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Commit be878dc0 authored by Johnson Lu's avatar Johnson Lu
Browse files

Add QrCodeGenerator for QrCode encoding 

Bug: 118794858
Test: RunSettingsRoboTests
Change-Id: I1e27c7b7bf97c1b683be7d200e1f3bbdc763c4c1
parent b4dcebec

src/com/android/settings/wifi/qrcode/QrCodeGenerator.java

0 → 100644
+47 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2018 The Android Open Source Project

 *

 * 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.android.settings.wifi.qrcode;



import android.graphics.Bitmap;

import android.graphics.Color;



import com.google.zxing.BarcodeFormat;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.WriterException;

import com.google.zxing.common.BitMatrix;



public final class QrCodeGenerator {

    /**

     * Generates a barcode image with {@code contents}.

     *

     * @param contents The contents to encode in the barcode

     * @param size     The preferred image size in pixels

     * @return Barcode bitmap

     */

    public static Bitmap encodeQrCode(String contents, int size)

            throws WriterException, IllegalArgumentException {

        final BitMatrix qrBits = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE,

                size, size);

        final Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.RGB_565);

        for (int x = 0; x < size; x++) {

            for (int y = 0; y < size; y++) {

                bitmap.setPixel(x, y, qrBits.get(x, y) ? Color.BLACK : Color.WHITE);

            }

        }

        return bitmap;

    }

}

tests/robotests/src/com/android/settings/wifi/qrcode/QrCameraTest.java

+4 −26
Original line number Diff line number Diff line
@@ -30,13 +30,10 @@ import android.view.SurfaceHolder; 
import com.android.settings.R;

import com.android.settings.testutils.SettingsRobolectricTestRunner;



import com.google.zxing.BarcodeFormat;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.LuminanceSource;

import com.google.zxing.RGBLuminanceSource;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.WriterException;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.common.HybridBinarizer;



import java.util.concurrent.CountDownLatch;
@@ -111,36 +108,17 @@ public class QrCameraTest { 
        final String googleUrl = "http://www.google.com";



        try {

            Bitmap bmp = encodeQrCode(googleUrl, 320);

            int[] intArray = new int[bmp.getWidth() * bmp.getHeight()];

            final Bitmap bmp = QrCodeGenerator.encodeQrCode(googleUrl, 320);

            final int[] intArray = new int[bmp.getWidth() * bmp.getHeight()];

            bmp.getPixels(intArray, 0, bmp.getWidth(), 0, 0, bmp.getWidth(), bmp.getHeight());

            LuminanceSource source = new RGBLuminanceSource(bmp.getWidth(), bmp.getHeight(),

                    intArray);



            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

            final BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

            mCamera.decodeImage(bitmap);

            bmp.recycle();

        } catch (WriterException e) {

        }



        assertThat(mQrCode).isEqualTo(googleUrl);

    }



    private Bitmap encodeQrCode(String qrCode, int size) throws WriterException {

        BitMatrix qrBits = null;

        try {

            qrBits =

                    new MultiFormatWriter().encode(qrCode, BarcodeFormat.QR_CODE, size, size, null);

        } catch (IllegalArgumentException iae) {

            // Should never reach here.

        }

        assertThat(qrBits).isNotNull();



        Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.RGB_565);

        for (int x = 0; x < size; ++x) {

            for (int y = 0; y < size; ++y) {

                bitmap.setPixel(x, y, qrBits.get(x, y) ? Color.BLACK : Color.WHITE);

            }

        }

        return bitmap;

    }

}