Question

我正在使用QRGen库为QR码生成ByteArrayOutputStream并为其生成位图图像。

我已将以下3个罐子导入我的项目中：

qrgen-1.0.jar
斑马线核-1.7.jar
斑马线-J2SE-1.7.jar

这是生成QR码ByteArray的方法：

public Bitmap qrBitmapFromString(String qrText){
    ByteArrayOutputStream out = QRCode.from(qrText).to(ImageType.PNG).withSize(300, 300).stream();
    byte[] data = out.toByteArray();
    Bitmap bmp = BitmapFactory.decodeByteArray (data,0,data.length, null);
    return bmp;
}

但是我收到以下错误：

03-05 12:39:31.089: E/AndroidRuntime(1479): FATAL EXCEPTION: main
03-05 12:39:31.089: E/AndroidRuntime(1479): java.lang.NoClassDefFoundError: java.awt.image.BufferedImage
03-05 12:39:31.089: E/AndroidRuntime(1479):     at com.google.zxing.client.j2se.MatrixToImageWriter.toBufferedImage(MatrixToImageWriter.java:48)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at com.google.zxing.client.j2se.MatrixToImageWriter.writeToStream(MatrixToImageWriter.java:75)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at net.glxn.qrgen.QRCode.stream(QRCode.java:99)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at co.emuze.emuzepay.PayCardFragment.qrBitmapFromString(PayCardFragment.java:27)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at co.emuze.emuzepay.PayCardFragment.onCreateView(PayCardFragment.java:23)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:795)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:998)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.BackStackRecord.run(BackStackRecord.java:622)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1330)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.Activity.performStart(Activity.java:4474)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1928)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.ActivityThread.access$600(ActivityThread.java:122)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.os.Looper.loop(Looper.java:137)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at android.app.ActivityThread.main(ActivityThread.java:4340)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at java.lang.reflect.Method.invokeNative(Native Method)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at java.lang.reflect.Method.invoke(Method.java:511)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-05 12:39:31.089: E/AndroidRuntime(1479):     at dalvik.system.NativeStart.main(Native Method)

导致这种情况的原因是什么？

Answer 1

堆栈跟踪回答您的问题。 Android中不存在java.awt个类。您不能使用使用AWT的库。你不能使用QRGen，或至少不使用它的这一部分。

Answer 2

2.0-SNAPSHOT应该解决这个https://oss.sonatype.org/content/repositories/snapshots/net/glxn/qrgen/android/2.0-SNAPSHOT/

https://github.com/kenglxn/QRGen

Answer 3

2.0-SNAPSHOT在Android上工作得非常好，并且在上周变得更快。可以在此处找到一个示例：https://github.com/atomfrede/qrgen-android-example

使用QRGen库生成QR码时出错

3 个答案: