flyrunlx 2017-01-10
前提:
本文使用了ButterKnife依赖库
开始环境:AndroidStudio
在Module文件夹下的build.gradle文件中追加zxing依赖:
compile 'com.google.zxing:core:3.3.0'
之后添加图片长按事件(此处使用了ButterKnife的注解),并实现识别二维码的功能:
@OnLongClick({R.id.imageView}) public boolean btnLongClick(final ImageView iv) { Logger.info(TAG, "Long click on image"); new AlertDialog.Builder(getActivity()) .setPositiveButton(R.string.recognize_qr_code, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { progressBar.setVisibility(View.VISIBLE); Bitmap obmp = ((BitmapDrawable) (iv.getDrawable())).getBitmap(); int width = obmp.getWidth(); int height = obmp.getHeight(); int[] data = new int[width * height]; obmp.getPixels(data, 0, width, 0, 0, width, height); RGBLuminanceSource source = new RGBLuminanceSource(width, height, data); BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); new QrCodeAsyncTask().execute(bitmap); } }).show(); return true; } class QrCodeAsyncTask extends AsyncTask<BinaryBitmap, Void, Result> { @Override protected Result doInBackground(BinaryBitmap... params) { QRCodeReader reader = new QRCodeReader(); Result result = null; try { result = reader.decode(params[0]); } catch (NotFoundException e) { e.printStackTrace(); } catch (ChecksumException e) { e.printStackTrace(); } catch (FormatException e) { e.printStackTrace(); } return result; } @Override protected void onPostExecute(Result result) { super.onPostExecute(result); progressBar.setVisibility(View.GONE); String text = result.getText(); Logger.info(TAG, "QR CODE: " + text); Toast.makeText(getActivity(), text, Toast.LENGTH_SHORT).show(); } }