Android中生成二维码、扫描二维码并返回结果进行处理

1.根据传入的字符串生成二维码

private Bitmap createQRImage(String downloadurl)
{
try {

BitMatrix bitMatrix = new QRCodeWriter().encode(downloadurl,
BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT);
int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
// 下面这里按照二维码的算法，逐个生成二维码的图片，
// 两个for循环是图片横列扫描的结果
for (int y = 0; y < QR_HEIGHT; y++) {
for (int x = 0; x < QR_WIDTH; x++) {
if (bitMatrix.get(x, y)) {
pixels[y * QR_WIDTH + x] = 0xff000000;
} else {
pixels[y * QR_WIDTH + x] = 0xffffffff;
}
}
}
// 生成二维码图片的格式，使用ARGB_8888
Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
return bitmap;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

public void handleDecode(Result result, Bitmap barcode) {
inactivityTimer.onActivity();
playBeepSoundAndVibrate();
String resultString = result.getText();
// FIXME
if (resultString.equals("")) {
Toast.makeText(CaptureActivity.this, "Scan failed!",             Toast.LENGTH_SHORT).show();
} else {
Intent resultIntent = new Intent();
resultIntent.putExtra("result", resultString);
setResult(250, resultIntent);
}
CaptureActivity.this.finish();
}

3.界面截图

4.Demo下载地址