Zxing Library java.lang.ExceptionInInitializerError

Question

我正在使用ZXing库，我已经从从 code.google.com 下载的ZXing文件夹中导入了"android"项目，并使其成为库，也是核心.jar文件被添加到库中。当我运行它强制关闭的应用程序时，

日志猫

10-26 15:16:58.495: E/AndroidRuntime(21673): FATAL EXCEPTION: main
10-26 15:16:58.495: E/AndroidRuntime(21673): java.lang.ExceptionInInitializerError
10-26 15:16:58.495: E/AndroidRuntime(21673):    at java.lang.Class.newInstanceImpl(Native Method)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at java.lang.Class.newInstance(Class.java:1429)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2583)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2685)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.app.ActivityThread.access$2300(ActivityThread.java:126)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2038)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.os.Handler.dispatchMessage(Handler.java:99)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.os.Looper.loop(Looper.java:123)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at android.app.ActivityThread.main(ActivityThread.java:4633)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at java.lang.reflect.Method.invokeNative(Native Method)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at java.lang.reflect.Method.invoke(Method.java:521)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
10-26 15:16:58.495: E/AndroidRuntime(21673):    at dalvik.system.NativeStart.main(Native Method)
10-26 15:16:58.495: E/AndroidRuntime(21673): Caused by: java.lang.NoClassDefFoundError: com.google.zxing.ResultMetadataType
10-26 15:16:58.495: E/AndroidRuntime(21673):    at com.google.zxing.client.android.CaptureActivity.<clinit>(CaptureActivity.java:97)

半月板.xml文件 内容是

  <?xml version="1.0" encoding="utf-8"?>
     <manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="in.blogspot.khurram2java"
      android:versionCode="1"
      android:versionName="1.0" >
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="16" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.FLASHLIGHT" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="in.blogspot.khurram2java.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.google.zxing.client.android.CaptureActivity"
            android:configChanges="orientation|keyboardHidden"
            android:screenOrientation="landscape"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
            android:windowSoftInputMode="stateAlwaysHidden" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
            <intent-filter>
                <action android:name="com.google.zxing.client.android.SCAN" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
    </application>
    </manifest>

MainActivity.java

Intent intent = new Intent(MainActivity.this,CaptureActivity.class);
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);

Answer 1

您可以通过以下链接执行此操作

https://stackoverflow.com/a/19293128/958850

但是，不建议将示例项目用作库项目。

Answer 2

答案就在那里：NoClassDefFoundError .您实际上并未在应用程序中包含库类。

另外，请不要复制android/并将其用作克隆。按原样使用我们的名字/UI/命名空间甚至不合法。