Zxing
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This document discusses barcodes and QR codes. It provides information on ZXing, an open-source barcode scanning library for Android. It details how QR codes are used for mobile tagging and information carriers. The document also describes how to embed barcode scanning via intents in an Android app using the ZXing library and handling the results. It notes there is more to explore in the barcode scanning code.
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- 1. ZXingMulti-format 1D/2D barcode image processing library with clients for Android, JavaThis is Harrys learning material about barcode, which he knew nothing about before
- 2. Its all about QR codeFirst created in Japan, 1994. used for tracking parts in vehicle manufacturingUsage nowadayscommercial trackingmobile taggingRole information carrierText based info, including URL, contact info etc.
- 3. Mobile TaggingURL Contact informationSMSTextEven MORE to come..NOTE: Microsoft Tag is more creative, it is even colorful tagging!!!
- 4. Barcode Scanner(from ZXing team)Project hosting http://code.google.com/p/zxing/How to useCall via Intent(if barcode scanner is installed) -- easyCall via Intent(if not installed, link to the apps URL to Android Market)--easyEmbedding in your own app(applicable but not easy)
- 5. Consistent UI There are 2 types of UI, which need to be modified in order to have consistent UIScan UIViewFinderView.javaResult UIShould be a customized UI
- 6. Embedding call - 1public final Button.OnClickListenermScanQRCode = new Button.OnClickListener() {public void onClick(View v) { Intent intent = new Intent("com.google.zxing.client.android.SCAN");intent.putExtra("SCAN_MODE", "QR_CODE_MODE");startActivityForResult(intent, 0);}};
- 7. Embedding call - 2@Overridepublic void onActivityResult(intrequestCode, intresultCode, Intent intent) {if (requestCode == 0) {if (resultCode == RESULT_OK) { String contents = intent.getStringExtra("SCAN_RESULT"); String format = intent.getStringExtra("SCAN_RESULT_FORMAT");showDialog(R.string.result_succeeded, "Format: " + format + "\nContents: " + contents); } else if (resultCode == RESULT_CANCELED) {showDialog(R.string.result_failed, getString(R.string.result_failed_why));}}}
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