valueCell); } public void addEmptyLine(Chapter element, int number) throws DocumentException { for (int i = 0; i < number; i++) { Paragraph p = new Paragraph(" "); element.add(p); } } public void onStart() { super.onStart(); AlertDialog d = (AlertDialog) getDialog(); if (d != null) { positiveButton = d.getButton(Dialog.BUTTON_POSITIVE); positiveButton.setEnabled(false); } startExport(); } @Override public void onDetach() { super.onDetach(); } }