Android library projects that provides easy to use and extensible Barcode Scanner views based on ZXing and ZBar.
Version 1.8.4 introduces a couple of new changes:
- Open Camera and handle preview frames in a separate HandlerThread (#1, #99): Though this has worked fine in my testing on 3 devices, I would advise you to test on your own devices before blindly releasing apps with this version. If you run into any issues please file a bug report.
- Do not automatically stopCamera after a result is found #115: This means that upon a successful scan only the cameraPreview is stopped but the camera is not released. So previously if your code was calling mScannerView.startCamera() in the handleResult() method, please replace that with a call to mScannerView.resumeCameraPreview(this);
Add the following dependency to your build.gradle file.
compile 'me.dm7.barcodescanner:zxing:1.9.3'
1.) Add camera permission to your AndroidManifest.xml file:
<uses-permission android:name="android.permission.CAMERA" />2.) A very basic activity would look like this:
public class SimpleScannerActivity extends Activity implements ZXingScannerView.ResultHandler {
private ZXingScannerView mScannerView;
@Override
public void onCreate(Bundle state) {
super.onCreate(state);
mScannerView = new ZXingScannerView(this); // Programmatically initialize the scanner view
setContentView(mScannerView); // Set the scanner view as the content view
}
@Override
public void onResume() {
super.onResume();
mScannerView.setResultHandler(this); // Register ourselves as a handler for scan results.
mScannerView.startCamera(); // Start camera on resume
}
@Override
public void onPause() {
super.onPause();
mScannerView.stopCamera(); // Stop camera on pause
}
@Override
public void handleResult(Result rawResult) {
// Do something with the result here
Log.v(TAG, rawResult.getText()); // Prints scan results
Log.v(TAG, rawResult.getBarcodeFormat().toString()); // Prints the scan format (qrcode, pdf417 etc.)
// If you would like to resume scanning, call this method below:
mScannerView.resumeCameraPreview(this);
}
}Please take a look at the [zxing-sample] (https://github.com/dm77/barcodescanner/tree/master/zxing-sample) project for a full working example.
Take a look at the [ScannerActivity.java] (https://github.com/dm77/barcodescanner/blob/master/zxing/sample/src/main/java/me/dm7/barcodescanner/zxing/sample/ScannerActivity.java) or [ScannerFragment.java] (https://github.com/dm77/barcodescanner/blob/master/zxing/sample/src/main/java/me/dm7/barcodescanner/zxing/sample/ScannerFragment.java) classes to get an idea on advanced usage.
Interesting methods on the ZXingScannerView include:
// Toggle flash:
void setFlash(boolean);
// Toogle autofocus:
void setAutoFocus(boolean);
// Specify interested barcode formats:
void setFormats(List<BarcodeFormat> formats);
// Specify the cameraId to start with:
void startCamera(int cameraId);Specify front-facing or rear-facing cameras by using the void startCamera(int cameraId); method.
Supported Formats:
BarcodeFormat.UPC_A
BarcodeFormat.UPC_E
BarcodeFormat.EAN_13
BarcodeFormat.EAN_8
BarcodeFormat.RSS_14
BarcodeFormat.CODE_39
BarcodeFormat.CODE_93
BarcodeFormat.CODE_128
BarcodeFormat.ITF
BarcodeFormat.CODABAR
BarcodeFormat.QR_CODE
BarcodeFormat.DATA_MATRIX
BarcodeFormat.PDF_417Add the following dependency to your build.gradle file.
compile 'me.dm7.barcodescanner:zbar:1.9.3'
1.) Add camera permission to your AndroidManifest.xml file:
<uses-permission android:name="android.permission.CAMERA" />2.) A very basic activity would look like this:
public class SimpleScannerActivity extends Activity implements ZBarScannerView.ResultHandler {
private ZBarScannerView mScannerView;
@Override
public void onCreate(Bundle state) {
super.onCreate(state);
mScannerView = new ZBarScannerView(this); // Programmatically initialize the scanner view
setContentView(mScannerView); // Set the scanner view as the content view
}
@Override
public void onResume() {
super.onResume();
mScannerView.setResultHandler(this); // Register ourselves as a handler for scan results.
mScannerView.startCamera(); // Start camera on resume
}
@Override
public void onPause() {
super.onPause();
mScannerView.stopCamera(); // Stop camera on pause
}
@Override
public void handleResult(Result rawResult) {
// Do something with the result here
Log.v(TAG, rawResult.getContents()); // Prints scan results
Log.v(TAG, rawResult.getBarcodeFormat().getName()); // Prints the scan format (qrcode, pdf417 etc.)
// If you would like to resume scanning, call this method below:
mScannerView.resumeCameraPreview(this);
}
}Please take a look at the [zbar/sample] (https://github.com/dm77/barcodescanner/tree/master/zbar/sample) project for a full working example.
Take a look at the [ScannerActivity.java] (https://github.com/dm77/barcodescanner/blob/master/zbar/sample/src/main/java/me/dm7/barcodescanner/zbar/sample/ScannerActivity.java) or [ScannerFragment.java] (https://github.com/dm77/barcodescanner/blob/master/zbar/sample/src/main/java/me/dm7/barcodescanner/zbar/sample/ScannerFragment.java) classes to get an idea on advanced usage.
Interesting methods on the ZBarScannerView include:
// Toggle flash:
void setFlash(boolean);
// Toogle autofocus:
void setAutoFocus(boolean);
// Specify interested barcode formats:
void setFormats(List<BarcodeFormat> formats);Specify front-facing or rear-facing cameras by using the void startCamera(int cameraId); method.
Supported Formats:
BarcodeFormat.PARTIAL
BarcodeFormat.EAN8
BarcodeFormat.UPCE
BarcodeFormat.ISBN10
BarcodeFormat.UPCA
BarcodeFormat.EAN13
BarcodeFormat.ISBN13
BarcodeFormat.I25
BarcodeFormat.DATABAR
BarcodeFormat.DATABAR_EXP
BarcodeFormat.CODABAR
BarcodeFormat.CODE39
BarcodeFormat.PDF417
BarcodeFormat.QR_CODE
BarcodeFormat.CODE93
BarcodeFormat.CODE128
mkdir some_work_dir
cd work_dir
wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz
tar zxvf libiconv-1.14.tar.gz
Patch the localcharset.c file: vim libiconv-1.14/libcharset/lib/localcharset.c
On line 48, add the following line of code:
#undef HAVE_LANGINFO_CODESET
Save the file and continue with steps below:
cd libiconv-1.14
./configure
cd ..
hg clone http://hg.code.sf.net/p/zbar/code zbar-code
cd zbar-code/android
android update project -p . -t 'android-19'
Open jni/Android.mk file and add fPIC flag to LOCAL_C_FLAGS. Open jni/Application.mk file and specify APP_ABI targets as needed.
ant -Dndk.dir=$NDK_HOME -Diconv.src=some_work_dir/libiconv-1.14 zbar-clean zbar-all
Upon completion you can grab the .so and .jar files from the libs folder.
Almost all of the code for these library projects is based on:
- CameraPreview app from Android SDK APIDemos
- The ZXing project: https://github.com/zxing/zxing
- The ZBar Android SDK: http://sourceforge.net/projects/zbar/files/AndroidSDK/
https://github.com/dm77/barcodescanner/graphs/contributors
Apache License, Version 2.0