Android™

Get the Content-Location of a Related Item

Demonstrates the Chilkat Email.GetRelatedContentLocation method, which returns the Content-Location of a related item (typically an image or style sheet embedded within an HTML email). The index is zero-based. This example loads an image from a file into a BinData object and adds it as a related item addressed by Content-Location using AddRelatedBd2, then reads it back.

Background: Content-Location is the alternative to Content-ID for linking HTML to its embedded resources. Instead of a cid: reference, the HTML keeps an ordinary-looking src="logo.png", and the matching part carries a Content-Location of logo.png. Since the image is binary, it is loaded into a BinData object and added with AddRelatedBd2. This approach is common when an existing web page is turned into an email, since the original relative URLs can stay unchanged.

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// 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;

    //  Demonstrates the GetRelatedContentLocation method, which returns the Content-Location of
    //  a related item.  Related items are typically images and style sheets embedded within
    //  HTML emails.  The index is zero-based.

    CkEmail email = new CkEmail();
    email.put_Subject("GetRelatedContentLocation example");

    //  The HTML references the image by the same name used as the Content-Location.
    email.SetHtmlBody("<html><body><img src=\"logo.png\"/></body></html>");

    //  Load the image data from a file into a BinData object.
    CkBinData bdImage = new CkBinData();
    success = bdImage.LoadFile("qa_data/images/logo.png");
    if (success == false) {
        Log.i(TAG, bdImage.lastErrorText());
        return true;
        }

    //  Add the image as a related item addressed by Content-Location "logo.png".
    success = email.AddRelatedBd2(bdImage,"logo.png");
    if (success == false) {
        Log.i(TAG, email.lastErrorText());
        return true;
        }

    //  Read the Content-Location of the first related item (index 0).
    String loc = email.getRelatedContentLocation(0);
    Log.i(TAG, "Related item 0 Content-Location: " + loc);

    //  Note: The path "qa_data/images/logo.png" is a relative local filesystem path,
    //  relative to the current working directory of the running application.

  }

  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."
  }
}