Android™ Requires Chilkat v11.7.0+

Replace PDF Text on Selected Pages Only

See more PDF Text Replacement Examples

Demonstrates the "pages" option, which limits the search for placeholders and labels to the given pages: "all" (the default), "first", "last", "odd", "even", or a list such as "1,3,5-9". The two-page order confirmation carries the same "Status:" label on both pages; the status is changed on page 2 only, then on both pages. Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  The PDF used in this example is available at order_confirmation.pdf

    CkPdf pdf = new CkPdf();
    success = pdf.LoadFile("qa_data/pdf/order_confirmation.pdf");
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        return;
        }

    CkJsonObject json = new CkJsonObject();
    CkJsonObject jsonOut = new CkJsonObject();

    //  Both pages have "Status:   Pending".  With pages "2", only page 2 is searched.
    json.UpdateString("pages","2");
    json.UpdateString("labels[0].label","Status:");
    json.UpdateString("labels[0].value","Shipped");
    success = pdf.TextReplace("check",json,jsonOut);
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        return;
        }

    Log.i(TAG, "pages 2: found on page(s) " + jsonOut.stringOf("replacements[0].pages"));

    //  With every page searched, the default occurrence ("first") still replaces one -- the first in reading order.
    json.UpdateString("pages","all");
    success = pdf.TextReplace("check",json,jsonOut);
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        return;
        }

    Log.i(TAG, "pages all, first occurrence: found on page(s) " + jsonOut.stringOf("replacements[0].pages"));

    //  Every occurrence on every page.
    json.UpdateString("labels[0].occurrence","all");
    success = pdf.TextReplace("apply",json,jsonOut);
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        return;
        }

    Log.i(TAG, "pages all, every occurrence: " + String.valueOf(jsonOut.IntOf("replacements[0].count")) + " replaced on page(s) " + jsonOut.stringOf("replacements[0].pages"));

    success = pdf.WriteFile("qa_output/order_shipped.pdf");
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        return;
        }

    //  Sample output:

    //  pages 2: found on page(s) 2
    //  pages all, first occurrence: found on page(s) 1
    //  pages all, every occurrence: 2 replaced on page(s) 1,2

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}