Android™

Test if an Email Header Matches a Pattern

Demonstrates the Chilkat Email.HasHeaderMatching method, which returns true when the email contains a header field named by the first argument whose value matches the wildcard pattern in the second argument. The third argument selects case-sensitive matching. This example checks whether the Subject contains the word "invoice".

Background: The value pattern supports wildcards — * matches any run of characters — so *invoice* matches any subject containing "invoice" anywhere. This is a compact way to classify or filter messages by header content, for example routing billing mail or flagging automated notices, without manually fetching the header value and testing it yourself.

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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);

    //  Demonstrates the HasHeaderMatching method, which returns true when the email contains a
    //  header field named by the first argument whose value matches the wildcard pattern in the second argument.  The third argument selects
    //  case-sensitive matching.

    CkEmail email = new CkEmail();
    email.put_Subject("Monthly invoice #4432");
    email.put_From("billing@example.com");

    //  Check whether the Subject header value matches a wildcard pattern (case-insensitive).
    boolean match = email.HasHeaderMatching("Subject","*invoice*",false);

    if (match == true) {
        Log.i(TAG, "The Subject header contains 'invoice'.");
        }
    else {
        Log.i(TAG, "The Subject header does not contain 'invoice'.");
        }


  }

  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."
  }
}