0d706f0047
ZXing generate QR code with default encoding ISO-8859-1, the generated QR code is wrong encoded if there is a character outside of the charset. Generate QR code of UTF-8 encoding. Bug: 131851854 Test: manual Change-Id: I96a5e72a978c654b62d89b3b11dd3016bf0ee1df
64 lines
2.2 KiB
Java
64 lines
2.2 KiB
Java
/*
|
|
* 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.EncodeHintType;
|
|
import com.google.zxing.MultiFormatWriter;
|
|
import com.google.zxing.WriterException;
|
|
import com.google.zxing.common.BitMatrix;
|
|
|
|
import java.nio.charset.CharsetEncoder;
|
|
import java.nio.charset.StandardCharsets;
|
|
import java.util.HashMap;
|
|
import java.util.Map;
|
|
|
|
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 Map<EncodeHintType, Object> hints = new HashMap<>();
|
|
if (!isIso88591(contents)) {
|
|
hints.put(EncodeHintType.CHARACTER_SET, StandardCharsets.UTF_8.name());
|
|
}
|
|
|
|
final BitMatrix qrBits = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE,
|
|
size, size, hints);
|
|
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;
|
|
}
|
|
|
|
private static boolean isIso88591(String contents) {
|
|
CharsetEncoder encoder = StandardCharsets.ISO_8859_1.newEncoder();
|
|
return encoder.canEncode(contents);
|
|
}
|
|
}
|