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Add QrCodeGenerator for QrCode encoding

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Bug: 118794858
Test: RunSettingsRoboTests
Change-Id: I1e27c7b7bf97c1b683be7d200e1f3bbdc763c4c1
This commit is contained in:
Johnson Lu
2018-11-15 17:09:44 +08:00
parent b4dcebec03
commit be878dc06c
2 changed files with 51 additions and 26 deletions
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47
src/com/android/settings/wifi/qrcode/QrCodeGenerator.java Normal file
View File

@@ -0,0 +1,47 @@
/*
* 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;
}
}

30
tests/robotests/src/com/android/settings/wifi/qrcode/QrCameraTest.java
View File

@@ -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;
}
}