- 导入zxing
compile 'com.google.zxing:core:3.3.0'
- 生成bitmap
/**
* 生成二维码
*/
private Bitmap encodeAsBitmap(String contents, BarcodeFormat format, int img_width, int img_height) {
String contentsToEncode = contents;
if (contentsToEncode == null) {
return null;
}
Map<EncodeHintType, Object> hints = new EnumMap<>(EncodeHintType.class);
//hints.put(EncodeHintType.CHARACTER_SET, encoding);
hints.put(EncodeHintType.MARGIN, 0); /* default = 4 */
MultiFormatWriter writer = new MultiFormatWriter();
BitMatrix result;
try {
result = writer.encode(contentsToEncode, format, img_width, img_height, hints);
} catch (Exception e) {
// Unsupported format
e.printStackTrace();
return null;
}
int width = result.getWidth();
int height = result.getHeight();
int[] pixels = new int[width * height];
for (int y = 0; y < height; y++) {
int offset = y * width;
for (int x = 0; x < width; x++) {
pixels[offset + x] = result.get(x, y) ? BLACK : Color.WHITE;
}
}
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
