BarcodeScannerIntegrator.java

/*
 * Copyright 2009 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.markupartist.sthlmtraveling.utils;

import android.app.AlertDialog;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;

/**
 * <p>A utility class which helps ease integration with Barcode Scanner via {@link Intent}s. This 
 * is a simple way to invoke barcode scanning.</p>
 *
 * <h2>Sharing text via barcode</h2>
 *
 * <p>To share text, encoded as a QR Code on-screen, similarly, see {@link #shareText(Activity, String)}.</p>
 *
 * <p>Some code, particularly download integration, was contributed from the Anobiit application.</p>
 * 
 * <h3>Note</h3>
 * 
 * <p>This is a simple stripped version of the IntentIntegrator from the 
 * ZXing project {@link http://zxing.googlecode.com}.</p>
 *
 * @author Sean Owen
 * @author Fred Lin
 * @author Isaac Potoczny-Jones
 */
public final class BarcodeScannerIntegrator {

  private BarcodeScannerIntegrator() {
  }

  private static void showDownloadDialog(final Activity activity,
                                         String stringTitle,
                                         String stringMessage,
                                         String stringButtonYes,
                                         String stringButtonNo) {
    AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
    downloadDialog.setTitle(stringTitle);
    downloadDialog.setMessage(stringMessage);
    downloadDialog.setPositiveButton(stringButtonYes, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialogInterface, int i) {
        Uri uri = Uri.parse("market://search?q=pname:com.google.zxing.client.android");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        activity.startActivity(intent);
      }
    });
    downloadDialog.setNegativeButton(stringButtonNo, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialogInterface, int i) {}
    });
    downloadDialog.show();
  }

  /**
   * Shares the given text by encoding it as a barcode, such that another user can
   * scan the text off the screen of the device.
   *
   * @param text the text string to encode as a barcode
   * @param stringTitle title of dialog prompting user to download Barcode Scanner
   * @param stringMessage text of dialog prompting user to download Barcode Scanner
   * @param stringButtonYes text of button user clicks when agreeing to download
   *  Barcode Scanner (e.g. "Yes")
   * @param stringButtonNo text of button user clicks when declining to download
   *  Barcode Scanner (e.g. "No")
   */
  public static void shareText(Activity activity,
                               String text,
                               int stringTitle,
                               int stringMessage,
                               int stringButtonYes,
                               int stringButtonNo) {

    Intent intent = new Intent();
    intent.setAction("com.google.zxing.client.android.ENCODE");
    intent.putExtra("ENCODE_TYPE", "TEXT_TYPE");
    intent.putExtra("ENCODE_DATA", text);
    //intent.putExtra("com.google.zxing.client.android.ENCODE_FORMAT", "QR_CODE"); 
    try {
      activity.startActivity(intent);
    } catch (ActivityNotFoundException e) {
      showDownloadDialog(activity, 
              activity.getString(stringTitle), 
              activity.getString(stringMessage), 
              activity.getString(stringButtonYes), 
              activity.getString(stringButtonNo));
    }
  }

}