android QRCode

1.加载静态库和初始化 ImageScanner.

static {System.loadLibrary("iconv");}// net.sourceforge.zbar.ConfigmImageScanner = new ImageScanner();mImageScanner.setConfig(0, Config.X_DENSITY, 3);mImageScanner.setConfig(0, Config.Y_DENSITY, 3);

2.打开Camera设置previewcallback.

try {mCamera.setPreviewDisplay(mSurfaceHolder);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}mCamera.setPreviewCallback(previewCallback);mCamera.startPreview();

3.定义previewcallback.

public Camera.PreviewCallback previewCallback = new Camera.PreviewCallback() {@Overridepublic void onPreviewFrame(byte[] data, Camera camera) {// TODO Auto-generated method stubif (!isPass) {Camera.Parameters parameters = camera.getParameters();Size size = parameters.getPreviewSize();Image barcode = new Image(size.width, size.height, "Y800");barcode.setData(data);int result = mImageScanner.scanImage(barcode);if (result != 0) {String mDecodeQRCode = "";SymbolSet syms = mImageScanner.getResults();for (Symbol sym : syms) {mDecodeQRCode = sym.getData();Log.i("W", "HDMI_Decode--> " + mDecodeQRCode);Toast.makeText(MainActivity.this, "QRCode: " + mDecodeQRCode, Toast.LENGTH_SHORT).show();if (mDecodeQRCode != null && !isPass) {// if (mDecodeQRCode.equals(mCurQR)) {resetCamera();isPass = true;//playSound();// }}break;}}}}};

程序需要用到Zbar.jar。

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