Andriod二维码的生成和保存

来源：互联网发布：召唤师捏脸数据编辑：程序博客网时间：2024/05/17 22:36

前端生成二维码，根据后台的一个支付的url来生成，使用zxing.jar

过程很简单，直接上代码

public class EncodingHandler
{

private static final int BLACK = 0xff000000;
private static final int WHITE = 0xffffffff;
public static Bitmap createQRCode(String str,int widthAndHeight) throws WriterException {
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix matrix = new MultiFormatWriter().encode(str,
BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight);
int width = matrix.getWidth();
int height = matrix.getHeight();
int[] pixels = new int[width * height];

for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (matrix.get(x, y)) {
pixels[y * width + x] = BLACK;
}else{
pixels[y * width + x] = WHITE;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}

}

再一个就是使用了，两行代码搞定

Bitmap qrcodeBitmap = EncodingHandler.createQRCode(payurl, 600);
ivcode.setImageBitmap(qrcodeBitmap);

保存的时候写一个方法

public void saveImage(Context context, Bitmap bmp) {
// 保存文件
File appDir = new File(Environment.getExternalStorageDirectory(), "test");
if (!appDir.exists()) {
appDir.mkdir();
}
// String fileName = System.currentTimeMillis() + ".jpg";
String fileName = "订单"+sorderid + ".jpg";
File file = new File(appDir, fileName);
try {
FileOutputStream fos = new FileOutputStream(file);
bmp.compress(CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
//Toast.makeText(CodePayActivity.this, "保存成功", 0).show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 其次把文件插入到系统图库
try {
MediaStore.Images.Media.insertImage(context.getContentResolver(),
file.getAbsolutePath(), fileName, null);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
// 最后通知图库更新
context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
Toast.makeText(CodePayActivity.this, "保存成功", 0).show();
}

0 0