Android Open Source - qrcode-android Intents

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MIT License

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/*
 * Copyright (C) 2008 ZXing authors// www.j  ava 2s  .  com
 *
 * 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.google.zxing.client.android;

/**
 * This class provides the constants to use when sending an Intent to Barcode Scanner.
 * These strings are effectively API and cannot be changed.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class Intents
{

    private Intents()
    {
    }

    public static final class Scan
    {

        private static String defaultScanAction = "com.google.zxing.client.android.SCAN";

        /**
         * Send this intent to open the Barcodes app in scanning mode, find a barcode, and return
         * the results.
         */
        public static String ACTION = defaultScanAction;

        /**
         * By default, sending this will decode all barcodes that we understand. However it
         * may be useful to limit scanning to certain formats. Use
         * {@link android.content.Intent#putExtra(String, String)} with one of the values below.
         * <p/>
         * Setting this is effectively shorthand for setting explicit formats with {@link #FORMATS}.
         * It is overridden by that setting.
         */
        public static final String MODE = "SCAN_MODE";

        /**
         * Decode only UPC and EAN barcodes. This is the right choice for shopping apps which get
         * prices, reviews, etc. for products.
         */
        public static final String PRODUCT_MODE = "PRODUCT_MODE";

        /**
         * Decode only 1D barcodes.
         */
        public static final String ONE_D_MODE = "ONE_D_MODE";

        /**
         * Decode only QR codes.
         */
        public static final String QR_CODE_MODE = "QR_CODE_MODE";

        /**
         * Decode only Data Matrix codes.
         */
        public static final String DATA_MATRIX_MODE = "DATA_MATRIX_MODE";

        /**
         * Comma-separated list of formats to scan for. The values must match the names of
         * {@link com.google.zxing.BarcodeFormat}s, e.g. {@link com.google.zxing.BarcodeFormat#EAN_13}.
         * Example: "EAN_13,EAN_8,QR_CODE". This overrides {@link #MODE}.
         */
        public static final String FORMATS = "SCAN_FORMATS";

        /**
         * @see com.google.zxing.DecodeHintType#CHARACTER_SET
         */
        public static final String CHARACTER_SET = "CHARACTER_SET";

        /**
         * Optional parameters to specify the width and height of the scanning rectangle in pixels.
         * The app will try to honor these, but will clamp them to the size of the preview frame.
         * You should specify both or neither, and pass the size as an int.
         */
        public static final String WIDTH = "SCAN_WIDTH";
        public static final String HEIGHT = "SCAN_HEIGHT";

        /**
         * Desired duration in milliseconds for which to pause after a successful scan before
         * returning to the calling intent. Specified as a long, not an integer!
         * For example: 1000L, not 1000.
         */
        public static final String RESULT_DISPLAY_DURATION_MS = "RESULT_DISPLAY_DURATION_MS";

        /**
         * Prompt to show on-screen when scanning by intent. Specified as a {@link String}.
         */
        public static final String PROMPT_MESSAGE = "PROMPT_MESSAGE";

        /**
         * If a barcode is found, Barcodes returns {@link android.app.Activity#RESULT_OK} to
         * {@link android.app.Activity#onActivityResult(int, int, android.content.Intent)}
         * of the app which requested the scan via
         * {@link android.app.Activity#startActivityForResult(android.content.Intent, int)}
         * The barcodes contents can be retrieved with
         * {@link android.content.Intent#getStringExtra(String)}.
         * If the user presses Back, the result code will be {@link android.app.Activity#RESULT_CANCELED}.
         */
        public static final String RESULT = "SCAN_RESULT";

        /**
         * Call {@link android.content.Intent#getStringExtra(String)} with {@link #RESULT_FORMAT}
         * to determine which barcode format was found.
         * See {@link com.google.zxing.BarcodeFormat} for possible values.
         */
        public static final String RESULT_FORMAT = "SCAN_RESULT_FORMAT";

        /**
         * Call {@link android.content.Intent#getStringExtra(String)} with {@link #RESULT_UPC_EAN_EXTENSION}
         * to return the content of any UPC extension barcode that was also found. Only applicable
         * to {@link com.google.zxing.BarcodeFormat#UPC_A} and {@link com.google.zxing.BarcodeFormat#EAN_13}
         * formats.
         */
        public static final String RESULT_UPC_EAN_EXTENSION = "SCAN_RESULT_UPC_EAN_EXTENSION";

        /**
         * Call {@link android.content.Intent#getByteArrayExtra(String)} with {@link #RESULT_BYTES}
         * to get a {@code byte[]} of raw bytes in the barcode, if available.
         */
        public static final String RESULT_BYTES = "SCAN_RESULT_BYTES";

        /**
         * Key for the value of {@link com.google.zxing.ResultMetadataType#ORIENTATION}, if available.
         * Call {@link android.content.Intent#getIntArrayExtra(String)} with {@link #RESULT_ORIENTATION}.
         */
        public static final String RESULT_ORIENTATION = "SCAN_RESULT_ORIENTATION";

        /**
         * Key for the value of {@link com.google.zxing.ResultMetadataType#ERROR_CORRECTION_LEVEL}, if available.
         * Call {@link android.content.Intent#getStringExtra(String)} with {@link #RESULT_ERROR_CORRECTION_LEVEL}.
         */
        public static final String RESULT_ERROR_CORRECTION_LEVEL = "SCAN_RESULT_ERROR_CORRECTION_LEVEL";

        /**
         * Prefix for keys that map to the values of {@link com.google.zxing.ResultMetadataType#BYTE_SEGMENTS},
         * if available. The actual values will be set under a series of keys formed by adding 0, 1, 2, ...
         * to this prefix. So the first byte segment is under key "SCAN_RESULT_BYTE_SEGMENTS_0" for example.
         * Call {@link android.content.Intent#getByteArrayExtra(String)} with these keys.
         */
        public static final String RESULT_BYTE_SEGMENTS_PREFIX = "SCAN_RESULT_BYTE_SEGMENTS_";

        /**
         * Setting this to false will not save scanned codes in the history. Specified as a {@code boolean}.
         */
        public static final String SAVE_HISTORY = "SAVE_HISTORY";

        public static void resetScanAction()
        {
            ACTION = defaultScanAction;
        }
    }
}

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