This is a source on the zxing oh You need to have a good look

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.....................\.classpath
.....................\.gitignore
.....................\.project
.....................\AndroidManifest.xml
.....................\LICENSE
.....................\README.md
.....................\doc
.....................\...\readme.txt
.....................\ic_launcher-web.png
.....................\libs
.....................\....\android-core-3.1.1-SNAPSHOT.jar
.....................\....\android-support-v4.jar
.....................\....\core-3.1.1-SNAPSHOT.jar
.....................\lint.xml
.....................\proguard-project.txt
.....................\project.properties
.....................\res
.....................\...\drawable-hdpi
.....................\...\.............\ic_launcher.png
.....................\...\.............\scan_corner_bottom_left.png
.....................\...\.............\scan_corner_bottom_right.png
.....................\...\.............\scan_corner_top_left.png
.....................\...\.............\scan_corner_top_right.png
.....................\...\.............\scan_fail.png
.....................\...\.............\scan_flashlight_normal.png
.....................\...\.............\scan_flashlight_pressed.png
.....................\...\.............\scan_history_normal.png
.....................\...\.............\scan_history_pressed.png
.....................\...\.............\scan_laser.png
.....................\...\.............\scan_photo_normal.png
.....................\...\.............\scan_photo_pressed.png
.....................\...\.............\thumb_unfocus.png
.....................\...\drawable-mdpi
.....................\...\.............\ic_launcher.png
.....................\...\drawable-xhdpi
.....................\...\..............\ic_launcher.png
.....................\...\drawable-xxhdpi
.....................\...\...............\ic_launcher.png
.....................\...\drawable
.....................\...\........\scan_flashlight.xml
.....................\...\........\scan_history.xml
.....................\...\........\scan_photo.xml
.....................\...\........\seekbar_bg.xml
.....................\...\........\seekbar_style.xml
.....................\...\layout
.....................\...\......\capture.xml
.....................\...\raw
.....................\...\...\beep.ogg
.....................\...\values-v11
.....................\...\..........\styles.xml
.....................\...\values-v14
.....................\...\..........\styles.xml
.....................\...\values
.....................\...\......\colors.xml
.....................\...\......\ids.xml
.....................\...\......\strings.xml
.....................\...\......\styles.xml
.....................\src
.....................\...\cn
.....................\...\..\hugo
.....................\...\..\....\android
.....................\...\..\....\.......\scanner
.....................\...\..\....\.......\.......\AmbientLightManager.java
.....................\...\..\....\.......\.......\BeepManager.java
.....................\...\..\....\.......\.......\CaptureActivity.java
.....................\...\..\....\.......\.......\FinishListener.java
.....................\...\..\....\.......\.......\InactivityTimer.java
.....................\...\..\....\.......\.......\IntentSource.java
.....................\...\..\....\.......\.......\Intents.java
.....................\...\..\....\.......\.......\camera
.....................\...\..\....\.......\.......\......\AutoFocusManager.java
.....................\...\..\....\.......\.......\......\CameraConfigurationManager.java
.....................\...\..\....\.......\.......\......\CameraManager.java
.....................\...\..\....\.......\.......\......\FrontLightMode.java
.....................\...\..\....\.......\.......\......\OpenCameraInterface.java
.....................\...\..\....\.......\.......\......\PreviewCallback.java
.....................\...\..\....\.......\.......\common
.....................\...\..\....\.......\.......\......\BitmapUtils.java
.....................\...\..\....\.......\.......\......\Runnable.ja

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