(Android™) Extract PDF from JSON

Demonstrates how to extract a PDF file contained within JSON. The file is represented as a base64 string within the JSON. Note: This example can extract any type of file, not just a PDF file.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// 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);

    CkJsonObject json = new CkJsonObject();

    // Load the JSON.
    boolean success = json.LoadFile("qa_data/json/JSR5U.json");
    if (success != true) {
        Log.i(TAG, json.lastErrorText());
        return;
        }

    // The JSON we loaded contains this:

    // 	{
    // 	...
    // 	...
    // 	  "data": {
    // 	    "content": "JVBERi0xLjQ..."
    // 	  }
    // 	...
    // 	...
    // 	}

    CkStringBuilder sb = new CkStringBuilder();
    json.StringOfSb("data.content",sb);

    CkBinData bd = new CkBinData();
    bd.AppendEncodedSb(sb,"base64");

    success = bd.WriteFile("qa_output/a0015.pdf");

  }

  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."
  }
}