【Android QR Code】开源项目：ZXing（一）导入项目

维基百科：QR Code

http://en.wikipedia.org/wiki/QR_code

开源项目：ZXing

http://code.google.com/p/zxing/

1、下载源代码

导航栏，选择Downloads

下载当前最新版本

2、导入项目

解压下载的.zip文件

打开Eclipse，菜单栏，选择file -> new -> project...

在弹出的New Project对话框中，选择Android -> Android Project from Existing Code，点击Next

Root Directory文本框，点击Browse按钮，选择zxing/android文件夹，点击Finish

3、排错

错误1：导入的项目，红叉报错，无法运行

打开报错的文件，错误的原因是没有找到类文件

解决的方法：添加core.jar包

在Package Explorer选择导入的项目，右键 -> Build Path -> Add External Archives...

选择zxing/core目录下的core.jar

错误2：运行项目，应用异常退出

查看logcat，内容如下所示：

11-26 13:21:37.044: E/AndroidRuntime(16533): FATAL EXCEPTION: main
11-26 13:21:37.044: E/AndroidRuntime(16533): java.lang.ExceptionInInitializerError
11-26 13:21:37.044: E/AndroidRuntime(16533):    at java.lang.Class.newInstanceImpl(Native Method)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at java.lang.Class.newInstance(Class.java:1429)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.app.Instrumentation.newActivity(Instrumentation.java:1036)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2701)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2803)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.app.ActivityThread.access$2300(ActivityThread.java:135)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2136)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.os.Handler.dispatchMessage(Handler.java:99)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.os.Looper.loop(Looper.java:144)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at android.app.ActivityThread.main(ActivityThread.java:4937)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at java.lang.reflect.Method.invokeNative(Native Method)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at java.lang.reflect.Method.invoke(Method.java:521)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-26 13:21:37.044: E/AndroidRuntime(16533):    at dalvik.system.NativeStart.main(Native Method)
11-26 13:21:37.044: E/AndroidRuntime(16533): Caused by: java.lang.NoClassDefFoundError: com.google.zxing.ResultMetadataType
11-26 13:21:37.044: E/AndroidRuntime(16533):    at com.google.zxing.client.android.CaptureActivity.<clinit>(CaptureActivity.java:101)
11-26 13:21:37.044: E/AndroidRuntime(16533):    ... 15 more