(Android™) Download a Specific GMail Message into a Chilkat Email Object

Demonstrates how to download a GMail message into a Chilkat Email object.

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);

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

    boolean success;

    CkHttp http = new CkHttp();
    http.put_AuthToken("GMAIL-ACCESS-TOKEN");

    // The id of the GMail message to download.
    String id = "166e50fed0b9b0cb";
    String userId = "me";

    http.SetUrlVar("userId","me");
    http.SetUrlVar("id",id);

    // Fetch the email.
    String url = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/{$id}?format=raw";
    CkStringBuilder sbJson = new CkStringBuilder();
    success = http.DownloadSb(url,"utf-8",sbJson);
    if (success != true) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    CkJsonObject json = new CkJsonObject();
    json.LoadSb(sbJson);
    json.put_EmitCompact(false);

    if (http.get_LastStatus() != 200) {
        Log.i(TAG, json.emit());
        Log.i(TAG, "Failed.");
        return;
        }

    // The returned JSON contains something like this:

    // {
    //   "id": "166e50fed0b9b0cb",
    //   "threadId": "166e50fed0b9b0cb",
    //   "labelIds": [
    //     "CATEGORY_SOCIAL",
    //     "INBOX"
    //   ],
    //   "snippet": "...",
    //   "historyId": "582477",
    //   "internalDate": "1541441317000",
    //   "sizeEstimate": 28603,
    //   "raw": "BASE64URL_CONTENT"
    // }

    // The RFC822 MIME of the email is contained in the "raw" as a base64URL encoded string.
    // Let's decode and load into a Chilkat email object..
    CkStringBuilder sbRaw = new CkStringBuilder();
    json.StringOfSb("raw",sbRaw);
    sbRaw.Decode("base64url","utf-8");

    CkEmail email = new CkEmail();
    email.SetFromMimeSb(sbRaw);

    // Now we can use the email API to do whatever we desire..
    Log.i(TAG, "From: " + email.fromAddress());
    Log.i(TAG, "Subject: " + email.subject());
    // ...

  }

  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."
  }
}